CN110345209B - Speed change gear and automobile - Google Patents
Speed change gear and automobile Download PDFInfo
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- CN110345209B CN110345209B CN201910577592.6A CN201910577592A CN110345209B CN 110345209 B CN110345209 B CN 110345209B CN 201910577592 A CN201910577592 A CN 201910577592A CN 110345209 B CN110345209 B CN 110345209B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 113
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- 230000009194 climbing Effects 0.000 description 2
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- 239000007769 metal material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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Abstract
The application discloses speed change gear and car belongs to mechanical technical field. The transmission device includes: the transmission comprises an input shaft, a first planetary gear set, a transmission piece, a second planetary gear set and an output shaft; the first planetary gear set, the transmission piece and the second planetary gear set are coaxially arranged on the input shaft, and the sun gear axis of the first planetary gear set, the axis of the transmission piece and the sun gear axis of the second planetary gear set are coincident with the axis of the input shaft; the planet carrier of the second planetary gear set is connected with the output shaft; in a first operating mode, a connection is formed between the carrier of the first planetary gear set and the first input of the transmission element; in a second operating mode, a connection is formed between the sun gear of the first planetary gear set and the second input of the transmission. The speed change device can achieve the purposes of reducing the rotating speed of the output shaft and improving the output torque.
Description
Technical Field
The embodiment of the application relates to the technical field of machinery, in particular to a speed changing device and an automobile.
Background
The gearbox is a very important part on the automobile, can change the transmission ratio, and expand the change range of the torque and the rotating speed of the driving wheel so as to adapt to the frequently changing running conditions, and simultaneously, the transmitter can work under the favorable working condition (higher power and lower oil consumption).
The gearbox typically includes a plurality of gears, with a low gear being slow but high torque and a high gear being fast but low torque. When climbing a slope, a low gear is usually used to control the vehicle to advance, and sufficient torque is provided for the vehicle through the low gear to ensure that the vehicle has sufficient power to climb the slope.
However, in some special road sections (such as steep slopes), the lowest gear of the gearbox still cannot provide enough torque, and the situation that climbing is difficult or even cannot be completed easily occurs, so that safety problems are easily caused.
Disclosure of Invention
The embodiment of the application provides a speed changing device and an automobile. The technical scheme is as follows:
in one aspect, an embodiment of the present application provides a speed change device, including: the transmission comprises an input shaft, a first planetary gear set, a transmission piece, a second planetary gear set and an output shaft;
the first planetary gear set, the transmission piece and the second planetary gear set are coaxially arranged on the input shaft, and the sun gear axis of the first planetary gear set, the axis of the transmission piece and the sun gear axis of the second planetary gear set are coincident with the axis of the input shaft;
the planet carrier of the second planetary gear set is connected with the output shaft;
in a first operating mode, a connection is formed between the planet carrier of the first planetary gear set and the first input end of the transmission member, and the transmission path of the power is as follows: the input shaft, the planet wheels of the first planetary gear set, the planet carrier of the first planetary gear set, the transmission part, the planet wheels of the second planetary gear set, the planet carrier of the second planetary gear set, the output shaft;
in a second operating mode, a connection is formed between the sun gear of the first planetary gear set and the second input end of the transmission element, and the transmission path of the power is as follows: the input shaft, the sun gear of the first planetary gear set, the transmission member, the planet gear of the second planetary gear set, the planet carrier of the second planetary gear set, and the output shaft.
Optionally, the transmission further comprises a first coupling member;
the first end of the first connecting piece is fixedly connected with the planet carrier of the first planetary gear set;
the first input end of the transmission piece is provided with a first gear shifting tooth;
and a first gear shifting tooth fixing groove matched with the first gear shifting tooth is formed at the second end of the first connecting piece.
Optionally, the first shifting tooth fixing groove is annular, at least two first fixing teeth matched with the first shifting tooth exist in the first shifting tooth fixing groove, and a first smooth protruding portion is formed between every two adjacent first fixing teeth.
Optionally, the transmission further comprises a second connector;
the first end of the second connecting piece is fixedly connected with the sun gear of the first planetary gear set;
a second end of the second connecting piece is provided with a second gear shifting tooth;
and a second gear shifting tooth fixing groove matched with the second gear shifting tooth is formed at the second input end of the transmission member.
