JP7318630B2 - power transmission device - Google Patents

Description

The present invention relates to power transmission devices.

2. Description of the Related Art As a power transmission device mounted on a vehicle, a transfer that distributes and transmits power from an engine (first power source) to front wheels and rear wheels is known. The output side of the transfer is connected to a front wheel propeller shaft and a rear wheel propeller shaft. The transfer can switch between a two-wheel drive state in which power is output to only one propeller shaft and a four-wheel drive state in which power is output to both propeller shafts.

In Patent Document 1, in a transfer having a secondary power source (second power source) in a transfer case, the power output from the second power source is transferred to the front wheels via one planetary gear device (differential device). and to the rear wheels. In the configuration described in Patent Literature 1, one of three rotating elements included in the differential is fixed to a transfer case (fixed member) to cause the differential to function as a transmission. 1, the rotation of the power source can be changed by a differential gear and transmitted to the output member.

WO2010/141682

When two power sources are connected to the differential and the rotary element of the differential is fixed, the rotary element that can be fixed to the fixed member is connected to one of the power sources as in the configuration described in Patent Document 1. In a power transmission device in which rotating elements are configured identically, the power of two power sources cannot be transmitted to the output shaft.

The present invention has been made in view of the above circumstances, and drives the power of one of the power sources while one of the three rotating elements included in the differential is fixed to a fixed member. An object of the present invention is to provide a power transmission device capable of transmitting power to wheels.

The present invention provides an input shaft for inputting power from a first power source, a second power source, a first output shaft for transmitting power to the first drive wheels, and a second drive shaft for transmitting power to the second drive wheels. an output shaft, a differential device having three rotating elements, a connection switching device for selectively switching a connection relationship between the input shaft, the first output shaft, the second output shaft and the three rotating elements; wherein the connection switching device is configured to selectively fix any one of the three rotating elements to a fixed member, wherein the second power source comprises Among the three rotating elements, the connection switching device connects to a rotating element other than the rotating element fixed to the fixed member, and the differential device can be switched between a plurality of modes by the connection switching device. , the plurality of modes are configured such that one of the three rotating elements is connected to the input shaft, one of the remaining rotating elements is fixed to the fixed member, and the other is fixed to the fixed member. is connected to the first output shaft; and a second mode in which the three rotating elements are connected to the second power source, the first output shaft, and the second output shaft, respectively. and

According to this configuration, in the power transmission device including the second power source, the second power source is connected to the rotating element other than the rotating element fixed to the fixed member, out of the three rotating elements forming the differential. It is connected. Accordingly, when power is transmitted with one rotating element fixed to the fixed member, the power of the second power source can be transmitted to the first output shaft and the second output shaft.

Further, an input shaft for inputting power from the first power source, a motor functioning as a second power source, a first output shaft for transmitting power to the main drive wheels, and a second drive shaft for transmitting power to the auxiliary drive wheels. an output shaft; a planetary gear device having three rotating elements; a speed change state in which the rotation of the input shaft is changed by the planetary gear device and transmitted to the first output shaft; a non-distribution state in which power is transmitted only to the first output shaft out of the first output shaft and the second output shaft; a distribution switching unit for switching between a distribution state in which power is transmitted to the first output shaft and the second output shaft; The transfer is configured such that any one of the rotating elements is fixed to a fixed member, and the motor rotates the rotating element other than the rotating element fixed to the fixed member by the speed change section among the three rotating elements. element, the planetary gear device can be switched to a plurality of modes by the speed change switching unit and the distribution switching unit, and the plurality of modes are selected by two of the three rotating elements. are connected to each other, and any one of the rotary elements is connected to the first output shaft, and any one of the three rotary elements is connected to the input shaft, and the remaining one of the rotating elements is fixed to the fixed member and the other is connected to the first output shaft; and the three rotating elements are the motor and the first output shaft. and a second mode respectively coupled to the second output shaft.

According to this configuration, when the main driving wheels are driven by the power of the first power source with one of the three rotating elements included in the planetary gear set connected to the fixed member, the power of the motor can be transmitted to the main drive wheels.

Further, the three rotating elements include a first rotating element, a second rotating element, and a third rotating element connected to the motor, and the shift switching unit switches the connection destination of the input shaft. An input switching member is provided, and the input switching member is between a first input state in which the input shaft is connected to the first rotating element and a second input state in which the input shaft is directly connected to the first output shaft. When the planetary gear device is in the third mode and the three rotating elements rotate together, the input switching member is in the second input state and directly connects the input shaft to the first output shaft, The planetary gear device is in the first mode, the first rotating element is an input element, the second rotating element is a reaction element fixed to the fixed member, and the third rotating element is connected to the first output shaft. the input switching member is in the first input state to connect the input shaft to the first rotating element, the planetary gear device is in the second mode, and the three rotating elements are in the second mode. When differential is possible, the input switching member may be in the second input state and directly connect the input shaft to the first output shaft.

According to this configuration, the input switching member allows the power transmission path for transmitting the power of the input shaft to the planetary gear device and the power transmission path for transmitting the power of the input shaft to the first output shaft without going through the planetary gear device. can be switched between

Further, a transmission section for transmitting power to the second output shaft is further provided, and the distribution switching section includes a first distribution switching member for selectively connecting the first output shaft to the transmission section; and a second distribution switching member that selectively connects an element or the third rotating element to the transmission section, and the first distribution switching member is configured to connect the first output shaft to the transmission section. A first distribution state in which the second rotating element is connected to the first output shaft, and a first distribution state in which the second rotating element is connected to the first output shaft when the first output shaft is not connected to the transmission section. The second distribution switching member for switching between a non-distribution state and a second non-distribution state in which the third rotary element is connected to the first output shaft when the first output shaft is not connected to the transmission portion. is a member that also functions as the speed change section, and is in an integrated state in which the second rotating element and the third rotating element are connected, and in a fixed state in which the third rotating element is connected to the fixed member. , a second distribution state in which the second rotating element is connected to the transmission section, and the shift switching section is an engagement device having the second distribution switching member as an engagement element, Switching may be performed between an engaged state in which the distribution switching member is connected to the fixed member and a released state in which the second distribution switching member is rotatably released.

According to this configuration, the first distribution switching member and the second distribution switching member provide a non-distribution state in which the power of the input shaft is transmitted only to the first output shaft, and a part of the power transmitted to the first output shaft. can be switched between a distribution state of distributing to the transmission unit.

Further, when the second distribution switching member is in the fixed state and the planetary gear device is in the first mode, the input switching member switches between the first input state and the second input state. and the first distribution switching member is switchable between the first distribution state and the first non-distribution state, when the planetary gear set is in the first mode. Further, when the input switching member is in the first input state and the first distribution switching member is in the first distribution state, the power from the first power source and the power from the motor are combined with the planetary gear. The power is distributed to the main drive wheels and the sub drive wheels via a device, and the rotation of the input shaft and the rotation of the motor are changed by the planetary gear device and transmitted to the main drive wheels and the sub drive wheels. It may be in the first drive state.

According to this configuration, the power of the motor can be transmitted to the main drive wheels via the planetary gear set in the first mode.

Further, when the planetary gear device is in the first mode, the input switching member is in the second input state and the first distribution switching member is in the first non-distribution state. 1 power source is directly transmitted from the input shaft to the first output shaft, power of the motor is transmitted to the first output shaft through the planetary gear device, and the first A second drive state may be established in which the power from the power source and the power of the motor are not transmitted to the second output shaft.

According to this configuration, the power of the motor can be transmitted to the main drive wheels via the planetary gear set in the first mode.

Further, when the planetary gear device is in the third mode and the three rotating elements rotate integrally, the first distribution switching member is in the first distribution state, the first non-distribution state, and the second non-distribution state. It may be possible to switch between

According to this configuration, the connection relationship of the first distribution switching member can be switched while the planetary gear device is set to the third mode.

Further, when the planetary gear device is in the second mode and the three rotating elements are differentially operable, the first distribution switching member is in the second non-distribution state, and the second distribution switching member is in the second non-distribution state. A second distribution state may occur.

According to this configuration, the first distribution switching member can be set to the second non-distribution state and the second distribution switching member can be set to the second distribution state while the planetary gear device is set to the second mode.

Further, a transmission portion for transmitting power to the second output shaft is further provided, and the gear shift switching portion has the third rotating element as an engaging element, and is in an engaged state in which the third rotating element is connected to the fixed member. and a released state in which the third rotating element is rotatably released; the second rotating element and the third rotating element as engaging elements; and the second rotating element a second engaging device that switches between an engaged state in which the third rotating element is engaged and a released state in which the second rotating element is released so as to be rotatable relative to the third rotating element; and the distribution switching section includes a distribution switching member that switches between a first distribution state in which the first output shaft is connected to the transmission section and a second distribution state in which the third rotating element is connected to the transmission section. may have.

According to this configuration, it is possible to construct a transfer having a shift changeover section having the first engagement device and the second engagement device.

Further, when the planetary gear device is in the second mode and the three rotating elements are differentially operable, the first engagement device is in the released state, and the second engagement device is in the released state. and the distribution switching member may be in the second distribution state in which it is not connected to the first output shaft.

According to this configuration, it is possible to disengage the first engaging device, disengage the second engaging device, and bring the distribution switching member into the second distributing state while the planetary gear device is set to the second mode. can.

Further, when the planetary gear device is in the first mode, the first engagement device is in the engagement state and connects the third rotating element to the fixed member, and the second engagement device is in the engagement state. A released state may be established to allow rotation of the second rotating element, and the distribution switching member may be in the first distributing state in which it is not connected to the third rotating element.

According to this configuration, by engaging the first engagement device, the planetary gear device can be set to the first mode, and the distribution switching member can be set to the first distribution state.

Further, a transmission part for transmitting power to the second output shaft is further provided, and the three rotating elements are a first rotating element connected to the input shaft, a second rotating element, and a second rotating element connected to the motor. and a third rotating element, wherein the shift switching unit has the second rotating element as an engaging element, an engaged state in which the second rotating element is connected to the fixed member, and a state in which the second rotating element rotates. Engagement elements are a first engagement device that switches between a disengagement state that enables disengagement, the second rotation element and the third rotation element, and the second rotation element and the third rotation element are engaged. a second engagement device that switches between an engaged state in which the a first distribution switching member that selectively connects the input shaft or the transmission section to the first output shaft; and a second distribution switching member that selectively connects the element or the third rotating element to the transmission section.

According to this configuration, it becomes possible to apply the planetary gear device in which the motor is connected to the third rotating element to the transfer.

Further, when the planetary gear device is in the second mode and the three rotating elements are differentially operable, the first engagement device is in the released state, and the second engagement device is in the released state. , the first distribution switching member is in a non-distribution state in which the input shaft is directly connected to the first output shaft without being connected to the transmission portion, and the second distribution switching member is connected to the third rotating element. A first distribution state may be established in which the second rotary element is connected to the transmission portion without being connected.

According to this configuration, even when the motor is connected to the third rotating element, the power of the motor can be transmitted to the driving wheels.

Further, when the planetary gear device is in the first mode, the first engagement device is in the engagement state and connects the second rotating element to the fixed member, and the second engagement device is in the engagement state. The third rotary element becomes rotatable in a released state, and the first distribution switching member enters a second distribution state in which the first output shaft is connected to the transmission portion without being connected to the input shaft. The 2-distribution switching member may be in a third distribution state in which the third rotation element is connected to the transmission portion without being connected to the second rotation element.

According to this configuration, even when the motor is connected to the third rotating element, the power of the motor can be transmitted to the driving wheels.

Further, a transmission section for transmitting power to the second output shaft is further provided, and the three rotating elements include a first rotating element, a second rotating element, and a third rotating element connected to the motor. wherein the shift switching unit has an input switching member that selectively connects the input shaft to the first rotating element, and the distribution switching unit also functions as an input switching unit that switches the connection destination of the input shaft. a first distribution switching member that selectively connects the first output shaft to the transmission section; a second distribution switching member that selectively connects the second rotating element to the transmission section; wherein the first distribution switching member connects the second rotary element to the first output shaft without connecting to the input shaft when the first output shaft is connected to the transmission section. The second distribution switching member switches between a 1 distribution state and a non-distribution state in which the input shaft is connected to the first output shaft when the first output shaft is not connected to the transmission portion. An integrated state in which the second rotating element and the third rotating element are connected, a fixed state in which the third rotating element is connected to the fixed member, and a second distributing state in which the second rotating element is connected to the transmission section. The gear shift switching unit is an engagement device having the second distribution switching member as an engagement element, and the engagement state in which the second distribution switching member is connected to the fixed member; It may be switched between a released state that rotatably releases the two-distribution switching member.

According to this configuration, it is possible to switch the connection relationship between the input shaft and the first output shaft by the first distribution switching member.

Further, when the second distribution switching member is in the fixed state and the planetary gear device is in the first mode, the input switching member is in the first input state in which the input shaft is connected to the first rotating element. , the first distribution switching member may be in the first distribution state to connect the first output shaft to the transmission portion.

According to this configuration, the first distribution switching member can connect the first output shaft to the transmission section even in a configuration in which the connection relationship between the input shaft and the first output shaft is switched by the first distribution switching member. .

Further, when the planetary gear device is in the third mode and the three rotating elements rotate integrally, the input switching member is in a second input state in which the input shaft is not connected to the first rotating element, and the first When the distribution switching member is in the non-distribution state, the second distribution switching member is in the fixed state, and the planetary gear device is in the first mode, the input switching member rotates the input shaft for the first rotation. element, the first distribution switching member enters the first distribution state, connects the first output shaft to the transmission portion, the planetary gear device enters the second mode, and the three rotations When the element is differential, the input switching member is in the second input state in which the input shaft is not connected to the first rotating element, the first distribution switching member is in the non-distribution state, and the second The distribution switching member may be in the second distribution state to connect the second rotating element to the transmission section.

According to this configuration, the first distribution switching member can connect the first output shaft to the transmission section even in a configuration in which the connection relationship between the input shaft and the first output shaft is switched by the first distribution switching member. .

