Double-motor electric drive axle

Abstract

The double-motor electric drive axle comprises a first motor, a second motor, a first output shaft and a second output shaft, the first output shaft and the second output shaft are coaxially arranged, and the outer side of the first output shaft and the outer side of the second output shaft are both connected to a hub; the first motor and the second motor are arranged in the radial direction, a motor shaft of the first motor is in transmission connection with the first output shaft through the first transmission assembly, a motor shaft of the second motor is in transmission connection with the second output shaft through the second transmission assembly, and the first motor and the second motor are both located between the first transmission assembly and the second transmission assembly in the axial position. In the radial position, the radial size of the first motor and the radial size of the second motor are not larger than the radial size of the first transmission assembly or the second transmission assembly. The invention has the main beneficial effects that the layout is reasonable, the axial size can be greatly reduced by the radial arrangement of the first motor and the second motor, the occupied chassis structure arrangement space is reduced, and the dynamic property and the economical efficiency of the whole vehicle can be both considered to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle technology, and in particular to a dual-motor electric drive axle. Background Art

[0002] The rapid development of the automobile industry and the increasing demand for automobiles have led to a continuous increase in automobile production and ownership, which has aggravated the energy and environmental problems that people are currently concerned about. Pure electric vehicles have the characteristics of low noise, no pollution, diversified energy sources, and high energy efficiency, and are an important way to solve automobile problems in urbanization. As the current mainstream drive system, the dual-motor electric drive structure generally includes two drive motors. For example, Chinese patent CN109677261 discloses a dual-motor variable speed drive device, in which the two motors are arranged in parallel and the wheels are controlled by a differential after passing through a common transmission component; for example, the dual-motor drive axle disclosed in Chinese patents CN109263454, CN112519504, and CN210733713 includes two drive motors arranged transversely and coaxially, and the wheels are controlled by a differential after passing through a common transmission component. Such a design can reasonably allocate power output.

[0003] Another dual-motor electric drive structure currently on the market generally uses two drive motors to drive the corresponding wheels separately, which can achieve separate control of the wheels and achieve the handling stability of the entire vehicle. For example, in Chinese patent CN115465068, two drive motors are coaxially arranged relative to each other, and the power is transmitted to the corresponding wheels through the transmission assembly. The motor, transmission assembly, wheel axle, etc. are all radially arranged, resulting in particularly high space requirements for the entire vehicle. Generally, the chassis needs to be specially customized or it can only be used on specific vehicles, which has certain limitations.

[0004] Chinese patent 213007565 arranges two coaxially arranged motors on the inner side of the transmission assembly, that is, the two drive motors, two sets of transmission assemblies, and wheel axles are all coaxially arranged. Although this solves the problem of radial dimension, the axial dimension of such an electric drive axle (the distance between the first wheel and the second wheel) is particularly long, which will occupy the chassis structure layout space, affect the number of battery arrangements and transmission efficiency, resulting in a short vehicle range, and it is difficult to take into account the power and economy of the vehicle.

[0005] Therefore, how to take into account the radial and axial dimensions of the vehicle chassis, how to reasonably allocate power output, and how to achieve a balance between power and economy are problems that technical personnel need to solve at present. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a dual-motor electric drive axle.

[0007] The purpose of the present invention is achieved through the following technical solutions: A dual-motor electric drive axle comprises a first motor and a second motor, a first output shaft and a second output shaft arranged coaxially, the outer sides of the first output shaft and the second output shaft are both connected to a wheel hub; the first motor and the second motor are arranged radially, the motor shaft of the first motor is connected to the first output shaft through a first transmission assembly, and the motor shaft of the second motor is connected to the second output shaft through a second transmission assembly, in axial position, the first motor and the second motor are both located between the first transmission assembly and the second transmission assembly, and in radial position, the radial dimensions of the first motor and the second motor are not greater than the radial dimensions of the first transmission assembly or the second transmission assembly.

[0008] Preferably, the first motor and the second motor share a motor housing.