Optionally, the second shift tooth fixing groove is annular, at least two second fixing teeth matched with the second shift tooth exist in the second shift tooth fixing groove, and a second smooth protruding portion is formed between every two adjacent second fixing teeth.
Optionally, the transmission further comprises: and the electromagnetic shifting fork is used for controlling the speed change device to switch between the first working state and the second working state.
Optionally, the electromagnetic fork comprises: the device comprises a shell, a first fixed block, a second fixed block, a movable block and a shifting fork piece, wherein the first fixed block, the second fixed block and the movable block are arranged in the shell;
the positions of the first fixed block and the second fixed block are fixed;
the movable block is positioned between the first fixed block and the second fixed block, and the movable block is electromagnetically coupled with the first fixed block and the second fixed block respectively;
one end of the shifting fork piece is connected with the movable block, and the other end of the shifting fork piece is connected with the planet carrier of the first planetary gear set.
Optionally, elastic members are respectively arranged between the movable block and the first fixed block and between the movable block and the second fixed block.
Optionally, a limit baffle is arranged between the movable block and the side edge of the shell;
the movable block is provided with a limiting baffle, and a protruding part is formed on one surface of the movable block opposite to the limiting baffle, and a groove part matched with the protruding part is formed on the limiting baffle.
In another aspect, embodiments of the present application provide an automobile including a transmission device according to the above aspect.
The technical scheme provided by the embodiment of the application can bring the following beneficial effects:
the speed change device comprises an input shaft, a first planetary gear set, a transmission piece, a second planetary gear set and an output shaft, the speed change device comprises a first working mode and a second working mode, the input shaft provides power for the planetary gear sets, and the planetary gear sets drive the output shaft to rotate so as to achieve the purposes of reducing the rotating speed of the output shaft and improving the output torque. For example, by fitting the transmission between the transmission and the differential of the automobile, a larger torque than the lowest gear of the transmission can be provided, so that the automobile can smoothly pass through a special section such as a steep slope.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a transmission according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating the power transmission path of the transmission in a first operating mode;
FIG. 3 is a schematic diagram illustrating the power transmission path of the transmission in a second operating mode;
fig. 4 shows a schematic illustration of a shift tooth securing groove;
fig. 5 shows a schematic illustration of a shift tooth and a shift tooth securing groove;
FIG. 6 illustrates a schematic view of an electromagnetic fork;
FIG. 7 is a simplified block diagram of an automobile provided by an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a block diagram of a transmission 1 according to an embodiment of the present application is shown. The transmission device 1 may include: an input shaft 10 (shown in fig. 1 with diagonal fill), a first planetary gear set 20, a transmission 30 (shown in fig. 1 with black dot fill), a second planetary gear set 40, and an output shaft 50 (shown in fig. 1 with cross-hatch fill).
As shown in fig. 1, the axis of the input shaft 10 coincides with the axis of the output shaft 50.
The first planetary gear set 20 includes a sun gear 21, planet gears 22, a planet carrier 23, and a planet ring 24. The second planetary gear set 40 includes a sun gear, planet gears 42, a planet carrier 43, and a planet ring 44. In fig. 2, the output 33 of the transmission member 30 is merely used as a sun gear of the second planetary gear set 40, in which case the output 33 of the transmission member 30 has an external gear, so that it meshes with the planet gears 42 of the second planetary gear set 40. In other possible embodiments, the sun gear of the second planetary gear set 40 can be annular, with an outer gear on the outside which meshes with the planet gears 42 of the second planetary gear set 40 and an inner gear on the inside which meshes with the outer gear of the output 33 of the transmission 30.
The first planetary gear set 20, the transmission member 30 and the second planetary gear set 40 are coaxially disposed on the input shaft 10, and the axial line of the sun gear 21 of the first planetary gear set 20, the axial line of the transmission member 30 and the axial line of the sun gear of the second planetary gear set 40 coincide with the axial line of the input shaft 10.
As shown in fig. 1, a connection is formed between the carrier 43 of the second planetary gear set 40 and the output shaft 50. Alternatively, a fixed connection is formed between the carrier 43 of the second planetary gear set 40 and the output shaft 50.
