Wheel drive assembly and vehicle

Abstract

The application relates to the technical field of wheel drive, and discloses a wheel drive assembly and a vehicle. The wheel drive assembly comprises a motor unit, a first transmission and a second transmission which are integrated together, and the first transmission and the second transmission are arranged on the two sides of the motor unit in the vehicle width direction; the motor unit comprises a first drive motor and a second drive motor which are integrated together and arranged in the vehicle length direction and each of which has a motor center axis for extending along the vehicle width direction, a first output shaft of the first drive motor is in power transmission connection with a first input shaft of the first transmission, and a second output shaft of the second drive motor is in power transmission connection with a second input shaft of the second transmission; a first output axle half of the first transmission and a second output axle half of the second transmission are arranged along an axle half center axis A, and the axle half center axis A is located in the cross section of a rotor of the first drive motor. The wheel drive assembly is integrated together, has a compact structure, is small in volume and weight, and is low in cost.

Description

[0001] The present disclosure is a divisional application of the Chinese patent application No. 202011378556.6, filed on November 30, 2020, entitled "Wheel Drive Assembly and Vehicle", with the Chinese Patent Office. TECHNICAL FIELD

[0002] The present application relates to the technical field of wheel drive, in particular to a wheel drive assembly and a vehicle. BACKGROUND

[0003] With the development of vehicle technology, electric vehicles are becoming more and more popular. For example, the four-wheel independent drive system of an electric vehicle is driven by four motors independently driving four wheels of the vehicle, and the torques and speeds of the four wheels can be accurately controlled independently of each other, thereby bringing a series of advantages, such as realizing smaller radius turning, assisting ESP function, assisting steering function, assisting braking function, etc.

[0004] Generally, the wheel drive scheme is often used in the four-wheel independent drive system, and in the existing wheel drive scheme, the left and right two sets of drive assemblies are often independent, occupying a large space and having a high cost. SUMMARY

[0005] The purpose of the present application is to provide a wheel drive assembly which is integrated, compact in structure, high in space utilization, small in volume and weight, and low in cost.

[0006] In order to achieve the above purpose, the present application provides a wheel drive assembly, which comprises a motor unit, a first transmission and a second transmission integrated together, wherein the first transmission and the second transmission are respectively arranged on both sides of the motor unit in the vehicle width direction; the motor unit comprises the first drive motor and the second drive motor integrated together and arranged in the vehicle length direction, the motor center axis of each of the first drive motor and the second drive motor is used to extend along the vehicle width direction, the first output shaft of the first drive motor is in power transmission connection with the first input shaft of the first transmission, and the second output shaft of the second drive motor is in power transmission connection with the second input shaft of the second transmission; wherein the first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged along the half shaft center axis A, and the half shaft center axis A is located in the cross section of the rotor of the first drive motor.

[0007] In the technical solution, the motor unit, the first transmission and the second transmission are integrated together, the first transmission and the second transmission are arranged on the two sides of the motor unit in the vehicle width direction, meanwhile, the motor unit comprises the first driving motor and the second driving motor which are integrated together and arranged in the vehicle length direction and the respective motor center axes are used for extending along the vehicle width direction, so that the height of the motor unit in the vehicle height direction can be reduced, meanwhile, the first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged along the half shaft center axis A which is located in the cross section of the rotor of the first driving motor, so that the power transmission structure in the first transmission can be compact and the length of the first transmission in the vehicle length direction can be reduced, meanwhile, the first output half shaft and the second output half shaft are arranged close to the first driving motor to meet the arrangement requirements of the whole vehicle and avoid interference with the subframe or the vehicle body, so that the wheel edge drive assembly is integrated together, the structure is compact, the space utilization rate is high, the volume and weight are small and the cost is low.

[0008] Further, the half shaft center axis A coincides with the motor center axis B of the first driving motor.

[0009] Further, the first transmission comprises a first intermediate shaft which is arranged in parallel with the first input shaft and is spaced apart from the first input shaft in the vehicle length direction, and the first input gear arranged on the first input shaft and the first intermediate gear arranged on the first intermediate shaft are engaged.

