A dual-motor integrated wheel edge reducer assembly
By using a dual-motor integrated wheel-side reducer assembly, the problems of long transmission chains, low efficiency, and low integration in existing new energy vehicles have been solved, achieving a highly efficient and reliable drive solution suitable for heavy-load and high-torque conditions.
Patent Information
- Application Number
- CN202611276355.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-21
- Publication Date
- 2026-11-06
AI Technical Summary
The existing central motor + main reducer + axle housing architecture of new energy vehicles has problems such as long transmission chain, low efficiency, large space occupation, low integration of wheel-side reducer motor and reduction mechanism, bulky housing, poor maintainability, and difficulty in meeting the high reliability requirements under heavy load and high torque conditions.
It adopts a dual-motor integrated wheel-side reducer assembly, which includes symmetrically arranged drive motors connected to the gearbox and combined with the wheel-side reducer through the transmission shaft. It adopts a compact structural design, uses aluminum alloy materials and spiral bevel gears to increase integration and transmission efficiency, and improves maintenance convenience through oil seal assembly and support bearings.
It achieves a drive solution with compact structure, high transmission efficiency, strong load-bearing capacity, and convenient maintenance, meeting the high reliability requirements under heavy load and high torque conditions.
Smart Images
Figure CN123040586A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electric drive assemblies for new energy vehicles, specifically to a dual-motor integrated wheel-side reducer assembly. Background Technology
[0002] Currently, most new energy vehicles adopt a central motor + main reducer + axle housing architecture. This structure has problems such as long transmission chain, low efficiency, and large space occupation. Although distributed drive solutions can improve efficiency, existing wheel-side reducers have defects such as low integration between motor and reduction mechanism, bulky housing, and poor maintainability, making it difficult to meet the high reliability requirements under heavy load and high torque conditions. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a dual-motor integrated wheel-side reducer assembly. This wheel-side reducer features a compact structure, high transmission efficiency, strong load-bearing capacity, and convenient maintenance.
[0004] The objective of this invention is achieved by the following solution: a dual-motor integrated wheel-side reducer assembly, comprising two symmetrically arranged drive motors, wherein the drive motors are connected to a gearbox, and both ends of the gearbox are respectively connected to a wheel-side reducer via a transmission shaft, wherein the wheel-side reducer comprises a front wheel-side reducer and a middle wheel-side reducer. The front wheel side reducer includes an upper housing, a lower housing, and a front drive bevel gear shaft. The spline shaft of the front drive bevel gear shaft passes through the right end of the front wheel side reducer housing. A front drive bevel gear is located on the left side of the spline shaft of the front drive bevel gear shaft. A front driven bevel gear shaft is axially arranged in the lower housing. A front driven bevel gear is sleeved on the upper end of the front driven bevel gear shaft. The front drive bevel gear and the front driven bevel gear mesh with each other. A front locking nut is circumferentially sleeved on the top end of the front driven bevel gear shaft. The middle wheel-side reducer includes a middle wheel-side reducer upper housing, a middle wheel-side reducer lower housing at the lower end of the middle wheel-side reducer upper housing, a middle driving bevel gear shaft in the front wheel-side reducer upper housing, both ends of the middle driving bevel gear shaft are splined shafts, the splined shaft of the middle driving bevel gear shaft passes through both ends of the middle wheel-side reducer housing, a middle driving bevel gear is provided on the left side of the right end splined shaft of the middle driving bevel gear shaft, the outer circumference of the splined shaft of the middle driving bevel gear shaft is connected to a connecting flange respectively, a middle driven bevel gear shaft is axially arranged in the middle wheel-side reducer lower housing, a middle driven bevel gear is sleeved on the upper end of the middle driven bevel gear shaft, the middle driving bevel gear and the middle driven bevel gear mesh with each other, and a middle locking nut is sleeved on the top circumference of the middle driven bevel gear shaft; The splined shafts at both ends of the middle drive bevel gear shaft are connected to the drive shaft via connecting flanges, and are connected to the front drive bevel gear shaft and the output shaft of the gearbox via the drive shaft.
[0005] The upper housing of the front wheel-side reducer and the lower housing of the front wheel-side reducer are fixed together by bolts, and the upper housing of the middle wheel-side reducer and the lower housing of the middle wheel-side reducer are fixed together by bolts.
