Coaxial double-motor electric drive axle assembly with wheel side reducer

Abstract

This application relates to a coaxial dual-motor electric drive axle assembly with wheel-side reducers, comprising: a housing, an A-side two-speed drive motor assembly, a B-side single-speed drive motor assembly, an A-side two-speed power unit, a B-side single-speed power assembly, a differential, an A-side wheel-side reduction assembly, and a B-side wheel-side reduction assembly; the output end of the B-side single-speed drive motor assembly is coaxially mounted within the housing with the output end of the A-side two-speed drive motor assembly; the input end of the A-side two-speed power unit is connected to the output end of the A-side two-speed drive motor assembly; the input end of the B-side single-speed power assembly is connected to the output end of the B-side single-speed drive motor assembly; the input end of the differential is connected to both the output ends of the A-side two-speed power unit and the B-side single-speed power assembly; the input ends of both the A-side and B-side wheel-side reduction assemblies are connected to the output ends of the differential, and the output ends of both the A-side and B-side wheel-side reduction assemblies are connected to the wheel ends.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a coaxial dual-motor electric drive axle assembly with wheel-side reducers. Background Technology

[0002] To meet the high torque requirements of vehicles, more and more vehicles are now adopting dual-motor drive systems, which couple two power sources together through a mechanical structure to output power to the wheels. However, it is still difficult to fully utilize the torque control characteristics of motors and achieve the ideal state of two motors working together to ensure efficient and full operation. Summary of the Invention

[0003] Therefore, it is necessary to provide a coaxial dual-motor electric drive bridge assembly with a wheel-side reducer to address the ideal situation of ensuring efficient and full operation of the motor.

[0004] One aspect of this application provides a coaxial dual-motor electric drive bridge assembly with a wheel-side reducer, comprising:

[0005] The two-speed drive motor assembly on side A is installed inside the housing;

[0006] A single-speed drive motor assembly on side B is installed inside the housing; the output end of the single-speed drive motor assembly on side B is coaxially arranged with the output end of the two-speed drive motor assembly on side A.

[0007] The input end of the two-speed power unit on side A is coaxially connected to the output end of the two-speed drive motor assembly on side A.

[0008] The input end of the single-speed power assembly on side B is coaxially connected to the output end of the single-speed drive motor assembly on side B.

[0009] The differential is connected to the output of the two-speed power unit on side A and the output of the single-speed power assembly on side B.

[0010] A-side wheel-end reduction assembly, wherein the input end of the A-side wheel-end reduction assembly is connected to the output end of the differential, and the output end of the A-side wheel-end reduction assembly is connected to the wheel end; and

[0011] The input end of the B-side wheel-side reduction assembly is connected to the output end of the differential, and the output end of the B-side wheel-side reduction assembly is connected to the wheel end.

[0012] In one embodiment, the two-speed power unit on side A includes:

[0013] The input terminal of the first planetary gear set on side A is connected to the output terminal of the second-speed drive motor assembly on side A.

[0014] The second planetary gear set on side A, with its input terminal connected to the output terminal of the first planetary gear set on side A, is further described as follows:

[0015] The shift assembly is connected to the sun gear of the second planetary gear set assembly on side A and the planet carrier of the second planetary gear set assembly on side A.

[0016] In one embodiment, the A-side two-gear first planetary gear assembly includes:

[0017] The first planetary gear ring on side A is installed inside the housing;

[0018] The sun gear of the first planetary gear set on side A is sleeved and connected to the output end of the drive motor assembly on side A.

[0019] The two-speed first planetary gear set on side A is meshed between the sun gear and the ring gear of the two-speed first planetary gear set on side A; and

[0020] The planetary gears of the first planetary gear set on the second gear side A are mounted on the planet shafts on one side of the planetary gear set on the second gear side A.

[0021] In one embodiment, the A-side two-gear second planetary gear assembly includes:

[0022] The second planetary gear ring of the two gears on side A is connected to the other side of the planet carrier of the first planetary gear of the two gears on side A.

[0023] The second planetary gear sun gear on side A is hollowly connected to the input end of the wheel-side reduction assembly on side A.