[0010] Further, the distance between the first input shaft and the second driving motor is reduced so that the half shaft center axis A is located on the side of the motor center axis B of the first driving motor which is away from the second driving motor, and the second input gear which is smaller in diameter than the first input gear and replaces the first input gear is arranged on the first input shaft, and the second input gear and the first intermediate gear are engaged.

[0011] In addition, optionally, the distance between the first driving motor and the second driving motor remains unchanged, and the half shaft center axis A is located on the side of the motor center axis B of the first driving motor which is away from the second driving motor.

[0012] In addition, the first transmission is provided with a support, the two ends of the first input shaft are respectively supported on the support and the inner side wall of the first transmission, and the two ends of the first output half shaft are respectively supported on the support and the outer side wall of the first transmission.

[0013] In addition, the power transmission path from the first input shaft to the first output half shaft is a U-shaped transmission path; the U-shaped transmission path makes the length of the first transmission in the vehicle length direction less than the length of the second transmission in the vehicle length direction.

[0014] In addition, the first transmission includes a first intermediate shaft arranged in parallel with the first input shaft in the vehicle length direction and spaced from the first input shaft, and the first input shaft and the first output half shaft are located on the same side of the first intermediate shaft; the second transmission includes a second intermediate shaft arranged in parallel with the second input shaft in the vehicle length direction and spaced from the second input shaft, and the second input shaft and the second output half shaft are located on both sides of the second intermediate shaft; wherein the first included angle between the line connecting the axial center of the first input shaft and the axial center of the first intermediate shaft and the line connecting the axial center of the first output half shaft and the axial center of the first intermediate shaft is less than 90°; the second included angle between the line connecting the axial center of the second input shaft and the axial center of the second intermediate shaft and the line connecting the axial center of the second output half shaft and the axial center of the second intermediate shaft is greater than 90°.

[0015] In addition, the motor unit includes a motor housing, a first drive motor assembly and a second drive motor assembly, wherein the first drive motor assembly and the second drive motor assembly are arranged in the motor housing and spaced apart in the vehicle length direction, and the motor assembly center axis of each of the first drive motor assembly and the second drive motor assembly is used to extend along the vehicle width direction to form the first drive motor and the second drive motor sharing the same motor housing; a part of the one side wall of the motor housing serves as the inner side wall of the first transmission, and at least a part of the other side wall of the motor housing serves as the inner side wall of the second transmission.

[0016] In addition, the motor housing of the motor unit is provided with a motor cooling water channel, and the motor cooling water channel includes a cooling water inlet and a cooling water outlet, wherein the motor cooling water channel extends from the cooling water inlet to the cooling water outlet alternately around the first drive motor and the second drive motor.

[0017] Further, the wheel drive assembly includes a flat-shaped electronic control unit, wherein in the vehicle height direction, the flat-shaped electronic control unit is fixedly connected to the top of the motor unit, the first transmission and the second transmission.

[0018] Further, the motor housing of the motor unit is provided with a motor cooling water channel, and the electronic control housing of the flat-shaped electronic control unit is provided with an electronic control cooling water channel, wherein the motor cooling water channel and the electronic control cooling water channel are in sealed communication.

[0019] Furthermore, one of the motor unit and the flat electronic control unit includes a copper busbar, and the other of the flat electronic control unit and the motor unit includes a copper busbar connection end, and the copper busbar connection end is connected to the copper busbar, wherein the electronic control housing of the flat electronic control unit includes an openable maintenance cover located at the connection between the copper busbar connection end and the copper busbar.

[0020] Furthermore, the wheel-side drive assembly includes a rotating transformer and a temperature sensor, wherein the rotating transformer and the temperature sensor extend into the motor housing of the motor unit, and the connection lines between the rotating transformer and the temperature sensor and the flat electronic control unit are blocked by the electronic control housing of the flat electronic control unit and the motor housing and do not leak out.

