A dual motor drive axle and vehicle

Abstract

The application discloses a double-motor driving axle, which comprises a first motor and a second motor for providing power for a first inner gear ring, the first inner gear ring is connected with a plurality of output gears and a second inner gear ring through a transmission structure, and a main transmission shaft is selectively connected with one of the plurality of output gears or the inner gear ring through a sliding sleeve group. In addition, the application further discloses a vehicle applying the double-motor driving axle. The double-motor driving axle adopts the cooperation of the inner gear ring and the outer gear, four gears can be realized by only three rows of gears, the axial dimension of the driving axle is effectively reduced, the double-intermediate-shaft structure design is adopted, the size of the gear can be reduced, the symmetrical arrangement is beneficial to prolonging the service life of the driving axle, meanwhile, the high-efficiency interval of the motor can be better utilized, and the transmission efficiency of the double-motor driving axle is improved.

Description

Technical Field

[0001] This invention relates to the technical field of vehicle manufacturing, and more specifically, to a dual-motor drive axle and a vehicle having the dual-motor drive axle. Background Technology

[0002] With the continuous development of the new energy market, the drive system of new energy vehicles is gradually developing towards integration and high integration. In the field of commercial vehicles, the integration of drive motor and drive axle is gradually becoming a development trend.

[0003] Existing technologies employ dual-motor or multi-motor drive schemes. For example, one type of dual-motor drive axle assembly includes: two motors and two corresponding input shafts. The input shafts are connected to a shifter and multiple output gears, and an output shaft is provided with output gears and driven gears for meshing with the output gears. Furthermore, this dual-motor drive axle assembly also includes an offset gear set of planetary gears offset relative to the half-shafts of the drive axle. In fatigue testing, this offset gear set is prone to fatigue problems, thus affecting the service life of the drive axle assembly.

[0004] This dual-motor drive axle uses four or five rows of gears to achieve four-speed shifting, requiring a large axial space and therefore is not structurally compact enough. Furthermore, functionally, this dual-motor drive axle assembly is merely a simple power-split single-stage reducer with low transmission efficiency, and requires further improvement. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing dual-motor drive axles, such as insufficient mechanical compactness, low transmission efficiency, and reduced service life due to offset structures. This invention provides a dual-motor drive axle with symmetrically arranged dual motors, using an internal gear ring and external gear in combination. Four gear positions can be achieved with only three rows of gears, effectively reducing the axial dimension and making better use of the high-efficiency range of the motors, thereby improving the transmission efficiency of this dual-motor drive axle.

[0006] To address the aforementioned technical problems, the present invention provides a dual-motor drive bridge, comprising:

[0007] A first motor and a second motor are symmetrically arranged along the axial direction of the main drive shaft. The first motor and the second motor are both power sources for the first output gear and the first internal gear ring. The first internal gear ring is sequentially connected to a transmission gear set and a second internal gear ring. The transmission gear set is also connected to a second output gear. The first output gear and the second output gear are both mounted on the main drive shaft. The main drive shaft can be selectively connected to one of the first output gear, the second output gear, the first internal gear ring, and the second internal gear ring through a shifting mechanism to adjust the output transmission ratio of the main drive shaft.

[0008] Furthermore, the shifting mechanism is a sliding sleeve assembly connected to the main drive shaft. The sliding sleeve assembly includes a first sliding sleeve, a second sliding sleeve, and a third sliding sleeve. The first sliding sleeve can be selectively connected to the first output gear, the second sliding sleeve can be selectively connected to the first internal gear ring or the second output gear, and the third sliding sleeve can be selectively connected to the second internal gear ring. By manually or automatically controlling the position of the sliding sleeve assembly, the first, second, or third sliding sleeve can be connected to one of the output gears or one of the internal gear rings to achieve the shifting function.

[0009] Furthermore, the transmission gear set includes an eleventh gear, a fifth gear, a seventh gear, and a ninth gear connected in sequence. The eleventh gear is connected to the first internal gear ring, the fifth gear and the seventh gear are coaxially connected through the first transmission shaft, the ninth gear is connected to the second internal gear ring, and the seventh gear is connected to the second output gear.