[0009] Preferably, the first motor and the second motor are arranged in close proximity.

[0010] Preferably, the first transmission assembly includes a first transmission shaft, on which a first large reduction wheel and a first small reduction wheel are fixed, the first large reduction wheel meshing with a first driving wheel fixed on the motor shaft of the first motor; the first small reduction wheel meshing with a first driven wheel fixed on the first output shaft.

[0011] Preferably, the second transmission assembly includes a second transmission shaft, a second driving wheel is fixedly provided on the motor shaft of the second motor, a second driven wheel is fixedly provided on the second output shaft, a second large reduction wheel and a second small reduction wheel are fixedly provided on the second transmission shaft, the second small reduction wheel is meshed with the second driven wheel, and the second large reduction wheel is meshed with the second driving wheel.

[0012] Preferably, the motor shaft of the second motor is coaxially arranged with the second output shaft.

[0013] Preferably, the second transmission assembly at least includes a first ring gear and a second ring gear fixed on the housing, a first sun gear is fixed on the motor shaft of the second motor, a first planet carrier is loosely sleeved on the motor shaft of the second motor, a first planet carrier is provided with a first planetary gear, the first planetary gear is located between the first ring gear and the first sun gear and meshes with both; a linkage wheel is also fixed on the first planet carrier, a second planetary gear is provided between the linkage wheel and the second ring gear and meshes with both, a second planet carrier is provided on the second planetary gear, and the second planet carrier is fixed on the second output shaft.

[0014] Preferably, the first transmission assembly includes at least a first transmission shaft and a second transmission shaft, a first large transmission wheel and a first small transmission wheel are fixedly provided on the first transmission shaft, the first large transmission wheel is meshed with a first driving wheel fixedly provided on the motor shaft of the first motor; a second large transmission wheel and a second small transmission wheel are fixedly provided on the second transmission shaft, the second large transmission wheel is meshed with the first small transmission wheel, and the second small transmission wheel is meshed with a first driven wheel fixedly provided on the first output shaft.

[0015] Preferably, the first transmission assembly at least includes a third ring gear, a third sun gear is fixedly provided on the motor shaft of the first motor, a third planetary carrier is hollowly mounted on the motor shaft of the first motor, a third planetary gear is provided on the third planetary carrier, and the third planetary gear is located between the third ring gear and the third sun gear and meshes with both; a driving wheel is also fixedly provided on the third planetary carrier, and a follower wheel meshing with the driving wheel is fixedly provided on the first output shaft.

[0016] Preferably, the first transmission assembly at least includes a third ring gear and a driving wheel, a third sun gear is fixedly provided on the first output shaft, a third planetary carrier is hollowly mounted on the first output shaft, a third planetary gear is provided on the third planetary carrier, and the third planetary gear is located between the third ring gear and the third sun gear and meshes with both of them; a follower wheel is also fixedly provided on the third planetary carrier, and the follower wheel meshes with the driving wheel fixedly provided on the motor shaft of the first motor.

[0017] The beneficial effects of the present invention are mainly reflected in: 1. Reasonable layout. The radial arrangement of the first motor and the second motor can greatly reduce the axial size and the space occupied by the chassis structure, which can maximize the balance between the power and economy of the vehicle. The radial size of the first motor and the second motor is not greater than the radial size of the first transmission assembly or the second transmission assembly, which can ensure that the size in the radial direction does not increase. This design has relatively low space requirements for the vehicle and has a wide range of applicability. 2. The first motor and the second motor are both located between the first transmission assembly and the second transmission assembly, which can avoid the problem of the first transmission assembly and the second transmission assembly being arranged in the same direction and causing the radial dimension to be too large, thereby reducing the space requirement for the whole vehicle; 3. The first transmission assembly and the second transmission assembly can be adjusted accordingly according to actual needs, so as to meet the needs of more models and have a wider range of applications; 4. The first motor and the second motor are closely arranged or share a motor housing, which can minimize the radial dimension and make them suitable for more vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention is further described below in conjunction with the accompanying drawings: Figure 1 : A schematic structural diagram of the first embodiment of the present invention; Figure 2 : A schematic structural diagram of a second embodiment of the present invention; Figure 3 : A schematic structural diagram of a third embodiment of the present invention; Figure 4 : A schematic structural diagram of a fourth embodiment of the present invention; Figure 5 : A schematic structural diagram of the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0021] like Figures 1 to 5 As shown, the present invention discloses a dual-motor electric drive axle, including a first motor 3 and a second motor 4 and a first output shaft 1 and a second output shaft 2 arranged coaxially, wherein the outer sides of the first output shaft 1 and the second output shaft 2 are both connected to the wheel hub. In addition, the first output shaft 1 and the second output shaft 2 can both be provided with a parking ratchet, and the design of the parking ratchet is prior art, and the present invention will not be elaborated in detail here.