[0024] The second planetary gears of the second planetary set on side A are meshed between the sun gear of the second planetary set on side A and the ring gear of the second planetary set on side A.

[0025] The second planetary gear carrier of the second planetary gear set on side A is mounted on the planet shaft of the second planetary gear carrier on side A, and the second planetary gear carrier of the second planetary gear set on side A is connected to the input end of the differential.

[0026] In one embodiment, the shifting assembly includes:

[0027] A shift sleeve, wherein the shift sleeve is provided with an internal spline on a long section, an external spline on a long section, and an internal spline on a short section along the axial direction.

[0028] The external spline of the second planetary gear set of the two gears is connected to the internal spline of the long section of the shift sleeve;

[0029] A fixed internal spline is connected to the external spline of the shift sleeve; and

[0030] The second planetary gear carrier of the two gears is connected by an external spline, which is connected to the internal spline of the short section of the shift sleeve.

[0031] In one embodiment, the A-side wheel-side reduction assembly includes:

[0032] The input end of the A-side half-shaft is coaxially connected to the output end of the differential;

[0033] The sun gear of the planetary reduction mechanism on side A is sleeved and connected to the output end of the half-shaft on side A.

[0034] A side wheel planetary reduction gear ring is installed inside the housing;

[0035] The planetary gear of the planetary reduction mechanism on side A is meshed between the sun gear and the ring gear of the planetary reduction mechanism on side A; and

[0036] The planetary carrier of the planetary reduction mechanism on the A-side wheel edge has planetary gears mounted on the planetary shafts of the planetary carrier; the planetary carrier of the A-side wheel edge is connected to the wheel end.

[0037] In one embodiment, the A-side two-speed drive motor assembly includes:

[0038] The motor shaft on side A is coaxially connected to the motor rotor on side A, and the motor shaft on side A is connected to the input end of the two-speed power unit on side A; and

[0039] The stator of the motor on side A is sleeved on the rotor of the motor on side A, and the stator of the motor on side A is installed inside the housing.

[0040] In one embodiment, the B-side single-gear power assembly includes:

[0041] The B-side single-gear planetary gear sun gear is sleeved and connected to the output end of the B-side single-gear drive motor assembly;

[0042] A single-stop planetary gear ring on side B is installed inside the housing;

[0043] The B-side single-gear planetary gear is meshed between the B-side single-gear planetary gear sun gear and the B-side single-gear planetary gear ring gear; and

[0044] The B-side single-gear planetary gear set planetary carrier has planetary gears mounted on planetary shafts on the B-side single-gear planetary gear set planetary carrier, and the B-side single-gear planetary gear set planetary carrier is connected to the input end of the differential.

[0045] In one embodiment, the B-side wheel-side reduction assembly includes:

[0046] The input end of the B-side half-shaft is coaxially connected to the output end of the differential.

[0047] The sun gear of the planetary reduction mechanism on side B is sleeved and connected to the output end of the half-shaft on side B.

[0048] The B-side planetary reduction gear ring is installed inside the housing;

[0049] The planetary gear of the B-side planetary reduction mechanism is meshed between the sun gear and the ring gear of the B-side planetary reduction mechanism; and

[0050] The planetary carrier of the B-side wheel-side planetary reduction mechanism has planetary gears mounted on the planetary shafts of the B-side wheel-side planetary reduction mechanism planetary carrier; the B-side wheel-side planetary reduction mechanism planetary carrier is connected to the wheel end.

[0051] In one embodiment, the B-side single-speed drive motor assembly includes:

[0052] The B-side motor shaft is coaxially connected to the B-side motor rotor and is also connected to the input end of the B-side single-speed power assembly; and

[0053] The B-side motor stator is sleeved on the B-side motor rotor, and the B-side motor stator is installed inside the housing.

[0054] This application adopts a dual-motor drive with two gears, which meets the vehicle's requirements for the coaxial dual-motor electric drive axle assembly with wheel-side reducers under high-speed and high-torque conditions.