[0010] Furthermore, the transmission gear set also includes a sixth gear, an eighth gear, and a tenth gear connected in sequence, wherein the sixth gear is connected to the eleventh gear, the sixth gear and the eighth gear are coaxially connected through the second transmission shaft, the tenth gear is connected to the second internal gear ring, the eighth gear is connected to the second output gear, and the sixth gear, the eighth gear, and the tenth gear are symmetrically arranged with the fifth gear, the seventh gear, and the ninth gear along the axial direction of the main transmission shaft.

[0011] Furthermore, the first motor is connected to a first input shaft as its power output structure, and a first gear is provided on the first input shaft. The first gear is connected to both the first output gear and the first inner ring gear. In addition, a third gear is also included, which meshes with both the first gear and the first output gear.

[0012] Furthermore, the third gear is loosely fitted onto the third shaft, which is fixedly installed.

[0013] Furthermore, the second motor is connected to a second input shaft as its power output structure. A second gear is mounted on the second input shaft, and this second gear is simultaneously connected to the first output gear and the first internal gear ring. In addition, a fourth gear is included, which meshes with both the second gear and the first output gear. The second gear and the fourth gear are symmetrically arranged with respect to the first gear and the third gear along the axial direction of the main drive shaft, respectively.

[0014] Furthermore, the fourth gear is loosely fitted onto the fourth shaft, which is fixedly installed.

[0015] Furthermore, the main drive shaft is connected to a differential, which is connected to the first half-shaft and the second half-shaft respectively. The first half-shaft and the second half-shaft are connected to the first sun gear and the second sun gear respectively. The dual-motor drive axle also includes planetary gears, a third internal gear ring, and a planet carrier. The planetary gears mesh with the first sun gear or the second sun gear, and the planetary gears are also connected to the third internal gear ring, which is fixedly installed. The planetary gears are connected to the planet carrier.

[0016] On the other hand, the present invention also provides a vehicle that utilizes the aforementioned dual-motor drive axle structure.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention uses an internal gear ring and an external gear in combination, and can achieve 4 gears with only 3 rows of gears, which effectively reduces the axial dimension of the drive axle. In addition, the double intermediate shaft structure design can reduce the size of the gears and make the structure more compact. At the same time, compared with the planetary structure commonly used in the field, this invention does not use a planet carrier (excluding wheel-side structure) in the main transmission structure, which can reduce the weight of the transmission structure.

[0019] 2. This invention employs dual motors for simultaneous drive. The symmetrical arrangement of the dual motors helps extend the service life of the drive axle. Furthermore, due to the increased number of motors, passenger car-sized motors can be applied to commercial vehicles, significantly reducing the cost, weight, and output power of a single motor. On the other hand, the application of dual motors can also better utilize the high-efficiency range of the motors to improve the transmission efficiency of the dual-motor drive axle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the dual-motor drive axle.

[0021] Figure 2 This is a reference diagram of the power transmission path for a dual-motor drive axle in first gear.

[0022] Figure 3 This is a reference diagram of the power transmission path for the dual-motor drive axle in second gear;

[0023] Figure 4 This is a reference diagram of the power transmission path for a dual-motor drive axle in third gear.

[0024] Figure 5 This is a reference diagram of the power transmission path for a dual-motor drive axle in fourth gear.

[0025] In the attached image:

[0026] 1-First motor; 2-Second motor; 3-First internal gear ring; 4-Second internal gear ring; 5-Main drive shaft; 7-Differential gear;

[0027] 101 - First input axis; 102 - Second input axis;

[0028] 301 - First gear; 302 - Second gear; 303 - Third gear; 304 - Fourth gear; 305 - Fifth gear; 306 - Sixth gear; 307 - Seventh gear; 308 - Eighth gear; 309 - Ninth gear; 310 - Tenth gear; 311 - Eleventh gear;

[0029] 401 - First output gear; 402 - Second output gear;