Further, the planetary gear device is a single pinion type planetary gear device, the first rotating element is a sun gear, the second rotating element is a carrier, and the third rotating element is a ring gear. may

According to this configuration, the planetary gear device can be configured as a single pinion type.

In the present invention, in a power transmission device provided with a second power source, the second power source is connected to a rotating element other than the rotating element fixed to the fixed member, among the three rotating elements forming the differential. ing. Accordingly, when power is transmitted with one rotating element fixed to the fixed member, the power of the second power source can be transmitted to the first output shaft and the second output shaft.

FIG. 1 is a skeleton diagram schematically showing a vehicle equipped with the power transmission device of the first embodiment. FIG. 2 is a skeleton diagram showing a case where the transfer of the first embodiment is in the first drive state. FIG. 3 is a nomographic diagram showing the state of the rotating elements in the planetary gear set in the first drive state. FIG. 4 is a skeleton diagram showing a case where the transfer of the first embodiment is in the second drive state. FIG. 5 is a nomographic diagram showing the state of the rotating elements in the planetary gear set in the second drive state. FIG. 6 is a skeleton diagram showing a case where the transfer of the first embodiment is in the third drive state. FIG. 7 is a nomographic diagram showing the state of the rotating elements in the planetary gear set in the third drive state. FIG. 8 is a skeleton diagram showing a case where the transfer of the first embodiment is in the fourth drive state. FIG. 9 is a nomographic diagram showing the state of the rotating elements in the planetary gear set in the fourth drive state. FIG. 10 is a skeleton diagram showing the case where the transfer of the first embodiment is in the fifth drive state. FIG. 11 is a nomographic diagram showing the state of the rotating elements in the planetary gear set in the fifth drive state. FIG. 12 is a skeleton diagram that schematically shows a transfer in the power transmission device of the second embodiment. FIG. 13 is a skeleton diagram that schematically shows the transfer in the power transmission device of the third embodiment. FIG. 14 is a skeleton diagram that schematically shows the transfer in the power transmission device of the fourth embodiment. FIG. 15 is a skeleton diagram that schematically shows the transfer in the power transmission device of the fifth embodiment. FIG. 16 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the second drive state. FIG. 17 is a skeleton diagram showing the case where the transfer of the fifth embodiment is in the third drive state. FIG. 18 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the fourth drive state. FIG. 19 is a skeleton diagram showing a case where the transfer of the fifth embodiment is in the fifth drive state. FIG. 20 is a skeleton diagram schematically showing the transfer in the first modified example of the fifth embodiment. FIG. 21 is a skeleton diagram showing a case where the transfer is in the second driving state in the first modified example of the fifth embodiment. FIG. 22 is a skeleton diagram schematically showing the transfer in the second modified example of the fifth embodiment. FIG. 23 is a skeleton diagram that schematically shows a transfer in the power transmission device of the sixth embodiment. FIG. 24 is a skeleton diagram showing a case where the transfer in the power transmission device of the sixth embodiment is in the second drive state. FIG. 25 is a skeleton diagram schematically showing the transfer in the first modified example of the sixth embodiment. FIG. 26 is a skeleton diagram schematically showing the transfer in the second modified example of the sixth embodiment. FIG. 27 is a skeleton diagram that schematically shows a transfer in the power transmission device of the seventh embodiment. FIG. 28 is a nomographic diagram showing the state of the rotating elements in the planetary gear device in the second drive state in the seventh embodiment. FIG. 29 is a nomographic diagram showing the state of the rotating elements in the planetary gear device in the case of the third drive state in the seventh embodiment. FIG. 30 is a nomographic diagram showing the state of the rotating elements in the planetary gear device in the fifth drive state in the seventh embodiment. FIG. 31 is a skeleton diagram schematically showing the transfer in the first modified example of the seventh embodiment. FIG. 32 is a skeleton diagram that schematically shows the transfer in the second modified example of the seventh embodiment.

A power transmission device according to an embodiment of the present invention will be specifically described below with reference to the drawings. In addition, this invention is not limited to embodiment described below.

FIG. 1 is a skeleton diagram schematically showing a vehicle equipped with the power transmission device of the first embodiment. The vehicle 1 includes an engine 2 as a power source, left and right front wheels 3L and 3R, left and right rear wheels 4L and 4R, and a power transmission device 10 that transmits the power of the engine 2 to the front wheels 3 and the rear wheels 4, respectively. , is equipped with This vehicle 1 is a four-wheel drive vehicle based on a front engine rear wheel drive. The rear wheels 4 are main driving wheels that are driving wheels during both two-wheel drive and four-wheel drive. On the other hand, the front wheels 3 are sub-driving wheels, which become driven wheels during two-wheel drive running, and drive wheels during four-wheel drive running.

The power transmission device 10 includes a transmission 11 connected to the engine 2, a transfer 12 which is a front and rear wheel power distribution device connected to the transmission 11, and a front propeller shaft 13 and a rear propeller shaft connected to the transfer 12, respectively. 14, a front wheel differential gear mechanism 15 connected to the front propeller shaft 13, a rear wheel differential gear mechanism 16 connected to the rear propeller shaft 14, and left and right front wheel axles connected to the front wheel differential gear mechanism 15. 17L, 17R, and left and right rear wheel axles 18L, 18R connected to the rear wheel differential gear mechanism 16 . When the left and right wheels and axles are not particularly distinguished, the symbols L and R are omitted and the front wheels 3, the rear wheels 4, the front wheel axles 17, and the rear wheel axles 18 are described.

Power output from the engine 2 is transmitted to the transfer 12 via the transmission 11 . The power transmitted to the transfer 12 is transmitted from the transfer 12 to the rear wheels 4 through the rear propeller shaft 14, the rear wheel differential gear mechanism 16, and the rear wheel side power transmission path of the rear wheel axle 18 in sequence. be. A part of the power transmitted to the rear wheels 4 is distributed to the front wheels 3 by the transfer 12, and the front propeller shaft 13, the front-wheel differential gear mechanism 15, and the front-wheel-side power transmission path of the front-wheel axle 17 are sequentially transmitted. is transmitted to the front wheels 3 via the

FIG. 2 is a skeleton diagram showing a case where the transfer of the first embodiment is in the first drive state. The transfer 12 of the first embodiment has a transfer case 20 which is a non-rotating member. The transfer 12 has an input shaft 21, a rear wheel side output shaft 22 as a first output shaft that outputs power to the rear wheels 4 that are the main drive wheels, and an output shaft 22 that outputs power to the front wheels 3 that are auxiliary drive wheels. It has a front wheel side output shaft 23 as a second output shaft for outputting power, and a planetary gear device 24 as a transmission section for transmitting the rotation of the input shaft 21 to the rear wheel side output shaft 22 . The transfer 12 includes a transmission portion 25 functioning as an input portion to the front wheels and a drive shaft 23 for outputting power to the front wheel side output shaft 23 as rotating members forming a power transmission path for the front wheels. A gear 26 , a driven gear 27 provided integrally with the front-wheel-side output shaft 23 , and a front-wheel drive chain 28 connecting between the drive gear 26 and the driven gear 27 are provided. Further, the transfer 12 includes a motor 30 that functions as a power source and a connection switching device 40 that switches the connection state of the rotating member in the transfer case 20 .

The input shaft 21 is an input member that inputs power from the engine 2 to the transfer 12 . Power from the engine 2 is transmitted to the input shaft 21 via the transmission 11 . For example, input shaft 21 is spline-fitted to an output member (not shown) of transmission 11 .

The rear wheel side output shaft 22 is an output member that outputs power from the transfer 12 to the rear wheels 4 . The rear-wheel-side output shaft 22 is a main drive shaft arranged on the same axis as the input shaft 21 and connected to the rear propeller shaft 14 .

The front-wheel-side output shaft 23 is an output member that outputs power from the transfer 12 to the front wheels 3 . The front-wheel-side output shaft 23 is arranged on an axis different from that of the input shaft 21 and the rear-wheel-side output shaft 22 and is a sub-drive shaft connected to the front propeller shaft 13 . The front-wheel output shaft 23 rotates as the drive gear 26 rotates. The drive gear 26 is connected to the transmission portion 25 so as to rotate integrally therewith.

The transmission portion 25 is a rotating member that transmits power to the front-wheel-side output shaft 23 . The transmission unit 25 is switched by the connection switching device 40 between a connected state in which the power of the rear-wheel output shaft 22 is transmitted and a disconnected state in which the power of the rear-wheel output shaft 22 is not transmitted. The transmission portion 25 and the drive gear 26 are arranged so as to be relatively rotatable with respect to the rear wheel side output shaft 22 . In the transfer 12 , a transmission portion 25 , a drive gear 26 and a planetary gear device 24 are arranged on the same center of rotation as the rear wheel side output shaft 22 .

The planetary gear device 24 is configured by a single pinion type planetary gear device having three rotating elements. The planetary gear device 24 functions as a speed changer that changes the speed of rotation from the engine 2 and outputs the speed. As shown in FIG. 2, the planetary gear device 24 has three rotating elements: a sun gear S, a carrier C that supports a plurality of pairs of mutually meshing pinion gears so that they can rotate and revolve, and the sun gear S that meshes with the pinion gears. A ring gear R is provided. The sun gear S is a first rotating element that functions as an input element. The sun gear S is always connected to a motor 30 functioning as a second power source. Carrier C is a second rotating element that functions as an output element. Ring gear R is a third rotating element that functions as a reaction element.

A connection switching device 40 selectively switches the connection destinations of the three rotating elements, ie, the sun gear S, the carrier C, and the ring gear R. A rotating member that rotates integrally with each of the three rotating elements is connected to the rotating element.

The sun gear S is connected with a first rotating member 51 that functions as an input portion of the planetary gear device 24 . The first rotating member 51 is a member that rotates integrally with the sun gear S, and has input gear teeth 51a. A rotating member on the side of the engine 2, which is the first power source, is connected to the input gear teeth 51a. An input gear 33 to which power from the motor 30 is input is attached to the first rotating member 51 . The input gear 33 and the first rotating member 51 rotate together.

A second rotating member 52 that functions as an output portion of the planetary gear device 24 is connected to the carrier C. As shown in FIG. The second rotating member 52 is a member that rotates integrally with the carrier C, and has first output gear teeth 52a and second output gear teeth 52b.

A third rotating member 53 that functions as an output portion of the planetary gear device 24 is connected to the ring gear R. As shown in FIG. The third rotating member 53 is a member that rotates integrally with the ring gear R, and has first output gear teeth 53a and second output gear teeth 53b.

Motor 30 is a motor generator (MG) capable of functioning as an electric motor and a generator. The motor 30 includes a rotor, a stator, and an output shaft that rotates together with the rotor, and is electrically connected to a battery via an inverter. As shown in FIG. 2, the output shaft of the motor 30 is provided with a reduction gear 31 . The reduction gear 31 meshes with the counter gear 32 . This counter gear 32 meshes with the input gear 33 . A reduction gear train is formed by the reduction gear 31 , the counter gear 32 and the input gear 33 . Therefore, when the power output from the motor 30 is transmitted to the input gear 33 via the counter gear 32, the rotation of the motor 30 is changed (reduced) and transmitted to the sun gear S.

The connection switching device 40 is a device that switches the connection state of the rotating member that constitutes the transfer 12 . Specifically, the connection switching device 40 selectively switches connection destinations of the first rotating member 51 , the second rotating member 52 , and the third rotating member 53 that rotate integrally with each rotating element of the planetary gear device 24 . As shown in FIG. 2 , the connection switching device 40 includes a first dog clutch 41 , a second dog clutch 42 and a third dog clutch 43 .

The first dog clutch 41 is an engagement device that functions as an input switching section and a shift switching section. As shown in FIG. 2 , the first dog clutch 41 selectively connects the input shaft 21 to the sun gear S or the rear wheel side output shaft 22 . The first dog clutch 41 is a so-called high-low switching section (speed change switching section), and has a speed change state in which the rotation of the input shaft 21 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22, and the rotation of the input shaft 21 is changed. is directly connected to the rear wheel side output shaft 22 without shifting. That is, the first dog clutch 41 transmits the power from the engine 2 to the rear wheel side output shaft 22 without passing through the planetary gear device 24 in the first input state, and transmits the power from the engine 2 to the planetary gear device 24. 2nd input state which transmits to the rear-wheel side output shaft 22 via.

The first dog clutch 41 has a first switching sleeve 44 as an input switching member. The first switching sleeve 44 includes a first gear tooth 44a that meshes with the gear tooth 21a of the input shaft 21, and a second gear tooth 44a that meshes with the first gear tooth 22a of the rear-wheel-side output shaft 22 or the input gear tooth 51a of the first rotating member 51. and gear teeth 44b. The first switching sleeve 44 is axially moved by the actuator of the first dog clutch 41 . In the first switching sleeve 44, the first gear teeth 44a are always in mesh with the input shaft 21, and the meshing partner of the second gear teeth 44b is either the rear wheel side output shaft 22 or the first rotating member 51. It switches to be either one. When the second gear tooth 44b meshes with the input gear tooth 51a of the first rotating member 51, the first dog clutch 41 is in a speed change state (second input state). On the other hand, when the second gear tooth 44b meshes with the first gear tooth 22a of the rear-wheel output shaft 22, the first dog clutch 41 is directly connected (first input state).

The second dog clutch 42 is an engaging device that functions as a shift switching section and a distribution switching section. The second dog clutch 42 serves as a gear changeover portion to selectively fix the ring gear R of the planetary gear device 24 to the fixed member 29 and to connect the carrier C and the ring gear R so as to rotate integrally. The second dog clutch 42 has a function of connecting the carrier C, which is an output element, to the transmission section 25 as a distribution switching section. That is, the second dog clutch 42 has three states: a fixed state (transmission state) in which the ring gear R is mechanically fixed; an integrated state in which the carrier C and the ring gear R are integrated; Switching between distributed states (differential states). The fixed member 29 is the transfer case 20 itself or a non-rotating member integrated with the transfer case 20 .