The transmission 1 comprises two operating modes: a first mode of operation and a second mode of operation.
In the first operating mode, a connection is formed between the carrier 23 of the first planetary gear set 20 and the first input 31 of the transmission element 30. Furthermore, the sun gear 21 of the first planetary gear set 20 is disconnected from the second input 32 of the transmission 30. As shown in fig. 2, the power transmission paths are, in order: an input shaft 10, planet wheels 22 of the first planetary gear set 20, a planet carrier 23 of the first planetary gear set 20, a transmission member 30, planet wheels 42 of the second planetary gear set 40, a planet carrier 43 of the second planetary gear set 40, an output shaft 50. For example, the input shaft 10 rotates the sun gear 21 of the first planetary gear set 20, the sun gear 21 of the first planetary gear set 20 rotates the planet gears 22 of the first planetary gear set 20, the planet gears 22 of the first planetary gear set 20 rotate the planet carrier 23 of the first planetary gear set 20, the planet carrier 23 of the first planetary gear set 20 rotates the transmission member 30, the transmission member 30 rotates the planet gears 42 of the second planetary gear set 40, the planet gears 42 of the second planetary gear set 40 rotate the planet carrier 43 of the second planetary gear set 40, and the planet carrier 43 of the second planetary gear set 40 rotates the output shaft 50.
In the second operating mode, a connection is formed between the sun gear 21 of the first planetary gear set 20 and the second input 32 of the transmission 30. The carrier 23 of the first planetary gear set 20 is also disconnected from the first input 31 of the transmission 30. As shown in fig. 3, the power transmission paths are, in order: an input shaft 10, a sun gear 21 of the first planetary gear set 20, a transmission member 30, planet gears 42 of the second planetary gear set 40, a planet carrier 43 of the second planetary gear set 40, an output shaft 50. For example, the input shaft 10 rotates the sun gear 21 of the first planetary gear set 20, the sun gear 21 of the first planetary gear set 20 rotates the transmission member 30, the transmission member 30 rotates the planet gears 42 of the second planetary gear set 40, the planet gears 42 of the second planetary gear set 40 rotate the planet carrier 43 of the second planetary gear set 40, and the planet carrier 43 of the second planetary gear set 40 rotates the output shaft 50.
Optionally, the transmission 1 further comprises a non-operative mode. In the inoperative mode, the carrier 23 of the first planetary gear set 20 is disconnected from the first input 31 of the transmission 30, and the sun gear 21 of the first planetary gear set 20 is disconnected from the second input 32 of the transmission 30. In this case, the power transmission paths are: input shaft 10, output shaft 50. That is, the input shaft 10 directly drives the output shaft 50 to rotate, the input shaft 10 directly transmits power to the output shaft 50 for output, and the rotation speed of the output shaft 50 is the same as that of the input shaft 10, i.e. the output shaft 50 is correspondingly driven to rotate one turn each time the input shaft 10 rotates one turn.
In the first and second operation modes, the input shaft 10 does not directly drive the output shaft 50 to rotate, but the rotation speed of the output shaft 50 is less than that of the input shaft 10 through the action of the planetary gear set, that is, the rotation speed ratio of the input shaft 10 to the output shaft 50 is greater than 1. The ratio of the rotational speed of the input shaft 10 to the rotational speed of the output shaft 50 is determined by the design of the planetary gear set.
A planetary gear set is a device for achieving speed change. The planetary gear set includes a sun gear, planet gears, a planet carrier, and a planet ring. The sun gear is the sun gear of the planetary gear set, meshes with the planet gears throughout the planetary gear set, and has a fixed axial position. The sun gear is also referred to as the sun gear. A planet gear is a gear of a planetary gear set that has a moving axis. The planet wheels are also referred to as planet gears. The sun gear and the planet gear are external gears, and the rotation directions of the sun gear and the planet gear are opposite when the sun gear and the planet gear are meshed. The sun wheel is used as a driving part, the planet wheel is used as a driven part, and the sun wheel drives the planet wheel to rotate. The carrier is a member that supports a planetary gear shaft and rotates around a sun gear axis in the planetary gear set. The planet carrier may also be referred to as a planet carrier. The planetary ring has an inner gear which meshes with the planetary gears, and the inner gear and the outer gear mesh with each other, and both have the same rotation direction. The planet ring may also be referred to as a ring gear or annulus gear, etc. The number of planet gears depends on the design load of the planetary gear set, and usually there are three or four, with the greater the number the greater the load.