[0021] Finally, the present invention provides a vehicle, which is provided with any of the above-mentioned wheel-side drive assemblies, wherein one of the first output half shaft and the second output half shaft serves as a left output half shaft and the other serves as a right output half shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a wheel-side drive assembly provided in a specific embodiment of the present invention;

[0023] Figure 2 is another schematic diagram of a wheel drive assembly provided in a specific embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a three-dimensional structure of a wheel-side drive assembly provided in a specific embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A schematic diagram of the disassembled structure of the flat electronic control unit and motor unit of the wheel side drive assembly;

[0026] Figure 5 yes Figure 3 Exploded state diagram of the wheel drive assembly;

[0027] Figure 6 This is a schematic diagram of a motor cooling water channel of a motor unit in a wheel-side drive assembly provided in a specific embodiment of the present invention;

[0028] Figure 7 This is another schematic diagram of the motor cooling water channel of the motor unit in the wheel-side drive assembly provided by a specific embodiment of the present invention;

[0029] Figure 8 This is another schematic diagram of the three-dimensional structure of the wheel-side drive assembly provided in a specific embodiment of the present invention;

[0030] Figure 9 is Figure 8 an exploded view of the wheel drive assembly of

[0031] Figure 10 is Figure 9 a disassembled structure diagram of the flat electric control unit and the motor unit of the wheel drive assembly of

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 1 - first transmission, 2 - second transmission, 3 - motor unit, 4 - first drive motor, 5 - second drive motor, 6 - first output shaft, 7 - first input shaft, 8 - second input shaft, 9 - first output half shaft, 10 - second output half shaft, 11 - first intermediate shaft, 12 - first input gear, 13 - first intermediate gear, 14 - second input gear, 15 - support piece, 16 - second intermediate shaft, 17 - motor housing, 18 - first drive motor assembly, 19 - second drive motor assembly, 20 - flat electric control unit, 21 - motor cooling water channel, 22 - cooling water inlet, 23 - cooling water outlet, 24 - copper bar, 25 - maintenance cover. DETAILED DESCRIPTION

[0034] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0035] Referring to the two schematic structures shown in Figure 1 and Figure 2 , the wheel drive assembly provided by the present application includes a motor unit 3, a first transmission 1 and a second transmission 2 integrated together, wherein the first transmission 1 and the second transmission 2 are respectively arranged on both sides of the motor unit 3 in the vehicle width direction; the motor unit 3 includes a first drive motor 4 and a second drive motor 5 integrated together and arranged in the vehicle length direction and transversely along the vehicle width direction, that is, the motor center axis of each of the first drive motor 4 and the second drive motor 5 is used to extend along the vehicle width direction, the first output shaft 6 of the first drive motor 4 is in power transmission connection with the first input shaft 7 of the first transmission 1, and the second output shaft of the second drive motor 5 is in power transmission connection with the second input shaft 8 of the second transmission 2; wherein the first output half shaft 9 of the first transmission 1 and the second output half shaft 10 of the second transmission 2 are arranged along the half shaft center axis A, and the half shaft center axis A is located in the cross section of the rotor of the first drive motor 4.

[0036] Since the motor unit, the first transmission and the second transmission are integrated together, the first transmission and the second transmission are arranged respectively at two sides of the motor unit in the vehicle width direction, and meanwhile, the motor unit comprises the first driving motor and the second driving motor which are integrated together and arranged in the vehicle length direction and transversely along the vehicle width direction, so that the height of the motor unit in the vehicle height direction can be reduced, and meanwhile, the first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged along the half shaft center axis A which is located in the cross section of the rotor of the first driving motor, so that the power transmission structure in the first transmission can be compact, the length of the first transmission in the vehicle length direction can be reduced, and meanwhile, the first output half shaft and the second output half shaft are arranged close to the first driving motor to meet the arrangement requirements of the whole vehicle and avoid interference with the sub-frame or the vehicle body, so that the wheel drive assembly is integrated together, the structure is compact, the space utilization rate is high, the volume and weight are small, and the cost is low.

[0037] In addition, in the wheel drive assembly, the half shaft center axis A can be located at any position in the cross section of the rotor of the first driving motor 4, for example, in an embodiment, the half shaft center axis A can be located at the edge of the cross section of the rotor of the first driving motor 4. Alternatively, in another embodiment, referring to Figure 1 , the half shaft center axis A coincides with the motor center axis B of the first driving motor 4, and at this time, the first input shaft 7 and the first driving motor 4 are located at the first position. In this way, the power transmission structure in the first transmission can be further compact, and the length of the first transmission in the vehicle length direction can be further reduced.

