Transmission assembly

Abstract

The utility model discloses a transmission assembly, which comprises a transmission shell and a transmission shaft, the transmission mechanism is arranged in the transmission shell and comprises an input shaft component, an intermediate shaft component, a synchronizer component and a differential component, the input shaft component is in transmission connection with the intermediate shaft component, the synchronizer component is connected with the intermediate shaft component, and the intermediate shaft component is in transmission connection with the differential component; the gear shifting executing mechanism is arranged in the transmission shell and comprises a gear shifting motor, a power transmission part and a gear shifting part, the power transmission part is connected with an output shaft of the gear shifting motor, and the power transmission part is in transmission connection with the gear shifting part so that power output by the gear shifting motor can be transmitted to the gear shifting part to achieve gear shifting. The transmission mechanism and the gear shifting executing mechanism are integrated in the transmission shell, on the premise that functions are achieved, the number of parts of the two-gear transmission is reduced, the structure is simple but compact, cost is reduced, and the two-gear transmission can be suitable for automobiles of various sizes and is high in adaptability.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle transmissions, in particular to a transmission assembly. Background Art

[0002] Existing two-speed transmissions for electric vehicles include: a drive motor (including a motor rotor); a planetary gear (including a sun gear, front ring gear, planetary carrier, front planetary gears, and planetary gear shafts); a differential (including a differential housing); a right drive shaft, a left drive shaft, left and right axle gears, a first clutch, a second clutch; an input shaft, a low-speed driving gear, a low-speed driven gear, a high-speed driving gear, a high-speed driven gear, a constant-mesh gear, and an intermediate shaft. These transmissions have the following drawbacks: numerous components, a complex structure, and high cost; they occupy a large space; and they are not adaptable to vehicles with different assembly spaces. Utility Model Content

[0003] The purpose of the utility model is to provide a transmission assembly to solve the problems of complex structure and poor adaptability of existing electric vehicle transmissions.

[0004] The utility model provides a transmission assembly, comprising:

[0005] transmission housing;

[0006] a transmission mechanism disposed in the transmission housing, the transmission mechanism comprising an input shaft component, an intermediate shaft component, a synchronizer component, and a differential component, the input shaft component being in driving connection with the intermediate shaft component, the synchronizer component being connected to the intermediate shaft component, and the intermediate shaft component being in driving connection with the differential component;

[0007] The shift actuator is arranged in the transmission housing, and the shift actuator includes a shift motor, a power transmission part and a shift part. The power transmission part is connected to the output shaft of the shift motor, and the power transmission part is connected to the shift part in a transmission connection. The power transmission part is used to transmit the power output by the shift motor to the shift part to achieve shifting.

[0008] In the transmission assembly as described above, preferably, the input shaft component includes an input shaft, a first driving gear and a second driving gear, and the first driving gear and the second driving gear are both provided on the input shaft.

[0009] A transmission assembly as described above, wherein preferably, the intermediate shaft component includes an intermediate shaft, a first driven gear and a second driven gear, the first driven gear and the second driven gear are both provided on the intermediate shaft, the first driven gear is engaged with the first driving gear, and the second driven gear is engaged with the second driving gear.

[0010] In the transmission assembly as described above, preferably, both the first driven gear and the second driven gear are connected to the intermediate shaft via needle bearings.

[0011] In the transmission assembly as described above, preferably, the synchronizer component is provided on the intermediate shaft, and the synchronizer component is located between the first driven gear and the second driven gear.

[0012] In the transmission assembly as described above, preferably, the gear hub of the synchronizer component is connected to the outer diameter of the intermediate shaft via a spline.

[0013] In the transmission assembly as described above, preferably, the differential component includes a differential and a differential gear, the intermediate shaft is provided with a transmission gear, and the differential gear is meshed with the transmission gear.

[0014] A transmission assembly as described above, wherein preferably, the power transmission part includes a worm, a worm wheel and a worm wheel shaft, the worm is connected to the output shaft of the shift motor, the worm wheel is provided on the worm wheel shaft, and the worm is meshed with the worm wheel.

