Vehicle drive system with conjugated stator motor and vehicle

Abstract

The utility model provides a vehicle driving system with a conjugate stator motor and a vehicle. A vehicle drive system may include a conjugate stator motor (10), a first gear train (30), a second gear train (40), a differential (50), and an engine (20). The conjugate stator motor comprises an inner motor (11) and an outer motor (12), and an inner motor stator (111) and an outer motor stator (121) share a stator core. The engine is in transmission connection with an inner motor shaft (113) through a first gear transmission mechanism and used for driving the inner motor to generate electricity. The outer motor rotor (122) is connected to the differential mechanism through the outer motor shaft (124) and the second gear transmission mechanism and used for driving the vehicle to run. An outer motor shaft is supported by a first bearing (B1) at one axial end of the conjugate stator motor; and at the other axial end of the conjugate stator motor, a second bearing (B2) is arranged between the inner motor rotor (112) and the outer motor shaft.

Description

Technical Field

[0001] This application relates to the field of vehicle drive system technology, and particularly to a vehicle drive system and vehicle with a conjugate stator motor. Background Technology

[0002] Electric motors have been widely used in new energy vehicles. As an example, CN114761265A discloses a drive unit and drive assembly. In this design, an internal combustion engine and a drive unit (hybrid transmission) are connected via a parallel gear set, and a clutch is located on the axial side of the internal motor. CN114761265A uses two motors arranged coaxially.

[0003] In some dual-motor schemes using coaxial arrangement that the inventor is aware of, the outer motor rotor is supported by a cantilever, resulting in weak bearing support stiffness for the outer motor rotor, which is detrimental to NVH performance and durability. Utility Model Content

[0004] In view of the shortcomings of the prior art, one object of this application is to provide a vehicle drive system with a conjugate stator motor, which can improve the support stiffness of the external motor rotor, thereby facilitating improved NVH performance and durability.

[0005] To achieve the above objectives, the present application may adopt the following technical solutions.

[0006] One embodiment of this application provides a vehicle drive system with a conjugate stator motor, comprising:

[0007] A conjugate stator motor includes an inner motor and an outer motor. The inner motor includes an inner motor stator, an inner motor rotor located radially inside the inner motor stator, and an inner motor shaft driven to the inner motor rotor. The outer motor includes an outer motor stator, an outer motor rotor located radially outside the outer motor stator, and an outer motor shaft driven to the outer motor rotor. The inner motor stator and the outer motor stator share a stator core.

[0008] The first gear transmission mechanism, the second gear transmission mechanism, and the differential; and

[0009] An engine, which is connected to the internal motor shaft via the first gear transmission mechanism, is used to drive the internal motor to generate electricity.

[0010] The external motor rotor is connected to the differential via the external motor shaft and the second gear transmission mechanism, and is used to drive the vehicle.

[0011] At one axial end of the conjugate stator motor, the outer motor shaft is supported by a first bearing; at the other axial end of the conjugate stator motor, a second bearing is provided between the inner motor rotor and the outer motor shaft.

[0012] In at least one embodiment, a third bearing is provided at one axial end of the conjugate stator motor between the inner motor shaft and the outer motor shaft.

[0013] In at least one embodiment, the inner motor further includes an inner rotor support, which drivesly connects the inner motor rotor and the inner motor shaft, and the second bearing is disposed between the inner rotor support and the outer motor shaft.

[0014] In at least one embodiment, the external motor further includes an external rotor bracket, the external rotor bracket being a transmission connection between the external motor rotor and the external motor shaft, and the first bearing comprising: a bearing disposed between the external rotor bracket and the housing of the conjugate stator motor or the vehicle drive system; and a bearing disposed between the external motor shaft and the housing of the conjugate stator motor or the vehicle drive system.

[0015] In at least one embodiment, the second bearing comprises two needle roller bearings arranged axially side by side.

[0016] In at least one embodiment, the inner rotor support includes an inner rotor support cylindrical portion and an inner rotor support end portion located at the other axial end of the inner rotor support cylindrical portion. The inner rotor support end portion is located at the other axial end of the conjugate stator motor, and the outer motor shaft is located on one axial side of the inner rotor support end portion. The inner motor shaft is drively connected to the inner rotor support end portion.