[0038] In addition, the first transmission 1 can have a power transmission mechanism, such as a plurality of gear sets or worm gear sets, etc. For example, in an embodiment, referring to Figure 1 , the first transmission 1 comprises a first intermediate shaft 11 which is arranged in parallel with the first input shaft 7 and is spaced apart from the first input shaft 7 in the vehicle length direction, and the first input gear 12 arranged on the first input shaft 7 and the first intermediate gear 13 arranged on the first intermediate shaft 11 are engaged, so that the rotation output by the first driving motor 4 drives the first intermediate shaft 11 to rotate through the engaged first input gear 12 and first intermediate gear 13, and the first intermediate shaft 11 transmits the rotation to the subsequent power transmission mechanism.

[0039] Further, referring to Figure 2, in other embodiments, the distance between the first input shaft 7 and the first driving motor 4 and the second driving motor 5 is reduced, that is, the first input shaft 7 and the first driving motor 4 are arranged at a second position closer to the second driving motor 5 than the first position, that is, the distance between the first driving motor 4 and the second driving motor 5 is shortened, so that the half shaft center axis A is located on the side of the motor center axis B of the first driving motor 4 away from the second driving motor 5; at the same time, in the second position, the first input shaft 7 is provided with a second input gear 14 smaller in diameter than the first input gear 12 and replacing the first input gear, and the second input gear 14 and the first intermediate gear 13 are engaged. In this way, the diameter of the second input gear 14 can be further reduced, so that the structural size of the first transmission 1 is more compact.

[0040] In addition, in alternative embodiments, referring to Figure 2 , the distance between the first driving motor 4 and the second driving motor 5 remains unchanged, and the half shaft center axis A is located on the side of the motor center axis B of the first driving motor 4 away from the second driving motor 5. In this way, according to the actual arrangement requirements of the wheel drive assembly on the vehicle model, the positions of the first output half shaft 9 of the first transmission 1 and the second output half shaft 10 of the second transmission 2 in the length direction of the vehicle can be adjusted accordingly, so as to meet the arrangement of different vehicle models and meet the overall arrangement requirements to avoid interference with the subframe or the vehicle body.

[0041] In addition, referring to Figure 1 and Figure 2 , the first transmission 1 is provided with a support 15, the two ends of the first input shaft 7 are respectively supported on the support 15 and the inner side wall of the first transmission 1, and the two ends of the first output half shaft 9 are respectively supported on the support 15 and the outer side wall of the first transmission. In this way, due to the more compact structure of the first transmission 1, the first output half shaft 9 and the first input shaft 7 can be isolated and supported by the support 15, so as to shorten the length of the first output half shaft 9 and the first input shaft 7 in the width direction of the vehicle and reduce the width of the first transmission in the width direction of the vehicle, so as to make the first transmission more compact.

[0042] In addition, referring to Figure 1 and 2 , in the first transmission, the power transmission path from the first input shaft 7 to the first output half shaft 9 is a U-shaped transmission path; the U-shaped transmission path makes the length of the first transmission in the length direction of the vehicle smaller than the length of the second transmission in the length direction of the vehicle. In this way, the length of the first transmission in the length direction of the vehicle can be effectively reduced, so that the first transmission is more compact, and at the same time, the U-shaped transmission path can simplify and compact the power transmission mechanism in the first transmission.

[0043] In addition, referring to Figure 1and Figure 2 , the first transmission 1 comprises a first intermediate shaft 11 arranged in parallel with and spaced apart from the first input shaft 7 in the vehicle length direction, the first input shaft 7 and the first output half shaft 9 are located on the same side of the first intermediate shaft 11, so that, for example, the power transmission path from the first input shaft 7 to the first output half shaft 9 can be a U-shaped transmission path, while the second transmission 2 comprises a second intermediate shaft 16 arranged in parallel with and spaced apart from the second input shaft 8 in the vehicle length direction, the second input shaft 8 and the second output half shaft 10 are located on both sides of the second intermediate shaft 16; wherein the first included angle between the line connecting the axial center of the first input shaft 7 and the axial center of the first intermediate shaft 11 and the line connecting the axial center of the first output half shaft 9 and the axial center of the first intermediate shaft 11 is less than 90°, so that the width of the first transmission in the vehicle width direction can be further reduced; the second included angle between the line connecting the axial center of the second input shaft 8 and the axial center of the second intermediate shaft 16 and the line connecting the axial center of the second output half shaft 10 and the axial center of the second intermediate shaft 16 is greater than 90°, further 180°, so that the width of the second transmission in the vehicle width direction can be further reduced.

