A dual-motor electric drive assembly and a vehicle

Abstract

The present invention provides a dual-motor electric drive assembly and a vehicle. The dual-motor electric drive assembly includes: two motors; two first transmission mechanisms, each first transmission mechanism having a first input part, a first output part and a second output part, at most one of the first output part and the second output part being in transmission cooperation with the first input part, the two motors being in transmission cooperation with the two first input parts; a differential and two second transmission mechanisms, located on the same side of the first transmission mechanism, the differential being located between the two second transmission mechanisms, the differential having a second input part and two third output parts corresponding to the two second transmission mechanisms, each second transmission mechanism having a third input part and a fourth output part, at most one of the third output part and the third input part being in transmission cooperation with the fourth output part, and both first output parts being in transmission cooperation with the second input part. This dual-motor electric drive assembly not only has low performance requirements for a single motor, but also has functions such as differential.

Description

Technical Field

[0001] This application relates to vehicle technology, particularly to a dual-motor electric drive assembly and a vehicle. Background Art

[0002] Currently, most pure electric vehicles adopt a single-motor solution (the single-motor solution means: the pure electric vehicle includes a single-motor front drive axle or a single-motor rear drive axle) or a front and rear dual-motor solution (the front and rear dual-motor solution means: the pure electric vehicle includes a single-motor front drive axle and a single-motor rear drive axle). In the above two solutions, since a single motor is in transmission cooperation with two wheels, for a pure electric vehicle to output a higher speed, the single motor needs to improve its performance to a higher level, which requires a significant increase in the volume and weight of the single motor, severely restricting the development of high-performance pure electric vehicles. Summary of the Invention

[0003] To solve at least one of the above technical problems, this application provides a dual-motor electric drive assembly, which not only has low requirements for the performance of a single motor but also has functions such as differential.

[0004] This application also provides a vehicle.

[0005] The dual-motor electric drive assembly provided by the embodiments of the present invention includes: two motors; two first transmission mechanisms, each of which has a first input part, a first output part, and a second output part, at most one of the first output part and the second output part is in transmission cooperation with the first input part, the two first output parts are located between the two second output parts, and the two motors are in one-to-one transmission cooperation with the two first input parts; and a differential and two second transmission mechanisms, located on the same side of the first transmission mechanism, the differential is located between the two second transmission mechanisms, the differential has a second input part and two third output parts corresponding to the two second transmission mechanisms one by one, each of the second transmission mechanisms has a third input part and a fourth output part, the two third output parts are located between the two fourth output parts, at most one of the third output part and the third input part is in transmission cooperation with the fourth output part, and the two first output parts are both in transmission cooperation with the second input part.

[0006] In an exemplary embodiment, each of the first transmission mechanisms includes a first driving member, a first transmission mating member, a second transmission mating member, and a first transmission member movably disposed. The first driving member is located between the first transmission mating member and the second transmission mating member and is in transmission cooperation with the first transmission member. The first transmission member is also in transmission cooperation with at most one of the first transmission mating member and the second transmission mating member. The first input portion is located on the first driving member, and one of the first output portion and the second output portion is located on the first transmission mating member, and the other is located on the second transmission mating member.

[0007] In an exemplary embodiment, two of the second transmission mating members are located between two of the first transmission mating members, and two of the first transmission mating members are located between two of the motors. Each of the first transmission mating members includes a first engaging portion and a first transmission tooth, and each of the second transmission mating members includes a second engaging portion and a second transmission tooth. The first engaging portion and the second engaging portion are located between the first transmission tooth and the second transmission tooth. The first driving member, the first engaging portion, and the second engaging portion are all located inside the first transmission member. The first transmission member is in transmission cooperation with at most one of the first engaging portion and the second engaging portion. The first input portion passes through the first transmission mating member and is in transmission cooperation with the motor. The first output portion is the second transmission tooth, and the second output portion is the first transmission tooth.

[0008] In an exemplary embodiment, two of the second transmission mating members are drivingly connected together and share the second transmission tooth.