[0017] The second bearing is disposed between the inner rotor support cylindrical portion and the other axial end of the outer motor shaft.

[0018] The outer rotor support includes an outer rotor support cylindrical portion and an outer rotor support end located at one axial end of the outer rotor support cylindrical portion. The outer rotor support end is located at one axial end of the conjugate stator motor, and the middle position of the outer motor shaft is connected to the outer rotor support end.

[0019] In at least one embodiment, the first gear transmission mechanism includes a first gear coaxially connected to the inner motor shaft, and the second gear transmission mechanism includes a third gear coaxially connected to the outer motor shaft.

[0020] The vehicle drive system also includes a clutch disposed between the inner motor shaft and the outer motor shaft, for realizing a controllable transmission connection between the inner motor shaft and the outer motor shaft.

[0021] The clutch is located between the first gear and the third gear in the axial direction of the conjugate stator motor.

[0022] In at least one embodiment, the inner motor rotor and the outer motor rotor are completely decoupled, and the inner motor shaft and the outer motor shaft are completely decoupled.

[0023] In at least one embodiment, at the other axial end of the conjugate stator motor, the inner motor shaft is supported by a fourth bearing on the housing of the conjugate stator motor or the vehicle drive system.

[0024] In at least one embodiment, the first gear transmission mechanism includes a first gear pair, which is composed of a first gear in the form of an external gear and a second gear in the form of an internal gear ring. The first gear is driven to the internal motor shaft, and the second gear is driven to the engine. The number of teeth of the second gear is greater than the number of teeth of the first gear.

[0025] The second gear transmission mechanism includes a second gear pair, a third gear pair, and an intermediate shaft. The second gear pair includes a third gear and a fourth gear that mesh with each other. The third gear is driven to the external motor shaft, and the fourth gear is driven to the intermediate shaft.

[0026] The third gear pair includes a fifth gear and a sixth gear that mesh with each other. The fifth gear is driven to the intermediate shaft, and the sixth gear constitutes the input gear of the differential.

[0027] One embodiment of this application also provides a vehicle including the vehicle drive system with a conjugate stator motor of this application.

[0028] In this application, the external motor shaft is supported at both ends, and the external motor rotor connected to the external motor shaft has high support rigidity. Attached Figure Description

[0029] Figure 1 A schematic diagram of a vehicle drive system with a conjugate stator motor according to a first embodiment of this application is shown.

[0030] Figure 2 A schematic diagram of a vehicle drive system with a conjugate stator motor according to a second embodiment of this application is shown.

[0031] Figure 3 It shows Figure 1 and Figure 2 A schematic diagram of the stator core of a conjugate stator motor.

[0032] Explanation of reference numerals in the attached figures

[0033] 10 Conjugate stator motor; 110 Stator core; 117 Outer stator conductor slot; 118 Inner stator conductor slot; 119 Core body.

[0034] 11 Inner motor 111 Inner motor stator 112 Inner motor rotor 113 Inner motor shaft 114 Inner rotor support 115 Inner motor winding

[0035] 12 External motor 121 External motor stator 122 External motor rotor 123 External rotor support 124 External motor shaft 125 External motor winding

[0036] 20 engine

[0037] 30 First gear transmission mechanism; 31 First gear; 32 Second gear

[0038] 40 Second gear transmission mechanism; 41 Third gear; 42 Fourth gear; 43 Fifth gear

[0039] 44 Sixth Gear 45 Intermediate Shaft

[0040] 50 differential, 51 and 52 half shafts

[0041] 60 shock absorber

[0042] CL clutch

[0043] B1 First bearing; B2 Second bearing; B3 Third bearing; B4 Fourth bearing

[0044] Axial direction R radial direction C circumferential direction Detailed Implementation

[0045] Exemplary embodiments of this application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are for teaching those skilled in the art how to implement this application only, and are not intended to exhaustively describe all possible methods of this application, nor to limit the scope of this application.

[0046] In this application, unless otherwise specified, "axial", "radial", and "circumferential" represent the axial, radial, and circumferential directions of the conjugate stator motor of this application, respectively. Further, "radial outer" refers to the side that is radially away from the central axis of the conjugate stator motor, and "radial inner" refers to the side that is radially close to the central axis of the conjugate stator motor.

[0047] In this application, a transmission connection refers to a connection capable of transmitting torque, such as a transmission connection achieved through gears, splines, welding, integral forming, etc.