[0044] In addition, the housings of the first drive motor 4 and the second drive motor 5 can be integrated, for example, welded together, or, as shown in Figures 1-5 , the first drive motor 4 and the second drive motor 5 share the same motor housing, that is, the motor unit 3 comprises a motor housing 17, a first drive motor assembly 18 and a second drive motor assembly 19, wherein the first drive motor assembly 18 and the second drive motor assembly 19 are arranged in the motor housing 17 and are arranged in parallel in the vehicle length direction and transversely along the vehicle width direction, that is, the motor assembly center axis of the first drive motor assembly 18 and the second drive motor assembly 19 is used to extend along the vehicle width direction to form the first drive motor 4 and the second drive motor 5 sharing the same motor housing 17, so that the first drive motor 4 and the second drive motor 5 are integrated together, a part of the one side wall of the motor housing 17 as the inner side wall of the first transmission 1, and at least a part of the other side wall of the motor housing 17 as the inner side wall of the second transmission 2. In this way, the side walls between the motor housing 17 and the transmissions can be shared, thereby further improving the integration of the wheel drive assembly.

[0045] In addition, referring to Figure 6 and Figure 7As shown, the motor housing of the motor unit 3 is provided with a motor cooling water channel 21, which includes a cooling water inlet 22 and a cooling water outlet 23, wherein the motor cooling water channel 21 extends from the cooling water inlet to the cooling water outlet alternately around the first driving motor 4 and the second driving motor 5. In this way, the cooling water entering the motor cooling water channel 21 from the cooling water inlet 22 will flow through the first driving motor 4 and the second driving motor 5 alternately, so as to ensure that the first driving motor 4 and the second driving motor 5 can be cooled to the same extent, and the balance of heat dissipation is improved.

[0046] In addition, the same motor housing shared by the first driving motor 4 and the second driving motor 5 is more conducive to forming such a motor cooling water channel 21.

[0047] Of course, alternatively, the cooling water channels on the housings of the first driving motor 4 and the second driving motor 5 can be connected alternately, so that the formed motor cooling water channel 21 extends from the cooling water inlet to the cooling water outlet alternately around the first driving motor 4 and the second driving motor 5.

[0048] The "motor cooling water channel 21 extends from the cooling water inlet to the cooling water outlet alternately around the first driving motor 4 and the second driving motor 5" can have various ways, for example, in the way of Figure 6 , the motor cooling water channel 21 is wound around the first driving motor 4 (for example, the first driving motor assembly 18) for one turn, then wound around the second driving motor 5 (for example, the second driving motor assembly 19) in the middle of the two driving motors, and then wound around the first driving motor 4 again, and so on. In the way of Figure 7 , the motor cooling water channel 21 is wound around the first driving motor 4 to the upper part of the middle of the two driving motors, then axially bent and returned to be wound around the second driving motor 5 to the lower part of the middle of the two driving motors, then axially bent and returned to be wound around the first driving motor 4 to the upper part of the middle of the two driving motors, then axially bent and returned to be wound around the second driving motor 5 to the lower part of the middle of the two driving motors, and so on.

[0049] Further, the cooling water inlet 22 and the cooling water outlet 23 of the motor cooling water channel 21 are formed at the middle position between the first driving motor 4 and the second driving motor 5.

[0050] In addition, with reference to Figure 3 , Figure 4 and Figure 5The wheel drive assembly includes a flat ECU 20, wherein the flat ECU 20 is fixedly connected on top of the motor unit 3, the first transmission 1 and the second transmission 2 in the vehicle height direction. In this way, the height of the wheel drive assembly in the vehicle height direction can be reduced due to the adoption of the flat ECU 20, and the ECU unit, the motor unit and the transmissions of the wheel drive assembly can be more integrated.

