Wheel-side reducer system and vehicle

Patent metadata

Field	Value
Publication number	US-12558953-B2
Application number	US-202418628878-A
Country	US
Kind code	B2
Filing date	Apr 8, 2024
Priority date	Nov 29, 2021
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A wheel-side reducer system includes a housing, a speed reduction assembly, and a steering knuckle. The housing includes a front housing and a rear housing. The front housing and the rear housing are arranged opposite to each other and define an accommodating space together. The speed reduction assembly is arranged in the accommodating space. The steering knuckle is integrally molded on the front housing. The integrally molding of the steering knuckle on the front housing not only simplifies the production process of the housing, but also makes a connection between the steering knuckle and the front housing more reliable. Meanwhile, the integration level of the wheel-side reducer system can also be improved, to reduce the size of the wheel-side reducer system. A vehicle with the wheel-side reducer system is further disclosed.

First claim

What is claimed is:

1 . A wheel-side reducer system, comprising:
a housing, comprising a front housing and a rear housing, and the front housing and the rear housing being arranged opposite to each other and defining an accommodating space together; a speed reduction assembly, arranged in the accommodating space; and a steering knuckle, integrally molded on the front housing and comprising:
a steering main body, integrally molded on a front surface of the front housing; and
a plurality of mounting portions, are arranged on an edge of the steering main body,
wherein the speed reduction assembly comprises: an input shaft, wherein an input gear is arranged on the input shaft; a first intermediate shaft, wherein a first intermediate gear is arranged on the first intermediate shaft, and the first intermediate gear is engaged with the input gear; a second intermediate shaft, wherein a second intermediate gear is arranged on the second intermediate shaft, and the second intermediate gear is engaged with the input gear; and an output shaft, wherein an output gear is arranged on the output shaft, and the output gear is engaged with both the first intermediate gear and the second intermediate gear; and wherein orthographic projections of a center line of the input gear, a center line of the first intermediate gear, a center line of the output gear, and a center line of the second intermediate gear are sequentially connected to form a non-rhombic quadrilateral.

2 . The wheel-side reducer system according to claim 1 , wherein the front housing is provided with a first input hole that matches the speed reduction assembly, the steering main body is provided with a second input hole, the second input hole and the first input hole are provided opposite to each other, and the steering main body is further provided with an avoidance space that surrounds the second input hole.

3 . The wheel-side reducer system according to claim 1 , wherein the first intermediate gear and the second intermediate gear are two gears with the same modulus and different numbers of teeth.

4 . The wheel-side reducer system according to claim 1 , further comprising a transmission shaft, the speed reduction assembly comprising an input shaft, and the transmission shaft being connected to the input shaft through a fastener to limit the transmission shaft and the input shaft in an axial direction.

5 . The wheel-side reducer system according to claim 4 , wherein a mounting hole is provided in the input shaft, and the transmission shaft is arranged in the mounting hole; and
a step portion is formed on an inner wall of the mounting hole, an internally threaded hole is formed in the transmission shaft, the fastener is a bolt, and the bolt is propped against the transmission shaft and is connected to an interior of the internally threaded hole.

6 . The wheel-side reducer system according to claim 5 , wherein the transmission shaft is further connected to the input shaft through a spline; and
an external spline is provided on the transmission shaft, the mounting hole is provided in the input shaft, an internal spline is provided in the mounting hole, an end portion of the transmission shaft extends into the mounting hole, and the external spline matches the internal spline.

7 . The wheel-side reducer system according to claim 6 , further comprising: a waterproof sealing ring, the waterproof sealing ring being arranged in the mounting hole and being sleeved over the input shaft, and the waterproof sealing ring being located on an outer side of the external spline.

8 . The wheel-side reducer system according to claim 1 , further comprising: a hub bearing, the hub bearing being arranged in the rear housing and being sleeved over the output shaft, and the rear housing being further provided with a limiting piece that is in limiting fit with the hub bearing in an axial direction.

9 . The wheel-side reducer system according to claim 8 , further comprising: a flange plate, the flange plate being fixedly connected to the output shaft, and the hub bearing being press-fitted in the flange plate.

10 . The wheel-side reducer system according to claim 1 , wherein the output gear is integrally molded on the output shaft.

11 . A vehicle, comprising: the wheel-side reducer system according to claim 1 .

12 . The wheel-side reducer system according to claim 2 , wherein the first intermediate gear and the second intermediate gear are two gears with the same modulus and different numbers of teeth.

13 . The wheel-side reducer system according to claim 1 , further comprising a transmission shaft, the speed reduction assembly comprising an input shaft, and the transmission shaft being connected to the input shaft through a fastener to limit the transmission shaft and the input shaft in an axial direction.

14 . The wheel-side reducer system according to claim 2 , further comprising a transmission shaft, the speed reduction assembly comprising an input shaft, and the transmission shaft being connected to the input shaft through a fastener to limit the transmission shaft and the input shaft in an axial direction.

15 . The wheel-side reducer system according to claim 3 , further comprising: a hub bearing, the hub bearing being arranged in the rear housing and being sleeved over the output shaft, and the rear housing being further provided with a limiting piece that is in limiting fit with the hub bearing in an axial direction.

16 . The wheel-side reducer system according to claim 3 , wherein the output gear is integrally molded on the output shaft.

Assignees

• Byd Co Ltd

Inventors

• Wu Changjia
• Liao Yinsheng
• Zhao Gaoming
• Zhang Feng
• Wang Qiang

Classifications

• F16H2057/02052

  Axle units; Transfer casings for four wheel drive · CPC title

• F16H2057/02026

  Connection of auxiliaries with a gear case; Mounting of auxiliaries on the gearbox · CPC title

• F16H57/029

  characterised by means for sealing the gearboxes, e.g. to improve airtightness · CPC title

• F16H1/20

  involving more than two intermeshing members · CPC title

• B62D7/18 Primary

  Steering knuckles; King pins · CPC title