The second dog clutch 42 has a second switching sleeve 45 as a second distribution switching member. The second switching sleeve 45 includes a first gear tooth 45a that meshes with a first output gear tooth 52a of a second rotating member 52 that rotates integrally with the carrier C, and a first output gear of a third rotating member 53 that rotates integrally with the ring gear R. It has a second gear tooth 45b that meshes with the tooth 53a or the first input gear tooth 25a of the transmission part 25, and a third gear tooth 45c that meshes with the fixed member 29. The second switching sleeve 45 is axially moved by the actuator of the second dog clutch 42 . The second switching sleeve 45 connects the integrated state in which the carrier C and the ring gear R are rotatably connected together, the fixed state in which the ring gear R is connected to the fixing member 29, and the carrier C and the transmission portion 25. Toggles between distributed states.

The third dog clutch 43 is an engagement device that functions as a distribution switching unit. The third dog clutch 43 selectively connects the rear wheel side output shaft 22 to the front wheel 3 side transmission portion 25 . That is, the third dog clutch 43 has a distribution state in which part of the power transmitted to the rear-wheel output shaft 22 is distributed to the front-wheel output shaft 23, and a distribution state in which a part of the power transmitted to the rear-wheel-side output shaft 22 is distributed to the front-wheel-side output shaft 22. It switches to a non-distribution state in which no distribution is made to the axis 23 .

The third dog clutch 43 has a third switching sleeve 46 as a first distribution switching member. The third switching sleeve 46 has a first gear tooth 46a that meshes with the second gear tooth 22b of the rear-wheel-side output shaft 22, and a second gear tooth 46a that meshes with the second output gear tooth 52b of the second rotating member 52 that rotates integrally with the carrier C. It has gear teeth 46 b and third gear teeth 46 c that mesh with the second input gear teeth 25 b of the transmission portion 25 . The second gear teeth 46b and the third gear teeth 46c can mesh with the second output gear teeth 53b of the third rotating member 53 that rotates integrally with the ring gear R. The third switching sleeve 46 is axially moved by the actuator of the third dog clutch 43 . The third switching sleeve 46 connects the ring gear R or the carrier C to the rear-wheel output shaft 22 and selectively connects the rear-wheel output shaft 22 to the transmission portion 25 . That is, the third switching sleeve 46 switches between a non-distribution state in which the rear-wheel output shaft 22 and the transmission portion 25 are not connected and a distribution state in which the rear-wheel output shaft 22 and the transmission portion 25 are connected.

Thus, the connection switching device 40 functions as an input switching section, a shift switching section, and a distribution switching section. The input switching unit has a direct connection state (first input state) in which the input shaft 21 is directly connected to the rear wheel side output shaft 22, and a speed change state (second input state) in which the input shaft 21 is connected to the sun gear S of the planetary gear device 24. switch between Since this input switching section is a high-low switching section, it is included in the shift switching section. The gear changeover section has a gear change state in which the rotation of the input shaft 21 is changed and transmitted to the rear wheel side output shaft 22, and a non-change state in which the rotation of the input shaft 21 is not changed and transmitted to the rear wheel side output shaft 22. switch. The distribution switching unit has a non-distribution state (two-wheel drive state) in which the power input from the input shaft 21 is transmitted only to the rear wheels 4, and a state in which the power input from the input shaft 21 is transmitted to the front wheels 3 and the rear wheels 4. It switches between a distribution state (four-wheel drive state) in which transmission is distributed.

The transfer 12 establishes either the high-speed gear stage Hi or the low-speed gear stage Lo by causing the planetary gear device 24 to function as a transmission unit, and transmits the rotation from the transmission 11 to the rear stage. be able to. Further, when the transfer 12 is in the four-wheel drive state, the differential state in which the rotational differential between the rear propeller shaft 14 and the front propeller shaft 13 is not limited and the rotational differential between them is limited. Switch to and from the non-differential state. That is, when the transfer 12 is in the distributed state, the rear-wheel output shaft 22 and the transmission portion 25 are in a differential state, and the rear-wheel output shaft 22 and the transmission portion 25 are in a non-differential state. and can be switched.

Further, as shown in FIG. 1 , the vehicle 1 has an electronic control unit 100 that controls the vehicle 1 . The electronic control unit 100 outputs a command signal to an actuator that operates the connection switching device 40 to control the operation of the connection switching device 40 . For example, the electronic control unit 100 includes a microcomputer having a CPU, RAM, ROM, input/output interfaces, and the like. The CPU executes various controls of the vehicle 1 by performing signal processing according to a program stored in advance in the ROM while using the temporary storage function of the RAM.

Signals from various sensors mounted on the vehicle 1 are input to the electronic control unit 100 . For example, an engine speed sensor, a motor rotation angle sensor, a vehicle speed sensor, an accelerator opening sensor, a Hi range selection switch for selecting the high speed gear stage Hi by the driver's operation, and four-wheel drive state by the driver's operation. A sensor signal from the 4WD selection switch for selection is input to the electronic control unit 100 . The electronic control unit 100 executes drive control and the like of the vehicle 1 based on the input sensor signal. The electronic control unit 100 outputs a command signal for controlling the engine 2, a command signal for controlling the transmission 11, a command signal for controlling the transfer 12, and the like. The command signal for controlling the transfer 12 includes a command signal for controlling the motor 30 and a command signal for controlling the connection switching device 40 . In short, the transfer 12 can be switched between a plurality of drive states by the planetary gear device 24 and the connection switching device 40 .

Therefore, when controlling the driving state of the transfer 12, the electronic control unit 100 controls the operation of the motor 30, which is the second power source, and also controls the connection state of the connection switching device 40, so that the planetary gear device 24 to control the operating state of The planetary gear device 24 is switched between a first mode (first operating state), a second mode (second operating state), and a third mode (third operating state).

The third mode is an operating state in which two of the three rotating elements included in the planetary gear device 24 are connected to each other and one of the rotating elements is connected to the rear wheel side output shaft 22 . In the first mode, any one of the three rotating elements included in the planetary gear device 24 is connected to the input shaft 21 and one of the remaining rotating elements is fixed to the fixed member 29. and the other is connected to the rear-wheel-side output shaft 22 . The second mode is an operating state in which the three rotating elements included in the planetary gear device 24 are connected to the motor 30, the rear wheel output shaft 22, and the front wheel output shaft 23, respectively.

In this manner, the planetary gear device 24 functions as a transmission section, and also functions as a transmission switching section and a distribution switching section. That is, in the transfer 12, the configuration including the connection switching device 40 and the planetary gear device 24 functions as an input switching unit, a shift switching unit, and a distribution switching unit, thereby switching between a plurality of driving states. The transfer 12 of the first embodiment can be set to a first drive state, a second drive state, a third drive state, a fourth drive state, and a fifth drive state.

Here, the first to fifth drive states will be described with reference to FIGS. 2 to 11. FIG. 3, 5, 7, 9, and 11 show nomographic charts showing the rotation state of the planetary gear device 24, where the motor 30 is "MG" and the engine 2 is "ENG". , the sun gear S is "S", the carrier C is "C", the ring gear R is "R", and the second dog clutch 42 is "CL1".

First, the first drive state will be described with reference to FIGS. 2 and 3. FIG. The first drive state is a two-wheel drive state in which power is transmitted only to the rear wheels 4 of the front and rear wheels, and the connection switching device 40 is in the non-distribution state and the planetary gear device 24 is in the speed change state. In the first driving state, the power of the engine 2 and the motor 30 can be transmitted to the rear wheels 4, and two-wheel drive is possible while the rotation of the engine 2 is not decelerated by the transfer 12.

As shown in FIG. 2, when the transfer 12 is in the first driving state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the direct connection state of the first dog clutch 41. , and the third dog clutch 43 is in the non-distribution state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22 . The second switching sleeve 45 meshes with the third rotating member 53 and the fixed member 29 . The third switching sleeve 46 meshes with the second rotating member 52 and the rear wheel side output shaft 22 .

As described above, in the first drive state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without passing through the planetary gear device 24. It is transmitted to shaft 22 . Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without being changed. On the other hand, the motor 30 is connected to the rear wheel side output shaft 22 via a planetary gear device 24 in a speed change state. Therefore, in the first drive state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22, as shown in FIG. will be transmitted to Further, in the first drive state, an EV travel mode in which the vehicle 1 travels only with the power of the motor 30 is possible.

Next, the second drive state will be described with reference to FIGS. 4 and 5. FIG. The second drive state is a two-wheel drive state in which power is transmitted only to the rear wheels 4 of the front and rear wheels, and the connection switching device 40 is in the non-distribution state and the planetary gear device 24 is in the non-shift state. . In the second driving state, the power of the engine 2 and the motor 30 can be transmitted to the rear wheels 4, and two-wheel drive is possible while the rotation of the engine 2 is not decelerated by the transfer 12.

As shown in FIG. 4, when the transfer 12 is in the second driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40 is in the first dog clutch. 41 is in a direct connection state, and the third dog clutch 43 is in a non-distribution state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22 . The second switching sleeve 45 meshes with the second rotating member 52 and the third rotating member 53 . The third switching sleeve 46 meshes with the second rotating member 52 and the rear wheel side output shaft 22 .

Thus, in the second drive state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without passing through the planetary gear device 24. It is transmitted to shaft 22 . Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without being changed. Also, although the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24, the planetary gear device 24 is in a non-transmission state. Therefore, in the second drive state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22, the three rotating elements have the same rotation speed as shown in FIG.

Next, the third drive state will be described with reference to FIGS. 6 and 7. FIG. The third drive state is a four-wheel drive state in which power is transmitted to the front wheels 3 and the rear wheels 4, in which the connection switching device 40 is in the distributed state and the planetary gear device 24 is in the distributed state (differential state). is the case. In the third driving state, the motor torque output from the motor 30 enables front/rear distribution control. The third drive state is a so-called torque split 4WD mode. The purpose of the torque split mode is to generate driving force in the front wheels 3 by the power of the motor 30 and to change the distribution of the power transmitted to the transmission section 25 and the rear wheel side output shaft 22 .

As shown in FIG. 6, when the transfer 12 is in the third driving state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially operated, and the connection switching device 40 is in the first dog clutch. 41 is in the direct connection state, the second dog clutch 42 is in the distributing state, and the third dog clutch 43 is in the distributing state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22 . The second switching sleeve 45 meshes with the second rotating member 52 and the transmission portion 25 . The third switching sleeve 46 meshes with the third rotating member 53 and the rear wheel side output shaft 22 . When the third rotating member 53 and the rear-wheel output shaft 22 are connected by the third switching sleeve 46 in this way, the first gear teeth 46 a of the third switching sleeve 46 are connected to the second gear teeth of the rear-wheel output shaft 22 . 22 b , and the second gear teeth 46 b of the third switching sleeve 46 mesh with the second output gear teeth 53 b of the third rotating member 53 .

Thus, in the third driving state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without passing through the planetary gear device 24. It is transmitted to shaft 22 . Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without being changed. Further, since the planetary gear device 24 is in a distribution state in which differential is possible, the power of the motor 30 is distributed and transmitted to the transmission portion 25 and the rear wheel side output shaft 22 via the planetary gear device 24 . Therefore, in the third drive state, as shown in FIG. 7, the torque output from the motor 30 can control the distribution of the power transmitted to the front wheels and the rear wheels.

Next, the fourth drive state will be described with reference to FIGS. 8 and 9. FIG. The fourth drive state is a four-wheel drive state in which power is transmitted to the front wheels 3 and the rear wheels 4, in which the connection switching device 40 is in the distribution state and the planetary gear device 24 is in the non-shift state. In the fourth driving state, the fixed distribution 4WD mode is possible while the rotation of the engine 2 is not decelerated by the transfer 12 . The fourth drive state is the Hi mode in which the transfer 12 is set to the high speed gear stage Hi.

As shown in FIG. 8, when the transfer 12 is in the fourth driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40 is in the first dog clutch. 41 is in a direct connection state, and the third dog clutch 43 is in a distributing state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the rear wheel side output shaft 22 . The second switching sleeve 45 meshes with the second rotating member 52 and the third rotating member 53 . The third switching sleeve 46 meshes with the second rotating member 52 or the third rotating member 53 , the rear-wheel-side output shaft 22 , and the transmission portion 25 . When the rear-wheel-side output shaft 22 and the transmission portion 25 are connected by the third switching sleeve 46 in this manner, the second gear teeth 46 b of the third switching sleeve 46 are connected to the second output gear teeth of the second rotating member 52 . Either one of 52b and the second output gear teeth 53b of the third rotating member 53 may be meshed.

Thus, in the fourth drive state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without passing through the planetary gear device 24. It is transmitted to shaft 22 . Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without being changed. Also, although the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24, the planetary gear device 24 is in a non-transmission state. Therefore, in the fourth driving state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22, the three rotating elements have the same rotation speed as shown in FIG.

Next, the fifth drive state will be described with reference to FIGS. 10 and 11. FIG. The fifth driving state is a four-wheel drive state in which power is transmitted to the front wheels 3 and the rear wheels 4, and is set by the connection switching device 40 being in the distributing state and the planetary gear unit 24 being in the speed change state. . In the fifth driving state, a fixed distribution 4WD mode in which the rotation of the engine 2 is reduced by the transfer 12 is possible. The fifth drive state is the Lo mode in which the transfer 12 is set to the low speed gear stage Lo. That is, in the fifth driving state, the rear wheels 4 can be driven by the motor 30 even in the Lo mode.

As shown in FIG. 10 , when the transfer 12 is in the fifth drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 switches the first dog clutch 41 to the second input state. state (shift state), and the third dog clutch 43 is in the distributing state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the first rotating member 51 . The second switching sleeve 45 meshes with the third rotating member 53 and the fixed member 29 . The third switching sleeve 46 meshes with the second rotating member 52 and the rear wheel side output shaft 22 .