[0022] The first motor 3 and the second motor 4 are arranged radially, which can greatly reduce the axial size and the space occupied by the chassis structure, and can maximize the balance between the power and economy of the vehicle. In this preferred embodiment, the first motor 3 and the second motor 4 are arranged closely together. Of course, the first motor 3 and the second motor 4 can also share a motor housing, thereby minimizing the radial size to the greatest extent, making it suitable for more vehicle models.

[0023] like Figure 1In the first embodiment shown, the motor shaft 30 of the first motor 3 is connected to the first output shaft 1 through the first transmission assembly 5, and the motor shaft 40 of the second motor 4 is connected to the second output shaft 2 through the second transmission assembly 6. In the axial position, the first motor 3 and the second motor 4 are both located between the first transmission assembly 5 and the second transmission assembly 6. In the radial position, the radial size of the first motor 3 and the second motor 4 is not greater than the radial size of the first transmission assembly 5 or the second transmission assembly 6. The above layout is reasonable, the radial size of the first motor and the second motor is not greater than the radial size of the first transmission assembly or the second transmission assembly, which can ensure that the size in the radial direction does not increase. This design has a relatively low space requirement for the whole vehicle and has a wide applicability. In addition, the first motor and the second motor are both located between the first transmission assembly and the second transmission assembly, which can avoid the problem of excessive radial size caused by the same direction arrangement of the first transmission assembly and the second transmission assembly, thereby reducing the space requirement for the whole vehicle.

[0024] In the present invention, the motor shaft 40 of the second motor 4 is coaxially arranged with the second output shaft 2, and the motor shaft 30 of the first motor 3 may not be coaxial with the second output shaft 2. Of course, the motor shaft 30 of the first motor 3 may be coaxially arranged with the second output shaft 2, and the motor shaft 40 of the second motor 4 may not be coaxial with the second output shaft 2, which all belong to the protection scope of the present invention and will not be described in detail here.

[0025] Further Figure 1 In the first embodiment shown, the first transmission assembly 5 includes a first transmission shaft 51, on which a first large reduction wheel 52 and a first small reduction wheel 53 are fixedly provided, the first large reduction wheel 52 is meshed with a first driving wheel 54 fixedly provided on the motor shaft 30 of the first motor 3; the first small reduction wheel 53 is meshed with a first driven wheel 55 fixedly provided on the first output shaft 1.

[0026] The second transmission assembly 6 includes a second transmission shaft 61, a second driving wheel 62 is fixedly provided on the motor shaft 40 of the second motor 4, a second driven wheel 63 is fixedly provided on the second output shaft 2, a second large reduction wheel 64 and a second small reduction wheel 65 are fixedly provided on the second transmission shaft 61, the second small reduction wheel 65 is meshed with the second driven wheel 63, and the second large reduction wheel 64 is meshed with the second driving wheel 62.