[0006] A front rolling bearing is provided between the front driving bevel gear shaft and the upper housing of the front wheel-side reducer for support, and a front support bearing is provided between the front driven bevel gear shaft and the lower housing of the front wheel-side reducer for support; a middle rolling bearing is provided between the middle driving bevel gear shaft and the upper housing of the middle wheel-side reducer for support, and a middle support bearing is provided between the middle driven bevel gear shaft and the lower housing of the middle wheel-side reducer for support.
[0007] A front adjusting screw ring and a front output oil seal assembly are installed between the left end of the front drive bevel gear shaft and the upper housing of the front wheel-side reducer; a front input oil seal assembly is installed between the right end of the front drive bevel gear shaft and the upper housing of the front wheel-side reducer; a middle adjusting screw ring and a middle oil seal assembly are installed between the left connecting flange of the middle drive bevel gear shaft and the upper housing of the middle wheel-side reducer; a middle oil seal assembly is installed between the right connecting flange of the middle drive bevel gear shaft and the upper housing of the middle wheel-side reducer.
[0008] A front wheel-side combined oil seal assembly is provided between the lower end of the front driven bevel gear shaft and the lower housing of the front wheel-side reducer; a middle wheel-side combined oil seal assembly is provided between the lower end of the middle driven bevel gear shaft and the lower housing of the middle wheel-side reducer.
[0009] A retaining ring for the front hole and a front mounting distance adjustment shim are provided between the upper end of the front driven bevel gear shaft and the lower housing of the front wheel-side reducer; a retaining ring for the middle hole and a middle mounting distance adjustment shim are provided between the upper end of the middle driven bevel gear shaft and the lower housing of the middle wheel-side reducer.
[0010] The front wheel-side reducer housing, the front wheel-side reducer lower housing, the middle wheel-side reducer upper housing, and the middle wheel-side reducer lower housing are all made of aluminum alloy.
[0011] The front driving bevel gear, the front driven bevel gear, the middle driving bevel gear, and the middle driven bevel gear are spiral bevel gears.
[0012] The advantage of this invention is that by highly integrating the dual drive motors and the wheel-side reduction mechanism into one unit, a drive solution with a compact structure, high transmission efficiency, strong load-bearing capacity, and convenient maintenance is achieved. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the front wheel side reducer structure; Figure 3 This is a sectional view of the front wheel side reducer; Figure 4 This is a side view of the front wheel reducer; Figure 5 Rear view of the front wheel reducer; Figure 6 This is a schematic diagram of the structure of the center wheel-side reducer; Figure 7 This is a sectional view of the center wheel-side reducer; Figure 8 This is a side view of the center wheel-side reducer; Figure 9 This is a rear view of the center wheel-side reducer. Detailed Implementation
[0014] like Figures 1 to 9 As shown, a dual-motor integrated wheel-side reducer assembly includes two symmetrically arranged drive motors 1. The drive motors 1 are connected to a gearbox 2. The two ends of the gearbox 2 are respectively connected to a wheel-side reducer via a transmission shaft 4. The transmission shaft is a universal joint. The wheel-side reducer includes a front wheel-side reducer 5 and a middle wheel-side reducer 3. The front wheel-side reducer 5 includes an upper front wheel-side reducer housing 51, and a lower front wheel-side reducer housing 57 is disposed at the lower end of the upper front wheel-side reducer housing 51. The upper front wheel-side reducer housing 51 and the lower front wheel-side reducer housing 57 are fixedly connected by bolts. A front drive bevel gear shaft 53 is disposed in the upper front wheel-side reducer housing 51. The spline shaft of the front drive bevel gear shaft 53 passes through the right end of the front wheel-side reducer housing 51. A front rolling bearing 514 is disposed between the front drive bevel gear shaft 53 and the upper front wheel-side reducer housing 51 for support. A front adjusting screw ring 55 and a front output oil seal assembly 56 are disposed between the left end of the front drive bevel gear shaft 53 and the upper front wheel-side reducer housing 51. A front input oil seal assembly is disposed between the right end of the front drive bevel gear shaft 53 and the upper front wheel-side reducer housing 51. The front drive bevel gear 52 is provided on the left side of the splined shaft of the front drive bevel gear shaft 53. The front driven bevel gear shaft 59 is axially provided in the lower housing 57 of the front wheel-side reducer. A front support bearing 58 is provided between the front driven bevel gear shaft 59 and the lower housing 57 of the front wheel-side reducer for support. A front wheel-side combined oil seal assembly 510 is provided between the lower end of the front driven bevel gear shaft 59 and the lower housing 57 of the front wheel-side reducer. A front driven bevel gear 511 is sleeved on the upper end of the front driven bevel gear shaft 59. The front drive bevel gear 52 and the front driven bevel gear 511 mesh with each other. A front locking nut 512 is sleeved on the top circumference of the front driven bevel gear shaft 59. A front hole retaining ring 515 and a front mounting distance adjusting shim 516 are provided between the upper end of the front driven bevel gear shaft 59 and the lower housing 57 of the front wheel-side reducer.