[0048] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] like Figure 1 and Figure 2As shown, embodiments of this application provide a vehicle drive system with a conjugate stator motor, which may include a conjugate stator motor 10, a first gear transmission mechanism 30, a second gear transmission mechanism 40, a differential 50, and an engine 20.

[0050] The conjugate stator motor 10 may include an inner motor 11 and an outer motor 12. The inner motor 11 includes an inner motor stator 111, an inner motor rotor 112 located radially inside the inner motor stator 111, and an inner motor shaft 113 driven to the inner motor rotor 112. The outer motor 12 includes an outer motor stator 121, an outer motor rotor 122 located radially outside the outer motor stator 121, and an outer motor shaft 124 driven to the outer motor rotor 122.

[0051] Here, the inner motor 11 is an inner rotor motor. The outer motor 12 is an outer rotor motor.

[0052] Here, the internal motor stator 111 and the external motor stator 121 can share the stator core 110, which can achieve higher power density and a more compact structure.

[0053] Here, the inner motor 11 and the outer motor 12 can have the same axial length and occupy the same axial position, thereby reducing the axial dimension of the vehicle drive system and achieving a more compact structure.

[0054] Engine 20 is connected to the inner motor shaft 113 via a first gear transmission mechanism 30 to drive the inner motor 11 to generate electricity. The outer motor rotor 122 is connected to the differential 50 via the outer motor shaft 124 and a second gear transmission mechanism 40 to drive the vehicle. Of course, the inner motor 11 can also be used to start engine 20; the outer motor 12 can also be used to generate electricity, for example, in regenerative braking mode.

[0055] At one axial end of the conjugate stator motor 10 ( Figure 1 , Figure 2 The outer motor shaft 124 is supported by the first bearing B1 at the right end of the conjugate stator motor 10; at the other end of the axial direction of the conjugate stator motor 10 ( Figure 1 , Figure 2 (At the left end of the middle), a second bearing B2 is provided between the inner motor rotor 112 and the outer motor shaft 124.

[0056] In the above embodiment, on one axial side, the outer motor shaft 124 is supported by the first bearing B1, so that the outer motor rotor 122 is supported on one axial side. On the other axial side, the outer motor shaft 124 is supported to the inner motor rotor 112 via the second bearing B2. In this way, the outer motor shaft 124 is supported at both ends, and the support stiffness of the outer motor rotor 122 connected to the outer motor shaft 124 is high.

[0057] This application transforms the existing cantilever support into a simply supported beam support, so that the second bearing B2 supporting the inner motor rotor 112 is also added to the support of the outer motor rotor 122, thereby improving the support stiffness of the outer motor rotor 122 and achieving improved NVH performance and durability.

[0058] Here, the external motor stator 121 and the internal motor stator 111 can be fixed to the housing of the conjugate stator motor 10 or the vehicle drive system.

[0059] Optionally, a third bearing B3 is provided at one axial end of the conjugate stator motor 10, between the inner motor shaft 113 and the outer motor shaft 124. Here, the outer motor shaft 124 can be a hollow shaft, and the inner motor shaft 113 is inserted into the outer motor shaft 124. The third bearing B3 can be a needle roller bearing.

[0060] Optionally, the inner motor 11 may also include an inner rotor support 114, which drivesly connects the inner motor rotor 112 and the inner motor shaft 113. The second bearing B2 may be disposed between the inner rotor support 114 and the outer motor shaft 124.

[0061] Optionally, the external motor 12 may further include an external rotor support 123, which drivesly connects the external motor rotor 122 and the external motor shaft 124. The first bearing B1 may include: a bearing disposed between the external rotor support 123 and the housing of the conjugate stator motor 10 or the vehicle drive system; and a bearing disposed between the external motor shaft 124 and the housing of the conjugate stator motor 10 or the vehicle drive system. In one example, the first bearing B1 may be two coaxial bearings arranged side-by-side.

[0062] Of course, the first bearing B1 can also be a single bearing.

[0063] Here, the rotor support 123 can be connected to the outer motor shaft 124 by an interference fit through a spline structure, which ensures both the transmission connection between the two and their axial positioning.

[0064] Optionally, the second bearing B2 may include two needle roller bearings. The two needle roller bearings are arranged side by side in the axial direction A.