[0051] In addition, the motor housing of the motor unit 3 is provided with a motor cooling water channel, and the ECU housing of the flat ECU 20 is provided with an ECU cooling water channel, wherein the motor cooling water channel and the ECU cooling water channel are in sealed communication. For example, the ECU cooling water channel can be provided with a total water inlet, so that the cooling water entering the ECU cooling water channel from the total water inlet cools the flat ECU 20. Due to the flat shape of the flat ECU 20, the heat dissipation area can be increased, and the heat dissipation amount of the flat ECU 20 is small, so that the temperature of the cooling water basically does not rise, and the cooling water can continue to flow into the motor cooling water channel to alternately cool the two driving motors. The cooling water can be directly discharged from the cooling water outlet 23 of the motor unit 3.

[0052] Alternatively, the flat ECU 20 can be provided with a total water outlet, so that the cooling water discharged from the cooling water outlet 23 can be discharged from the total water outlet of the flat ECU 20, so that the flat ECU 20 can be conveniently assembled on the motor unit 3 without avoiding the cooling water outlet 23.

[0053] In addition, in one embodiment, referring to one embodiment shown in Figure 4 and Figure 5 and another embodiment shown in Figures 8-10 One of the motor unit 3 and the flat ECU 20 includes a copper bar 24, and the other of the motor unit 3 and the flat ECU 20 includes a copper bar connecting end, wherein the copper bar connecting end and the copper bar 24 are connected, and the ECU housing of the flat ECU 20 includes an openable maintenance cover 25 located at the connection position of the copper bar connecting end and the copper bar 24. In this way, the three-phase electrical connection between the motor unit 3 and the flat ECU 20 can be conveniently realized through the connection of the copper bar connecting end and the copper bar 24, so that the wheel drive assembly is more integrated. Further, after the motor unit 3 and the flat ECU 20 are connected, the housing of the motor unit 3 and the housing of the flat ECU 20 will shield the copper bar connecting end and the copper bar 24 without leaking, so that it is beneficial to meet the protection requirements.

[0054] In addition, in an embodiment, the wheel drive assembly comprises a resolver and a temperature sensor, wherein the resolver and the temperature sensor are extended into the motor housing of the motor unit 3, and the connection lines of the resolver and the temperature sensor with the flat electric control unit 20 are shielded by the electric control housing and the motor housing of the flat electric control unit 20 and are not exposed, that is, after the flat electric control unit 20 and the motor unit 20 are connected, the connection lines of the resolver and the temperature sensor with the flat electric control unit 20 are shielded, so that the protection requirements can be met.

[0055] Finally, the application provides a vehicle provided with the wheel drive assembly described above, wherein one of the first output half shaft 9 and the second output half shaft 10 is a left output half shaft and the other is a right output half shaft. The left output half shaft and the right output half shaft are respectively connected in power transmission with the left wheel and the right wheel of the vehicle. In this way, the overall quality of the vehicle is effectively improved.

[0056] The preferred embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the specific details in the above-described embodiments. Within the technical concept of the application, various simple modifications can be made to the technical solutions of the application, and these simple modifications all belong to the protection scope of the application.

[0057] In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again by the application.

[0058] In addition, various different embodiments of the application can also be combined in any appropriate manner, as long as they do not deviate from the idea of the application, and they should also be considered as disclosed by the application.

Claims

1. A wheel drive assembly, characterized in that: It includes a motor unit, a first transmission and a second transmission integrated together, wherein: The first transmission and the second transmission are respectively provided on both sides of the motor unit in the vehicle width direction; The motor unit includes a first drive motor and a second drive motor that are integrated together and arranged in the vehicle length direction, wherein the motor center axis of each of the first drive motor and the second drive motor is configured to extend in the vehicle width direction, a first output shaft of the first drive motor is connected to the first input shaft of the first transmission for power transmission, and a second output shaft of the second drive motor is connected to the second input shaft of the second transmission for power transmission; in, The first output half shaft of the first transmission and the second output half shaft of the second transmission are arranged with a half shaft center axis A, the half shaft center axis A is located within the cross section of the rotor of the first drive motor, and the half shaft center axis A is located on the side of the motor center axis B of the first drive motor facing away from the second drive motor; The first transmission includes a first intermediate shaft spaced apart from and arranged parallel to the first input shaft in the vehicle length direction, a second input gear is provided on the first input shaft, a first intermediate gear is provided on the first intermediate shaft, and the second input gear is meshed with the first intermediate gear.