[0030] 501 - First drive shaft; 502 - Second drive shaft; 503 - Third shaft; 504 - Fourth shaft;

[0031] 601 - First sliding sleeve; 602 - Second sliding sleeve; 603 - Third sliding sleeve;

[0032] 801 - First half-shaft; 802 - Second half-shaft;

[0033] 901 - First sun gear; 902 - Second sun gear; 903 - Planet gear; 904 - Third internal gear ring; 905 - Planet carrier. Detailed Implementation

[0034] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that terms such as "front," "rear," "left," and "right," indicating orientation or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. Furthermore, descriptions involving "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0036] Example 1

[0037] See Figure 1 This embodiment provides a dual-motor drive axle, including a first motor 1 and a second motor 2. The output shaft of the first motor 1 is a first input shaft 101, and the output shaft of the second motor 2 is a second input shaft 102. The first input shaft 101 and the second input shaft 102 respectively transmit the power of the first motor 1 and the second motor 2 to a gear transmission structure. The gear transmission structure includes a first gear 301 sleeved on the first input shaft 101 and a second gear 302 sleeved on the second input shaft 102. The first gear 301 and the second gear 302 are simultaneously connected to a first output gear 401 and a first internal gear ring 3. Specifically, one side of the first gear 301 is indirectly connected to the first output gear 401 to adjust the rotation direction of the first output gear 401; the other side meshes with the internal teeth of the first internal gear ring 3. The second gear 302 is configured in the same way as the first gear 301.

[0038] The gear transmission structure further includes a transmission gear set and a second internal gear ring 4 connected in sequence to the first internal gear ring 3. The transmission gear set is also connected to a second output gear 402. The transmission gear set includes an eleventh gear 311, a fifth gear 305, a seventh gear 307, and a ninth gear 309 connected in sequence. The eleventh gear 311 is connected to the first internal gear ring 3, the seventh gear 307 and the fifth gear 305 are coaxially connected via a first transmission shaft 501, and the ninth gear 309 meshes with the second internal gear ring 4.

[0039] The transmission gear set also includes a sixth gear 306, an eighth gear 308, and a tenth gear 310 connected in sequence. The sixth gear 306 is connected to the eleventh gear 311, the eighth gear 308 is coaxially connected to the sixth gear 306 through the second transmission shaft 502, and the tenth gear 310 meshes with the second internal gear ring 4.

[0040] The first output gear 401, the second output gear 402, the first internal gear ring 3, and the second internal gear ring 4 are all mounted on the main drive shaft 5. The main drive shaft 5 can be selectively connected to one of the first output gear 401, the second output gear 402, the first internal gear ring 3, or the second internal gear ring 4 via a sliding sleeve assembly, thereby realizing the gear shifting function. Meanwhile, to maintain the symmetry and force balance of the overall structure and reduce the vibration amplitude of the drive axle, the sixth gear 306, the eighth gear 308, the tenth gear 310, the fifth gear 305, the seventh gear 307, and the ninth gear 309 are symmetrically arranged along the axial direction of the main drive shaft 5.

[0041] Similarly, the first motor 1 and the second motor 2 are also symmetrically arranged along the axial direction of the main drive shaft 5, so that the entire dual-motor drive axle maintains a symmetrical structure, which helps to solve the fatigue life problem caused by the drive axle offset problem in the prior art.

[0042] In this embodiment, the sliding sleeve assembly includes a first sliding sleeve 601, a second sliding sleeve 602, and a third sliding sleeve 603. The first sliding sleeve 601 is disposed near the first output gear 401 and can be selectively connected to the first output gear 401 to transmit power from the first motor 1 and the second motor 2 to the main drive shaft 5. The second sliding sleeve 602 is disposed between the first internal gear ring 3 and the second output gear 402 and can be selectively connected to either the first internal gear ring 3 or the second output gear 402 (corresponding to two different gear positions), or it can remain unconnected to either the first internal gear ring 3 or the second output gear 402 (corresponding to other gear positions). The third sliding sleeve 603 is disposed near the second internal gear ring 4 and can be selectively connected to the second internal gear ring 4.