[0009] In an exemplary embodiment, each of the second transmission mechanisms includes a second driving member, a third transmission mating member, and a second transmission member movably disposed. The second driving member is located between the third output portion and the third transmission mating member. The second driving member is in transmission cooperation with at most one of the third transmission mating member and the third output portion. The third input portion is located on the third transmission mating member, and the fourth output portion is located on the second driving member.

[0010] In an exemplary embodiment, the third transmission mating member includes a third engaging portion and a third transmission tooth. Two of the third engaging portions are located between two of the third transmission teeth. The second driving member, the third output portion, and the third engaging portion are all located inside the second transmission member. The second driving member is in transmission cooperation with one of the third engaging portion and the third output portion. The fourth output portion passes through the third transmission mating member, and the third input portion is the third transmission tooth.

[0011] In an exemplary embodiment, the second input portion is located between two of the third output portions.

[0012] In an exemplary embodiment, the differential is an open differential.

[0013] The vehicle provided by an embodiment of the present invention includes wheels and the dual-motor electric drive assembly described in any one of the above embodiments, and the wheels are in transmission cooperation with the fourth output portion.

[0014] In an exemplary embodiment, the vehicle is an electric vehicle.

[0015] The dual-motor electric drive assembly provided by the present application can be driven by two motors or a single motor. When driven by two motors, the requirements for high-power output can be achieved through two motors with lower power. When driven by a single motor, functions such as differential can be realized.

[0016] Other features and advantages of the present application will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present application. Other advantages of the present application can be realized and obtained through the solutions described in the specification and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide an understanding of the technical solutions of the present application, and constitute a part of the specification. They are used together with the embodiments of the present application to explain the technical solutions of the present application, and do not constitute a limitation to the technical solutions of the present application.

[0018] Figure 1 It is a schematic structural diagram of the dual-motor electric drive assembly according to an embodiment of the present invention.

[0019] Among them, Figure 1 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0020] 100 motor, 200 first transmission mechanism, 210 first driving member, 211 first input portion, 220 first transmission mating member, 221 first engaging portion, 222 second output portion, 230 second transmission mating member, 231 second engaging portion, 232 first output portion, 240 first transmission member, 300 differential, 310 second input portion, 320 fourth engaging portion, 400 second transmission mechanism, 410 second driving member, 411 fourth output portion, 420 third transmission mating member, 421 third engaging portion, 422 third transmission gear, 430 second transmission member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] This application describes multiple embodiments, but the description is exemplary rather than restrictive. To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined arbitrarily with each other.

[0022] The dual-motor electric drive assembly provided by the embodiment of the present invention, as Figure 1 shown, includes: two motors 100; two first transmission mechanisms 200, each first transmission mechanism 200 having a first input portion 211, a first output portion 232, and a second output portion 222, at most one of the first output portion 232 and the second output portion 222 being in transmission cooperation with the first input portion 211, the two first output portions 232 being located between the two second output portions 222, and the two motors 100 being in one-to-one transmission cooperation with the two first input portions 211; and a differential 300 and two second transmission mechanisms 400, located on the same side of the first transmission mechanism 200, the differential 300 being located between the two second transmission mechanisms 400, the differential 300 having a second input portion 310 and two third output portions corresponding one-to-one to the two second transmission mechanisms 400, each second transmission mechanism 400 having a third input portion and a fourth output portion 411, the two third output portions being located between the two fourth output portions 411, at most one of the third output portion and the third input portion being in transmission cooperation with the fourth output portion 411, and the two first output portions 232 both being in transmission cooperation with the second input portion 310.

[0023] This dual-motor electric drive assembly can be driven by two motors 100 or by a single motor 100. When driven by two motors 100, the requirements for high-power output can be achieved by two motors 100 with lower power. When driven by a single motor 100, the function of differential can be realized.

[0024] When driven by two motors 100, the two first input portions 211 are in transmission cooperation with the two second output portions 222, the third input portion and the fourth output portion 411 are in transmission cooperation, and power is output through the two fourth output portions 411.

[0025] When driven by a single motor 100, one first input portion 211 is in transmission cooperation with one first output portion 232, the other first input portion 211 is not in transmission cooperation with either the first output portion 232 or the second output portion 222, the first output portion 232 is in transmission cooperation with the second input portion 310, the two fourth output portions 411 are in transmission cooperation with the two third output portions, power is output through the two fourth output portions 411, and the two fourth output portions 411 achieve differential through the differential 300.