[0027] The working process of the first embodiment is briefly described below: the first motor 3 is started to drive the first driving wheel 54 to rotate, the first driving wheel 54 rotates to drive the first large reduction wheel 52 meshing therewith to rotate, the first large reduction wheel 52 drives the first small reduction wheel 53 to rotate through the first output shaft 1, and the first small reduction wheel 53 drives the first output shaft 1 to rotate through the first driven wheel 55. At the same time, the second motor 4 is started to drive the second driving wheel 62 to rotate, the second driving wheel 62 drives the second large reduction wheel 64 to rotate, the second large reduction wheel 64 rotates to drive the second small reduction wheel 65 to rotate through the second transmission shaft 61, and the second small reduction wheel 65 rotates to drive the second output shaft 2 to rotate through the second driven wheel 63.

[0028] In this embodiment, the output power is well transmitted.

[0029] As shown in Figure 2, this is the second embodiment of the present invention, the first transmission assembly 5 includes a first transmission shaft 51, and a first large reduction wheel 52 and a first small reduction wheel 53 are fixedly provided on the first transmission shaft 51, the first large reduction wheel 52 is meshed with a first driving wheel 54 fixedly provided on the motor shaft 30 of the first motor 3; the first small reduction wheel 53 is meshed with a first driven wheel 55 fixedly provided on the first output shaft 1.

[0030] The second transmission assembly 6 at least includes a first gear ring 66 and a second gear ring 67 fixed on the housing, a first sun gear 661 fixed on the motor shaft 40 of the second motor 4, a first planetary carrier 662 is sleeved on the motor shaft of the second motor 4, a first planetary carrier 662 is provided with a first planetary gear 663, the first planetary gear 663 is located between the first gear ring 66 and the first sun gear 661, and meshes with both; a linkage wheel 664 is also fixed on the first planetary carrier 662, a second planetary gear 665 is provided between the linkage wheel 664 and the second gear ring 67, meshing with both, a second planetary carrier 666 is provided on the second planetary gear 665, and the second planetary carrier 666 is fixed on the second output shaft 2. Of course, other single-row planetary gear structures and double-row planetary gear structures are applicable to the present invention, and will not be described in detail here.

[0031] The working process of the second embodiment is briefly described below: the first motor 3 is started to drive the first driving wheel 54 to rotate, the first driving wheel 54 rotates to drive the first large reduction wheel 52 meshed with it to rotate, the first large reduction wheel 52 drives the first small reduction wheel 53 to rotate through the first output shaft 1, and the first small reduction wheel 53 drives the first output shaft 1 to rotate through the first driven wheel 55. At the same time, the second motor 4 is started, and drives the first planet carrier 662 to rotate through the first sun gear 661 and the first planet gear 663 in turn, and the first planet carrier 662 rotates to drive the second planet carrier 666 and the second output shaft 2 fixed thereon to rotate synchronously through the linkage wheel 664 and the second planet gear 665.

[0032] Compared with the first embodiment, this embodiment adopts the arrangement of two single-row planetary gears in series, which can greatly increase the speed ratio; and the axial dimension can also be reduced.

[0033] like Figure 3 As shown, it is the third embodiment of the present invention, the first transmission assembly 5 includes at least a first transmission shaft 59 and a second transmission shaft 58, the first transmission shaft 59 is fixedly provided with a first large transmission wheel 591 and a first small transmission wheel 592, the first large transmission wheel 591 is meshed with a first driving wheel 54 fixedly provided on the motor shaft 30 of the first motor 3; the second transmission shaft 58 is fixedly provided with a second large transmission wheel 581 and a second small transmission wheel 582, the second large transmission wheel 581 is meshed with the first small transmission wheel 592, and the second small transmission wheel 582 is meshed with a first driven wheel 55 fixedly provided on the first output shaft 1.