[0065] Optionally, the inner rotor support 114 may include an inner rotor support cylindrical portion and an inner rotor support end located at the other axial end of the inner rotor support cylindrical portion. The inner rotor support end may be located at the other axial end of the conjugate stator motor 10. The inner rotor support cylindrical portion may be fixedly connected to the inner motor rotor 112. The outer motor shaft 124 is located on one axial side of the inner rotor support end. The inner motor shaft 113 may be driveably connected to the inner rotor support end.

[0066] The second bearing B2 can be located between the inner rotor support cylindrical part and the other axial end of the outer motor shaft 124.

[0067] The outer rotor support 123 may include an outer rotor support cylindrical portion and an outer rotor support end located at one axial end of the outer rotor support cylindrical portion. The outer rotor support end may be located at one axial end of the conjugate stator motor 10 and may extend approximately along the radial direction R of the conjugate stator motor 10. The outer rotor support cylindrical portion may be fixedly connected to the outer motor rotor 122. The intermediate position of the outer motor shaft 124 (which should be understood as a region rather than limited to a midpoint) is connected to the outer rotor support end. Here, the portion of the outer motor shaft 124 located between the third gear 41 (described later) and the portion of the outer motor shaft 124 supported by the second bearing B2 can be considered as the intermediate position of the outer motor shaft 124.

[0068] It is understandable that the external motor shaft 124 can be considered to be located on one side of the axial direction of the external rotor support 123. Figure 1 or Figure 2 The portion on the right side (in the diagram) is part of the outer motor shaft 124 or part of the outer rotor support 123. In other words, it can be considered that the third gear 41 described later is driven to the outer motor shaft 124 or the outer rotor support 123.

[0069] Optionally, the first gear transmission mechanism 30 may include a first gear 31 coaxially connected to the inner motor shaft 113, and the second gear transmission mechanism 40 may include a third gear 41 coaxially connected to the outer motor shaft 124.

[0070] The vehicle drive system may also include a clutch CL, which is located between the inner motor shaft 113 and the outer motor shaft 124 to realize a controllable transmission connection between the inner motor shaft 113 and the outer motor shaft 124. That is, the clutch CL can make the inner motor shaft 113 and the outer motor shaft 124 drive or disconnect the transmission connection.

[0071] On the axial direction A of the conjugate stator motor 10, the clutch CL is located between the first gear 31 and the third gear 41.

[0072] Here, the clutch CL can be a wet clutch, a dog clutch, a synchronizer, or other similar types.

[0073] Here, because the clutch CL is located away from the conjugate stator motor 10, specifically on the axial side of the outer rotor support 123, the connection position of the outer rotor support 123 and the outer motor shaft 124 is close to the rotor and stator of the conjugate stator motor 10 in the axial direction A. This can improve the support stiffness of the outer motor rotor 122, thereby providing better robustness and durability.

[0074] exist Figure 1 In the first embodiment shown with a clutch CL, the vehicle drive system can be a plug-in hybrid system. When the clutch CL is engaged, the power from the engine 20 can be transmitted to the differential 50 via the shock absorber 60, the first gear transmission mechanism 30, the clutch CL, and the second gear transmission mechanism 40. The vehicle's operating modes can include engine-driven mode, hybrid drive mode in which the engine and electric motor work together, etc.

[0075] Optionally, see Figure 2 The inner motor rotor 112 and the outer motor rotor 122 can be completely decoupled, and the inner motor shaft 113 and the outer motor shaft 124 can be completely decoupled. Figure 2 The vehicle drive system shown does not have a clutch, so the inner motor rotor 112 and the outer motor rotor 122 can rotate independently (i.e., decoupled).

[0076] exist Figure 2 In the embodiment shown, the power of the engine 20 can drive the internal motor 11 to generate electricity through the shock absorber 60, the second gear 32, the first gear 31, the internal motor shaft 113, and the internal motor rotor 112, thus forming the power generation unit of the range-extended drive system.

[0077] The power of the external motor 12 can drive the vehicle through the third gear 41, the fourth gear 42, the intermediate shaft 45, the fifth gear 43, the sixth gear 44, and the differential 50, thus forming the drive unit of the range-extended drive system.