[0055] In this application, the two-speed power unit on side A provides a reduction mechanism with different speed ratios through dual-speed switching, which fully utilizes the motor's torque control capability and enables the motor to operate fully in the high-efficiency range.

[0056] This application adopts a planetary gear reducer coaxial arrangement, which makes the coaxial dual-motor electric drive bridge assembly with wheel-side reducer small in size and compact in structure, with more reasonable mass distribution, no cantilever structure, and improves the stress and vibration of the assembly structure. Attached Figure Description

[0057] Figure 1A schematic diagram of the structure of a coaxial dual-motor electric drive bridge assembly with a wheel-side reducer provided in one embodiment of this application is shown.

[0058] Figure 2 It shows Figure 1 A schematic diagram of the structure of the second planetary gear sun wheel on side A.

[0059] Figure 3 It shows Figure 1 A schematic diagram of the structure of the second planetary carrier on the A-side.

[0060] Figure 4 A schematic diagram of the shifting component structure of a coaxial dual-motor electric drive bridge assembly with wheel-side reducers provided in one embodiment of this application is shown.

[0061] Icon labels:

[0062] 1-A-side motor stator; 2-A-side motor rotor; 3-Shift sleeve; 4-A-side wheel-side planetary reduction mechanism ring gear; 5-A-side wheel-side planetary reduction mechanism planetary gear; 6-A-side wheel-side planetary reduction mechanism planetary carrier; 7-A-side wheel-side planetary reduction mechanism sun gear; 8-A-side half shaft; 9-Differential; 10-B-side single-gear planetary set planetary carrier; 11-B-side single-gear planetary set sun gear; 12-B-side single-gear planetary set planetary gear; 13-B-side single-gear planetary set ring gear; 14-B-side half shaft; 15-B-side wheel-side planetary reduction mechanism sun gear; 16-B-side wheel-side planetary reduction mechanism planetary carrier; 17-B-side wheel-side planetary reduction mechanism planetary gear; 18-B-side wheel-side planetary reduction mechanism ring gear; 9-B-side motor rotor; 20-B-side motor stator; 21-A-side two-speed second planetary gear set sun gear; 22-A-side two-speed second planetary gear set planetary carrier; 23-A-side two-speed second planetary gear set planetary gear; 24-A-side two-speed second planetary gear set ring gear; 25-A-side two-speed first planetary gear set planetary gear; 26-A-side two-speed first planetary gear set ring gear; 27-A-side two-speed first planetary gear set planetary carrier; 28-A-side two-speed first planetary gear set sun gear; 29-Two-speed second planetary gear set sun gear engagement external spline; 30-Two-speed second planetary gear set planetary carrier engagement external spline; 31-Shift gear sleeve long section internal spline; 32-Shift gear sleeve external spline; 33-Shift gear sleeve short section internal spline; 34-Fixed engagement gear internal spline. Detailed Implementation

[0063] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0064] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0065] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0069] See Figures 1 to 4 As shown, Figure 1 This illustration shows a schematic diagram of the coaxial dual-motor electric drive bridge assembly with wheel-side reducers provided in one embodiment of this application. Figure 2 It shows Figure 1 A schematic diagram of the structure of the second planetary gear sun wheel on side A. Figure 3 It shows Figure 1 A schematic diagram of the structure of the second planetary carrier on the A-side. Figure 4 This illustration shows a schematic diagram of the shifting assembly structure of a coaxial dual-motor electric drive axle assembly with wheel-side reducers provided in one embodiment of this application. The coaxial dual-motor electric drive axle assembly with wheel-side reducers provided in one embodiment of this application includes: a housing, a two-speed drive motor assembly on side A, a single-speed drive motor assembly on side B, a two-speed power unit on side A, a single-speed power unit on side B, a differential, a wheel-side reduction assembly on side A, and a wheel-side reduction assembly on side B. Both the two-speed drive motor assembly on side A and the single-speed drive motor assembly on side B are installed within the housing, with the output terminal of the single-speed drive motor assembly on side B coaxially arranged with the output terminal of the two-speed drive motor assembly on side A. The input terminal of the two-speed power unit on side A is coaxially connected to the output terminal of the two-speed drive motor assembly on side A. The input terminal of the single-speed power unit on side B is coaxially connected to the output terminal of the single-speed drive motor assembly on side B. The input terminal of the differential is connected to at least one of the output terminals of the two-speed power unit on side A and the single-speed power unit on side B. The input terminal of the wheel-side reduction assembly on side A is connected to the output terminal of the differential, and the output terminal of the wheel-side reduction assembly on side A is connected to the wheel end. The input terminal of the wheel-side reduction assembly on side B is connected to the output terminal of the differential, and the output terminal of the wheel-side reduction assembly on side B is connected to the wheel end.