Thus, in the fifth driving state, the input shaft 21 is connected to the first rotating member 51, so that the power transmitted from the engine 2 to the input shaft 21 is transmitted to the rear wheel side output shaft 22 via the planetary gear device 24. transmitted. Further, since the planetary gear device 24 is in a speed change state, the rotation of the input shaft 21 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22 . Similarly, the motor 30 is also connected to the rear wheel side output shaft 22 via a planetary gear device 24 in a speed change state. Therefore, in the fifth driving state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22, as shown in FIG. will be transmitted to

As described above, according to the first embodiment, the motor 30 is always connected to a rotating element other than the rotating element fixed to the fixed member 29 among the three rotating elements included in the planetary gear device 24 . Therefore, even when the planetary gear device 24 is in a speed change state in which one rotating element is fixed to the fixed member 29 , the power of the motor 30 can be transmitted to the rear wheel side output shaft 22 . As a result, when the planetary gear device 24 is in a shift state, the power of the motor 30 can be added to the power of the engine 2 and transmitted to the rear wheels 4 . Further, when the planetary gear device 24 is in a speed change state, the rotation of the motor 30 can be changed by the planetary gear device 24 and transmitted to the rear wheels 4 .

As a modification of the above-described first embodiment, the planetary gear device 24 may be configured by a double pinion type planetary gear device. When the transfer 12 has a double pinion type planetary gear device, the motor 30 is always connected to the sun gear S, the rotating element selectively fixed to the fixed member 29 is the carrier C, and the rotating element that functions as the output element is It becomes the ring gear R.

As another modified example, the input shaft 21 may be configured to be constantly connected to the sun gear S of the planetary gear device 24 . In this case, the first dog clutch 41 switches between an engaged state in which the input shaft 21 is directly connected to the rear-wheel output shaft 22 and a released state in which the input shaft 21 is disconnected from the rear-wheel output shaft 22 .

As another modified example, when the three rotating elements of the planetary gear device 24 rotate together in the third mode, the case is not limited to the case where the carrier C and the ring gear R are coupled so as to rotate together. In other words, there is no particular limitation on the two rotating elements that are connected so as to be rotatable together. Furthermore, all three rotating elements may be connected so as to be rotatable together.

As another modification, any of the three rotating elements of the planetary gear device 24 in the first mode may be fixed to the fixing member 29 as long as it is not the input element. For example, the carrier C may be used as a fixed element for fixing to the fixed member 29, and the ring gear R may be used as an output element. In short, it suffices to fix one rotating element of the planetary gear device 24 with respect to the input from the input shaft 21 and to provide a rotational speed difference between the input element and the output element. In the above-described embodiment, the sun gear S is an input element, the carrier C is an output element, and the ring gear R is a fixed element as a combination that enables the most deceleration.

In the above-described embodiment, the sun gear S is used as the input element and the carrier C is used as the output element as the combination that maximizes power transmission to the front wheels in the second mode, but other combinations are also possible. For example, in the third mode, the ring gear R may be the input element and the carrier C may be the output element. Note that the configuration in which the motor 30 is connected to the carrier C when the planetary gear device 24 is of the single pinion type, or the configuration in which the motor 30 is connected to the ring gear R when the planetary gear device 24 is of the double pinion type does not cause a torque split. Since it cannot be done, it is not included in the present invention.

Further, as another modification, the engagement devices constituting the connection switching device 40 only need to realize the connection state of the first mode, the second mode, and the third mode. ) can be freely selected. The above-described embodiment is a configuration example in which all connection states can be realized with three dog clutches for miniaturization.

Also, the motor 30 may be connected to any rotating element other than the fixed element as long as the configuration allows the motor to be driven in the Lo mode. In addition, the arrangement of the motor 30, presence/absence of deceleration at the time of connection (reduction gear 31, etc.), addition of a transmission mechanism to the motor 30, and the like are not particularly limited. It can be appropriately selected depending on the specifications of the vehicle 1 and the motor 30 . The embodiment described above is an example in which the rotation of the engine 2 and the rotation of the motor 30 can be simultaneously reduced by the planetary gear device 24 in the Lo mode, and the reduction function can be shared in the two-wheel drive state. This is an example of a configuration in which the motor is connected to S and the variable speed function of the motor alone is omitted.

Next, the power transmission device of the second embodiment will be explained. In the second embodiment, unlike in the first embodiment, when the three rotating elements of the planetary gear device 24 are differential, the output element for outputting power to the front wheels 3 is the ring gear R. . In addition, in the description of the second embodiment, the same reference numerals as those of the first embodiment are used, and the description thereof is omitted.

FIG. 12 is a skeleton diagram that schematically shows a transfer in the power transmission device of the second embodiment. In the transfer 12 of the second embodiment, the carrier C of the planetary gear device 24 is always connected to the rear wheel side output shaft 22 . The carrier C and the rear wheel side output shaft 22 are connected so as to rotate integrally.

The connection switching device 40 includes a first dog clutch 41 , a second dog clutch 42 , a third dog clutch 43 , a first friction clutch 47 and a second friction clutch 48 .

The second dog clutch 42 selectively fixes the ring gear R to the fixed member 29 . The second switching sleeve 45 of the second dog clutch 42 is in constant mesh with the first output gear teeth 53 a of the third rotating member 53 . The second switching sleeve 45 is axially moved by the actuator of the second dog clutch 42 to switch between an engaged state in which it meshes with the fixed member 29 and a released state in which it does not mesh with the fixed member 29 .

The third dog clutch 43 switches between a first distribution state in which the ring gear R is connected to the transmission portion 25 and a second distribution state in which the rear-wheel-side output shaft 22 is connected to the transmission portion 25 . The third switching sleeve 46 of the third dog clutch 43 is moved in the axial direction by the actuator of the third dog clutch 43 , and is engaged with the third rotating member 53 and the transmission portion 25 without meshing with the rear-wheel-side output shaft 22 . It switches between a first distribution state in which they mesh and a second distribution state in which they mesh with the rear-wheel-side output shaft 22 and the transmission portion 25 without meshing with the third rotating member 53 .

The first friction clutch 47 is a friction engagement device that selectively fixes the ring gear R to the fixed member 29, and is hydraulically operated by a hydraulic actuator. The first friction clutch 47 has a fixed-side first friction engagement element and a rotation-side second friction engagement element that rotates integrally with the ring gear R, and an engagement force is generated by hydraulic pressure. In other words, the engaging force of the first friction clutch 47 can be controlled by controlling the hydraulic pressure. When the first friction clutch 47 is engaged, the ring gear R becomes non-rotatable, and when the first friction clutch 47 is released, the ring gear R becomes rotatable.

For example, when fixing the ring gear R to the fixed member 29, the first friction clutch 47 is switched from the released state to the engaged state while the second dog clutch 42 is released. Then, while keeping the first friction clutch 47 in the engaged state, the second dog clutch 42 is switched from the released state to the engaged state. After that, when the second dog clutch 42 is engaged, the first friction clutch 47 can be released. As a result, the ring gear R can be fixed by a mechanical force without supplying hydraulic pressure for generating an engaging force to the second friction clutch 48 .

The second friction clutch 48 is a friction engagement device that selectively engages the ring gear R and the carrier C, and is hydraulically operated by a hydraulic actuator. The second friction clutch 48 has a rotating-side first frictional engagement element that rotates integrally with the ring gear R and a rotating-side second frictional engagement element that rotates integrally with the carrier C. The engagement force is applied by hydraulic pressure. occur. The engagement force of the second friction clutch 48 can also be controlled by controlling the hydraulic pressure. When the second friction clutch 48 is engaged, the carrier C and the ring gear R are connected so as to rotate integrally, and when the second friction clutch 48 is released, the carrier C becomes rotatable relative to the ring gear R.

Further, as shown in FIG. 12, when the transfer 12 of the second embodiment is in the third driving state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially connected. The switching device 40 puts the first dog clutch 41 in the direct connection state, the second dog clutch 42 in the released state, the third dog clutch 43 in the first distribution state, the first friction clutch 47 in the released state, and the second friction clutch 48 in the released state. That is, the second switching sleeve 45 does not mesh with the fixed member 29 . As described above, in the third driving state of the second embodiment, the planetary gear device 24 is differentially movable, and the power of the motor 30 is transmitted from the ring gear R to the transmission portion 25 via the planetary gear device 24 .

In the above-described second embodiment, the configuration including the second dog clutch 42 has been described, but a configuration without the second dog clutch 42 may be employed as a modification of the second embodiment. Moreover, it is possible to apply the modification of 1st Embodiment mentioned above to 2nd Embodiment.

Next, the power transmission device of the third embodiment will be described. In the third embodiment, the input shaft 21 is always connected to the sun gear S, and the motor 30 is always connected to the ring gear R, unlike the first and second embodiments. In addition, in the description of the third embodiment, the same reference numerals as those of the first embodiment and the second embodiment are used, and the description thereof is omitted.

FIG. 13 is a skeleton diagram that schematically shows the transfer in the power transmission device of the third embodiment. In the transfer 12 of the third embodiment, the sun gear S is always connected to the input shaft 21 . The sun gear S and the input shaft 21 are connected so as to rotate together. Further, the ring gear R is always connected to a motor 30 .

The connection switching device 40 includes a second dog clutch 42 , a third dog clutch 43 , a first friction clutch 47 and a second friction clutch 48 . That is, in the third embodiment, the above-described first dog clutch 41 is not provided. Note that the second friction clutch 48 is the same as that of the second embodiment, so description thereof will be omitted.

The second dog clutch 42 switches the connection relationship between the planetary gear device 24 and the transmission portion 25 and selectively connects the transmission portion 25 to the carrier C or the ring gear R. The second switching sleeve 45 of the second dog clutch 42 is a switching member that meshes with the second rotating member 52, the third rotating member 53, and the transmission portion 25, and is in a distribution state in which the carrier C and the transmission portion 25 are connected. , and a distributed state in which the ring gear R and the transmission portion 25 are connected.

The third dog clutch 43 switches the connection relationship between the input shaft 21 , the rear-wheel-side output shaft 22 and the transmission portion 25 . The third dog clutch 43 switches between a direct connection state in which the input shaft 21 and the rear-wheel output shaft 22 are directly connected, and a shift state in which the transmission portion 25 is connected to the rear-wheel output shaft 22 . A third switching sleeve 46 of the third dog clutch 43 meshes with the input shaft 21 , the rear-wheel-side output shaft 22 , and the transmission portion 25 . The third switching sleeve 46 is moved in the axial direction by the actuator of the third dog clutch 43 to be directly connected to the input shaft 21 and the rear wheel side output shaft 22 and to be in mesh with the rear wheel side output shaft 22 and the transmission portion 25 . It switches between the speed change state.

The first friction clutch 47 is a friction engagement device that selectively fixes the carrier C to the fixed member 29, and is hydraulically operated by a hydraulic actuator. The first friction clutch 47 has a fixed-side first frictional engagement element and a rotating-side second frictional engagement element that rotates integrally with the carrier C, and an engagement force is generated by hydraulic pressure. When the first friction clutch 47 is engaged, the carrier C becomes non-rotatable, and when the first friction clutch 47 is released, the carrier C becomes rotatable.

Further, as shown in FIG. 13, when the transfer 12 of the third embodiment is in the third driving state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially connected. In the switching device 40, the second dog clutch 42 is in the distributed state, the third dog clutch 43 is in the non-distributed state, the first friction clutch 47 is in the released state, and the second friction clutch 48 is in the released state. That is, the second switching sleeve 45 meshes with the second rotating member 52 and the transmission portion 25 . The third switching sleeve 46 meshes with the input shaft 21 and the rear wheel side output shaft 22 . Thus, in the third driving state of the third embodiment, the planetary gear device 24 can be differentially driven, and the power of the motor 30 is transmitted from the carrier C to the transmission section 25 .

As a modification of the above-described third embodiment, a dog clutch that selectively connects the carrier C to the fixed member 29 may be provided. The modified example of the first embodiment described above can be applied to the third embodiment.

Next, a power transmission device of a fourth embodiment will be described. In the fourth embodiment, unlike the first embodiment, the third dog clutch 43 is configured to function also as an input switching section. In addition, in the description of the fourth embodiment, the same reference numerals as those of the first embodiment are used, and the description thereof is omitted.

FIG. 14 is a skeleton diagram that schematically shows the transfer in the power transmission device of the fourth embodiment. In the transfer 12 of the fourth embodiment, the third dog clutch 43 can selectively connect the input shaft 21 and the rear wheel side output shaft 22 .

The first dog clutch 41 switches between a shifting state (engaged state) in which the input shaft 21 and the sun gear S are connected and a non-shifting state (released state) in which the input shaft 21 and the sun gear S are not connected.

The third dog clutch 43 switches connection relationships between the input shaft 21 , the rear-wheel-side output shaft 22 , the carrier C, the ring gear R, and the transmission portion 25 . The third switching sleeve 46 of the third dog clutch 43 has a first non-distribution state in which it meshes with the input shaft 21, the second rotating member 52, and the rear-wheel output shaft 22; It switches between a second non-distribution state in which the wheel-side output shaft 22 is engaged and a distribution state in which the second rotating member 52 , the rear-wheel-side output shaft 22 and the transmission portion 25 are engaged. The third switching sleeve 46 further has a fourth gear tooth 46d. The fourth gear tooth 46 d meshes with the gear tooth 21 b of the input shaft 21 .

Further, as shown in FIG. 14, when the transfer 12 of the fourth embodiment is in the fifth driving state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first mode. The first dog clutch 41 is in a speed change state (engaged state), and the third dog clutch 43 is in a distributing state. That is, the first switching sleeve 44 meshes with the input shaft 21 and the first rotating member 51 . The second switching sleeve 45 meshes with the third rotating member 53 and the fixed member 29 . The third switching sleeve 46 meshes with the second rotating member 52 , the rear wheel side output shaft 22 and the transmission portion 25 .

In addition, it is possible to apply the modification of 1st Embodiment mentioned above to 4th Embodiment.