The structural descriptions of the first planetary gear set 20 and the second planetary gear set 40 referred to in the embodiments of the present application may be referred to above with respect to the structural descriptions of the planetary gear sets. In addition, the size of each gear included in each of the first planetary gear set 20 and the second planetary gear set 40, and the number of the planetary gears may be related according to actual requirements, and the embodiment of the present application is not limited thereto.
The transmission 1 according to the embodiment of the present application may be used in an automobile, for example, one end of the input shaft 10 is connected to an output shaft of a transmission of the automobile, and one end of the output shaft 50 is connected to a differential of the automobile. In this way, in some special road sections (such as steep slopes), if the lowest gear of the gearbox still cannot be used to provide sufficient torque, the transmission 1 can be controlled to operate in the first operating mode or the second operating mode, so that the vehicle can smoothly pass through the special road sections. In addition, the first operation mode can provide a larger torque than the second operation mode because the rotation speed ratio of the input shaft 10 to the output shaft 50 is larger in the first operation mode. In the event that it is not necessary to provide more torque, the transmission 1 can be placed in a non-operating mode, with the input shaft 10 directly carrying the output shaft 50 in rotation.
Alternatively, as shown in fig. 1, the transmission device 1 further includes a shift mechanism 60, and the shift mechanism 60 is used to control the transmission device to switch between the non-operation mode, the first operation mode, and the second operation mode.
In summary, in the technical scheme provided in the embodiment of the present application, a speed change device is designed to include an input shaft, a first planetary gear set, a transmission member, a second planetary gear set, and an output shaft, where the speed change device includes a first operating mode and a second operating mode, the input shaft provides power to the planetary gear set, and the planetary gear set drives the output shaft to rotate, so as to achieve the purposes of reducing the rotation speed of the output shaft and increasing the output torque. For example, by fitting the transmission between the transmission and the differential of the automobile, a larger torque than the lowest gear of the transmission can be provided, so that the automobile can smoothly pass through a special section such as a steep slope.
In addition, the speed changing device provided by the embodiment of the application comprises a first working mode and a second working mode, and the two working modes can provide output torques with two different magnitudes, provide multiple choices and have more flexibility.
In an exemplary embodiment, as shown in fig. 1, the transmission 1 may further include a first connecting member 70. The first end of the first connecting element 70 is fixedly connected to the carrier 23 of the first planetary gear set 20; a first input end 31 of the transmission member 30, formed with first gear shifting teeth; the second end of the first link 70 is formed with a first shift tooth fixing groove 71 fitted with the first shift tooth.
When the transmission 1 is in the first operating mode, the first shift tooth engages with the first shift tooth fixing groove 71, so that the first coupling member 70 can rotate the transmission member 30. In the embodiment of the present application, the number of the first shift teeth is not limited, and the first shift teeth may include one or more first shift teeth. Accordingly, the first shift tooth fixing groove 71 has a ring shape, and the first shift tooth fixing groove 71 includes first fixing teeth adapted to the first shift teeth. The number of the first fixing teeth is not limited, and the first fixing teeth may include one or more. Optionally, the first shift teeth and the first fixed teeth are the same number. In addition, at least one first smooth protrusion is formed in the first shift tooth fixing groove 71.
Alternatively, referring to fig. 4 and 5 in combination, the first shift tooth fixing groove 71 is annular, and there are at least two first fixing teeth 72 fitted to the first shift tooth 31a in the first shift tooth fixing groove 71, and a first smooth protruding portion 73 is formed between two adjacent first fixing teeth 72. Alternatively, the first smooth protruding portion 73 is located at the middle position of two adjacent first fixing teeth 72. Alternatively, the height of the first smooth protruding portion 73 is the same as the groove depth of the first shift tooth fixing groove 71.
In an exemplary embodiment, as shown in fig. 1, the transmission 1 may further include a second link 80. A first end of the second connecting member 80 is fixedly connected with the sun gear 21 of the first planetary gear set 20; a second end of the second link 80 formed with a second shift tooth 81; the second input end 32 of the transmission member 30 is formed with a second shift tooth fixing groove adapted to the second shift tooth 81.