[0070] The components will be explained in detail below.

[0071] The A-side two-speed drive motor assembly includes: an A-side motor stator 1, an A-side motor rotor 2, and an A-side motor shaft. The A-side motor stator 1 is fixedly connected to the housing. The A-side motor shaft is hollowly fitted onto the A-side half-shaft 8.

[0072] The A-side two-speed power unit includes: a first planetary gear set for two-speed A, a second planetary gear set for two-speed A, and a shifting assembly. The input terminal of the first planetary gear set for two-speed A is connected to the output terminal of the drive motor assembly for two-speed A; the input terminal of the second planetary gear set for two-speed A is connected to the output terminal of the first planetary gear set for two-speed A; the shifting assembly is connected to the sun gear of the second planetary gear set for two-speed A and the planet carrier of the second planetary gear set for two-speed A, respectively. Further detailed descriptions of the components in the A-side two-speed power unit are as follows:

[0073] The first planetary gear set assembly with two gears on side A includes: a planetary gear 25, a ring gear 26, a planet carrier 27, and a sun gear 28. The sun gear 28 is fixedly mounted on the motor shaft on side A. The planetary gear 25 is mounted on the planetary shaft on the planet carrier 27 via bearings. The planetary gear 25 meshes with both the sun gear 28 and the ring gear 26. The ring gear 26 is fixedly connected to the housing.

[0074] The second planetary gear set assembly on side A includes: a sun gear 21, a planet carrier 22, planet gears 23, and a ring gear 24. The sun gear 21 is hollowly fitted onto the half-shaft 8 on side A. The planet carrier 22 is hollowly fitted onto the sun gear 21. The planet gears 23 are mounted on the planet shafts of the planet carrier 22 via bearings. The planet gears 23 mesh with both the sun gear 21 and the ring gear 24. The ring gear 24 is connected to the planet carrier 27 of the first planetary gear set on side A.

[0075] The shift assembly includes: a shift sleeve 3, an external spline 29 connecting the sun gears of the second planetary gear set for two gears, an internal spline 34 connecting the fixed gears, and an external spline 30 connecting the planet carriers of the second planetary gear set for two gears. The shift sleeve 3 has, along its axial direction, a long internal spline 31, an external spline 32, and a short internal spline 33. When shifting to first gear, the shift sleeve 3 moves to the left as shown in the diagram, connecting the long internal spline 31 to the external spline 29 connecting the sun gears of the second planetary gear set for two gears, while simultaneously connecting the external spline 32 to the internal spline 34 connecting the fixed gears. When shifting to second gear, the shift sleeve 3 moves to the right as shown in the diagram, connecting the long internal spline 31 to the external spline 29 connecting the sun gears of the second planetary gear set for two gears, while simultaneously connecting the short internal spline 33 to the external spline 30 connecting the planet carriers of the second planetary gear set for two gears.

[0076] The A-side wheel reduction assembly includes: an A-side wheel-side planetary reduction mechanism gear ring 4, an A-side wheel-side planetary reduction mechanism planetary gear 5, an A-side wheel-side planetary reduction mechanism planet carrier 6, an A-side wheel-side planetary reduction mechanism sun gear 7, and an A-side half-shaft 8. The A-side wheel-side planetary reduction mechanism gear ring 4 is fixedly connected to the housing. The A-side wheel-side planetary reduction mechanism sun gear 7 is connected to the A-side half-shaft 8. The A-side wheel-side planetary reduction mechanism sun gear 7 and the A-side wheel-side planetary reduction mechanism planetary gear 5 are meshed through gears. The A-side wheel-side planetary reduction mechanism planetary gear 5 is mounted on the planetary gear shaft on the A-side wheel-side planetary reduction mechanism planet carrier 6 through bearings.