[0078] exist Figure 2 In the embodiment shown, by eliminating the clutch, higher system efficiency can be achieved, a more compact layout can be realized, and the vehicle's energy consumption level and driving range can be improved.

[0079] Optionally, at the other axial end of the conjugate stator motor 10, the inner motor shaft 113 is supported by a fourth bearing B4 to the housing of the conjugate stator motor 10 or the vehicle drive system. More specifically, the portion of the inner motor shaft 113 extending axially from the end of the inner rotor support can be supported by the fourth bearing B4 to the housing of the conjugate stator motor 10 or the vehicle drive system.

[0080] Thus, the inner motor rotor 112 can be supported on the housing of the conjugate stator motor 10 or the vehicle drive system via the inner rotor support 114, the inner motor shaft 113, and the fourth bearing B4. The other axial end of the inner motor shaft 113 can be supported on the housing of the conjugate stator motor 10 or the vehicle drive system via the second bearing B2, the inner rotor support 114, the inner motor shaft 113, and the fourth bearing B4. Introducing the fourth bearing B4 into the support for the other axial end of the inner motor shaft 113 also forms a stable support at that end.

[0081] Optionally, see Figure 3 The stator core 110 may include multiple silicon steel sheets integrally stamped. The multiple silicon steel sheets are stacked to form the core body 119. The inner periphery of the core body 119 is provided with multiple inner stator conductor slots 118, and the outer periphery of the core body 119 is provided with multiple outer stator conductor slots 117.

[0082] It is understood that the inner stator conductor slot 118 is located near the radial inner side of the iron core body 119, while the outer stator conductor slot 117 is located near the radial outer side of the iron core body 119. Multiple outer stator conductor slots 117 can be evenly arranged at intervals C along the circumferential direction, and multiple inner stator conductor slots 118 can be evenly arranged at intervals C along the circumferential direction.

[0083] Furthermore, the slot opening of the inner stator conductor slot 118 faces the radially inner side of the core body 119, and the slot opening of the outer stator conductor slot 117 faces the radially outer side of the core body 119. Specifically, the inner stator conductor slot 118 is used to install the stator winding of the inner motor 11, forming the inner motor winding 115; the outer stator conductor slot 117 is used to install the stator winding of the outer motor 12, forming the outer motor winding 125.

[0084] Optionally, the first gear transmission mechanism 30 includes a first gear pair, which consists of a first gear 31 in the form of an external gear and a second gear 32 in the form of an internal gear ring. The first gear 31 is driven to the inner motor shaft 113, and the second gear 32 is driven to the engine 20. The number of teeth of the second gear 32 is greater than the number of teeth of the first gear 31.

[0085] The second gear transmission mechanism 40 includes a second gear pair, a third gear pair, and an intermediate shaft 45. The second gear pair includes a third gear 41 and a fourth gear 42 that mesh with each other. The third gear 41 is driven to the external motor shaft 124, and the fourth gear 42 is driven to the intermediate shaft 45.

[0086] The third gear pair includes a fifth gear 43 and a sixth gear 44 that mesh with each other. The fifth gear 43 is driven to the intermediate shaft 45, and the sixth gear 44 constitutes the input gear of the differential 50.

[0087] Furthermore, the differential 50 may include two half-shafts 51 and 52. A bearing is provided on each of the left and right sides of the housing of the differential 50 for supporting the differential 50.

[0088] Preferably, the inner motor shaft 113, the outer motor shaft 124, the intermediate shaft 45, and the half shafts 51 and 52 are arranged in parallel to each other.

[0089] Furthermore, observing along at least one radial direction R of the conjugate stator motor 10, it can be found that the first gear pair and the third gear pair overlap each other, and the second gear pair and the differential 50 overlap each other. It can be understood that, viewed from the radial direction R of the conjugate stator motor 10, the first gear pair and the third gear pair are located in the same axial position; similarly, the second gear pair and the differential 50 are also located in the same axial position. This facilitates a reduction in the axial dimensions of the vehicle drive system, thereby enabling a smaller overall shape and improved compactness.

[0090] Furthermore, the engine 20 and the conjugate stator motor 10 are located on both sides of the first gear pair and the second gear pair along the axial direction A, respectively.

[0091] In the embodiments of this application, the two motors of the conjugate stator motor 10 can occupy the same axial space, which can reduce the axial dimension of the vehicle drive system.