[0034] The second transmission assembly 6 at least includes a first gear ring 66 and a second gear ring 67 fixed on the housing, a first sun gear 661 fixed on the motor shaft 40 of the second motor 4, a first planetary carrier 662 is sleeved on the motor shaft of the second motor 4, a first planetary carrier 662 is provided with a first planetary gear 663, the first planetary gear 663 is located between the first gear ring 66 and the first sun gear 661, and meshes with both; a linkage wheel 664 is also fixed on the first planetary carrier 662, a second planetary gear 665 is provided between the linkage wheel 664 and the second gear ring 67, meshing with both, a second planetary carrier 666 is provided on the second planetary gear 665, and the second planetary carrier 666 is fixed on the second output shaft 2. Of course, other single-row planetary gear structures and double-row planetary gear structures are applicable to the present invention, and will not be described in detail here.

[0035] The working process of the third embodiment is briefly described below: the first motor 3 is started to drive the first driving wheel 54 to rotate, the first driving wheel 54 rotates to drive the first large transmission wheel 591 meshed with it to rotate, the first large transmission wheel 591 rotates to drive the first small transmission wheel 592 to rotate through the first transmission shaft 59, the first small transmission wheel 592 rotates to drive the second large transmission wheel 581 meshed with it to rotate, the second large transmission wheel 581 rotates to drive the second small transmission wheel 582 to rotate through the second transmission shaft 58, and the second small transmission wheel 582 rotates to drive the first driven wheel 55 and the first output shaft 1 to rotate synchronously. At the same time, the second motor 4 is started, and drives the first planet carrier 662 to rotate through the first sun gear 661 and the first planet gear 663 in turn, and the first planet carrier 662 rotates to drive the second planet carrier 666 and the second output shaft 2 fixed thereon to rotate synchronously through the linkage wheel 664 and the second planet gear 665.

[0036] Compared with the second embodiment, the first transmission assembly of the third embodiment has a triple reduction structure through the design of double intermediate shafts, so that the upper limit of the speed ratio can be greatly improved without increasing the axial size.

[0037] like Figure 4 As shown, it is the fourth embodiment of the present invention, the first transmission assembly 5 at least includes a third ring gear 50, a third sun gear 501 is fixedly provided on the motor shaft 30 of the first motor 3, a third planetary carrier 502 is hollowly sleeved on the motor shaft 30 of the first motor 3, a third planetary gear 503 is provided on the third planetary carrier 502, the third planetary gear 503 is located between the third ring gear 50 and the third sun gear 501, and meshes with both; a driving wheel 504 is also fixedly provided on the third planetary carrier 502, and a follower wheel 505 meshing with the driving wheel 504 is fixedly provided on the first output shaft 1.

[0038] The second transmission assembly 6 at least includes a first gear ring 66 and a second gear ring 67 fixed on the housing, a first sun gear 661 fixed on the motor shaft 40 of the second motor 4, a first planetary carrier 662 is sleeved on the motor shaft of the second motor 4, a first planetary carrier 662 is provided with a first planetary gear 663, the first planetary gear 663 is located between the first gear ring 66 and the first sun gear 661, and meshes with both; a linkage wheel 664 is also fixed on the first planetary carrier 662, a second planetary gear 665 is provided between the linkage wheel 664 and the second gear ring 67, meshing with both, a second planetary carrier 666 is provided on the second planetary gear 665, and the second planetary carrier 666 is fixed on the second output shaft 2. Of course, other single-row planetary gear structures and double-row planetary gear structures are applicable to the present invention, and will not be described in detail here.

[0039] The working process of the fourth embodiment is briefly described below: the first motor 3 drives the third sun gear 501 to rotate, the third sun gear 501 drives the third planet carrier 502 to rotate through the third planet gear 503, the third planet carrier 502 rotates and drives the follower wheel 505 to rotate through the driving wheel 504, and the follower wheel 505 rotates to drive the first output shaft fixed thereon to rotate. At the same time, the second motor 4 is started, and drives the first planet carrier 662 to rotate through the first sun gear 661 and the first planet gear 663 in turn, and the first planet carrier 662 rotates and drives the second planet carrier 666 and the second output shaft 2 fixed thereon to rotate synchronously through the linkage wheel 664 and the second planet gear 665.