[0026] In an exemplary embodiment, as Figure 1 shown, each first transmission mechanism 200 includes a first driving member 210, a first transmission mating member 220, a second transmission mating member 230, and a first transmission member 240 that is movably arranged (which can be annular or non-annular). The first driving member 210, the first transmission mating member 220, and the second transmission mating member 230 are all located inside the first transmission member 240 (wherein both the first transmission mating member 220 and the second transmission mating member 230 are partially located inside the first transmission member 240). The first driving member 210 is located between the first transmission mating member 220 and the second transmission mating member 230 and is in transmission cooperation with the first transmission member 240. The first transmission member 240 is also in transmission cooperation with at most one of the first transmission mating member 220 and the second transmission mating member 230. The first input portion 211 is located on the first driving member 210, and one of the first output portion 232 and the second output portion 222 is located on the first transmission mating member 220, and the other is located on the second transmission mating member 230.

[0027] For each first transmission mechanism 200: In the initial position, the first driving member 210 meshes with the first transmission member 240, and neither the first transmission mating member 220 nor the second transmission mating member 230 meshes with the first transmission member 240; when the first transmission member 240 moves towards the first transmission mating member 220, both the first driving member 210 and the first transmission mating member 220 mesh with the first transmission member 240; when the first transmission member 240 moves towards the second transmission mating member 230, both the first driving member 210 and the second transmission mating member 230 mesh with the first transmission member 240. By switching the position of the first transmission member 240, single-motor 100 output or dual-motor 100 output is achieved. Of course, it can also be that in the initial position, the first driving member 210, the first transmission member 240, and the first transmission mating member 220 mesh, and the second transmission mating member 230 does not mesh with the first transmission member 240; of course, it can also be that in the initial position, the first driving member 210, the first transmission member 240, and the second transmission mating member 230 mesh, and the first transmission mating member 220 does not mesh with the first transmission member 240; those skilled in the art can make reasonable settings according to needs, and all can achieve the purpose of this application. Its gist does not depart from the design concept of the present invention, and will not be elaborated here, and all should fall within the protection scope of this application.

[0028] In an example, as Figure 1As shown, the two second transmission fittings 230 are located between the two first transmission fittings 220, the two first transmission fittings 220 are located between the two motors 100, and the first input part 211 passes through the first transmission fittings 220 to be transmission-matched with the motor 100. Wherein, each first transmission fitting 220 includes a first coupling part 221 and a first transmission tooth, each second transmission fitting 230 includes a second coupling part 231 and a second transmission tooth, the first coupling part 221 and the second coupling part 231 are located between the first transmission tooth and the second transmission tooth, the first active member 210, the first coupling part 221 and the second coupling part 231 are all located on the inner side of the first transmission member 240, the first active member 210 is transmission-matched with at most one of the first coupling part 221 and the second coupling part 231 through the first transmission member 240, the first output part 232 is a second transmission tooth, and the second output part 222 is a first transmission tooth.

[0029] For each first transmission mechanism 200: in the initial position, the first active member 210 is engaged with the first transmission member 240, and the first coupling portion 221 and the second coupling portion 231 are not engaged with the first transmission member 240; the two first transmission members 240 move toward the two first transmission matching members 220 respectively, and the first active member 210 and the first coupling portion 221 are both engaged with the first transmission member 240, so as to realize the output of the dual motor 100; one first transmission member 240 moves toward the second transmission matching member 230, and the other first transmission member 240 is located in the initial position, and one first active member 210 and one second coupling portion 231 are both engaged with one first transmission member 240, so as to realize the output of the single motor 100. Of course, it is also possible that, in the initial position, the first active member 210, the first transmission member 240 and the first coupling portion 221 are engaged, and the second coupling portion 231 is not engaged with the first transmission member 240; of course, it is also possible that, in the initial position, the first active member 210, the first transmission member 240 and the second coupling portion 231 are engaged, and the first coupling portion 221 is not engaged with the first transmission member 240; those skilled in the art can make reasonable settings as needed, and the purpose of this application can be achieved. Its purpose does not deviate from the design concept of the present invention, and will not be repeated here, and should all fall within the protection scope of this application.