In addition, in the first embodiment, since EV traveling with two-wheel drive is possible, the rotation of the motor 30 is changed by the transfer 12 by executing the EV traveling mode when the transfer 12 is in the first drive state. is transmitted to the rear wheels 4. Furthermore, in the first embodiment, the EV running mode can be implemented when the transfer 12 is in the second drive state. That is, by implementing the EV driving mode when the transfer 12 is in the second drive state, the rotation of the motor 30 is transmitted to the rear wheels 4 without being decelerated by the transfer 12 . In the first embodiment, the rear wheels 4 are the first driving wheels and the front wheels 3 are the second driving wheels.

Further, in the first embodiment, the second dog clutch 42 is a fixed switching portion that selectively connects any one of the three rotating elements of the planetary gear device 24 to the fixed member 29 . That is, the connection switching device 40 has a fixed switching unit. Then, the fixation switching portion switches between a fixed state in which the third rotating element is connected to the fixing member 29 and an unfixed state in which the third rotating element is rotatably released.

Further, in the first embodiment, when the transfer 12 is in the fourth embodiment and the fifth driving state, the third switching sleeve 46 is connected with the transmission portion 25 . On the other hand, when the transfer 12 is in the first driving state, the second driving state, and the third driving state, the third switching sleeve 46 is not connected to the transmission portion 25 . Furthermore, when the transfer 12 is in the third drive state, the second switching sleeve 45 is connected to the transmission portion 25 . On the other hand, when the transfer 12 is in the first drive state, the second drive state, the fourth drive state, and the fifth drive state, the second switching sleeve 45 is not connected to the transmission portion 25 .

Further, in the first embodiment, the connection switching device 40 selectively switches the connection relationship between the input shaft 21, the rear wheel side output shaft 22, the front wheel side output shaft 23, the sun gear S, the carrier C, and the ring gear R. The input switching unit switches the connection destination of the input shaft 21 . Also, the distribution switching unit selectively connects the rear wheel side output shaft 22 to the carrier C or the ring gear R. This distribution switching unit switches between a first connection state in which the rear-wheel output shaft 22 is connected to the carrier C and a second connection state in which the rear-wheel output shaft 22 is connected to the ring gear R. Furthermore, the distribution switching unit can switch to a third connection state in which the rear-wheel-side output shaft 22 is connected to the carrier C and the ring gear R.

More specifically, the distribution switching unit includes a first distribution switching member that selectively connects the rear wheel output shaft 22 to the carrier C or the ring gear R, and a second distribution switching member that selectively connects the carrier C and the ring gear R. and a switching member. The first distribution switching member switches among a first connection state, a second connection state, and a third connection state. The second distribution switching member switches between a fourth connection state in which the carrier C and the ring gear R are connected and a fifth connection state in which the carrier C and the ring gear R are not connected. That is, the third dog clutch 43 and the third switching sleeve 46 are switched among the first connected state, the second connected state and the third connected state. The second dog clutch 42 and the second switching sleeve 45 are switched between the fourth connected state and the fifth connected state.

Further, as in the second embodiment and the third embodiment, in the configuration in which the connection switching device 40 includes the second friction clutch 48 and the second friction clutch 48 selectively engages the ring gear R and the carrier C, The second friction clutch 48 functions as a second distribution switching member. That is, as shown in FIG. 12, in the second embodiment, the third dog clutch 43 and the third switching sleeve 46 are switched between the first connected state and the second connected state. Then, the second friction clutch 48 switches between the fourth connected state and the fifth connected state.

Next, the power transmission device of the fifth embodiment will be explained. In the fifth embodiment, unlike the first embodiment, the power transmission device 10 is configured to be capable of two-wheel drive traveling in which only the front wheels 3 are driven wheels in the EV traveling mode. In addition, in the description of the fifth embodiment, the same reference numerals as those of the first embodiment are used, and the description thereof is omitted.

The vehicle 1 of the fifth embodiment includes a power transmission device 10 capable of two-wheel drive traveling in which the front wheels 3 are driving wheels and the rear wheels 4 are driven wheels during the EV driving mode. The front wheels 3 serve as drive wheels during two-wheel drive running in the EV running mode and during four-wheel drive running. The rear wheels 4 serve as driven wheels during two-wheel drive travel in the EV travel mode, and serve as drive wheels during four-wheel drive travel. In this fifth embodiment, the rear wheels 4 are the first drive wheels and the front wheels 3 are the second drive wheels.

FIG. 15 is a skeleton diagram that schematically shows the transfer in the power transmission device of the fifth embodiment. In the transfer 12 of the fifth embodiment, the carrier C of the planetary gear device 24 is always connected to the transmission portion 25, which is the input portion on the front wheel side. The carrier C and the transmission part 25 are connected so as to rotate integrally. That is, the carrier C is always connected to the front wheel side output shaft 23 so as to be able to transmit power.

The motor 30 is arranged on the same axis as the input shaft 21 and the rear-wheel-side output shaft 22 and configured to rotate together with the first rotating member 51 . The motor 30 has a rotor 30 a attached to the first rotating member 51 . The rotor 30a is connected to the sun gear S so as to rotate integrally therewith. Therefore, the rotor 30a, the first rotating member 51, and the sun gear S rotate together.

The second dog clutch 42 selectively fixes the ring gear R to the fixed member 29 . That is, the second dog clutch 42 is a fixed switching portion. A second switching sleeve 45 of the second dog clutch 42 is in constant mesh with the fixed member 29 . The second switching sleeve 45 is positioned between an engaged state (fixed state) in which it meshes with the first output gear teeth 53a of the third rotating member 53 and a released state (non-fixed state) in which it does not mesh with the first output gear teeth 53a. to switch.

The third dog clutch 43 switches the connection relationship between the rear-wheel-side output shaft 22, the carrier C, and the ring gear R. The third dog clutch 43 has a first non-distribution state (sixth connection state) in which the rear-wheel-side output shaft 22 is not connected to the ring gear R and the carrier C, and a second non-distribution state (seventh connection state) in which the ring gear R is connected to the carrier C. connected state), a first distribution state (second connection state) in which the rear-wheel output shaft 22 is connected to the ring gear R, and a second distribution state (second connection state) in which the rear-wheel output shaft 22 is connected to the ring gear R and the carrier C. 3 connection state) and a third distribution state (first connection state) in which the rear-wheel-side output shaft 22 is connected to the carrier C. That is, the third dog clutch 43 of the fifth embodiment has a sixth connection state in which the rear-wheel-side output shaft 22 is not connected to the ring gear R and the carrier C, and a seventh connection state in which the ring gear R is connected to the carrier C as a distribution switching unit. It is possible to switch between states.

The third dog clutch 43 has a third switching sleeve 46 functioning as a first distribution switching member and a second distribution switching member. The third switching sleeve 46 includes a first gear tooth 46 a that meshes with the second gear tooth 22 b of the rear wheel side output shaft 22 and the second output gear tooth 53 b of the third rotating member 53 , and the second output of the second rotating member 52 . It has a gear tooth 52 b and a second gear tooth 46 b that meshes with the second output gear tooth 53 b of the third rotating member 53 and the second gear tooth 22 b of the rear wheel side output shaft 22 . The third switching sleeve 46 is in a first non-distributed state (sixth connected state) in which it meshes only with the rear-wheel output shaft 22 , and in a state in which it does not mesh with the rear-wheel output shaft 22 . A second non-distribution state (seventh connected state) in which the second rotating member 52 is meshed, and a first distribution state (second a second distributing state (third connection state) in which the rear-wheel-side output shaft 22, the third rotating member 53, and the second rotating member 52 are meshed; It switches between a third distribution state (first connection state) in which the side output shaft 22 and the second rotating member 52 are meshed. In other words, the third switching sleeve 46 of the fifth embodiment, as a distribution switching member, can be configured as a third rotary member in a sixth connection state in which it meshes only with the rear-wheel output shaft 22 and in a state in which it does not mesh with the rear-wheel output shaft 22 . 53 and a seventh connection state in which the second rotating member 52 is meshed. Since the third dog clutch 43 also functions as a second distribution switching member, the carrier C and the ring gear R are connected as the first distribution switching member in the first connection state, the third connection state, and the seventh connection state. If it does, it means that the second distribution switching member is in the fourth connection state. Similarly, when the third dog clutch 43 is in the second connection state as the first distribution switching member and in the sixth connection state, it is in the fifth connection state as the second distribution switching member.

Here, first to fifth drive states realized by the transfer 12 of the fifth embodiment will be described with reference to FIGS. 15 to 19. FIG.

First, referring to FIG. 15, the first driving state of the fifth embodiment will be described. The first drive state of the fifth embodiment is a two-wheel drive state in which power is transmitted only to the front wheels 3 of the front and rear wheels, in which the connection switching device 40 is in a non-distribution state and the planetary gear device 24 is in a speed change state. is the case. In this first drive state, the power of the motor 30 can be transmitted to the front wheels 3 while the engine 2 is stopped, and two-wheel drive is possible in which the rotation of the motor 30 is reduced by the transfer 12 .

As shown in FIG. 15, when the transfer 12 of the fifth embodiment is in the first driving state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first dog clutch. 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first non-distribution state (sixth connection state). That is, the second switching sleeve 45 meshes with the third rotating member 53 and the fixed member 29 . The third switching sleeve 46 meshes only with the rear wheel side output shaft 22 .

Thus, in the first driving state, the engine 2 is directly connected to the rear wheel output shaft 22, but the rear wheel output shaft 22 is not driven by the engine 2 while the engine 2 is stopped. On the other hand, the motor 30 is connected to the front wheel side output shaft 23 via the planetary gear device 24 in a speed change state. Therefore, in the first driving state, when the power of the motor 30 is transmitted to the front-wheel output shaft 23 , the rotation of the motor 30 is changed by the planetary gear device 24 and transmitted to the front-wheel output shaft 23 .

Next, referring to FIG. 16, the second driving state of the fifth embodiment will be described. The second drive state of the fifth embodiment is a two-wheel drive state in which power is transmitted only to the front wheels 3 of the front and rear wheels, in which the connection switching device 40 is in the non-distribution state and the planetary gear device 24 is in the non-transmission state. This is the case. In this second drive state, the power of the motor 30 can be transmitted to the front wheels 3 while the engine 2 is stopped, and two-wheel drive is possible while the rotation of the motor 30 is not decelerated by the transfer 12 .

As shown in FIG. 16, when the transfer 12 of the fifth embodiment is in the second driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40, the first dog clutch 41 is in the direct connection state, and the third dog clutch 43 is in the second non-distribution state (seventh connection state). That is, the second switching sleeve 45 does not mesh with the third rotating member 53 . The third switching sleeve 46 meshes with the second rotating member 52 and the third rotating member 53 .

Thus, in the second drive state, the engine 2 is directly connected to the rear wheel output shaft 22, but the rear wheel output shaft 22 is not driven by the engine 2 while the engine 2 is stopped. Also, although the motor 30 is connected to the front wheel side output shaft 23 via the planetary gear device 24, the planetary gear device 24 is in a non-transmission state. Therefore, in the second driving state, when the power of the motor 30 is transmitted to the front-wheel-side output shaft 23, the three rotating elements of the planetary gear device 24 have the same rotation speed. That is, the rotation of the motor 30 is transmitted to the front wheel side output shaft 23 without being changed by the planetary gear device 24 .

Next, referring to FIG. 17, the third driving state of the fifth embodiment will be described. As shown in FIG. 17, when the transfer 12 of the fifth embodiment is in the third driving state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially operated. 40, the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first distribution state (second connection state). That is, the second switching sleeve 45 does not mesh with the third rotating member 53 . The third switching sleeve 46 meshes with the third rotating member 53 and the rear wheel side output shaft 22 .

Next, referring to FIG. 18, a fourth driving state of the fifth embodiment will be described. As shown in FIG. 18, when the transfer 12 of the fifth embodiment is in the fourth driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are coupled so as to rotate integrally, and the connection switching device 40, the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the second distribution state (third connection state). That is, the second switching sleeve 45 does not mesh with the third rotating member 53 . The third switching sleeve 46 meshes with the second rotating member 52 , the third rotating member 53 and the rear wheel side output shaft 22 .

Next, referring to FIG. 19, a fifth driving state of the fifth embodiment will be described. First, in the fifth driving state of the fifth embodiment, the front wheels 3 can be driven by the motor 30 even in the Lo mode. Then, as shown in FIG. 19, when the transfer 12 of the fifth embodiment is in the fifth driving state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first mode. The first dog clutch 41 is in the second input state, the second dog clutch 42 is in the engaged state, and the third dog clutch 43 is in the third distribution state (first connection state). That is, the second switching sleeve 45 meshes with the fixed member 29 and the third rotating member 53 . The third switching sleeve 46 meshes with the rear wheel side output shaft 22 and the second rotating member 52 .

As described above, according to the fifth embodiment, the power transmission device 10 capable of driving only the front wheels 3 in the EV driving mode can also obtain the same effect as the first embodiment.

As a modification of the fifth embodiment, a friction engagement device that selectively couples the carrier C and the ring gear R may be provided. This modification is illustrated in FIGS. 20 and 21. FIG.

As shown in FIG. 20, in the transfer 12 according to the first modification of the fifth embodiment, the connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, a third dog clutch 43, a friction clutch 401, It has The hardware configuration of the friction clutch 401 is the same as that of the second friction clutch 48 of the second embodiment.

In this first modified example, the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first distribution state or the first non-distribution state. and the ring gear R rotate relative to each other, the friction clutch 401 can be switched between the engaged state and the released state.

For example, as shown in FIG. 20, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 connects the ring gear R and the rear wheel side output shaft. 22, the friction clutch 401 is engaged so that the transfer 12 is in the fourth drive state, and the friction clutch 401 is released so that the transfer 12 is in the third drive state. That is, in the first modification, the third drive state and the fourth drive state can be switched by changing the state of the friction clutch 401 without moving the third switching sleeve 46 in the axial direction by the actuator of the third dog clutch 43. Switching is possible. When the third drive state shifts to the fourth drive state by switching the friction clutch 401 from the released state to the engaged state, the third switching sleeve 46 is rotated while the friction clutch 401 remains engaged. direction to connect the third switching sleeve 46 to the second rotating member 52 , the third rotating member 53 , and the rear-wheel output shaft 22 . In this case, the friction clutch 401 may be switched from the engaged state to the released state after the third switching sleeve 46 transitions from the first distributed state to the second distributed state.