When the transmission 1 is in the second operating mode, the second shift tooth 81 engages with the second shift tooth fixing groove, so that the second connecting element 80 can drive the transmission element 30 to rotate. In the embodiment of the present application, the number of the second shift teeth 81 is not limited, and the second shift teeth 81 may include one or more. Correspondingly, the second gear shifting tooth fixing groove is annular, and the second gear shifting tooth fixing groove comprises second fixing teeth matched with the second gear shifting teeth. The number of the second fixing teeth is not limited, and the second fixing teeth may include one or more than one. Alternatively, the number of the second shift teeth 81 and the second fixing teeth is the same. In addition, at least one second smooth projection is formed in the second shift tooth fixing groove.
Alternatively, the second shift tooth fixing groove is annular, and at least two second fixing teeth matched with the second shift tooth 81 exist in the second shift tooth fixing groove, and a second smooth convex part is formed between every two adjacent second fixing teeth. Optionally, the second smooth convex part is positioned at the middle position of two adjacent second fixing teeth. Optionally, the height of the second smooth projection is the same as the groove depth of the second shift tooth securing groove.
In this application embodiment, with the help of the smooth bulge in the tooth fixed slot of shifting for speed change gear can autosegregation between first connecting piece and the driving medium when withdrawing from first mode, and speed change gear can autosegregation between second connecting piece and the driving medium when withdrawing from second mode, need not to separate connecting piece and driving medium through relevant part, simplifies hardware structure, reduces hardware cost.
In an exemplary embodiment, the shift mechanism 60 described in the above embodiments may be an electromagnetic fork. For example, as shown in fig. 6, the electromagnetic fork may include: the device comprises a shell 61, a first fixed block 62, a second fixed block 63 and a movable block 64 which are arranged in the shell 61, and a shifting fork member 65 connected with the movable block 64.
The positions of the first fixing block 62 and the second fixing block 63 are fixed. The movable block 64 is located between the first fixed block 62 and the second fixed block 63, and the movable block 64 is electromagnetically coupled to the first fixed block 62 and the second fixed block 63, respectively. One end of the fork member 65 is connected to the movable block 64, and the other end of the fork member 65 is connected to the carrier 23 of the first planetary gear set 20 in the transmission device 1 described above. Here, the connection between the other end of the fork 65 and the carrier 23 of the first planetary gear set 20 may be a direct connection or an indirect connection, which is not limited in the embodiment of the present application. For example, the other end of the fork 65 can be connected to the first connecting element 70, so that a connection is formed indirectly with the carrier 23 of the first planetary gear set 20.
In one example, the first fixed block 62 and the second fixed block 63 are magnets having the same magnetic property, and the movable block 64 is an electromagnet. In another example, the first fixed block 62 and the second fixed block 63 are electromagnets, and the movable block 64 is a magnetic metal material. The magnetic metal material is a material that can be attracted by a magnet, such as iron, nickel, cobalt, and the like. In another example, the first fixed block 62 and the second fixed block 63 are electromagnets, and the movable block 64 is also an electromagnet.
In the embodiment of the present application, the shift fork 65 is driven to move by electromagnetic control, and then the first planetary gear set 20 is driven to move in different position states by the shift fork 65, so as to switch the operating modes of the gear shifting device 1.
Alternatively, between the movable block 64 and the first and second fixed blocks 62 and 63, elastic members, such as springs, are respectively provided. Thus, when there is no magnetic force between the movable block 64 and the first and second fixed blocks 62 and 63, the movable block 64 can be rapidly controlled by the elastic member to be reset.
Optionally, a limit baffle is arranged between the movable block 64 and the side edge of the shell 61; the movable block 64 is provided with a protruding part on the surface opposite to the limiting baffle plate, and a groove part matched with the protruding part is formed on the limiting baffle plate. Thus, in the reset state of the movable block 64, the protrusion of the movable block 64 is located in the groove portion, so that the position of the movable block 64 is more stable.
In this application embodiment, an electromagnetism shift fork is provided, drives shift fork spare through electromagnetic control and removes, and then carries out shift control through shift fork spare, can realize the efficient control of shifting gears.