[0077] The B-side single-speed drive motor assembly includes: a B-side motor stator 20, a B-side motor rotor 19, and a B-side motor shaft. The B-side motor stator 20 is fixedly connected to the housing. The B-side motor shaft is hollowly fitted onto the B-side half-shaft 14.

[0078] The B-side single-gear power assembly includes: a B-side single-gear planetary carrier 10, a B-side single-gear planetary sun gear 11, a B-side single-gear planetary gear 12, and a B-side single-gear planetary ring gear 13. The B-side single-gear planetary sun gear 11 is fixedly mounted on the B-side motor shaft. The B-side single-gear planetary gear 12 is mounted on the planetary shaft on the B-side single-gear planetary carrier 10 via bearings. The B-side single-gear planetary gear 12 meshes with both the B-side single-gear planetary sun gear 11 and the B-side single-gear planetary ring gear 13. The B-side single-gear planetary ring gear 13 is fixedly connected to the housing.

[0079] The B-side wheel-end reduction assembly includes: a B-side half-shaft 14, a B-side wheel-end planetary reduction mechanism sun gear 15, a B-side wheel-end planetary reduction mechanism planetary carrier 16, a B-side wheel-end planetary reduction mechanism planetary gear 17, and a B-side wheel-end planetary reduction mechanism ring gear 18. The B-side wheel-end planetary reduction mechanism ring gear 18 is fixedly connected to the housing, the B-side wheel-end planetary reduction mechanism sun gear 15 is fixedly connected to the B-side half-shaft 14, the B-side wheel-end planetary reduction mechanism sun gear 15 and the B-side wheel-end planetary reduction mechanism planetary gear 17 are meshed by gears, and the B-side wheel-end planetary reduction mechanism planetary gear 17 is mounted on the planetary gear shaft on the B-side wheel-end planetary reduction mechanism planetary carrier 16 through bearings.

[0080] The coaxial dual-motor electric drive axle assembly with wheel-side reducer achieves switching between two gears by moving the shift sleeve 3 axially left and right.

[0081] The implementation process of first gear is explained in detail below. The shift sleeve 3 moves to the left, and the inner spline 31 of the long section of the shift sleeve connects with the outer spline 29 of the engagement tooth of the second planetary gear set of the second gear. At the same time, the outer spline 32 of the shift sleeve connects with the inner spline 34 of the fixed engagement tooth, which is equivalent to fixing the sun gear 21 of the second planetary gear set of the second gear set on side A. At this time, the power is input from the sun gear 28 of the first planetary gear set of the second gear set on side A, and then output from the planet carrier 27 of the first planetary gear set of the second gear set on side A, and then input from the ring gear 24 of the second planetary gear set of the second gear set on side A, and then output from the planet carrier 22 of the second planetary gear set of the second gear set on side A. After passing through two stages of planetary gear set deceleration, the effect of speed reduction and torque increase is achieved.