21, the first dog clutch 41 connects the input shaft 21 and the rear wheel output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 connects only the rear wheel output shaft 22. When it is connected, the friction clutch 401 is engaged and the transfer 12 is in the second drive state. That is, in the first modified example, the second drive state is realized by switching the friction clutch 401 from the released state to the engaged state without moving the third switching sleeve 46 in the axial direction by the actuator of the third dog clutch 43. It is possible to

Further, in the first modification, instead of the friction clutch 401, a dedicated dog clutch for selectively engaging the carrier C and the ring gear R may be provided. Furthermore, in this first modification, a dedicated friction engagement device for connecting the ring gear R to the fixed member 29 may be provided instead of the second dog clutch 42 .

Further, as a second modification of the fifth embodiment, in addition to a friction engagement device (friction clutch 401) that selectively connects the carrier C and the ring gear R, a friction clutch that selectively fixes the ring gear R to the fixed member 29 is provided. An engagement device may be provided. This second modification is illustrated in FIG.

As shown in FIG. 22, in the transfer 12 according to the second modification of the fifth embodiment, the connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, a third dog clutch 43, and a first friction clutch 47. and a second friction clutch 48 . The first friction clutch 47 is the same as the first friction clutch 47 of the second embodiment. The second friction clutch 48 has the same hardware configuration as the friction clutch 401 of the modified example.

In this second modification, the first dog clutch 41 is in the direct connection state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the first non-distribution state, so that the carrier C and the ring gear R in the planetary gear device 24 are connected. In the case of relative rotation, it is possible to switch between the engaged state and the disengaged state of the first friction clutch 47 and the second friction clutch 48 .

For example, as shown in FIG. 22, the first dog clutch 41 connects the input shaft 21 and the rear wheel output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 connects only the rear wheel output shaft 22. When connected, the first friction clutch 47 is in the engaged state and the second friction clutch 48 is in the disengaged state, whereby the transfer 12 is in the first driving state, and the first friction clutch 47 is in the disengaged state and the second friction clutch is in the disengaged state. 48 is in the engaged state, the transfer 12 is in the second driving state. That is, in the second modified example, the first driving state and the second driving state are obtained by changing the states of the first friction clutch 47 and the second friction clutch 48 without operating the second dog clutch 42 and the third dog clutch 43 . It is possible to switch between

Next, the power transmission device of the sixth embodiment will be described. In the sixth embodiment, unlike the fifth embodiment, the power transmission device 10 is configured so that the front-wheel-side output shaft 23 can be selectively separated from the carrier C. As shown in FIG. In addition, in the description of the sixth embodiment, the same reference numerals as those of the fifth embodiment are used, and the description thereof is omitted.

First, as in the first embodiment, the vehicle 1 of the sixth embodiment includes a power transmission device 10 capable of two-wheel drive traveling with the rear wheels 4 as driving wheels and the front wheels 3 as driven wheels during the EV driving mode. I have. In this sixth embodiment, the rear wheels 4 are the first drive wheels and the front wheels 3 are the second drive wheels.

FIG. 23 is a skeleton diagram that schematically shows a transfer in the power transmission device of the sixth embodiment. In the transfer 12 of the sixth embodiment, the carrier C of the planetary gear device 24 is not always connected to the front wheel side output shaft 23 . The carrier C and the front-wheel-side output shaft 23 are configured to be relatively rotatable.

The connection switching device 40 includes a first dog clutch 41 , a second dog clutch 42 , a third dog clutch 43 and a fourth dog clutch 402 . The third switching sleeve 46 of the third dog clutch 43 functions as a first distribution switching member and a second distribution switching member.

The fourth dog clutch 402 is an engaging device that functions as a distribution switching unit, and selectively connects the carrier C to the front-wheel output shaft 23 . The fourth dog clutch 402 has an eighth connection state (engagement state) in which the carrier C and the front-wheel output shaft 23 are connected, and a ninth connection state (disengagement state) in which the carrier C and the front-wheel output shaft 23 are disconnected. It is possible to switch to That is, the fourth dog clutch 402 has a distribution state in which part of the power transmitted to the rear-wheel output shaft 22 is distributed to the front-wheel output shaft 23, and a distribution state in which a part of the power transmitted to the rear-wheel output shaft 22 is distributed to the front-wheel-side output shaft 22. It switches to a non-distribution state in which no distribution is made to the axis 23 .

The fourth dog clutch 402 has a fourth switching sleeve 403 as a third distribution switching member. The fourth switching sleeve 403 has first gear teeth 403a that mesh with the first input gear teeth 25a of the transmission portion 25 and mesh with the second output gear teeth 52b of the second rotating member 52 that rotates integrally with the carrier C. The second rotating member 52 is rotatable relative to the transmission portion 25 and has first input gear teeth 25a. The fourth switching sleeve 403 is axially moved by the actuator of the fourth dog clutch 402 . The fourth switching sleeve 403 selectively meshes with the second output gear teeth 52b of the second rotating member 52 while the first gear teeth 403a are always meshed with the first input gear teeth 25a of the transmission section 25. That is, the fourth switching sleeve 403 has a ninth connection state (released state) in which the carrier C and the transmission section 25 are not connected and an eighth connection state (engagement state) in which the carrier C and the transmission section 25 are connected. switch between.

As shown in FIG. 23, when the transfer 12 of the sixth embodiment is in the first driving state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the first dog clutch. 41 is in the direct connection state, the second dog clutch 42 is in the engaged state, the third dog clutch 43 is in the third distribution state (first connected state), and the fourth dog clutch 402 is in the released state (disconnected state). That is, the fourth switching sleeve 403 does not mesh with the second rotating member 52 . The third switching sleeve 46 meshes with the rear-wheel-side output shaft 22 and the second rotating member 52 without meshing with the third rotating member 53 .

As described above, in the first driving state of the sixth embodiment, the input shaft 21 is directly connected to the rear wheel output shaft 22, but the rear wheel output shaft 22 is driven by the engine 2 while the engine 2 is stopped. never. On the other hand, the motor 30 is connected to the front wheel side output shaft 23 via the planetary gear device 24 in a speed change state. Therefore, in the first driving state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22 , the rotation of the motor 30 is changed by the planetary gear device 24 and transmitted to the rear-wheel output shaft 22 . In other words, in the sixth embodiment, by implementing the EV running mode when the transfer 12 is in the first drive state, two-wheel drive in which the rotation of the motor 30 is changed by the transfer 12 is possible.

As shown in FIG. 24, when the transfer 12 of the sixth embodiment is in the second driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are coupled so as to rotate integrally, and the connection switching device 40, the first dog clutch 41 is in a direct connection state, the second dog clutch 42 is in a released state, the third dog clutch 43 is in a second distribution state (third connected state), and the fourth dog clutch 402 is in a released state (disconnected state). That is, the fourth switching sleeve 403 does not mesh with the second rotating member 52 . The third switching sleeve 46 meshes with the rear wheel side output shaft 22 , the third rotating member 53 and the second rotating member 52 .

Thus, in the second driving state of the sixth embodiment, the input shaft 21 is directly connected to the rear wheel output shaft 22, but the rear wheel output shaft 22 is driven by the engine 2 while the engine 2 is stopped. never. Also, although the motor 30 is connected to the rear wheel side output shaft 22 via the planetary gear device 24, the planetary gear device 24 is in a non-transmission state. Therefore, in the second driving state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22, the three rotating elements of the planetary gear device 24 have the same rotation speed. That is, the rotation of the motor 30 is transmitted to the rear wheel side output shaft 22 without being changed by the planetary gear device 24 . That is, in the sixth embodiment, two-wheel drive in which the rotation of the motor 30 is changed by the transfer 12 is possible by implementing the EV running mode when the transfer 12 is in the second drive state.

As a modification of the sixth embodiment, a friction engagement device that selectively couples the carrier C and the ring gear R may be provided. This modification is illustrated in FIG.

As shown in FIG. 25, in the transfer 12 according to the first modification of the sixth embodiment, the connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, a third dog clutch 43, a friction clutch 401, It has Friction clutch 401 is the same as friction clutch 401 in the first modification of the fifth embodiment.

In this first modification, the first dog clutch 41 is in the directly connected state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the third distributed state (first connected state), so that the carrier C in the planetary gear device 24 is and the ring gear R rotate relative to each other, the friction clutch 401 can be switched between the engaged state and the released state.

For example, as shown in FIG. 25, the first dog clutch 41 connects the input shaft 21 and the rear wheel side output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 connects the carrier C and the rear wheel side output shaft. 22 is connected, the friction clutch 401 is brought into the engaged state so that the transfer 12 is brought into the second drive state. That is, in the first modified example, the second drive state is realized by switching the friction clutch 401 from the released state to the engaged state without moving the third switching sleeve 46 in the axial direction by the actuator of the third dog clutch 43. Is possible.

Further, as a second modification of the sixth embodiment, in addition to a friction engagement device (friction clutch 401) that selectively connects the carrier C and the ring gear R, a friction clutch that selectively fixes the ring gear R to the fixed member 29 is provided. An engagement device may be provided. This second modification is illustrated in FIG.

As shown in FIG. 26, in the transfer 12 according to the second modification of the sixth embodiment, the connection switching device 40 includes a first dog clutch 41, a second dog clutch 42, a third dog clutch 43, and a first friction clutch 47. and a second friction clutch 48 . The first friction clutch 47 and the second friction clutch 48 are the same as the first friction clutch 47 and the second friction clutch 48 of the fifth embodiment.

In this second modification, the first dog clutch 41 is in the directly connected state, the second dog clutch 42 is in the released state, and the third dog clutch 43 is in the third distributed state (first connected state), so that the carrier C in the planetary gear device 24 is and the ring gear R rotate relative to each other, it is possible to switch between the engaged state and the disengaged state of the first friction clutch 47 and the second friction clutch 48 .

For example, as shown in FIG. 26, the first dog clutch 41 connects the input shaft 21 and the rear wheel output shaft 22, the second dog clutch 42 is released, and the third dog clutch 43 connects the rear wheel output shaft 22 and the carrier. C, the first friction clutch 47 is in the engaged state and the second friction clutch 48 is in the released state, whereby the transfer 12 is in the first drive state, and the first friction clutch 47 is in the released state and the first drive state. The transfer 12 is placed in the second drive state by the engagement of the two-friction clutch 48 . That is, in the second modified example, the first driving state and the second driving state are obtained by changing the states of the first friction clutch 47 and the second friction clutch 48 without operating the second dog clutch 42 and the third dog clutch 43 . It is possible to switch between

Next, a power transmission device of a seventh embodiment will be described. In the seventh embodiment, unlike the fifth embodiment, one engagement device constituting the connection switching device 40 is provided for each connection destination of each rotary member. In addition, in the description of the seventh embodiment, the same reference numerals as those of the fifth embodiment are used, and the description thereof is omitted.

As shown in FIG. 27, the connection switching device 40 of the seventh embodiment includes a first clutch 410, a second clutch 420, a third clutch 430, a fourth clutch 440, a fifth clutch 450, a first A brake 460 is provided.

The first clutch 410 is an engagement device that functions as an input switching section and a speed change switching section, and is a frictional engagement device that selectively connects the input shaft 21 to the rear wheel side output shaft 22 . The first clutch 410 has a first frictional engagement element 411 that rotates integrally with the input shaft 21 and a second frictional engagement element 412 that rotates integrally with the rear wheel side output shaft 22. The engagement force is applied by hydraulic pressure. occur. In other words, the engagement force of first clutch 410 can be controlled by controlling the hydraulic pressure. The first clutch 410 has an engaged state (direct connection state) in which the input shaft 21 is connected to the rear-wheel output shaft 22 and a released state (disconnected state) in which the input shaft 21 is not connected to the rear-wheel output shaft 22. switch to When the first clutch 410 is engaged, the input shaft 21 and the rear wheel side output shaft 22 are connected so as to rotate integrally, and when the first clutch 410 is released, the input shaft 21 and the rear wheel side output shaft 22 are relatively rotatable. separated.

The second clutch 420 is an engaging device that functions as an input switching section and a shift switching section, and is a dog clutch that selectively connects the input shaft 21 to the sun gear S. Then, the second clutch 420 switches between an engaged state (input state) in which the input shaft 21 is connected to the sun gear S and a released state (disconnected state) in which the input shaft 21 is not connected to the sun gear S. When the second clutch 420 is engaged, the input shaft 21 and the sun gear S are connected so as to rotate together. When the second clutch 420 is released, the input shaft 21 and the sun gear S are separated so as to be relatively rotatable.

This second clutch 420 has a first switching sleeve 421 as an input switching member. The first switching sleeve 421 has gear teeth 421 a that mesh with the gear teeth 21 a of the input shaft 21 and the input gear teeth 51 a of the first rotating member 51 . The first switching sleeve 421 is axially moved by the actuator of the second clutch 420 . The first switching sleeve 421 has an engaged state in which the gear teeth 421a are always in mesh with the input shaft 21 and meshes with the input gear teeth 51a of the first rotating member 51, and a released state in which the input gear teeth 51a are not meshed. to switch between. That is, when the gear teeth 421a mesh with the input gear teeth 51a of the first rotating member 51, the second clutch 420 is in the engaged state (input state). On the other hand, when the gear teeth 421a do not mesh with the input gear teeth 51a, the second clutch 420 is in a released state (disconnected state).