An exemplary embodiment of the present application also provides an automobile including the transmission as described in the above embodiment. Alternatively, as shown in fig. 7, the automobile 2 includes: the transmission case 3, the differential 4, and the transmission device 1 described in the above embodiment; wherein, the output shaft of the gearbox 3 is connected with the input shaft of the speed changing device 1, and the output shaft of the speed changing device 1 is connected with the differential 4.
By fitting the transmission between the gearbox and the differential of a motor vehicle, a higher torque can be provided than in the lowest gear of the gearbox, so that the motor vehicle can smoothly pass through special sections such as steep slopes.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. A transmission device, characterized by comprising: the transmission comprises an input shaft, a first planetary gear set, a transmission piece, a second planetary gear set, an output shaft, a first connecting piece, a second connecting piece and an electromagnetic shifting fork, wherein the electromagnetic shifting fork is used for controlling the speed change device to switch between a first working mode and a second working mode; the speed change device is assembled between a gearbox and a differential of an automobile, one end of an input shaft of the speed change device is connected with an output shaft of the gearbox, and one end of an output shaft of the speed change device is connected with the differential;
the first planetary gear set, the transmission piece and the second planetary gear set are coaxially arranged on an input shaft of the speed change device, and a sun gear axis of the first planetary gear set, an axis of the transmission piece and an axis of a sun gear of the second planetary gear set are coincident with an axis of the input shaft of the speed change device;
the planet carrier of the second planetary gear set is connected with the output shaft of the speed changing device;
the first end of the first connecting piece is fixedly connected with the planet carrier of the first planetary gear set; the first input end of the transmission member is provided with a first gear shifting tooth; a first gear shifting tooth fixing groove matched with the first gear shifting tooth is formed at the second end of the first connecting piece;
the first end of the second connecting piece is fixedly connected with the sun gear of the first planetary gear set; a second gear shifting tooth is formed at the second end of the second connecting piece; a second gear shifting tooth fixing groove matched with the second gear shifting tooth is formed at the second input end of the transmission member;
the output end of the transmission piece is used as a sun gear of the second planetary gear set;
a shifting fork piece of the electromagnetic shifting fork is connected with the first connecting piece, so that indirect connection is formed between the shifting fork piece and a planet carrier of the first planetary gear set through the first connecting piece;
the shifting fork member is driven to move towards a first direction through electromagnetic control, the shifting fork member drives the first connecting piece, the first planetary gear set and the second connecting piece to integrally move towards the first direction, so that the first shifting tooth on the transmission piece is meshed with the first shifting tooth fixing groove on the first connecting piece, and the second shifting tooth on the second connecting piece is separated from the second shifting tooth fixing groove on the transmission piece, and therefore the first working mode is achieved; in the first operating mode, the engagement of the first shift tooth on the transmission member with the first shift tooth fixing groove on the first connecting member causes a connection between the planet carrier of the first planetary gear set and the first input end of the transmission member, and the disengagement of the second shift tooth on the second connecting member with the second shift tooth fixing groove on the transmission member causes a disconnection between the sun gear of the first planetary gear set and the second input end of the transmission member, and the transmission path of power sequentially: the input shaft of the speed changing device drives the sun gear of the first planetary gear set to rotate, the sun gear of the first planetary gear set drives the planet gears of the first planetary gear set to rotate, the planet gears of the first planetary gear set drive the planet carrier of the first planetary gear set to rotate, the planet carrier of the first planetary gear set drives the transmission member to rotate, the transmission member drives the planet gears of the second planetary gear set to rotate, the planet gears of the second planetary gear set drive the planet carrier of the second planetary gear set to rotate, and the planet carrier of the second planetary gear set drives the output shaft of the speed changing device to rotate;
the shifting fork member is driven to move towards a second direction through electromagnetic control, the shifting fork member drives the first connecting piece, the first planetary gear set and the second connecting piece to integrally move towards the second direction, so that the second shifting tooth on the second connecting piece is meshed with the second shifting tooth fixing groove on the transmission piece, the first shifting tooth on the transmission piece is separated from the first shifting tooth fixing groove on the first connecting piece, and the second working mode is entered; in the second operating mode, the engagement of the second shift tooth on the second connecting member with the second shift tooth fixing groove on the transmission member causes a connection between the sun gear of the first planetary gear set and the second input end of the transmission member, and the disengagement of the first shift tooth on the transmission member from the first shift tooth fixing groove on the first connecting member causes a disconnection between the planet carrier of the first planetary gear set and the first input end of the transmission member, and the transmission path of power sequentially includes: the input shaft of the speed changing device drives the sun gear of the first planetary gear set to rotate, the sun gear of the first planetary gear set drives the transmission member to rotate, the transmission member drives the planet gear of the second planetary gear set to rotate, the planet gear of the second planetary gear set drives the planet carrier of the second planetary gear set to rotate, and the planet carrier of the second planetary gear set drives the output shaft of the speed changing device to rotate;
wherein the first direction and the second direction are opposite directions.