[0092] Embodiments of this application also provide a vehicle including a vehicle drive system with a conjugate stator motor according to this application.

Claims

1. A vehicle drive system with a conjugate stator motor, characterized in that, include: A conjugate stator motor includes an inner motor and an outer motor. The inner motor includes an inner motor stator, an inner motor rotor located radially inside the inner motor stator, and an inner motor shaft driven to the inner motor rotor. The outer motor includes an outer motor stator, an outer motor rotor located radially outside the outer motor stator, and an outer motor shaft driven to the outer motor rotor. The inner motor stator and the outer motor stator share a stator core. The first gear transmission mechanism, the second gear transmission mechanism, and the differential; and An engine, which is connected to the internal motor shaft via the first gear transmission mechanism, is used to drive the internal motor to generate electricity. The external motor rotor is connected to the differential via the external motor shaft and the second gear transmission mechanism, and is used to drive the vehicle. At one axial end of the conjugate stator motor, the outer motor shaft is supported by a first bearing; at the other axial end of the conjugate stator motor, a second bearing is provided between the inner motor rotor and the outer motor shaft.

2. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, A third bearing is provided at one axial end of the conjugate stator motor between the inner motor shaft and the outer motor shaft.

3. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, The inner motor further includes an inner rotor support, which drivesly connects the inner motor rotor and the inner motor shaft. The second bearing is disposed between the inner rotor support and the outer motor shaft; and / or The external motor further includes an external rotor bracket, which drivesly connects the external motor rotor and the external motor shaft. The first bearing includes: a bearing disposed between the external rotor bracket and the housing of the conjugate stator motor or the vehicle drive system; and a bearing disposed between the external motor shaft and the housing of the conjugate stator motor or the vehicle drive system.

4. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, The second bearing comprises two needle roller bearings arranged axially side by side.

5. The vehicle drive system with a conjugate stator motor according to claim 3, characterized in that, The inner rotor support includes an inner rotor support cylindrical portion and an inner rotor support end portion located at the other axial end of the inner rotor support cylindrical portion. The inner rotor support end portion is located at the other axial end of the conjugate stator motor. The outer motor shaft is located on one axial side of the inner rotor support end portion, and the inner motor shaft is drively connected to the inner rotor support end portion. The second bearing is disposed between the inner rotor support cylindrical portion and the other axial end of the outer motor shaft. The outer rotor support includes an outer rotor support cylindrical portion and an outer rotor support end located at one axial end of the outer rotor support cylindrical portion. The outer rotor support end is located at one axial end of the conjugate stator motor, and the middle position of the outer motor shaft is connected to the outer rotor support end.

6. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, The first gear transmission mechanism includes a first gear coaxially connected to the inner motor shaft, and the second gear transmission mechanism includes a third gear coaxially connected to the outer motor shaft. The vehicle drive system also includes a clutch disposed between the inner motor shaft and the outer motor shaft, for realizing a controllable transmission connection between the inner motor shaft and the outer motor shaft. The clutch is located between the first gear and the third gear in the axial direction of the conjugate stator motor.

7. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, The inner motor rotor and the outer motor rotor are completely decoupled, and the inner motor shaft and the outer motor shaft are completely decoupled.

8. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, At the other axial end of the conjugate stator motor, the inner motor shaft is supported by a fourth bearing on the housing of the conjugate stator motor or the vehicle drive system.

9. The vehicle drive system with a conjugate stator motor according to claim 1, characterized in that, The first gear transmission mechanism includes a first gear pair, which consists of a first gear in the form of an external gear and a second gear in the form of an internal gear ring. The first gear is driven to the internal motor shaft, and the second gear is driven to the engine. The number of teeth of the second gear is greater than the number of teeth of the first gear. The second gear transmission mechanism includes a second gear pair, a third gear pair, and an intermediate shaft. The second gear pair includes a third gear and a fourth gear that mesh with each other. The third gear is driven to the external motor shaft, and the fourth gear is driven to the intermediate shaft. The third gear pair includes a fifth gear and a sixth gear that mesh with each other. The fifth gear is driven to the intermediate shaft, and the sixth gear constitutes the input gear of the differential.

10. A vehicle, characterized in that, The vehicle drive system including any one of claims 1 to 9, which has a conjugate stator motor.

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