[0040] Compared with the third embodiment, the first transmission assembly in this embodiment adopts a planetary gear row, which can achieve lightweight, smaller size, lighter weight, and more flexible speed ratio arrangement.

[0041] like Figure 5 As shown, it is the fifth embodiment of the present invention, the first transmission assembly 5 at least includes a third ring gear 50 and a driving wheel 504, the first output shaft 1 is fixedly provided with a third sun gear 501, the first output shaft 1 is hollowly provided with a third planetary carrier 502, the third planetary carrier 502 is provided with a third planetary gear 503, the third planetary gear 503 is located between the third ring gear 50 and the third sun gear 501, and meshes with both; the third planetary carrier 502 is also fixedly provided with a follower wheel 505, the follower wheel 505 is meshed with the driving wheel 504 fixedly provided on the motor shaft 30 of the first motor 3.

[0042] The second transmission assembly 6 at least includes a first gear ring 66 and a second gear ring 67 fixed on the housing, a first sun gear 661 fixed on the motor shaft 40 of the second motor 4, a first planetary carrier 662 is sleeved on the motor shaft of the second motor 4, a first planetary carrier 662 is provided with a first planetary gear 663, the first planetary gear 663 is located between the first gear ring 66 and the first sun gear 661, and meshes with both; a linkage wheel 664 is also fixed on the first planetary carrier 662, a second planetary gear 665 is provided between the linkage wheel 664 and the second gear ring 67, meshing with both, a second planetary carrier 666 is provided on the second planetary gear 665, and the second planetary carrier 666 is fixed on the second output shaft 2. Of course, other single-row planetary gear structures and double-row planetary gear structures are applicable to the present invention, and will not be described in detail here.

[0043] The working process of the fifth embodiment is briefly described below: the first motor 3 is driven to drive the driving wheel 504 to rotate, the driving wheel 504 rotates to drive the driven wheel 505 meshed with it to rotate, the driven wheel 505 rotates to drive the third sun gear 501 to rotate through the third planetary carrier 502 and the third planetary gear 503, and the third sun gear 501 drives the first output shaft 1 fixed to it to rotate. At the same time, the second motor 4 is started, and drives the first planetary carrier 662 to rotate through the first sun gear 661 and the first planetary gear 663 in turn, and the first planetary carrier 662 rotates to drive the second planetary carrier 666 and the second output shaft 2 fixed thereon to rotate synchronously through the linkage wheel 664 and the second planetary gear 665.

[0044] Compared with the third embodiment, the first transmission assembly in this embodiment adopts a planetary gear row, which can achieve lightweight, smaller size, lighter weight, and more flexible speed ratio arrangement. Compared with the fourth embodiment, this embodiment provides another layout mode and increases applicability.

[0045] It should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. For example, the transmission components in each embodiment can be interchangeable, or the radial motor positions can be interchanged, or other transmission components can be used.

[0046] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-motor electric drive axle, comprising a first motor (3) and a second motor (4), a first output shaft (1) and a second output shaft (2) arranged coaxially, wherein the outer sides of the first output shaft (1) and the second output shaft (2) are both connected to a wheel hub; characterized in that: The first motor (3) and the second motor (4) are arranged radially; the motor shaft (30) of the first motor (3) is transmission-connected to the first output shaft (1) via a first transmission assembly (5); the motor shaft (40) of the second motor (4) is transmission-connected to the second output shaft (2) via a second transmission assembly (6); in axial position, the first motor (3) and the second motor (4) are both located between the first transmission assembly (5) and the second transmission assembly (6); in radial position, the radial dimensions of the first motor (3) and the second motor (4) are not greater than the radial dimensions of the first transmission assembly (5) or the second transmission assembly (6).

2. The dual-motor electric drive axle according to claim 1, characterized in that: The first motor (3) and the second motor (4) share a motor housing.

3. The dual-motor electric drive axle according to claim 1, characterized in that: The first motor (3) and the second motor (4) are arranged in close proximity.