In this manner, the first clutch 410 and the second clutch 420 are so-called high-low switching units (transmission switching units), and the rotation of the input shaft 21 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22. and a direct connection state in which the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without changing the speed. That is, a first input state in which the power from the engine 2 is transmitted to the rear wheel side output shaft 22 without going through the planetary gear device 24 by the first clutch 410 and the second clutch 420, and the power from the engine 2 is transmitted. , and the second input state of transmitting to the rear wheel side output shaft 22 via the planetary gear device 24 .

The third clutch 430 is an engaging device that functions as a distribution switching unit, and is a dog clutch that selectively connects the rear wheel side output shaft 22 and the ring gear R. The third clutch 430 is in an engaged state (second connected state) in which the rear-wheel output shaft 22 and the ring gear R are connected, and in a released state (third connection state) in which the rear-wheel output shaft 22 and the ring gear R are not connected. connection status). When the third clutch 430 is engaged, a distribution state is established in which a portion of the power transmitted to the rear wheel output shaft 22 is distributed to the front wheel output shaft 23 . When the third clutch 430 is released, a non-distribution state is entered in which the power transmitted to the rear-wheel output shaft 22 is not distributed to the front-wheel output shaft 23 .

This third clutch 430 has a third switching sleeve 431 that functions as a first distribution switching member. The third switching sleeve 431 has gear teeth 431 a that mesh with the second gear teeth 22 b of the rear-wheel output shaft 22 and the second output gear teeth 52 b of the third rotating member 53 . The third switching sleeve 431 is axially moved by the actuator of the third clutch 430 . The third switching sleeve 431 is engaged with the second gear teeth 22b of the rear-wheel-side output shaft 22 while the gear teeth 431a are always in mesh with the third rotating member. Toggles between disengaged and disengaged states. When the gear teeth 431a mesh with the second gear teeth 22b of the rear-wheel output shaft 22, the second clutch 420 is engaged. On the other hand, when the gear teeth 431a do not mesh with the second gear teeth 22b of the rear-wheel output shaft 22, the third clutch 430 is released. Thus, the third switching sleeve 431 can be switched between the second connected state and the third connected state as the first distribution switching member.

The fourth clutch 440 is an engagement device that functions as a distribution switching unit, and is a frictional engagement device that selectively connects the carrier C and the rear-wheel output shaft 22 . The fourth clutch 440 has a first frictional engagement element that rotates integrally with the carrier C, and a second frictional engagement element that integrally rotates with the rear wheel side output shaft 22, and an engagement force is generated by hydraulic pressure. The engagement force of fourth clutch 440 can be controlled by controlling the hydraulic pressure. The fourth clutch 440 has an engaged state (first connected state) in which the carrier C is connected to the rear-wheel output shaft 22 and a released state (third connected state) in which the carrier C is not connected to the rear-wheel output shaft 22. ). When the fourth clutch 440 is engaged, the carrier C and the rear wheel side output shaft 22 are connected so as to rotate integrally. When the fourth clutch 440 is released, the carrier C and the rear wheel side output shaft 22 are separated so as to be relatively rotatable. Thus, the fourth clutch 440 functions as a first distribution switching member and can switch between the first connected state and the third connected state. That is, the third clutch 430 and the fourth clutch 440 have separate functions as the first distribution switching member. Therefore, the third clutch 430 and the fourth clutch 440 function as a first distribution switching member, and can switch among the first connected state, the second connected state, and the third connected state.

Fifth clutch 450 is an engagement device that functions as a shift switching unit and a distribution switching unit, and is a frictional engagement device that selectively couples carrier C and ring gear R together. The fifth clutch 450 has a first friction engagement element that rotates together with the ring gear R and a second friction engagement element that rotates together with the carrier C, and an engagement force is generated by hydraulic pressure. The engaging force of the fifth clutch 450 can be controlled by controlling the hydraulic pressure. Then, fifth clutch 450 switches between an engaged state (fourth connected state) in which ring gear R and carrier C are connected and a released state (fifth connected state) in which ring gear R and carrier C are not connected. When the fifth clutch 450 is engaged, the carrier C and the ring gear R are connected so as to rotate integrally. When the fifth clutch 450 is released, the carrier C and the ring gear R are separated so as to be relatively rotatable (differential). Thus, the fifth clutch 450 functions as a second distribution switching member, and can switch between the fourth connected state and the fifth connected state.

The first brake 460 is an engagement device that functions as a fixed switching portion and a shift switching portion, and is a dog clutch that selectively connects the ring gear R and the fixed member 29 . Then, the first brake 460 switches between an engaged state (fixed state) in which the ring gear R and the fixed member 29 are connected and a released state (non-fixed state) in which the ring gear R and the fixed member 29 are not connected. That is, the first brake 460 selectively fixes the ring gear R to the fixed member 29 . Therefore, the first brake 460 switches between a fixed state in which the ring gear R is mechanically fixed and a released state in which the ring gear R is rotatable.

This first brake 460 has a second switching sleeve 461 as a shift switching member and a fixed switching member. The second switching sleeve 461 has gear teeth 461 a that mesh with the first output gear teeth 53 a of the third rotating member 53 and the fixed member 29 . For example, the second switching sleeve 461 is moved in the axial direction by the actuator of the first brake 460 while constantly meshing with the fixed member 29 . The second switching sleeve 461 switches between an engaged state in which it meshes with the first output gear teeth 53a of the third rotating member 53 and a released state in which it does not mesh with the first output gear teeth 53a. That is, the second switching sleeve 461 switches between a fixed state in which the ring gear R is connected to the fixed member 29 and a released state in which the ring gear R is not connected to the fixed member 29 .

Here, the first to fifth drive states realized by the transfer 12 of the seventh embodiment will be explained.

When the transfer 12 of the seventh embodiment is in the first driving state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the engagement state (direct connection state) of the first clutch 410 . state), the second clutch 420 is released, the third clutch 430 is released, the fourth clutch 440 is released, the fifth clutch 450 is released, and the first brake 460 is engaged (fixed).

When the transfer 12 of the seventh embodiment is in the second driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40 switches the first clutch 410 to The engaged state (direct connection state), the second clutch 420 in the released state, the third clutch 430 in the released state, the fourth clutch 440 in the released state, the fifth clutch 450 in the engaged state (integrated state), the first brake 460 is released. Therefore, in this second driving state, when the power of the motor 30 is transmitted to the front-wheel output shaft 23, the three rotating elements have the same rotational speed as shown in FIG. In the second driving state, the first clutch 410 is engaged, so that the engine 2 and the rear-wheel-side output shaft 22 are connected so as to allow power transmission. Power is not transmitted to the rear wheel side output shaft 22 .

28, 29, and 30 show nomographic charts showing the rotation state of the planetary gear device 24. The motor 30 is "MG", the engine 2 is "ENG", the sun gear S is "S , the carrier C is "C", the ring gear R is "R", the first clutch 410 is "CL1", the second clutch 420 is "CL2", the third clutch 430 is "CL3", and the fourth clutch 440 is "CL4 ", and the fifth clutch 450 is described as "CL5".

When the transfer 12 of the seventh embodiment is in the third driving state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C, and the ring gear R can be differentially operated, and the connection switching device 40 switches the first clutch 410 to The engaged state (direct connection state), the second clutch 420 in the released state, the third clutch 430 in the engaged state (distribution state), the fourth clutch 440 in the released state, the fifth clutch 450 in the released state, and the first brake 460 Released.

Thus, in the third driving state, the input shaft 21 is directly connected to the rear wheel side output shaft 22, so the power transmitted from the engine 2 to the input shaft 21 is output to the rear wheel side without passing through the planetary gear device 24. It is transmitted to shaft 22 . Therefore, the rotation of the input shaft 21 is transmitted to the rear wheel side output shaft 22 without being changed. Further, since the planetary gear device 24 is in a distribution state in which differential is possible, the power of the motor 30 is distributed and transmitted to the transmission portion 25 and the rear wheel side output shaft 22 via the planetary gear device 24 . Therefore, in the third drive state, as shown in FIG. 29, the torque output from the motor 30 can control the distribution of the power transmitted to the front wheels and the rear wheels.

When the transfer 12 of the seventh embodiment is in the fourth driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40 operates so that the first clutch 410 is engaged state (directly connected state), second clutch 420 in released state, third clutch 430 in engaged state (distributed state) or released state, fourth clutch 440 in engaged state (distributed state) or released state, fifth The clutch is engaged (integrated) or released.

In this fourth drive state, the planetary gear device 24 with limited differential should be connected to the rear wheel side output shaft 22 . Therefore, when the third clutch 430 is engaged, the fourth clutch 440 is engaged, and the fifth clutch 450 may be either released or engaged. When third clutch 430 is disengaged, fourth clutch 440 and fifth clutch 450 are engaged. Further, when the fourth clutch 440 is in the released state, the third clutch 430 and the fifth clutch 450 are in the engaged state.

Thus, in the fifth driving state, the input shaft 21 is connected to the first rotating member 51, so that the power transmitted from the engine 2 to the input shaft 21 is transmitted to the rear wheel side output shaft 22 via the planetary gear device 24. transmitted. Further, since the planetary gear device 24 is in a speed change state, the rotation of the input shaft 21 is changed by the planetary gear device 24 and transmitted to the rear wheel side output shaft 22 . Similarly, the motor 30 is also connected to the rear wheel side output shaft 22 via a planetary gear device 24 in a speed change state. Therefore, in the fifth drive state, when the power of the motor 30 is transmitted to the rear-wheel output shaft 22, as shown in FIG. will be transmitted to

As a modification of the seventh embodiment, the functions of the first clutch 410 and the second clutch 420 may be realized by one engagement device. This modification is illustrated in FIG.

As shown in FIG. 31, in the transfer 12 according to the first modification of the seventh embodiment, the connection switching device 40 includes a seventh clutch 470, a third clutch 430, a fourth clutch 440, and a fifth clutch 450. , and a first brake 460 . The seventh clutch 470 is the same as the first dog clutch 41 of the fifth embodiment. Therefore, the seventh clutch 470 is in a direct connection state in which the input shaft 21 and the rear-wheel-side output shaft 22 are connected in the first to fourth drive states, and is in a direct connection state in which the input shaft 21 and the sun gear S are connected in the fifth drive state. It becomes a 2-input state (speed change state).

Further, as a second modification of the seventh embodiment, the functions of the fifth clutch 450 and the first brake 460 are realized by one engagement device, and the third clutch 430 and the fourth clutch 440 are Each function may be realized by one engagement device. This second modification is illustrated in FIG.

As shown in FIG. 32 , the connection switching device 40 includes a seventh clutch 470 , an eighth clutch 480 and a ninth clutch 490 in the transfer 12 according to the second modification of the seventh embodiment.

The eighth clutch 480 integrates the functions of the fifth clutch 450 and the first brake 460 of the seventh embodiment. The eighth clutch 480 is an engaging device that functions as a distribution switching section and a shift switching section, and is a dog clutch that switches the connection relationship between the fixed member 29, the carrier C, and the ring gear R. The eighth clutch 480 has a released state (unfixed state and fifth connected state) in which the eighth clutch 480 is connected only to the fixed member 29, an integrated state (fourth connected state) in which the ring gear R and the carrier C are connected, and a ring gear It switches between a fixed state in which R and the fixed member 29 are connected.

The eighth clutch 480 has a second switching sleeve 481 as a distribution switching member and a fixed switching member. The second switching sleeve 481 includes first gear teeth 481 a meshing with the first output gear teeth 52 a of the second rotating member 52 , the first output gear teeth 53 a of the third rotating member 53 , and the fixed member 29 , and the second rotating member 52 . and a second gear tooth 481b that meshes with the first output gear tooth 52a of the third rotating member 53 and the first output gear tooth 53a of the third rotating member 53. The second switching sleeve 481 is axially moved by the actuator of the eighth clutch 480 . The second switching sleeve 481 is in a released state (unfixed state and fifth connected state) in which only the fixed member 29 is engaged, and in a state in which the second switching sleeve 481 is not engaged with the fixed member 29 and is engaged with the second rotating member 52 and the third rotating member 53 . It switches between an integrated state (fourth connected state) in which they are meshed and a fixed state in which they are meshed with the third rotating member 53 and the fixed member 29 without meshing with the second rotating member 52 . That is, the second switching sleeve 481 functions as a second distribution switching member and can switch between the fourth connection state and the fifth connection state.

The ninth clutch 490 integrates the functions of the third clutch 430 and the fourth clutch 440 of the seventh embodiment. The ninth clutch 490 has a third switching sleeve 491 as a distribution switching member. The ninth clutch 490 is the same as the third dog clutch 43 of the fifth embodiment. That is, the ninth clutch 490 and the third switching sleeve 491 are in a first non-distribution state (sixth connection state) in which the rear-wheel-side output shaft 22 is not connected to the ring gear R and the carrier C, and a state in which the ring gear R is connected to the carrier C. A second non-distribution state (seventh connection state), a first distribution state (second connection state) in which the rear-wheel output shaft 22 is connected to the ring gear R, and a rear-wheel output shaft 22 connected to the ring gear R and the carrier C It switches between a second distribution state (third connection state) of connecting and a third distribution state (first connection state) of connecting the rear-wheel-side output shaft 22 to the carrier C. That is, the ninth clutch 490 and the third switching sleeve 491 function as a first distribution switching member and can switch between the first connected state and the second connected state.

When the transfer 12 of this second modification is in the first driving state, the planetary gear device 24 is in the second mode in which the ring gear R is mechanically fixed, and the connection switching device 40 is in the state where the seventh clutch 470 is directly connected, The eighth clutch 480 is in the fixed state, and the ninth clutch 490 is in the first non-distribution state. That is, the second switching sleeve 481 meshes with the second rotating member 52 and the third rotating member 53 . The third switching sleeve 491 meshes only with the rear wheel side output shaft 22 .

When the transfer 12 of the second modified example is in the second driving state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40 is in the seventh clutch 470. is in the direct connection state, the eighth clutch 480 is in the integrated state, and the ninth clutch 490 is in the first non-distribution state. That is, the second switching sleeve 481 meshes with the second rotating member 52 and the third rotating member 53 without meshing with the fixed member 29 . The third switching sleeve 491 meshes only with the rear wheel side output shaft 22 .