[0015] The intermediate wheel-side reducer 3 includes an upper housing 31 and a lower housing 38. The upper and lower housings are bolted together. A central drive bevel gear shaft 34 is housed within the upper housing 31. Both ends of the central drive bevel gear shaft 34 are splined shafts, passing through both ends of the housing 31. A central rolling bearing 32 supports the central drive bevel gear shaft 34 and the upper housing 31. A central adjusting screw ring 35 and a central oil seal assembly 36 are located between the connecting flange 37 on the left side of the central drive bevel gear shaft 34 and the upper housing 31. A central oil seal assembly 36 is also located between the connecting flange 37 on the right side of the central drive bevel gear shaft 34 and the upper housing 31. A driving bevel gear 33 is disposed on the left side of the splined shaft at the right end of the driving bevel gear shaft 34. The outer circumference of the splined shaft of the driving bevel gear shaft 34 is connected to a connecting flange 37. A driven bevel gear shaft 310 is axially disposed in the lower housing 38 of the intermediate wheel-side reducer. A support bearing 39 is disposed between the driven bevel gear shaft 310 and the lower housing 38 of the intermediate wheel-side reducer for support. An intermediate wheel-side combined oil seal assembly 39 is disposed between the lower end of the driven bevel gear shaft 310 and the lower housing 38 of the intermediate wheel-side reducer. A driven bevel gear 312 is sleeved on the upper end of the driven bevel gear shaft 310. The driving bevel gear 33 and the driven bevel gear 312 mesh with each other. A locking nut 313 is sleeved on the top circumference of the driven bevel gear shaft 310. A retaining ring 314 for the intermediate hole and an adjusting shim 315 for the intermediate mounting distance are disposed between the upper end of the driven bevel gear shaft 310 and the lower housing 38 of the intermediate wheel-side reducer.
[0016] The splined shafts at both ends of the driving bevel gear shaft 34 are connected to the drive shaft 4 via connecting flanges 37, and the drive shaft 4 is connected to the front driving bevel gear shaft 53 and the output shaft of the gearbox 2, respectively. In the wheel-side reducer assembly, two parallel wheel-side reducers are connected by connecting plates 6, and bolts are used to fix the two ends of the connecting plates 6 to the wheel-side reducers.
[0017] The front wheel-side reducer housing 51, the front wheel-side reducer lower housing 57, the middle wheel-side reducer upper housing 31, and the middle wheel-side reducer lower housing 38 are made of aluminum alloy. The front driving bevel gear 52, the front driven bevel gear 511, the middle driving bevel gear 33, and the middle driven bevel gear 312 are spiral bevel gears.
[0018] This invention relates to a wheel-side drive reducer assembly developed for an 8×8 all-terrain vehicle. The wheel-side drive adopts a dual-motor drive and H-type transmission scheme, that is, each of the left and right wheel sides uses a drive motor. The drive motor and gearbox are mounted together. After reduction, the power is split into two. One path drives the middle wheel-side reducer through the drive shaft, and the other path drives the middle wheel-side reducer on the other side through the drive shaft. The middle wheel-side reducer has a power distribution function, and the power can be transmitted to the front wheel-side reducer through the drive shaft via the drive shaft.
[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.
