JP3855960B2 - Vehicle transmission device including motor generator bridge transmission member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmission for a vehicle, and in particular, includes a clutch and a transmission mechanism, and the transmission mechanism is driven by an engine and a motor generator via the clutch. The present invention relates to a vehicle transmission device.
[0002]
[Prior art]
When the drive of a vehicle such as an automobile is hybridized to cope with fossil fuel resource saving and air pollution problems, the drive power from both the engine and motor generator will be introduced into the vehicle transmission device. In this case as well, it is necessary that at least the connection to the engine is made through a clutch, and in order to regenerate the kinetic energy of the vehicle body as much power as possible when the vehicle decelerates, It is desirable that the engine be disconnected from the wheels. Therefore, when the vehicle drive is hybridized, generally, the motor generator is generally incorporated on the downstream side of the clutch, and the arrangement is in the order of engine-clutch-motor generator-transmission device.
[0003]
However, even when the arrangement as the drive system is as described above, it is described in Patent Document 1 below that the motor generator is arranged concentrically on the outer side in the circumferential direction of the clutch as an assembly structural arrangement. In this example, a second clutch is also inserted between the motor generator and the transmission. Patent Document 2 below describes that motor generators are arranged concentrically outside in the circumferential direction of the transmission. However, this example is a geared neutral type in which two motor generators are used and neutral is achieved without using a clutch. As a transmission for a vehicle, in addition to an old gear transmission, a belt-type or toroidal-type continuously variable transmission is now used, but the mainstream is still a gear transmission. It is.
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-87080 [Patent Document 2]
Japanese Patent Laid-Open No. 2001-152901 [0004]
[Problems to be solved by the invention]
When the clutch is a multi-plate type, its diameter can be made relatively small. Therefore, even if a motor generator is arranged on the outer side in the circumferential direction of the clutch as in Patent Document 1, the entire transmission device is The diameter does not have to be so large, but in this case, the axial dimension of the transmission is considerably increased due to the multiple plate type clutch. On the other hand, when the clutch is a single plate type, its diameter is quite large, so the motor generator must be arranged in the axial direction with respect to the clutch, but the single plate type clutch in the vehicle drive system is Since the normal opening / closing operation part is arranged on the downstream side of the clutch for the convenience of opening / closing operation, when the motor generator is arranged coaxially on the downstream side of the clutch, the motor generator is connected to the opening / closing operation part of the clutch. Therefore, when the motor generator is arranged at this position, the axial dimension of the entire transmission device is surely increased by the axial dimension of the motor generator. When the motor generator is coaxially disposed on the downstream side of the clutch, in many cases, when the transmission is a gear transmission, the positions of the output gear of the motor generator and the transmission overlap. In view of these inconveniences, it is considered in some cases that the motor generator is connected to the outside of the engine, that is, the side opposite to the clutch of the engine. There is a problem that the engine prevents the motor from being regenerated as electric power.
[0005]
In view of the above circumstances, an object of the present invention is to provide a new vehicle transmission device that overcomes all of the above inconveniences and incorporates a motor generator into a vehicle drive system together with an engine.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a clutch and a speed change mechanism, and the speed change mechanism is driven by an engine and also by a motor generator via the clutch. A first rotational power receiving end for receiving rotational power from the engine and a second rotational power receiving end for receiving rotational power from the motor generator with the clutch interposed therebetween, mechanism is located on the opposite side in the axial direction and the second rotational power receiving end is connected to the speed change mechanism by the rotational power bridging transmission member extending beyond the periphery of said clutch, said clutch Is a first rotating member integrally connected to the first rotating power receiving end, and the first rotating member is connected to the second rotating power receiving end in a torque transmission relationship. A second rotating member pressed against the friction engaging relationship; a pressing means for pressing the second rotating member against the first rotating member against the friction engaging relationship; and the second rotating member fixed to the first rotating member. A biasing means for biasing the pressing means so as to press the one rotating member in a frictional engagement relationship; and the pressing means causes the second rotating member to be in a frictional engagement relationship with the first rotating member. A friction engagement releasing means for biasing the pressing means against the biasing means so as to release the pressing, and the friction engagement releasing means releases the friction engagement across the rotational power bridge transmission means. A vehicle transmission comprising: a friction engagement release force transmission means for transmitting a force; and a thrust bearing that allows relative rotation between the friction engagement release force transmission means and the pressing means. A device is provided.