[0015] A transmission assembly as described above, wherein preferably, the shift part includes a shift fork, a shift fork shaft and a connecting member, the shift fork is provided on the shift fork shaft, and the connecting member is used to connect the worm gear and the shift fork, and when the worm rotates, the worm gear can transmit power to the shift fork, so that the shift fork moves back and forth along the shift fork shaft.

[0016] A transmission assembly as described above, wherein preferably, the connecting member includes a connecting seat and a connecting block, the connecting seat is arranged on the shift fork, a mounting groove is provided on the connecting seat, one end of the connecting block is connected to the worm gear, and the other end of the connecting block is arranged in the mounting groove.

[0017] Compared with the existing technology, the utility model integrates the transmission mechanism and the shift actuator into the transmission housing, reducing the number of parts of the two-speed transmission while ensuring the realization of the function. The structure is simple but compact, reducing costs, and can be applied to cars with different assembly spaces, with strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a transmission assembly provided by an embodiment of the present utility model.

[0019] Description of reference numerals:

[0020] 10- Transmission housing;

[0021] 20-transmission mechanism, 21-input shaft component, 211-input shaft, 212-first driving gear, 213-second driving gear, 22-intermediate shaft component, 221-intermediate shaft, 222-first driven gear, 223-second driven gear, 224-transmission gear, 23-synchronizer component, 24-differential component, 241-differential gear;

[0022] 30-shift actuator, 31-shift motor, 32-power transmission unit, 321-worm, 322-worm gear, 323-worm gear shaft, 33-shift unit, 331-shift fork, 332-shift fork shaft, 333-connecting piece, 3331-connecting seat, 3332-mounting slot, 3333-connecting block, 3334-elastic pin. DETAILED DESCRIPTION

[0023] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] Reference Figure 1 As shown, the present invention provides a transmission assembly, including a transmission housing 10, a transmission mechanism 20 and a shift actuator 30, wherein:

[0025] The transmission mechanism 20 is disposed within the transmission housing 10 and is primarily used for power transmission. The transmission mechanism 20 includes an input shaft 21, an intermediate shaft 22, a synchronizer 23, and a differential 24. The input shaft 21 is drivingly connected to the intermediate shaft 22, the synchronizer 23 is connected to the intermediate shaft 22, and the intermediate shaft 22 is drivingly connected to the differential 24. When power is input, the input shaft 21 transmits the power to the intermediate shaft 22, which in turn transmits the power to the differential 24, thereby enabling the vehicle to travel in a straight line or turn.

[0026] The shift actuator 30 is located within the transmission housing 10 and is primarily used to adjust the vehicle's gear position, enabling functions such as shifting, parking, and reversing. The shift actuator 30 includes a shift motor 31, a power transmission unit 32, and a shift unit 33. The power transmission unit 32 is connected to the output shaft of the shift motor 31, and the shift unit 33 is in driving connection with the power transmission unit 32. The power transmission unit 32 is used to transmit the power output from the shift motor 31 to the shift unit 33 to achieve gear shifting.

[0027] The transmission assembly of the present application integrates the transmission mechanism 20 and the shift actuator 30 into a transmission housing 10. On the premise of being able to realize the functions of the transmission mechanism 20 and the shift actuator 30, the number of components included in the two-speed transmission is reduced. The various components of the transmission mechanism 20 and the shift actuator 30 integrated in the transmission housing 10 are compactly structured in the transmission housing 10, which simplifies the structure of the transmission and reduces production costs. Compared with the transmission in the prior art, the transmission assembly of the present application has a small space occupancy rate and can be applied to vehicles with different assembly spaces, thereby improving adaptability.