When the transfer 12 of the second modification is in the third driving state, the planetary gear device 24 is in the second mode in which the sun gear S, the carrier C and the ring gear R can be differentially operated, and the connection switching device 40 is in the seventh clutch 470. is in the directly connected state, the eighth clutch 480 is in the released state, and the ninth clutch 490 is in the first distributed state. That is, the second switching sleeve 481 meshes only with the fixed member 29 . The third switching sleeve 491 meshes with the third rotating member 53 and the rear wheel side output shaft 22 .

When the transfer 12 of the second modified example is in the fourth drive state, the planetary gear device 24 is in the third mode in which the carrier C and the ring gear R are connected so as to rotate integrally, and the connection switching device 40 is in the seventh clutch 470. is in the direct connection state, the eighth clutch 480 is in the integrated state, and the ninth clutch 490 is in the third distributed state. That is, the second switching sleeve 481 meshes with the second rotating member 52 and the third rotating member 53 without meshing with the fixed member 29 . The third switching sleeve 491 meshes with the second rotating member 52 and the rear wheel side output shaft 22 .

When the transfer 12 of the second modified example is in the fifth drive state, the planetary gear device 24 is in the first mode in which the ring gear R is mechanically fixed, and the connection switching device 40 puts the seventh clutch 470 in the second input state. (shift state), the eighth clutch 480 is in the fixed state, and the ninth clutch 490 is in the third distribution state. That is, the second switching sleeve 481 meshes with the fixed member 29 and the third rotating member 53 . The third switching sleeve 491 meshes with the second rotating member 52 and the rear wheel side output shaft 22 .

In the fifth to seventh embodiments, the structure in which the motor 30 is arranged on the same axis as the input shaft 21 and the rear wheel side output shaft 22 is not limited. That is, the motor 30 may be arranged on a separate axis from the input shaft 21 and the rear-wheel-side output shaft 22, and may be connected to the sun gear S via a gear mechanism (for example, a speed reducer). In the fifth to seventh embodiments, the motor 30 may be connected to the first rotating member 51 via the counter gear 32 so as to be able to transmit power as in the first embodiment. In other words, in the first to fourth embodiments, the motor 30 is arranged on the same axis as the input shaft 21 and the rear wheel side output shaft 22 as in the fifth embodiment, and is configured to rotate integrally with the sun gear S. may be

Further, in the first to seventh embodiments, the planetary gear device 24 may be configured by a differential device that has three rotating elements and that allows the rotating elements to act differentially with each other. In other words, any one of the three rotating elements may be a differential gear that can be fixed. Also, the motor generator can be described as a rotating electric machine. In short, since the motor 30 is configured by a rotating electrical machine (motor generator), it is possible to generate power from the power from the engine 2 or regenerative power from power input from the driving wheels. Electric power generated by the motor 30 is stored in the battery. Furthermore, the first power source and the second power source may be either an engine or a rotating electric machine. For example, the first power source may be a rotating electrical machine, and the second power source may be an engine. Moreover, in the first mode, at least the fixed elements should be fixed to the fixed member 29 for the three rotating elements. In other words, in the first mode, the planetary gear device 24 only needs to be in the speed change state, so the connection destination of the input element and the output element is not particularly limited. In short, the first mode includes a state in which the first power source is not connected to the input element.

1 vehicle 2 engine (first power source)
3, 3R, 3L front wheels 4, 4R, 4L rear wheels 10 power transmission device 11 transmission 12 transfer 13 front propeller shaft 14 rear propeller shaft 20 transfer case 21 input shaft 22 rear wheel side output shaft (first output shaft)
23 Front wheel side output shaft (second output shaft)
24 Planetary Gear Device 25 Transmission Part 29 Fixed Member 30 Motor 40 Connection Switching Device 41 First Dog Clutch 42 Second Dog Clutch 43 Third Dog Clutch 44 First Switching Sleeve 45 Second Switching Sleeve 46 Third Switching Sleeve 47 First Friction Clutch 48 Second 2 friction clutch 51 first rotating member 52 second rotating member 53 third rotating member C carrier S sun gear R ring gear

Claims (21)

an input shaft for inputting power from the first power source;
a second power source;
a first output shaft that transmits power to the first drive wheel;
a second output shaft that transmits power to the second drive wheel;
a differential having three rolling elements;
a connection switching device for selectively switching connection relationships between the input shaft, the first output shaft, the second output shaft, and the three rotating elements;
with
A power transmission device in which the connection switching device is configured to selectively fix any one of the three rotating elements to a fixed member,
The second power source is connected to a rotating element other than the rotating element fixed to the fixed member by the connection switching device among the three rotating elements,
The differential device can be switched to a plurality of modes by the connection switching device,
The plurality of modes are
One of the three rotating elements is connected to the input shaft, one of the remaining rotating elements is fixed to the fixed member, and the other is attached to the first output shaft. a concatenated first mode;
A power transmission device, wherein the three rotating elements include the second power source, the first output shaft, and a second mode coupled to the second output shaft, respectively. The three rotating elements include a first rotating element connected to the second power source, a second rotating element, and a third rotating element,
The connection switching device
an input switching unit for switching a connection destination of the input shaft;
a fixation switching unit capable of selectively fixing any one of the three rotating elements to the fixing member;
The input switching unit switches between a first input state in which the input shaft is connected to the first rotating element and a second input state in which the input shaft is directly connected to the first output shaft,
The fixation switching unit switches between a fixed state in which the third rotating element is connected to the fixed member and an unfixed state in which the third rotating element is rotatably released,
The differential gear is in the first mode, the first rotating element is an input element, the second rotating element is an output element connected to the first output shaft, and the third rotating element is fixed to the fixed member. the input switching unit is in the first input state to connect the input shaft to the first rotation element, and
When the differential device is in the second mode and the three rotating elements are capable of differential operation, the input switching unit is in the second input state and directly connects the input shaft to the first output shaft. 2. A power transmission device according to claim 1. The connection switching device has a distribution switching unit that selectively connects the first output shaft to the second rotating element or the third rotating element,
The distribution switching unit switches between a first connection state in which the first output shaft is connected to the second rotating element and a second connection state in which the first output shaft is connected to the third rotating element. The power transmission device according to claim 2, characterized by: When the fixed switching section is in the fixed state and the differential device is in the first mode, the input switching section can be switched between the first input state and the second input state. can be,
If the input switching unit is in the first input state and the distribution switching unit is in the first connection state when the differential gear is in the first mode, the power supply from the first power source is Power and power of the second power source are distributed to the first drive wheel and the second drive wheel via the differential, and the rotation of the input shaft and the rotation of the second power source are distributed to the 4. The power transmission device according to claim 3, wherein a drive state is established in which the gear is shifted by a differential and transmitted to the first drive wheel and the second drive wheel. 5. The power transmission according to claim 3 or 4, wherein when the differential device is in the second mode and the three rotating elements are capable of differential operation, the distribution switching unit is in the second connection state. Device. In the plurality of modes, two of the three rotating elements are connected to each other, and one of the rotating elements is connected to one of the first output shaft and the second output shaft. 6. The power transmission device according to any one of claims 3 to 5, comprising a third mode that The distribution switching unit is capable of switching to a third connection state in which the first output shaft is connected to the second rotating element and the third rotating element,
When the distribution switching unit is in the third connection state so that the differential device is in the third mode and the three rotary elements rotate together, the input switching unit is in the first input state and the first input state. 7. A power transmission device according to claim 6, characterized in that it can be switched between two input states. The distribution switching unit
a first distribution switching member that selectively connects the first output shaft to the second rotating element or the third rotating element;
a second distribution switching member that selectively connects the second rotating element and the third rotating element;
The first distribution switching member switches among the first connection state, the second connection state, and the third connection state,
The second distribution switching member has a fourth connection state in which the second rotation element and the third rotation element are connected, and a fifth connection state in which the second rotation element and the third rotation element are not connected. switch between
When the first distribution switching member is in the third connection state, the differential device is in the third mode, and the three rotating elements rotate together, the input switching unit is in the first input state. It is possible to switch between the second input state, and the second distribution switching member can be switched between the fourth connection state and the fifth connection state. The power transmission device according to claim 7. The distribution switching unit
a first distribution switching member that selectively connects the first output shaft to the second rotating element or the third rotating element;
a second distribution switching member that selectively connects the second rotating element and the third rotating element;
The first distribution switching member switches between the first connection state and the second connection state,
The second distribution switching member has a fourth connection state in which the second rotation element and the third rotation element are connected, and a fifth connection state in which the second rotation element and the third rotation element are not connected. switch between
When the second distribution switching member is in the fourth connection state, the differential device is in the third mode, and the three rotating elements rotate together, the input switching unit is in the first input state. It is possible to switch between the second input state, and the first distribution switching member is capable of switching between the first connection state and the second connection state. The power transmission device according to claim 6. The distribution switching unit is capable of switching to a sixth connection state in which the first output shaft is not connected to either the second rotating element or the third rotating element,
When the differential device is in the first mode by setting the fixed switching unit to the fixed state, the input switching unit can be switched between the first input state and the second input state. The power transmission device according to any one of claims 3 to 9, wherein the distribution switching unit can select the sixth connection state. The distribution switching unit is capable of switching to a seventh connection state in which the second rotation element and the third rotation element are connected while not being connected to the first output shaft,
When the distribution switching unit is in the seventh connection state and the three rotary elements of the differential device rotate together, the input switching unit switches between the first input state and the second input state. 11. A power transmission device according to claim 10, characterized in that it is possible to switch between. The distribution switching unit is capable of switching to a sixth connection state in which the first output shaft is not connected to either the second rotating element or the third rotating element,
When the second distribution switching member is in the fourth connection state, the differential device is in the third mode, and the three rotating elements rotate together, the input switching unit is in the first input state. 10. The power transmission device according to claim 8, wherein the second input state can be switched, and the distribution switching unit can select the sixth connection state. The connection switching device has a third distribution switching member that selectively connects the second rotary element and the second output shaft,
The third distribution switching member is positioned between an eighth connection state in which the second rotary element and the second output shaft are connected and a ninth connection state in which the second rotary element and the second output shaft are disconnected. 10. The power transmission device according to claim 8 or 9, wherein the power transmission is switched at . When the differential device is in the first mode, the input switching section is in the second input state, the first distribution switching member is in the first connection state, and the third distribution switching member is in the ninth connection state. In this case, in a state in which power from the first power source is not transmitted to the first output shaft and the second output shaft and power from the second power source is not transmitted to the second output shaft, 14. The power transmission device according to claim 13, wherein the drive state is such that the power of the second power source is transmitted to the first output shaft via the differential device. When the second distribution switching member is in the fourth connection state, the differential gear is in the third mode, and the three rotating elements rotate together, the third distribution switching member is in the ninth connection state. 14. The power transmission device according to claim 13, wherein the first distribution switching member can be switched between the first connection state and the second connection state. The connection switching device has a third distribution switching member that selectively connects the second rotary element and the second output shaft,
The third distribution switching member is positioned between an eighth connection state in which the second rotary element and the second output shaft are connected and a ninth connection state in which the second rotary element and the second output shaft are disconnected. to switch with
When the first distribution switching member is in the third connection state, the differential gear is in the third mode, and the three rotating elements rotate together, the third distribution switching member is in the ninth connection state. The power transmission device according to claim 8, characterized in that: The fixed switching unit
The third rotating element is an engaging element, and a first engagement is switched between an engaged state in which the third rotating element is connected to the fixed member and a released state in which the third rotating element is rotatably released. having a device
The distribution switching unit
An engagement state in which the second rotation element and the third rotation element are engaged with the second rotation element and the third rotation element, and the second rotation element engages the third rotation element. 10. The power transmission device according to claim 8 or 9, further comprising a second engagement device that switches between a released state in which relative rotation is possible and a released state. The fixation switching part uses the third rotating element as an engaging element, and is between an engaged state in which the third rotating element is connected to the fixed member and a released state in which the third rotating element is rotatably released. It is configured by a first engagement device that switches with
The second distribution switching member has the second rotating element and the third rotating element as engaging elements, and has an engaged state in which the second rotating element and the third rotating element are engaged with each other, and the second rotating element. 10. The power transmission device according to claim 8 or 9, further comprising a second engaging device that switches between a released state in which the element is released so as to be rotatable relative to the third rotating element. further comprising a transmission unit that transmits power to the second output shaft,
The first distribution switching member has a first distribution state in which the second rotary element is connected to the first output shaft when the first output shaft is connected to the transmission portion, and a first distribution state in which the first output shaft is connected to the transmission portion. a first non-distribution state in which the second rotary element is connected to the first output shaft when the first output shaft is connected to the transmission portion; and a first non-distribution state in which the third rotary element is connected to the first switching between a second non-distributing state coupled to the output shaft;
The second distribution switching member has an integrated state in which the second rotating element and the third rotating element are connected, a fixed state in which the third rotating element is connected to the fixed member, and the second rotating element. 17. The power transmission device according to any one of claims 13 to 16, wherein the power transmission device is switched between a second distribution state in which the transmission portion is connected. further comprising a transmission unit that transmits power to the second output shaft,
The first distribution switching member is capable of selectively connecting the first output shaft to the transmission section, and is connected to the input shaft when connecting the first output shaft to the transmission section. a first distribution state in which the second rotating element is connected to the first output shaft without connecting the second rotary element to the first output shaft; Toggles between distributed states and
The second distribution switching member is capable of selectively connecting the second rotating element to the transmitting portion, and is in an integrated state in which the second rotating element and the third rotating element are connected; 17. Switching between a fixed state in which the third rotating element is connected to the fixed member and a second distributed state in which the second rotating element is connected to the transmission section. The power transmission device according to any one of claims 1 to 3. The differential is a single pinion type planetary gear,
The first rotating element is a sun gear,
the second rotating element is a carrier;
The power transmission device according to any one of claims 2 to 20, wherein the third rotating element is a ring gear.

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