[0007]
In the vehicle transmission device as described above, the rotational power bridging transmission member is integrally connected to the second rotational power receiving end at one end in the axial direction, and the rotation of the speed change mechanism at the other axial end. It is a member that is connected to the power input end in a torque transmission relationship and rotates integrally with the rotational power input end of the speed change mechanism, and the second rotational power receiving end may be supported by a bearing from the input side member of the clutch. .
[0009]
The friction engagement disengaging means rotates together with the rotary power bridging transmission means and is capable of being biased across the rotary power bridging transmission means in the axial direction, slide member biasing means for biasing the slide member, A thrust bearing that transmits the bias between the slide member biasing means and the slide member while allowing rotation of the slide member around the rotation center axis of the rotary power bridging transmission means may be included.
[0010]
The transmission mechanism includes an input shaft, an output shaft arranged parallel to the input shaft, a plurality of sets of transmission gears that are respectively supported on the input shaft and the output shaft and mesh with each other, and the plurality of sets of transmission gears. Shift switching means for selectively transmitting a selected pair of transmission gears to a torque transmission state, and a rotational power take-out end on the output shaft side is a rotational power input end on the input shaft side. And a gear transmission mechanism at the same axial end.
[0011]
[Action and effect of the invention]
As described above, in a vehicle transmission device having a clutch and a speed change mechanism, the speed change mechanism being driven by the engine via the clutch and also driven by the motor generator, The first rotational power receiving end for receiving rotational power and the second rotational power receiving end for receiving rotational power from the motor generator are located on the opposite side of the transmission mechanism with the clutch interposed therebetween, If the second rotational power receiving end is connected to the speed change mechanism by a rotational power bridging transmission member extending beyond the periphery of the clutch, the motor generator is a clutch in terms of the rotational power transmission function. The motor generator is arranged on the upstream side of the clutch from the viewpoint of the arrangement structure, and it is clear from the example of the embodiment described below with reference to the accompanying drawings. The motor generator is arranged here by utilizing the annular space left along the outer peripheral portion of the clutch upstream side rotation member configured as a dish-shaped member that also serves as a normal flywheel, and thereby the conventional vehicle transmission device It is selectively driven by the engine and motor generator without substantially increasing the radial dimension and the axial dimension, and when the vehicle decelerates, the engine is disconnected from the wheel, and the kinetic energy of the vehicle is regenerated more effectively as electric power. A vehicle transmission device can be obtained.
[0012]
In the vehicle transmission device as described above, the rotational power bridging transmission member is integrally connected to the second rotational power receiving end at one end in the axial direction, and the rotation of the speed change mechanism at the other axial end. A member connected to the power input end in a torque transmission relationship and rotating integrally with the rotational power input end of the speed change mechanism, and the second rotational power receiving end is supported by a bearing from the input side member of the clutch. Even if the rotary power bridging transmission member is configured as a thin container-like member extending along and close to the outer contour of the clutch, it sufficiently carries the required amount of torque by bypassing the clutch. However, it can be a member that rotates coaxially and stably with the clutch independently of the clutch.
[0013]
A clutch is connected to the first rotating power receiving end integrally with the first rotating member, and the second rotating power receiving end is connected to the torque transmitting relationship with the second rotating power receiving end, and is frictionally engaged with the first rotating member. A second rotating member pressed against the first rotating member, a pressing means for pressing the second rotating member against the first rotating member in a frictional engagement relationship, and the second rotating member on the first rotating member. An urging unit that urges the pressing unit to press against the frictional engagement relationship; and the pressing unit releases the pressing of the second rotating member against the first rotating member in the frictional engagement relationship. A friction engagement release means for biasing the pressing means against the biasing means, and the friction engagement release means transmits a friction engagement release force across the rotational power bridging transmission means. Disengagement force transmission means and the friction If the clutch includes a thrust bearing that allows relative rotation between the engagement / disengagement force transmitting means and the pressing means, the clutch is always kept in an engaged state by an urging means incorporated in itself. When the engagement should be released, the friction engagement release force transmission means for transmitting the friction engagement release force across the rotational power bridge transmission means transmits the friction engagement release force to the pressing means via the thrust bearing. Therefore, when the clutch is disengaged, the relative rotation between the rotary power bridging transmission means and the first and second rotary members of the clutch becomes free. The clutch disengagement operation is not hindered by being performed across.
[0014]
The friction engagement release force transmission means rotates together with the rotary power bridge transmission means, and a slide member that can be biased across the rotational power bridge transmission means in the axial direction, a slide member bias means that biases the slide member, and the rotary power bridge As long as it includes a thrust bearing that transmits the deviation between the slide member biasing means and the slide member while allowing rotation of the slide member around the rotation center axis of the transmission means, the rotational power bridge transmission means Even if it rotates like this, the friction engagement releasing force for releasing the frictional engagement of the clutch can be transmitted from the outside to the friction engagement releasing means located inside thereof.