2. The transmission device according to claim 1, wherein the first shift tooth fixing groove has a ring shape, and at least two first fixing teeth fitted to the first shift tooth exist in the first shift tooth fixing groove, and a first smooth protrusion is formed between adjacent two first fixing teeth.
3. The transmission device according to claim 1, wherein the second shift tooth fixing groove has a ring shape, and at least two second fixing teeth fitted to the second shift tooth exist in the second shift tooth fixing groove, and a second smooth protrusion is formed between two adjacent second fixing teeth.
4. The transmission of claim 1, wherein the electromagnetic fork comprises: the device comprises a shell, a first fixed block, a second fixed block, a movable block and a shifting fork piece, wherein the first fixed block, the second fixed block and the movable block are arranged in the shell;
the positions of the first fixed block and the second fixed block are fixed;
the movable block is positioned between the first fixed block and the second fixed block, and the movable block is electromagnetically coupled with the first fixed block and the second fixed block respectively;
one end of the shifting fork piece is connected with the movable block, and the other end of the shifting fork piece is connected with the planet carrier of the first planetary gear set.
5. The transmission of claim 4, wherein a resilient member is disposed between the movable mass and each of the first and second fixed masses.
6. The transmission according to claim 5,
a limit baffle is arranged between the movable block and the side edge of the shell;
the movable block is provided with a limiting baffle, and a protruding part is formed on one surface of the movable block opposite to the limiting baffle, and a groove part matched with the protruding part is formed on the limiting baffle.
7. A vehicle, characterized in that the vehicle comprises a transmission according to any one of claims 1 to 6.
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| CN201910577592.6A CN110345209B (en) | 2019-06-28 | 2019-06-28 | Speed change gear and automobile |
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| CN201910577592.6A CN110345209B (en) | 2019-06-28 | 2019-06-28 | Speed change gear and automobile |
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| CN110345209A CN110345209A (en) | 2019-10-18 |
| CN110345209B true CN110345209B (en) | 2021-07-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114294382A (en) * | 2019-06-28 | 2022-04-08 | 江苏美械变速箱有限公司 | Gear shifting mechanism of gearbox and gearbox |
| CN112901754B (en) * | 2021-01-14 | 2023-11-21 | 北京福田戴姆勒汽车有限公司 | Integrated device of bidirectional rotary power takeoff, gearbox and power takeoff |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102010031744B4 (en) * | 2010-07-21 | 2014-07-31 | Schaeffler Technologies Gmbh & Co. Kg | drive unit |
| JP5324610B2 (en) * | 2011-03-24 | 2013-10-23 | ジヤトコ株式会社 | Automatic transmission |
| US9005071B2 (en) * | 2012-01-27 | 2015-04-14 | Deere & Company | Flexible and scalable multi-ratio planetary transmission |
| CN107023671A (en) * | 2017-05-03 | 2017-08-08 | 重庆市綦江源泉机电有限公司 | Two gear synchronizer manual transmissions |
| US10533640B2 (en) * | 2017-07-05 | 2020-01-14 | GM Global Technology Operations LLC | Two ratio electric drive unit |
| DE102017007088A1 (en) * | 2017-07-27 | 2019-01-31 | Daimler Ag | Planetary gear device for an electric drive system |
| CN107542861A (en) * | 2017-10-25 | 2018-01-05 | 上海伊控动力系统有限公司 | A kind of two grades of pure electric shift casees |
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