[0043] The main drive shaft 5 is connected to a differential 7. The opposite sides of the differential 7 are connected to a first half-shaft 801 and a second half-shaft 802, respectively. The first half-shaft 801 and the second half-shaft 802 are connected to a first sun gear 901 and a second sun gear 902, respectively. The first sun gear 901 and the second sun gear 902 are used to transmit power to the wheel structure of the vehicle. Furthermore, the dual-motor drive axle includes two sets of independent planetary gears 903, a third internal gear ring 904, and a planet carrier 905. One set of planetary gears 903 meshes with the first sun gear 901 and is connected to the third internal gear ring 904 and the planet carrier 905 on the same side as the first sun gear 901. The other set of planetary gears 903 meshes with the second sun gear 902 and is connected to the third internal gear ring 904 located on the same side as the second sun gear 902. The third internal gear ring 904 is fixedly installed. Additionally, the planet carrier 904 is connected to the planetary gears 903.

[0044] like Figure 2As shown, when the dual-motor drive bridge is set to first gear, the first sliding sleeve 601 and the second sliding sleeve 602 do not mesh with any output gear or internal gear ring, thus disconnecting the connection. Only the third sliding sleeve 603 meshes with the second internal gear ring 4, forming a connection. At this time, the first gear 301, sleeved on the first input shaft 101, rotates under the drive of the first motor 1, driving the first internal gear ring 3 meshing with it to rotate. Simultaneously, the second gear 302, set on the second input shaft 102, also rotates under the drive of the second motor 2, synchronously driving the first internal gear ring 3 to rotate. While the first internal gear ring 3 rotates, the eleventh gear 311 also rotates synchronously. The eleventh gear 311 meshes with the fifth gear 305 and the sixth gear 306, enabling the fifth gear 305 and the sixth gear 306 to also rotate synchronously. Since the seventh gear 307 and the fifth gear 305 are coaxially connected through the first transmission shaft 501, the seventh gear 307 and the fifth gear 305 rotate synchronously, thereby driving the ninth gear 309 to rotate. The ninth gear 309 meshes with the second internal gear ring 4, and the second internal gear ring 4 is connected to the third sliding sleeve 603. Through the above transmission structure, the second internal gear ring 4 is finally driven by the first motor 1 to rotate, and the power is transmitted to the main transmission shaft 5 through the third sliding sleeve 603.

[0045] Similarly, the power of the second motor 2 is transmitted sequentially through the second input shaft 102, the second gear 302, the first internal gear ring 3, the eleventh gear 311, the sixth gear 306, the second transmission shaft 502, the eighth gear 308, the tenth gear 310, the second internal gear ring 4, and the third sliding sleeve 603, and finally to the main transmission shaft 5.

[0046] After being driven, the main drive shaft 5 transmits power to the first half-shaft 801 and the second half-shaft 802 through the differential 7. The connection structure between the differential 7 and the main drive shaft 5, the first half-shaft 801, and the second half-shaft 802 is in accordance with existing technology. The first half-shaft 801 is connected to the first sun gear 901. Specifically, the first sun gear 901 is sleeved on the first half-shaft 801 and rotates synchronously with it. The first sun gear 901 meshes with planet gears 903, and the planet gears 903 simultaneously mesh with the third internal gear ring 904. The number of planet gears 903 is at least three, and each planet gear 903 is connected to its adjacent planet gear 903 through a planet carrier 905. In this embodiment, the third internal gear ring 904 is fixed, the first sun gear 901 is the driving member, and the planet gears 903 are the driven members. The second half-shaft 802 is connected to the second sun gear 902, so that the second sun gear 902 rotates synchronously with the second half-shaft 802. The second sun gear 902 is equipped with another set of planet gears 903, a third internal gear ring 904, and a planet carrier 905. The third internal gear ring 904 is fixedly installed, and the planet gears 903 mesh with both the second sun gear 902 and the third internal gear ring 904. Similarly, each planet gear 903 is connected to its adjacent planet gear 903 via the planet carrier 905.