[0030] In one example, if Figure 1 As shown, the two second transmission fittings 230 are transmission-connected together and share the second transmission teeth, so that the structure of the first transmission mechanism is simpler.

[0031] In one embodiment, the first driving member 210 is a gear hub, the first engaging portion 221 and the second engaging portion 231 are both engaging teeth, and the first transmission member 240 is a gear sleeve. These components form a synchronizer transmission structure. Of course, other structures equivalent to the synchronizer transmission structure can also be used for substitution, such as a clutch transmission structure, which can also achieve the purpose of this application. Its gist does not depart from the design concept of the present invention and will not be elaborated here, and all should fall within the protection scope of this application.

[0032] In an exemplary embodiment, as Figure 1 shown, each second transmission mechanism 400 includes a second driving member 410, a third transmission cooperating member 420, and a second transmission member 430 that is movably arranged (which can be annular or non-annular). The third output portion is the fourth engaging portion 320. The second driving member 410, the fourth engaging portion 320, and the third transmission cooperating member 420 are all located inside the second transmission member 430 (wherein, the third transmission cooperating member 420 is partially located inside the second transmission member 430). The second driving member 410 is located between the fourth engaging portion 320 and the third transmission cooperating member 420 and is in transmission cooperation with the second transmission member 430. The second transmission member 430 is also in transmission cooperation with at most one of the third transmission cooperating member 420 and the fourth engaging portion 320. The third input portion is located at the third transmission cooperating member 420, and the fourth output portion 411 is located at the second driving member 410.

[0033] For each second transmission mechanism 400: In the initial position, the second driving member 410 is engaged with the second transmission member 430, and neither the third transmission cooperating member 420 nor the fourth engaging portion 320 is engaged with the second transmission member 430; when the second transmission member 430 moves towards the third transmission cooperating member 420, both the second driving member 410 and the third transmission cooperating member 420 are engaged with the second transmission member 430 to assist in realizing the output of the dual motors 100; when the second transmission member 430 moves towards the fourth engaging portion 320, both the second driving member 410 and the fourth engaging portion 320 are engaged with the second transmission member 430 to assist in realizing the output of the single motor 100. Of course, it can also be that for each second transmission mechanism 400: in the initial position, the second driving member 410, the second transmission member 430, and the third transmission cooperating member 420 are engaged; and it can also be that for each second transmission mechanism 400: in the initial position, the second driving member 410, the second transmission member 430, and the fourth engaging portion 320 are engaged; those skilled in the art can make reasonable settings according to needs, which can all achieve the purpose of this application. Its gist does not depart from the design concept of the present invention and will not be elaborated here, and all should fall within the protection scope of this application.

[0034] Among them, as Figure 1As shown, the fourth output part 411 extends through the third transmission fitting 420 and is arranged to be connected to the wheel; wherein, the third transmission fitting 420 includes a third engaging part 421 and a third transmission gear 422, and the two third engaging parts 421 are located between the two third transmission gears 422. The second driving part 410, the fourth engaging part 320 and the third engaging part 421 are all located inside the second transmission part 430. The second driving part 410 is selectively in transmission cooperation with the third engaging part 421 and the fourth engaging part 320 through the second transmission part 430, and the third input part is the third transmission gear 422.

[0035] For each second transmission mechanism 400: In the initial position, the second driving part 410 is engaged with the second transmission part 430, and neither the third transmission fitting 420 nor the fourth engaging part 320 is engaged with the second transmission part 430; the second transmission part 430 moves towards the third transmission fitting 420, and both the second driving part 410 and the third engaging part 421 are engaged with the second transmission part 430 to assist in realizing the output of the dual motors 100; the second transmission part 430 moves towards the fourth engaging part 320, and both the second driving part 410 and the fourth engaging part 320 are engaged with the second transmission part 430 to assist in realizing the output of the single motor 100. Of course, it can also be that for each second transmission mechanism 400: In the initial position, the second driving part 410, the second transmission part 430 and the third engaging part 421 are engaged; of course, it can also be that for each second transmission mechanism 400: In the initial position, the second driving part 410, the second transmission part 430 and the fourth engaging part 320 are engaged; those skilled in the art can make reasonable settings according to needs, and the purpose of this application can be achieved. The gist thereof does not depart from the design concept of the present invention, and will not be elaborated herein, and all should fall within the protection scope of this application.