[0082] The power transmission route for the first gear is described in detail below. Power is output from the rotor 2 of the motor on side A. The sun gear 28 of the first planetary gear set on side A is fixedly mounted on the motor shaft on side A, and power is transmitted to the sun gear 28 of the first planetary gear set on side A. The ring gear 26 of the first planetary gear set on side A meshes with the planetary gear 25 of the first planetary gear set on side A, transmitting power to the planetary gear 25 of the first planetary gear set on side A. The planetary gear 25 of the first planetary gear set on side A is mounted on the planetary shaft of the planet carrier 27 of the first planetary gear set on side A via bearings, transmitting power to the planet carrier 27 of the first planetary gear set on side A. The planet carrier 27 of the first planetary gear set on side A is fixedly connected to the ring gear 24 of the second planetary gear set on side A, transmitting power to the ring gear 24 of the second planetary gear set on side A. The ring gear 24 of the second planetary gear set on side A meshes with the planetary gear 23 of the second planetary gear set on side A, transmitting power to the planetary gear 23 of the second planetary gear set on side A. The planetary gear 23 of the second planetary gear set on side A is mounted on the planetary shaft on the planetary carrier 22 of the second planetary gear set on side A via a bearing sleeve, transmitting power to the planetary carrier 22 of the second planetary gear set on side A. The planetary carrier 22 of the second planetary gear set on side A is connected to the differential 9, transmitting power to the differential 9. The differential 9 is fixedly connected to the half-shaft 8 on side A, transmitting power to the half-shaft 8 on side A. The half-shaft 8 on side A is fixedly connected to the sun gear 7 of the planetary reduction mechanism on side A, thus transmitting power to the sun gear 7 of the planetary reduction mechanism on side A. The sun gear 7 of the planetary reduction mechanism on side A and the planetary gear 5 of the planetary reduction mechanism on side A engage, transmitting power to the planetary gear 5 of the planetary reduction mechanism on side A. The planetary gear 5 of the planetary reduction mechanism on side A is mounted on the planetary gear shaft on the planetary carrier 6 of the planetary reduction mechanism on side A via a bearing sleeve, thus transmitting power to the planetary carrier 6 of the planetary reduction mechanism on side A, and thus the power is output to the wheel end through the planetary carrier 6 of the planetary reduction mechanism on side A.

[0083] The implementation process of second gear will now be explained in detail. The shift sleeve 3 moves to the right, and the inner spline 31 of the long section of the shift sleeve connects to the outer spline 29 of the engagement gear of the second planetary gear set. The inner spline 33 of the short section of the shift sleeve connects to the outer spline 30 of the engagement gear of the planetary carrier of the second planetary gear set. This is equivalent to the connection between the sun gear 21 and the planetary carrier 22 of the second planetary gear set on side A. Due to the characteristics of the planetary gear set, this is equivalent to the second planetary gear set on side A being locked, with a transmission ratio of 1. At this time, power is input from the sun gear 28 of the first planetary gear set on side A, then output from the planet carrier 27 of the first planetary gear set on side A, then input from the ring gear 24 of the second planetary gear set on side A, and finally output from the planet carrier 22 of the second planetary gear set on side A. However, in reality, it only goes through one stage of planetary gear set reduction, resulting in a higher speed compared to first gear.

[0084] The power transmission route for the second gear is described in detail below. Power is output from the rotor 2 of the motor on side A. The sun gear 28 of the first planetary gear set on side A is fixedly mounted on the motor shaft on side A, and power is transmitted to the sun gear 28 of the first planetary gear set on side A. The ring gear 26 of the first planetary gear set on side A is fixed. The planetary gear 25 of the first planetary gear set on side A meshes with the sun gear 28 and the ring gear 26 of the first planetary gear set on side A, transmitting power to the planetary gear 25 of the first planetary gear set on side A. The planetary gear 25 of the first planetary gear set on side A is mounted on the planetary shaft on the planet carrier 27 of the first planetary gear set on side A via bearing sleeves, transmitting power to the planet carrier 27 of the first planetary gear set on side A. The planet carrier 27 of the first planetary gear set on side A is fixedly connected to the ring gear 24 of the second planetary gear set on side A, transmitting power to the ring gear 24 of the second planetary gear set on side A. The second planetary gear ring 24 of the second planetary gear set on side A meshes with the planetary gear 23 of the second planetary gear set on side A, transmitting power to the planetary gear 23 of the second planetary gear set on side A. The planetary gear 23 of the second planetary gear set on side A is mounted on the planetary shaft on the planetary carrier 22 of the second planetary gear set on side A via bearing sleeves, transmitting power to the planetary carrier 22 of the second planetary gear set on side A. The planetary carrier 22 of the second planetary gear set on side A is fixedly connected to the differential 9, transmitting power to the differential 9. The differential 9 is fixedly connected to the half-shaft 8 on side A, transmitting power to the half-shaft 8 on side A. The half-shaft 8 on side A is fixedly connected to the sun gear 7 of the planetary reduction mechanism on side A, thus transmitting power to the sun gear 7 of the planetary reduction mechanism on side A. The sun gear 7 of the planetary reduction mechanism on side A meshes with the planetary gear 5 of the planetary reduction mechanism on side A, transmitting power to the planetary gear 5 of the planetary reduction mechanism on side A. The planetary gear 5 of the planetary reduction mechanism on the A side wheel edge is mounted on the planetary carrier 6 of the planetary reduction mechanism on the A side wheel edge through a bearing sleeve, so that power is output to the wheel end through the planetary carrier 6 of the planetary reduction mechanism on the A side wheel edge.