Claims
1. A dual-motor integrated wheel-side reducer assembly, comprising two symmetrically arranged drive motors (1), wherein the drive motors (1) are connected to a gearbox (2), characterized in that: The two ends of the gearbox (2) are respectively connected to a wheel-side reducer via a drive shaft (4), and the wheel-side reducer includes a front wheel-side reducer (5) and a middle wheel-side reducer (3). The front wheel reducer (5) includes a front wheel reducer upper housing (51), a front wheel reducer lower housing (57) is provided at the lower end of the front wheel reducer housing (51), a front driving bevel gear shaft (53) is provided in the front wheel reducer upper housing (51), the spline shaft of the front driving bevel gear shaft (53) passes through the right end of the front wheel reducer housing (51), a front driving bevel gear (52) is provided on the left side of the spline shaft of the front driving bevel gear shaft (53), a front driven bevel gear shaft (59) is axially provided in the front wheel reducer lower housing (57), a front driven bevel gear (511) is sleeved on the upper end of the front driven bevel gear shaft (59), the front driving bevel gear (52) and the front driven bevel gear (511) mesh with each other, and a front locking nut (512) is circumferentially sleeved on the top end of the front driven bevel gear shaft (59). The middle wheel-side reducer (3) includes a middle wheel-side reducer upper housing (31), a middle wheel-side reducer lower housing (38) is provided at the lower end of the middle wheel-side reducer upper housing (31), a middle drive bevel gear shaft (34) is provided in the front wheel-side reducer upper housing (31), both ends of the middle drive bevel gear shaft (34) are splined shafts, the splined shaft of the middle drive bevel gear shaft (34) passes through both ends of the middle wheel-side reducer housing (31), and a middle drive bevel gear shaft (34) is provided on the left side of the right end splined shaft of the middle drive bevel gear shaft (34). The outer circumference of the splined shaft of the driving bevel gear (33) and the driving bevel gear shaft (34) is connected to a connecting flange (37). The driven bevel gear shaft (310) is axially arranged in the lower housing (38) of the middle wheel-side reducer. The driven bevel gear (312) is sleeved on the upper end of the driven bevel gear shaft (310). The driving bevel gear (33) and the driven bevel gear (312) mesh with each other. The locking nut (313) is sleeved on the top circumference of the driven bevel gear shaft (310). The splined shafts at both ends of the middle active bevel gear shaft (34) are connected to the transmission shaft (4) via connecting flanges (37), and are connected to the front active bevel gear shaft (53) and the output shaft of the gearbox (2) via the transmission shaft (4).
2. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: The upper housing (51) of the front wheel-side reducer and the lower housing (57) of the front wheel-side reducer are fixed together by bolts, and the upper housing (31) of the middle wheel-side reducer and the lower housing (38) of the middle wheel-side reducer are fixed together by bolts.
3. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: A front rolling bearing (514) is provided between the front driving bevel gear shaft (53) and the upper housing (51) of the front wheel-side reducer for support, and a front support bearing (58) is provided between the front driven bevel gear shaft (59) and the lower housing (57) of the front wheel-side reducer for support; a middle rolling bearing (32) is provided between the middle driving bevel gear shaft (34) and the upper housing (31) of the middle wheel-side reducer for support, and a middle support bearing (39) is provided between the middle driven bevel gear shaft (310) and the lower housing (38) of the middle wheel-side reducer for support.
4. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: A front adjusting screw ring (55) and a front output oil seal assembly (56) are provided between the left end of the front drive bevel gear shaft (53) and the upper housing (51) of the front wheel-side reducer; a front input oil seal assembly (513) is provided between the right end of the front drive bevel gear shaft (53) and the upper housing (51) of the front wheel-side reducer; a middle adjusting screw ring (35) and a middle oil seal assembly (36) are provided between the connecting flange (37) on the left side of the middle drive bevel gear shaft (34) and the upper housing (31) of the middle wheel-side reducer; a middle oil seal assembly (36) is provided between the connecting flange (37) on the right side of the middle drive bevel gear shaft (34) and the upper housing (31) of the middle wheel-side reducer.
5. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: A front wheel-side combined oil seal assembly (510) is provided between the lower end of the front driven bevel gear shaft (59) and the lower housing (57) of the front wheel-side reducer; a middle wheel-side combined oil seal assembly (39) is provided between the lower end of the middle driven bevel gear shaft (310) and the lower housing (38) of the middle wheel-side reducer.
6. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: A front hole retaining ring (515) and a front mounting distance adjusting shim (516) are provided between the upper end of the front driven bevel gear shaft (59) and the lower housing (57) of the front wheel-side reducer; a middle hole retaining ring (314) and a middle mounting distance adjusting shim (315) are provided between the upper end of the middle driven bevel gear shaft (310) and the lower housing (38) of the middle wheel-side reducer.
7. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: The front wheel-side reducer housing (51), the front wheel-side reducer lower housing (57), the middle wheel-side reducer upper housing (31), and the middle wheel-side reducer lower housing (38) are made of aluminum alloy.
8. The dual-motor integrated wheel-side reducer assembly according to claim 1, characterized in that: The front driving bevel gear (52), the front driven bevel gear (511), the middle driving bevel gear (33), and the middle driven bevel gear (312) are spiral bevel gears.