[0047] Example 2

[0048] See Figure 3 Based on Embodiment 1, when the dual-motor drive bridge is set to the second gear, the third sliding sleeve 603 disconnects from the second internal gear ring 4, and at the same time, the second sliding sleeve 602 moves toward the second output gear 402 and connects with the second output gear 402.

[0049] At this time, the power output of the first motor 1 and the second motor 2 is output to the seventh gear 307 and the eighth gear 308 respectively through the transmission path described in Embodiment 1, and then transmitted to the second output gear 402 that meshes with the seventh gear 307 and the eighth gear 308. After receiving the power input from the first motor 1 and the second motor 2, the second output gear 402 transmits the power to the main drive shaft 5 through the second sliding sleeve 602. After being driven, the main drive shaft 5 transmits the power to the wheel-side structure, namely the first sun gear 901 and the second sun gear 902, according to the transmission path or transmission method described in Embodiment 1.

[0050] Example 3

[0051] like Figure 4 As shown, based on Embodiment 1, when the dual-motor drive bridge is set to three gears, the third sliding sleeve 603 disconnects from the second internal gear ring 4, and at the same time, the second sliding sleeve 602 moves toward the first internal gear ring 3 and connects with the first internal gear ring 3.

[0052] At this time, the power output of the first motor 1 and the second motor 2 is output to the first internal gear ring 3 via the transmission path described in Embodiment 1. After receiving the power input from the first motor 1 and the second motor 2, the first internal gear ring 3 transmits the power to the main drive shaft 5 via the second sliding sleeve 602. After being driven, the main drive shaft 5 transmits the power to the wheel-side structure, namely the first sun gear 901 and the second sun gear 902, according to the transmission path or transmission method described in Embodiment 1.

[0053] Example 4

[0054] This embodiment further defines the features based on Embodiment 1. See also... Figure 5 In this embodiment, a third gear 303 and a fourth gear 304 are also provided. The third gear 303 meshes with both the first gear 301 and the first output gear 401, serving as a transmission connection structure between the first gear 301 and the first output gear 401. The fourth gear 304 meshes with both the second gear 302 and the first output gear 401.

[0055] The third gear 303 is loosely fitted onto the third shaft 503, which is fixedly installed.

[0056] Similarly, the fourth gear 304 is loosely fitted on the fourth shaft 504, which is fixedly installed.

[0057] When the dual-motor drive axle is set to fourth gear, both the third sliding sleeve 603 and the second sliding sleeve 602 are disconnected from the output gear or internal gear ring, while the first sliding sleeve 601 meshes with the first output gear 401. Of course, in other embodiments, the first sliding sleeve 601 can also form other connection relationships with the first output gear 401. The power of the first motor 1 is transmitted sequentially through the first input shaft 101, the first gear 301, and the third gear 303 to the first output gear 401, and then through the first sliding sleeve 601 to the main drive shaft 5. Similarly, the power of the second motor 2 is transmitted sequentially through the second input shaft 102, the second gear 302, and the fourth gear 304 to the first output gear 401, and then through the first sliding sleeve 601 to the main drive shaft 5.

[0058] After the main drive shaft 5 is driven, it transmits power to the wheel-side structure, namely the first sun gear 901 and the second sun gear 902, according to the transmission path or transmission method described in Embodiment 1.

[0059] Example 5

[0060] This embodiment also proposes a vehicle equipped with a dual-motor drive axle as described in Embodiment 4. When driving, the driver controls one of the first sliding sleeve 601, the second sliding sleeve 602, and the third sliding sleeve 603 via a control system to mesh with one of the first output gear 401, the second output gear 402, the first internal gear ring 3, and the second internal gear ring 4, thereby achieving four-speed shifting. Since the dual-motor drive axle can achieve four speeds using only three rows of gears, the axial dimension of the dual-motor drive axle is effectively reduced. Furthermore, the dual intermediate shaft structure design reduces the size of the gears, thus providing more interior space for the vehicle. For example, most intuitively, a larger battery can be placed inside the vehicle, thereby increasing the vehicle's driving range.