[0085] The power transmission route on side B will now be described in detail. Power is output from the rotor 19 of the motor on side B. The sun gear 11 of the single-speed planetary gear set on side B is fixedly mounted on the motor shaft on side B, and power is transmitted to the sun gear 11. The ring gear 13 of the single-speed planetary gear set on side B is fixed. The sun gear 11, ring gear 13, and planetary gear 12 of the single-speed planetary gear set on side B mesh with each other, transmitting power to the planetary gear 12. The planetary gear 12 is mounted on the planetary shaft of the planetary carrier 10 of the single-speed planetary gear set on side B through bearing sleeves, outputting power to the planetary carrier 10. The planetary carrier 10 is fixedly connected to the differential 9, and power is transmitted to the differential 9. The differential 9 is fixedly connected to the half-shaft 14 on side B, and power is transmitted to the half-shaft 14. The B-side half-shaft 14 is fixedly connected to the sun gear 15 of the B-side wheel-side planetary reduction mechanism, thereby transmitting power to the sun gear 15. The sun gear 15 and the planetary gear 17 of the B-side wheel-side planetary reduction mechanism mesh, transmitting power to the planetary gear 17. The planetary gear 17 is mounted on the planet carrier 16 of the B-side wheel-side planetary reduction mechanism via bearings, thereby outputting power to the wheel end through the planet carrier 16.

[0086] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coaxial dual-motor electric drive bridge assembly with wheel-side reducers, characterized in that, include: The two-speed drive motor assembly on side A is installed inside the housing; A single-speed drive motor assembly on side B is installed inside the housing; the output end of the single-speed drive motor assembly on side B is coaxially arranged with the output end of the two-speed drive motor assembly on side A. The input end of the two-speed power unit on side A is coaxially connected to the output end of the two-speed drive motor assembly on side A. The input end of the single-speed power assembly on side B is coaxially connected to the output end of the single-speed drive motor assembly on side B. The differential is connected to the output of the two-speed power unit on side A and the output of the single-speed power assembly on side B. A-side wheel-side reduction assembly, wherein the input end of the A-side wheel-side reduction assembly is connected to the output end of the differential, and the output end of the A-side wheel-side reduction assembly is connected to the wheel end; as well as B-side wheel-side reduction assembly, wherein the input end of the B-side wheel-side reduction assembly is connected to the output end of the differential, and the output end of the B-side wheel-side reduction assembly is connected to the wheel end; The two-speed power unit on side A includes a shifting assembly. The shifting assembly switches the two-speed drive motor assembly on side A to first speed, and it works simultaneously with the single-speed drive motor assembly on side B to achieve dual-motor coupled output; or, the shifting assembly switches the two-speed drive motor assembly on side A to second speed, and the single-speed drive motor assembly on side B stops running. The speed of the second gear is higher than that of the first gear.

2. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 1, characterized in that, The two-speed power unit on side A includes: The input terminal of the first planetary gear set on side A is connected to the output terminal of the second-speed drive motor assembly on side A. The second planetary gear set on side A, with its input terminal connected to the output terminal of the first planetary gear set on side A, is further described as follows: The shifting assembly is connected to the sun gear of the second planetary gear set assembly on side A and the planet carrier of the second planetary gear set assembly on side A.

3. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 2, characterized in that, The first planetary gear assembly on side A includes: The first planetary gear ring on side A is installed inside the housing; The sun gear of the first planetary gear set on side A is sleeved and connected to the output end of the drive motor assembly on side A. The two-speed first planetary gear set on side A is meshed between the sun gear and the ring gear of the two-speed first planetary gear set on side A; and The planetary gears of the first planetary gear set on the second gear side A are mounted on the planet shafts on one side of the planetary gear set on the second gear side A.

4. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 3, characterized in that, The A-side two-gear second planetary gear assembly includes: The second planetary gear ring of the two gears on side A is connected to the other side of the planet carrier of the first planetary gear of the two gears on side A. The second planetary gear sun gear on side A is hollowly connected to the input end of the wheel-side reduction assembly on side A. The second planetary gears of the second planetary set on side A are meshed between the sun gear of the second planetary set on side A and the ring gear of the second planetary set on side A. The second planetary gear carrier of the second planetary gear set on side A is mounted on the planet shaft of the second planetary gear carrier on side A, and the second planetary gear carrier of the second planetary gear set on side A is connected to the input end of the differential.

5. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 4, characterized in that, The shifting assembly includes: A shift sleeve, wherein the shift sleeve is provided with an internal spline on a long section, an external spline on a long section, and an internal spline on a short section along the axial direction. The external spline of the second planetary gear set of the two gears is connected to the internal spline of the long section of the shift sleeve; A fixed internal spline is connected to the external spline of the shift sleeve; and The second planetary gear carrier of the two gears is connected by an external spline, which is connected to the internal spline of the short section of the shift sleeve.

6. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 1, characterized in that, The A-side wheel-side reduction assembly includes: The input end of the A-side half-shaft is coaxially connected to the output end of the differential; The sun gear of the planetary reduction mechanism on side A is sleeved and connected to the output end of the half-shaft on side A. A side wheel planetary reduction gear ring is installed inside the housing; The planetary gear of the planetary reduction mechanism on side A is meshed between the sun gear and the ring gear of the planetary reduction mechanism on side A; and The planetary carrier of the planetary reduction mechanism on the A-side wheel edge has planetary gears mounted on the planetary shafts of the planetary carrier; the planetary carrier of the A-side wheel edge is connected to the wheel end.

7. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 1, characterized in that, The two-speed drive motor assembly on side A includes: The motor shaft on side A is coaxially connected to the motor rotor on side A, and the motor shaft on side A is connected to the input end of the two-speed power unit on side A; and The stator of the motor on side A is sleeved on the rotor of the motor on side A, and the stator of the motor on side A is installed inside the housing.

8. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 1, characterized in that, The single-speed power assembly on side B includes: The B-side single-gear planetary gear sun gear is sleeved and connected to the output end of the B-side single-gear drive motor assembly; A single-stop planetary gear ring on side B is installed inside the housing; The B-side single-gear planetary gear is meshed between the B-side single-gear planetary gear sun gear and the B-side single-gear planetary gear ring gear; and The B-side single-gear planetary gear set planetary carrier has planetary gears mounted on planetary shafts on the B-side single-gear planetary gear set planetary carrier, and the B-side single-gear planetary gear set planetary carrier is connected to the input end of the differential.

9. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 1, characterized in that, The B-side wheel-side reduction assembly includes: The input end of the B-side half-shaft is coaxially connected to the output end of the differential. The sun gear of the planetary reduction mechanism on side B is sleeved and connected to the output end of the half-shaft on side B. The B-side planetary reduction gear ring is installed inside the housing; The planetary gear of the B-side planetary reduction mechanism is meshed between the sun gear and the ring gear of the B-side planetary reduction mechanism; and The planetary carrier of the B-side wheel-side planetary reduction mechanism has planetary gears mounted on the planetary shafts of the B-side wheel-side planetary reduction mechanism planetary carrier; the B-side wheel-side planetary reduction mechanism planetary carrier is connected to the wheel end.

10. The coaxial dual-motor electric drive bridge assembly with wheel-side reducer according to claim 1, characterized in that, The single-speed drive motor assembly on side B includes: The B-side motor shaft is coaxially connected to the B-side motor rotor and is also connected to the input end of the B-side single-speed power assembly; and The B-side motor stator is sleeved on the B-side motor rotor, and the B-side motor stator is installed inside the housing.

Images