[0028] In the embodiment provided herein, the input shaft component 21 includes an input shaft 211, a first driving gear 212, and a second driving gear 213. The first driving gear 212 and the second driving gear 213 are sequentially arranged on the input shaft 211 along the axis of the input shaft 211. The first driving gear 212 is a high-speed driving gear, and the second driving gear 213 is a low-speed driving gear. The intermediate shaft component 22 includes an intermediate shaft 221, a first driven gear 222, and a second driven gear 223. The first driven gear 222 and the second driven gear 223 are sequentially arranged on the intermediate shaft 221 along the axis of the intermediate shaft 221. The first driven gear 222 is a high-speed driven gear, and the second driven gear 223 is a low-speed driven gear. The first driving gear 212 meshes with the first driven gear 222, and the second driving gear 213 meshes with the second driven gear 223. When power is transmitted to the input shaft 211, the first driving gear 212 transmits the power to the first driven gear 222, or the second driving gear 213 transmits the power to the second driven gear 223. The first driven gear 222 or the second driven gear 223 then transmits the power to the intermediate shaft 221. Finally, the intermediate shaft 221 transmits the power to the differential component 24, thereby realizing power transmission.

[0029] In a feasible embodiment, the first driven gear 222 and the second driven gear 223 are both connected to the intermediate shaft 221 through needle bearings. When power is transmitted to the first driven gear 222 or the second driven gear 223, the needle bearings can drive the intermediate shaft 221 to rotate, thereby realizing the transmission of power to the intermediate shaft 221.

[0030] Furthermore, the synchronizer component 23 includes a synchronizer, the synchronizer's gear hub is splined to the outer diameter of the intermediate shaft 221, and the synchronizer's gear sleeve is axially driven so that the first driven gear 222 is engaged with the first driving gear 212 or the second driven gear 223 is engaged with the second gear to achieve gear synchronization. After synchronization, power is transmitted to the intermediate shaft 221, and finally the intermediate shaft 221 transmits the power to the differential component 24.

[0031] In order to achieve the power transmission to the differential assembly 24, refer to Figure 1 As shown, the differential assembly 24 includes a differential (not shown) and a differential gear 241. A drive gear 224 is provided on the intermediate shaft 221. The differential gear 241 meshes with the drive gear 224. When power is transmitted to the intermediate shaft 221, the power is further transmitted to the differential through the meshing of the drive gear 224 and the differential gear 241. The differential gear 241 and the differential are bolted together to achieve power transmission.

[0032] In the embodiments provided in this application, refer to Figure 1 As shown, the power transmission unit 32 includes a worm 321, a worm wheel 322, and a worm wheel shaft 323. The worm 321 is connected to the output shaft of the gear shift motor 31, and the worm wheel 322 is mounted on the worm wheel shaft 323. The worm 321 and the worm wheel 322 mesh with each other. When the gear shift motor 31 is started to output power, the worm 321 rotates as the output shaft of the gear shift motor 31 rotates. Through the cooperation between the worm 321 and the worm wheel 322, the rotational motion of the worm 321 is converted into the left and right swinging motion of the worm wheel 322 about the axis of the worm wheel shaft 323.

[0033] Furthermore, the shift unit 33 includes a shift fork 331, a shift fork shaft 332, and a connecting member 333. The shift fork 331 is disposed on the shift fork shaft 332. The connecting member 333 connects the worm gear 322 to the shift fork 331. When the worm 321 rotates and drives the worm gear 322 to swing, power is transmitted to the shift fork 331, allowing the shift fork 331 to reciprocate along the shift fork shaft 332. The shift fork 331 is connected to the synchronizer. When the shift fork 331 moves along the axis of the shift fork shaft 332, it drives the synchronizer to move axially, thereby causing the first driven gear 222 to mesh with the first driving gear 212 or the second driven gear 223 to mesh with the second driving gear 213, thereby achieving power transmission.

[0034] In one feasible embodiment, the connecting member 333 includes a connecting seat 3331 and a connecting block 3333. The connecting seat 3331 is disposed on the shift fork 331. The connecting seat 3331 defines a mounting slot 3332. One end of the connecting block 3333 is connected to the worm gear 322, and the other end of the connecting block 3333 is disposed within the mounting slot 3332. When the worm gear 322 swings, the connecting block 3333 moves along the axis of the shift fork shaft 332. During this movement, the connecting block 3333 applies a force to the inner wall of the mounting slot 3332, causing the shift fork 331 to move along the axis of the shift fork shaft 332.