[0061] Since the dual-motor drive axle uses two motors to drive simultaneously, it helps to reduce the cost, weight and output power of a single motor. On the other hand, it can better utilize the high-efficiency range of the motors to improve the transmission efficiency of the dual-motor drive axle and reduce the energy consumption of the vehicle.

[0062] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dual-motor drive bridge, characterized in that, It includes a first motor (1), a second motor (2), a first output gear (401), and a first internal gear ring (3). The first motor (1) and the second motor (2) serve as the power source for the first output gear (401) and the first internal gear ring (3). The first internal gear ring (3) is connected in sequence to a transmission gear set and a second internal gear ring (4). The transmission gear set is also connected to a second output gear (402). The first output gear (401) and the second output gear (402) are mounted on a main drive shaft (5). The main drive shaft (5) is connected to one of the first output gear (401), the second output gear (402), the first internal gear ring (3), and the second internal gear ring (4) through a shifting mechanism. The transmission gear set includes an eleventh gear (311), a fifth gear (305), a seventh gear (307), and a ninth gear (309) connected in sequence. The eleventh gear (311) is connected to the first internal gear ring (3). The seventh gear (307) and the fifth gear (305) are coaxially connected through the first transmission shaft (501). The ninth gear (309) is connected to the second internal gear ring (4). The seventh gear (307) is connected to the second output gear (402).

2. The dual-motor drive axle according to claim 1, characterized in that, The shifting mechanism is connected to the main drive shaft (5). The shifting mechanism includes a first sliding sleeve (601), a second sliding sleeve (602), and a third sliding sleeve (603). The first sliding sleeve (601) is connected to the first output gear (401), the second sliding sleeve (602) is connected to the first internal gear ring (3) or the second output gear (402), and the third sliding sleeve (603) is connected to the second internal gear ring (4).

3. The dual-motor drive axle according to claim 1, characterized in that, The transmission gear set also includes a sixth gear (306), an eighth gear (308), and a tenth gear (310) connected in sequence. The sixth gear (306) is connected to the eleventh gear (311), the eighth gear (308) is coaxially connected to the sixth gear (306) through the second transmission shaft (502), and the tenth gear (310) is connected to the second internal gear ring (4). The eighth gear (308) is connected to the second output gear (402). The sixth gear (306), the eighth gear (308), the tenth gear (310), the fifth gear (305), the seventh gear (307), and the ninth gear (309) are symmetrically arranged along the axial direction of the main transmission shaft (5).

4. The dual-motor drive axle according to claim 1, characterized in that, It also includes a first gear (301) and a third gear (303), the first gear (301) being mounted on the drive shaft of the first motor (1), and the third gear (303) meshing with both the first gear (301) and the first output gear (401).

5. The dual-motor drive axle according to claim 4, characterized in that, The third gear (303) is loosely fitted onto the third shaft (503), which is fixedly installed.

6. The dual-motor drive bridge according to claim 1, characterized in that, It also includes a second gear (302) and a fourth gear (304), the second gear (302) being mounted on the drive shaft of the second motor (2), and the fourth gear (304) meshing with both the second gear (302) and the first output gear (401).

7. The dual-motor drive axle according to claim 6, characterized in that, The fourth gear (304) is loosely fitted onto the fourth shaft (504), which is fixedly installed.

8. The dual-motor drive axle according to any one of claims 1-7, characterized in that, The main drive shaft (5) is connected to a differential (7), which is connected to the first half-shaft (801) and the second half-shaft (802) respectively. The first half-shaft (801) and the second half-shaft (802) are connected to the first sun gear (901) and the second sun gear (902) respectively. It also includes a planet gear (903), a third internal gear ring (904) and a planet carrier (905). The planet gear (903) meshes with the first sun gear (901) or the second sun gear (902). The planet gear (903) is also connected to the third internal gear ring (904). The third internal gear ring (904) is fixedly installed. The planet gear (903) is connected to the planet carrier (905).

9. A vehicle, characterized in that, Includes the dual-motor drive axle as described in any one of claims 1-8.

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