4. The dual-motor electric drive axle according to any one of claims 1 to 3, characterized in that: The first transmission assembly (5) comprises a first transmission shaft (51), on which a first large reduction wheel (52) and a first small reduction wheel (53) are fixedly arranged, the first large reduction wheel (52) meshing with a first driving wheel (54) fixedly arranged on a motor shaft (30) of the first motor (3); and the first small reduction wheel (53) meshing with a first driven wheel (55) fixedly arranged on the first output shaft (1).

5. The dual-motor electric drive axle according to any one of claims 1 to 3, characterized in that: The second transmission assembly (6) comprises a second transmission shaft (61), a second driving wheel (62) is fixedly provided on the motor shaft (40) of the second motor (4), a second driven wheel (63) is fixedly provided on the second output shaft (2), a second large reduction wheel (64) and a second small reduction wheel (65) are fixedly provided on the second transmission shaft (61), the second small reduction wheel (65) meshes with the second driven wheel (63), and the second large reduction wheel (64) meshes with the second driving wheel (62).

6. The dual-motor electric drive axle according to claim 5, characterized in that: The motor shaft (40) of the second motor (4) is coaxially arranged with the second output shaft (2).

7. The dual-motor electric drive axle according to any one of claims 1 to 3, characterized in that: The second transmission assembly (6) comprises at least a first gear ring (66) and a second gear ring (67); a first sun gear (661) is fixedly provided on the motor shaft (40) of the second motor (4); a first planet carrier (662) is loosely sleeved on the motor shaft of the second motor (4); a first planetary gear (663) is provided on the first planetary carrier (662); the first planetary gear (663) is located between the first gear ring (66) and the first sun gear (661) and meshes with both; a linkage wheel (664) is also fixedly provided on the first planetary carrier (662); a second planetary gear (665) is provided between the linkage wheel (664) and the second gear ring (67) and meshes with both; a second planetary gear (666) is provided on the second planetary gear (665); and the second planetary carrier (666) is fixedly provided on the second output shaft (2).

8. The dual-motor electric drive axle according to any one of claims 1 to 3, characterized in that: The first transmission assembly (5) comprises at least a first transmission shaft (59) and a second transmission shaft (58); a first large transmission wheel (591) and a first small transmission wheel (592) are fixedly provided on the first transmission shaft (59); the first large transmission wheel (591) meshes with a first driving wheel (54) fixedly provided on a motor shaft (30) of the first motor (3); and a second large transmission wheel (581) and a second small transmission wheel (582) are fixedly provided on the second transmission shaft (58); the second large transmission wheel (581) meshes with the first small transmission wheel (592); and the second small transmission wheel (582) meshes with a first driven wheel (55) fixedly provided on the first output shaft (1).

9. The dual-motor electric drive axle according to any one of claims 1 to 3, characterized in that: The first transmission assembly (5) comprises at least a third gear ring (50); a third sun gear (501) is fixedly provided on the motor shaft (30) of the first motor (3); a third planet carrier (502) is hollowly sleeved on the motor shaft (30) of the first motor (3); a third planet gear (503) is provided on the third planet carrier (502); the third planet gear (503) is located between the third gear ring (50) and the third sun gear (501) and meshes with both; a driving wheel (504) is also fixedly provided on the third planet carrier (502); and a follower wheel (505) meshing with the driving wheel (504) is fixedly provided on the first output shaft (1).

10. The dual-motor electric drive axle according to any one of claims 1 to 3, characterized in that: The first transmission assembly (5) comprises at least a third gear ring (50) and a driving wheel (504); a third sun gear (501) is fixedly provided on the first output shaft (1); a third planet carrier (502) is hollowly sleeved on the first output shaft (1); a third planetary gear (503) is provided on the third planet carrier (502); the third planetary gear (503) is located between the third gear ring (50) and the third sun gear (501) and meshes with both; a follower wheel (505) is also fixedly provided on the third planet carrier (502); the follower wheel (505) meshes with the driving wheel (504) fixedly provided on the motor shaft (30) of the first motor (3).

Images