[0015]
If the motor generator is arranged on the upstream side of the clutch as described above and it is connected to the transmission on the downstream side of the clutch across the clutch in the axial direction along the outer contour of the clutch, Since it is avoided that the main body of the motor generator enters the coupling portion between the clutch and the transmission, the transmission mechanism is provided for the input shaft, the output shaft arranged in parallel to the input shaft, and the input shaft and the output shaft, respectively. A plurality of transmission gear pairs that are carried and meshed with each other, and a shift switching means for selectively transmitting a selected transmission gear pair of the plurality of transmission gear pairs to the torque transmission state; The position of the motor generator overlaps the position of the rotational power take-off end of the transmission mechanism even when the rotational power take-out end is at the same axial end as the rotational power input end on the input shaft side. It ’s gone, Compact structure of the vehicle transmission incorporating a motor generator can be performed with that gear change mechanism. This is particularly beneficial in the case of a vehicle drive structure in which a differential gear device for a pair of drive wheels is disposed adjacent to the rotational power take-out end of such a gear transmission mechanism.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 attached herewith shows an embodiment in which a vehicle transmission device according to the present invention is combined with an engine and a motor generator to form a vehicle drive structure. FIG. 4 is a diagram showing the display in a partially exploded view for the sake of simplicity, and in other parts of the display, the display is completely solved in order to avoid redundant descriptions of known structures.
[0017]
In the figure, 10 is an engine, 12 is a motor generator, 14 is a differential gear device for driving a pair of axles 16 and 18, and the remaining portion is a transmission. The transmission device includes a clutch 20 and a speed change mechanism 22 configured here as a gear speed change mechanism, and includes a housing 24. The motor generator 12 includes a stator 12s and a rotor 12r, and is provided in a state where the stator 12s is supported by a housing 24 of the transmission.
[0018]
The transmission device receives the rotational power from the engine 10 at the input shaft 26 constituting the first rotational power receiving end, and the disc-shaped rotating member 28 constituting the second rotational power receiving end from the motor generator 12. It is designed to accept rotational power. That is, the input shaft 26 is connected to the output shaft of the engine 10, and the disc-shaped rotating member 28 carries the rotor 12 r of the motor generator 12. The first and second rotational power receiving ends, that is, the input shaft 26 and the disk member 28 are located on the opposite side to the transmission mechanism 22 with the clutch 20 interposed therebetween, The second rotational power receiving end 28 is connected to the speed change mechanism 22 by a rotational power bridging transmission member 30 extending beyond the clutch 20.
[0019]
More specifically, in the illustrated embodiment, the rotary power bridging transmission member 30 extends along the outer contour of the clutch 20 from one end portion in the axial direction integrally connected to the outer peripheral portion of the disk member 28. It is a thin container-like member extending so as to surround it, and is connected to a shaft member 36 constituting the input shaft of the speed change mechanism 22 by a key or spline 34 at the other axial end 32 thereof in a torque transmission relationship. Thus, it rotates together with the input shaft of the speed change mechanism 22. A disk member 28 that is integrally connected to one end portion in the axial direction of the rotational power bridging transmission member 30 and forms the second rotational power receiving end is a cylindrical member formed at the base of the dish-shaped input member 38 of the clutch 20. The bearing is supported by the bearing portion 40 via the bearing 42. As shown in the figure, when the clutch input member 38 is formed in a general dish shape as this type of clutch input member, an annular space is left outside the outer peripheral edge portion thereof, The motor generator 12 can be disposed in the annular space, the stator 12s is supported from the housing 24, and the rotor 12r is supported by the disk member 28, whereby the motor generator is structurally arranged. Can be located upstream of the clutch and functionally connected to the downstream side of the clutch. The clutch input member 38 is a thick member according to a general example and has a function as a flywheel.
[0020]
The clutch 20 includes the above-described dish-shaped input member 38, an output member 44 having a disk shape as a whole, and an annular pressing member 46 that presses the annular portion of the periphery of the output member against the input member 38 in a frictional engagement relationship. have. The annular portion of the output member 44 is provided with an annular layer 48 of friction braking material on the side facing the input member 38 and an annular layer 50 of friction braking material on the side facing the pressing member 46. The central hub portion 52 of the output member 44 is connected to the shaft member 36 in a torque transmitting relationship by a key or spline 54, and a buffer structure 56 is incorporated in an annular intermediate portion between the annular portion and the hub portion.