[0035] Preferably, the connecting block 3333 is fixed to the connecting seat 3331 by an elastic pin 3334. Based on the elastic characteristics of the elastic pin 3334, it can absorb vibration and impact. When the connecting block 3333 transmits power to the shift fork 331 to drive the shift fork 331 to move along the axial direction of the shift fork shaft 332, it can play a vibration reduction role, thereby protecting the structure of the shift part 33 to avoid damage to the shift part 33 due to vibration.

[0036] Based on the above embodiments, the working process of the transmission assembly of the present application is as follows: when shifting is required, the shift motor 31 is started to rotate the worm 321, and the power is transmitted to the worm gear 322 through the cooperation between the worm 321 and the worm gear 322. The power is then transmitted to the shift fork 331 by the connecting member 333, so that the shift fork 331 moves along the axial direction of the shift fork shaft 332, thereby driving the synchronizer to move axially, and the first driven gear 222 is meshed with the first driving gear 212, or the second driven gear 223 is meshed with the second driving gear 213, so as to achieve speed synchronization between the first driven gear 222 and the first driving gear 212, or the second driven gear 223 and the second driving gear 213. After the gears are synchronized, the power is transmitted to the intermediate shaft 221, and then the power is transmitted to the differential through the meshing action of the transmission gear 224 on the intermediate shaft 221 and the differential gear 241, thereby finally achieving gear shifting.

[0037] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. A transmission assembly, characterized in that: include: transmission housing; a transmission mechanism disposed in the transmission housing, the transmission mechanism comprising an input shaft component, an intermediate shaft component, a synchronizer component, and a differential component, the input shaft component being in driving connection with the intermediate shaft component, the synchronizer component being connected to the intermediate shaft component, and the intermediate shaft component being in driving connection with the differential component; The shift actuator is arranged in the transmission housing, and the shift actuator includes a shift motor, a power transmission part and a shift part. The power transmission part is connected to the output shaft of the shift motor, and the power transmission part is connected to the shift part in a transmission connection. The power transmission part is used to transmit the power output by the shift motor to the shift part to achieve shifting.

2. The transmission assembly according to claim 1, characterized in that: The input shaft component includes an input shaft, a first driving gear and a second driving gear, and the first driving gear and the second driving gear are both arranged on the input shaft.

3. The transmission assembly according to claim 2, characterized in that: The intermediate shaft component includes an intermediate shaft, a first driven gear and a second driven gear. The first driven gear and the second driven gear are both provided on the intermediate shaft. The first driven gear is engaged with the first driving gear, and the second driven gear is engaged with the second driving gear.

4. The transmission assembly according to claim 3, characterized in that: The first driven gear and the second driven gear are both connected to the intermediate shaft through needle bearings.

5. The transmission assembly according to claim 3, characterized in that: The synchronizer component is provided on the intermediate shaft and is located between the first driven gear and the second driven gear.

6. The transmission assembly according to claim 5, characterized in that: The gear hub of the synchronizer component is connected to the outer diameter of the intermediate shaft through a spline.

7. The transmission assembly according to claim 3, characterized in that: The differential component includes a differential and a differential gear. The intermediate shaft is provided with a transmission gear, and the differential gear is meshed with the transmission gear.

8. The transmission assembly according to claim 1, characterized in that: The power transmission part includes a worm, a worm wheel and a worm wheel shaft. The worm is connected to the output shaft of the gear shift motor. The worm wheel is provided on the worm wheel shaft. The worm is meshed with the worm wheel.

9. The transmission assembly according to claim 8, characterized in that: The shift part includes a shift fork, a shift fork shaft and a connecting member. The shift fork is arranged on the shift fork shaft. The connecting member is used to connect the worm gear and the shift fork. When the worm rotates, the worm gear can transmit power to the shift fork, so that the shift fork moves back and forth along the shift fork shaft.

10. The transmission assembly according to claim 9, characterized in that: The connecting member includes a connecting seat and a connecting block. The connecting seat is arranged on the shift fork. A mounting groove is provided on the connecting seat. One end of the connecting block is connected to the worm gear, and the other end of the connecting block is arranged in the mounting groove.

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