[0036] In one embodiment, the second driving part 410 is a gear hub, the third engaging part 421 and the fourth engaging part 320 are both engaging teeth, and the second transmission part 430 is a gear sleeve. These components constitute a synchronizer transmission structure. Of course, other structures equivalent to the synchronizer transmission structure can also be used for substitution, and the purpose of this application can also be achieved. The gist thereof does not depart from the design concept of the present invention, and will not be elaborated herein, and all should fall within the protection scope of this application. In one exemplary embodiment, as Figure 1 shown, the differential 300 is an open differential 300, the second input part 310 is located between the two fourth engaging parts 320, and the second input part 310 is arranged as a gear or a gear ring.

[0037] Output of dual motors 100: Two first driving members 210 are meshed with two first engaging portions 221 through two first transmission members 240; two second driving members 410 are meshed with two third engaging portions 421 through two second transmission members 430. Power transmission: Two motors 100 → Two first driving members 210 → Two first transmission members 240 → Two first engaging portions 221 → Two first transmission mating members 220 → Two first transmission teeth (i.e., second output portions 222) → Two third transmission teeth 422 → Two third transmission mating members 420 → Two third engaging portions 421 → Two second transmission members 430 → Two second driving members 410 → Two fourth output portions 411.

[0038] Output of the left single motor 100: The first driving member 210 on the left is meshed with the second engaging portion 231 on the left through the first transmission member 240 on the left, and the first driving member 210 on the right is meshed with the first transmission member 240 on the right (the first transmission member 240 on the right is neither meshed with the first engaging portion 221 on the right nor meshed with the second engaging portion 231 on the right). Two second driving members 410 are meshed with two fourth engaging portions 320 through two second transmission members 430. Power transmission: The motor 100 on the left → The first driving member 210 on the left → The first transmission member 240 on the left → The second engaging portion 231 on the left → The second transmission mating member 230 on the left → Transmission teeth (i.e., first output portion 232) → Second input portion 310 → Two fourth engaging portions 320 → Two second transmission members 430 → Two second driving members 410 → Two fourth output portions 411.

[0039] Output of the right single motor 100: The first driving member 210 on the right is meshed with the second engaging portion 231 on the right through the first transmission member 240 on the right, and the first driving member 210 on the left is meshed with the first transmission member 240 on the left (the first transmission member 240 on the left is neither meshed with the first engaging portion 221 on the left nor meshed with the second engaging portion 231 on the left). Two second driving members 410 are meshed with two fourth engaging portions 320 through two second transmission members 430. Power transmission: The motor 100 on the right → The first driving member 210 on the right → The first transmission member 240 on the right → The second engaging portion 231 on the right → The second transmission mating member 230 on the right → Transmission teeth (i.e., first output portion 232) → Second input portion 310 → Two fourth engaging portions 320 → Two second transmission members 430 → Two second driving members 410 → Two fourth output portions 411.

[0040] Under the condition of dual motors 100, the two motors 100 can be controlled separately, and the two motors 100 can be controlled respectively according to the power demand, and functions such as differential, differential lock, and vector control can be realized, and the control is precise.

[0041] Under the condition of a single motor 100, any one of the motors 100 can drive two fourth output parts 411 to output power, and at the same time, the differential function can also be realized under the condition of a single motor 100.

[0042] The vehicle (not shown in the figure) provided by the embodiment of the present invention includes wheels and the dual-motor electric drive assembly described in any one of the above embodiments, and the wheels are in transmission cooperation with the fourth output part 411.

[0043] This vehicle has all the advantages of the dual-motor electric drive assembly provided in any one of the above embodiments, which will not be elaborated here.