[0021]
An annular support member 58 is attached to the peripheral portion of the input member 38 by a plurality of bolts 60, and is arranged radially around the central axis of the clutch by a plurality of fulcrum devices 62 protruding inward from the support member. A plurality of lever members 64 are pivotally supported at their midpoints. The plurality of lever members are connected to the annular pressing member 46 at the radially outer end thereof, and are connected to one annular member 68 of the thrust bearing 66 at the radially inner end thereof. A wave spring 70 is interposed between the outer end of each lever member and the support member 58, whereby the pressing member 46 is biased in the direction toward the input member 38. The thrust bearing 66 has the other annular member 72. The annular member 68 of the thrust bearing 66 can freely rotate with respect to the annular member 72 around their common axis, that is, the central axis of the clutch.
[0022]
When the thrust bearing 66 is biased to the right in the drawing as a whole by the mechanism described below, the lever members 64 swing around the fulcrum device 62 and press against the spring force of the wave spring 70. The member 46 is biased in a direction away from the input member 38 to release the negative pressure at the peripheral edge of the output member 44 between the input member 38 and the pressing member 46, that is, the clutch is released.
[0023]
The end portion 32 of the rotary power bridging transmission member 30 is provided with a plurality of axial holes 74 distributed around the central axis of the clutch, each of which has a pin-like slide member 76 having its axis. It is provided so as to be slidable in the direction. One end of the slide member 76 is connected to the annular member 72 of the thrust bearing 66, and one annular member 80 of another thrust bearing 78 is connected to the other end. A crown-shaped link 84 is connected to the other annular member 82 of the thrust bearing 78 at one end thereof. The shaft member 36 is left at the center of the crown-shaped link 84 and extends through the space. The crown-shaped link 84 is provided with a pair of pins 86 facing one diametrical direction (direction perpendicular to the drawing sheet), and a pivot provided with a pair of fork portions 88 sandwiching the pair of pins. A moving lever 90 is swingably provided about a pivot 92 supported by the transmission housing 24.
[0024]
According to the above configuration, when no control force is applied to the swing lever 90, in the clutch 20, the peripheral portion of the output member 44 is input to the pressing member 46 by the spring force of the wave spring 70. The clutches 20 are engaged with each other and the clutch 20 is engaged. At this time, the engine is connected to a shaft member 36 that forms the input shaft of the gear transmission mechanism 22. On the other hand, when an operating force as indicated by an arrow in the drawing is applied to the operating end 94 of the swing lever 90, the crown-shaped link 84 is biased to the right in the drawing, and accordingly, the thrust bearing 78, The lever member 64 is swung around the fulcrum device 62 through the slide member 76 and the thrust bearing 66, and the clutch 20 is released. Such a clutch release operation is performed by providing the two thrust bearings 78 and 66, so that the rotary power bridge transmission member 30 and the input member 38 or the output of the clutch 20 are output even if the rotary power bridge transmission member 30 is rotating. Even if relative rotation occurs between the members 44, the rotation is performed without being hindered, and thus the motor generator 12 is positioned upstream of the clutch 20 in terms of arrangement and functionally downstream of the clutch 20. It is possible to connect to the side.
[0025]
The gear transmission mechanism 22 may have any known structure. In the illustrated embodiment, the gears 98 and 100 are fixed on a first shaft 96 that is an extension of the shaft member 36, and the gears 102, 104, and 106 are in a freely rotating state. Mounted on a second shaft 108 that is parallel to the first shaft, the gears 110 and 112 that mesh with the gears are in a freely rotating state, and the gears 114, 116, and 118 are fixed. It is attached to the state that was done. Shift switching devices 120, 122, and 124 are provided that achieve the selected shift stage by selectively connecting any one of the above freely rotating gears to the bearing shaft in a torque transmission relationship.
[0026]
In the illustrated embodiment, the first speed stage is achieved when the shift switching device 120 is switched to the right in the figure, and the second speed stage is achieved when it is switched to the left in the figure. When 122 is switched to the right in the figure, the third speed is achieved, and when it is switched to the left in the figure, the fourth speed is achieved, and the shift switching device 124 is switched to the right in the figure. And the fifth speed is achieved. An output gear 126 of a gear transmission mechanism is attached to the right end of the second shaft 108 in the drawing, and the differential gear unit 14 is driven by a gear 128 that meshes with the output gear 126. The reverse gear mechanism is omitted.