2. The wheel drive assembly according to claim 1, characterized in that: A support member is provided in the first transmission, and both ends of the first input shaft are supported on the support member and the inner side wall of the first transmission respectively, and both ends of the first output half shaft are supported on the support member and the outer side wall of the first transmission respectively.

3. The wheel drive assembly according to claim 1, characterized in that: In the first transmission, the power transmission path from the first input shaft to the first output half shaft is a U-shaped transmission path; The U-shaped transmission path causes the length of the first transmission in the vehicle length direction to be shorter than the length of the second transmission in the vehicle length direction.

4. The wheel drive assembly according to claim 1, characterized in that: The first input shaft and the first output half shaft are located on the same side of the first intermediate shaft; The second transmission includes a second intermediate shaft spaced apart from the second input shaft in the vehicle length direction, the second input shaft and the second output half shaft being located on both sides of the second intermediate shaft; wherein a first angle between a line connecting the axial center of the first input shaft and the axial center of the first intermediate shaft and a line connecting the axial center of the first output half shaft and the axial center of the first intermediate shaft is less than 90°; A second angle between a line connecting the axial centers of the second input shaft and the second intermediate shaft and a line connecting the axial centers of the second output half shaft and the second intermediate shaft is greater than 90°.

5. The wheel drive assembly according to claim 1, characterized in that: The motor unit includes a motor housing, a first drive motor assembly and a second drive motor assembly, wherein: The first drive motor assembly and the second drive motor assembly are disposed in the motor housing and spaced apart in the vehicle length direction, and the motor assembly central axes of the first drive motor assembly and the second drive motor assembly are configured to extend along the vehicle width direction, so as to form the first drive motor and the second drive motor sharing the same motor housing; A portion of the side wall on one side of the motor housing serves as an inner wall of the first transmission, and at least a portion of the other side wall of the motor housing serves as an inner wall of the second transmission.

6. The wheel drive assembly according to claim 1, characterized in that: A motor cooling water channel is provided in the motor housing of the motor unit, and the motor cooling water channel includes a cooling water inlet and a cooling water outlet, wherein the motor cooling water channel starts from the cooling water inlet and alternately winds around the first drive motor and the second drive motor to extend to the cooling water outlet.

7. The wheel drive assembly according to any one of claims 1 to 6, characterized in that: The wheel-side drive assembly includes a flat electronic control unit, wherein in the vehicle height direction, the flat electronic control unit is fixedly connected to the top of the motor unit, the first transmission and the second transmission.

8. The wheel drive assembly according to claim 7, characterized in that: A motor cooling water channel is provided in the motor housing of the motor unit, and an electric control cooling water channel is provided in the electric control housing of the flat electric control unit, wherein the motor cooling water channel and the electric control cooling water channel are sealed and communicated with each other.

9. The wheel drive assembly according to claim 7, characterized in that: One of the motor unit and the flat electronic control unit includes a copper busbar, and the other of the motor unit and the flat electronic control unit includes a copper busbar connection end, wherein the copper busbar connection end is connected to the copper busbar, wherein the electronic control housing of the flat electronic control unit includes an openable maintenance cover located at the connection between the copper busbar connection end and the copper busbar.

10. The wheel drive assembly according to claim 7, characterized in that: The wheel-side drive assembly includes a rotary transformer and a temperature sensor, wherein the rotary transformer and the temperature sensor extend into the motor housing of the motor unit, and the connection lines between the rotary transformer and the temperature sensor and the flat electronic control unit are blocked by the electronic control housing of the flat electronic control unit and the motor housing and do not leak out.

11. A vehicle, characterized in that: The vehicle is provided with the wheel-side drive assembly according to any one of claims 1 to 10, wherein one of the first output half shaft and the second output half shaft serves as a left output half shaft and the other serves as a right output half shaft.

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