[0044] In one example, the vehicle is set as an electric vehicle.

[0045] To sum up, the dual-motor electric drive assembly provided by this application can be driven by two motors or a single motor; when driven by two motors, the requirements of high-power output can be achieved through two motors with lower power; when driven by a single motor, the differential function can be realized.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "the structure of the character 'kou'" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0047] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, terms such as "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; terms such as "installation", "connection", "fixed connection" can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] Although the disclosed embodiments of the present invention are as above, the content described is only the embodiments adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art within the scope of the present invention can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention. However, the scope of patent protection of the present invention shall still be defined by the appended claims.

Claims

1. A dual-motor electric drive assembly, characterized in that, include: Two motors; Two first transmission mechanisms, each of which has a first input part, a first output part, and a second output part, at most one of the first output part and the second output part is in transmission cooperation with the first input part, the two first output parts are located between the two second output parts, and the two motors are in transmission cooperation with the two first input parts in a one-to-one correspondence; A differential and two second transmission mechanisms are located on the same side of the first transmission mechanism, the differential is located between the two second transmission mechanisms, the differential has a second input part and two third output parts corresponding to the two second transmission mechanisms one by one, each of the second transmission mechanisms has a third input part and a fourth output part, the two third output parts are located between the two fourth output parts, at most one of the third output part and the third input part is in transmission cooperation with the fourth output part, and the two first output parts are both in transmission cooperation with the second input part.

2. The dual-motor electric drive assembly according to claim 1, characterized in that, Each of the first transmission mechanisms includes a first active member, a first transmission mating member, a second transmission mating member and a movably arranged first transmission member, the first active member is located between the first transmission mating member and the second transmission mating member and is in transmission cooperation with the first transmission member, the first transmission member is also in transmission cooperation with at most one of the first transmission mating member and the second transmission mating member, the first input part is located at the first active member, one of the first output part and the second output part is located at the first transmission mating member, and the other is located at the second transmission mating member.

3. The dual-motor electric drive assembly according to claim 2, characterized in that, The two second transmission fittings are located between the two first transmission fittings, and the two first transmission fittings are located between the two motors. Each of the first transmission fittings includes a first combining portion and a first transmission tooth, and each of the second transmission fittings includes a second combining portion and a second transmission tooth. The first combining portion and the second combining portion are located between the first transmission tooth and the second transmission tooth. The first active member, the first combining portion and the second combining portion are all located on the inner side of the first transmission member. The first transmission member is in transmission cooperation with at most one of the first combining portion and the second combining portion. The first input portion passes through the first transmission fitting and is in transmission cooperation with the motor. The first output portion is the second transmission tooth, and the second output portion is the first transmission tooth.

4. The dual-motor electric drive assembly according to claim 3, characterized in that, The two second transmission fittings are transmission-connected together and share the second transmission tooth.

5. The dual-motor electric drive assembly according to claim 1, characterized in that, Each of the second transmission mechanisms includes a second active member, a third transmission matching member and a movably arranged second transmission member, wherein the second active member is located between the third output part and the third transmission matching member, the second active member is transmission-matched with at most one of the third transmission matching member and the third output part, the third input part is located at the third transmission matching member, and the fourth output part is located at the second active member.

6. The dual-motor electric drive assembly according to claim 5, characterized in that, The third transmission fitting includes a third engaging portion and third transmission teeth. The two third engaging portions are located between the two third transmission teeth. The second driving member, the third output portion, and the third engaging portion are all located inside the second transmission member. The second driving member is selectively in transmission cooperation with the third engaging portion and the third output portion. The fourth output portion passes through the third transmission fitting, and the third input portion is the third transmission teeth.

7. The dual-motor electric drive assembly according to claim 1, characterized in that, The second input portion is located between the two third output portions.

8. The dual-motor electric drive assembly according to any one of claims 1 to 7, characterized in that, The differential is an open differential.

9. A vehicle, characterized in that, It includes wheels and the dual-motor electric drive assembly according to any one of claims 1 to 8. The wheels are in transmission cooperation with the fourth output portion.

10. The vehicle according to claim 9, characterized in that, The vehicle is an electric vehicle.

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