[0027]
Although the gear transmission mechanism in FIG. 1 is shown in an illustrative manner, the output gear 126 of the gear transmission mechanism is located downstream of the clutch as shown in this embodiment. When placed close together, taking up a large space for the placement of the motor generator downstream of the clutch cannot be done without a significant increase in the axial dimension of the transmission, In this regard, it will be appreciated that the present invention provides a significant development for vehicle transmissions.
[0028]
Although the present invention has been described in detail with respect to one embodiment thereof, it will be apparent to those skilled in the art that various modifications can be made to these embodiments within the scope of the present invention.
[Brief description of the drawings]
FIG. 1 is a partially exploded view of an embodiment in which a vehicle transmission device according to the present invention is combined with an engine and a motor generator to form a vehicle drive structure, and in other portions. FIG.
[Explanation of symbols]
10 ... Engine, 12 ... Motor generator, 14 ... Differential gear unit, 16, 18 ... Axle, 20 ... Clutch, 22 ... Transmission mechanism, 24 ... Housing, 26 ... Input shaft (first rotational power receiving end), 28 ... Rotating member (second rotational power receiving end), 30 ... Rotary power bridging transmission member, 32 ... End, 34 ... Key or spline, 36 ... Shaft member, 38 ... Clutch input member, 40 ... Bearing portion, 42 ... bearings, 44 ... clutch output member, 46 ... pressing member, 48, 50 ... annular layer of friction braking material, 52 ... output member central hub, 54 ... key or spline, 56 ... buffer structure, 58 ... annular support member, 60 ... bolt, 62 ... fulcrum device, 64 ... lever member, 66 ... thrust bearing, 68 ... annular member, 70 ... wave spring, 72 ... annular member, 74 ... axial hole, 76 ... slide member, 78 ... thrust bearing, 80,82 ... annular member, 84 ... crown link, 86 ... pin, 88 ... fork, 90 ... pivoting lever, 92 ... pivot, 94 ... Sakutan, 96 ... shaft, 98,100,102,104,106 ... gear, 108 ... shaft, 110,112,114,116,118 ... gear, 120, 122, 124 ... gear shifting device, 126, 128 ... gear

Claims (4)

The vehicle has a clutch and a speed change mechanism, and the speed change mechanism is driven by the engine via the clutch and is also driven by a motor generator. A first rotational power receiving end that receives the rotational power and a second rotational power receiving end that receives the rotational power from the motor generator are located on the opposite side of the transmission mechanism with the clutch interposed therebetween. The second rotational power receiving end is coupled to the speed change mechanism by a rotational power bridging transmission member extending beyond the periphery of the clutch, and the clutch is integrally connected to the first rotational power receiving end. A second rotation member connected to the second rotational power receiving end and the second rotational power receiving end in a torque transmission relationship and pressed against the first rotation member in a frictional engagement relationship. A member, pressing means for pressing the second rotating member against the first rotating member in a frictional engagement relationship, and pressing the second rotating member against the first rotating member in a frictional engagement relationship A biasing means for biasing the pressing means, and the pressing means against the biasing means to release the pressing of the second rotating member against the first rotating member in a frictional engagement relationship. Friction engagement release means for biasing the pressing means, and the friction engagement release means transmits friction engagement release force transmission means across the rotational power bridging transmission means, A vehicle transmission device comprising a thrust bearing that allows relative rotation between the frictional engagement release force transmitting means and the pressing means . The friction engagement release means rotates together with the rotary power bridge transmission means, and can slide the rotary power bridge transmission means in the axial direction, a slide member bias means for biasing the slide member, and the rotational power And a thrust bearing for transmitting the bias between the slide member biasing means and the slide member while allowing the slide member to rotate around the rotation center axis of the bridging transmission means. The vehicle transmission device according to claim 1. The rotational power bridging transmission member is integrally connected to the second rotational power receiving end at one end in the axial direction and connected to the rotational power input end of the transmission mechanism in a torque transmission relationship at the other axial end. a member that rotates integrally with the rotational power input end of the speed change mechanism, the second rotational power receiving end according to claim 1 or 2, characterized in that it is bearing supporting the input-side member of the clutch Vehicle transmission. The transmission mechanism includes an input shaft, an output shaft arranged in parallel to the input shaft, a plurality of transmission gear pairs that are respectively supported on the input shaft and the output shaft and mesh with each other, and a plurality of the transmission gear pairs. A shift switching means for selectively transmitting a selected transmission gear pair to a torque transmission state, and a rotational power take-out end on the output shaft side is the same as a rotational power input end on the input shaft side The vehicle transmission device according to any one of claims 1 to 3 , wherein the transmission device is a gear transmission mechanism at an end in the axial direction.

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