Drive assembly and vehicle

Patent metadata

Field	Value
Publication number	US-12502953-B2
Application number	US-202117908655-A
Country	US
Kind code	B2
Filing date	Mar 3, 2021
Priority date	Mar 3, 2020
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A drive assembly includes: a reduction gearbox including a reduction gearbox housing, a reduction gearbox input shaft, and a reduction gearbox output component, the reduction gearbox input shaft and the reduction gearbox output component being drivingly connected to each other and arranged in the reduction gearbox housing; a motor including a motor housing, a motor stator, and a motor rotor, the motor stator being arranged in the motor housing and fixedly connected to the motor housing, the motor rotor being arranged in the motor stator, the motor rotor including a motor output shaft drivingly connected to the reduction gearbox input shaft; and an axle including an axle housing and an axle input shaft arranged in the axle housing, the axle input shaft being drivingly connected w the reduction gearbox output component. The motor housing and the axle housing are fixedly connected to the reduction gearbox housing.

First claim

What is claimed is:

1 . A drive assembly, comprising:
a reduction gearbox comprising a reduction gearbox housing, a reduction gearbox input shaft, and a reduction gearbox output component, the reduction gearbox input shaft and the reduction gearbox output component being arranged in the reduction gearbox housing, the reduction gearbox input shaft being drivingly connected to the reduction gearbox output component; a motor comprising a motor housing, a motor stator, and a motor rotor, the motor stator being arranged in the motor housing and fixedly connected to the motor housing, the motor rotor being arranged in the motor stator, the motor rotor comprising a motor output shaft, the motor output shaft being drivingly connected to the reduction gearbox input shaft; and an axle comprising an axle housing and an axle input shaft arranged in the axle housing, the axle input shaft being drivingly connected to the reduction gearbox output component, wherein the motor housing and the axle housing are fixedly connected to the reduction gearbox housing; and the motor housing comprises a motor shell and a motor end cover, the motor shell is fixedly connected to the reduction gearbox housing, the motor end cover is arranged at an end of the motor shell facing away from the reduction gearbox housing, and the motor stator is arranged in the motor shell and fixedly connected to the motor shell.

2 . The drive assembly of claim 1 , wherein the motor housing and the reduction gearbox housing are connected by a bolt.

3 . The drive assembly of claim 1 , wherein the axle housing and the reduction gearbox housing are connected by a bolt.

4 . The drive assembly of claim 1 , wherein the axle is a rear axle.

5 . The drive assembly of claim 1 , wherein the axle and the motor are located on a same side of the reduction gearbox housing.

6 . The drive assembly of claim 1 , wherein the axle is located on a first side of the reduction gearbox housing, the motor is located on a second side of the reduction gearbox housing, and the first side and the second side are two opposite sides of the reduction gearbox housing.

7 . The drive assembly of claim 1 , wherein the motor shell has a coolant channel, a first interface, and a second interface, the first interface and the second interface are located at two ends of the coolant channel respectively, and the first interface and the second interface are communicated with the coolant channel.

8 . The drive assembly of claim 1 , wherein the motor stator comprises a stator body and a stator winding arranged on the stator body;
wherein the reduction gearbox housing has a power supply cable connection chamber, and the stator winding extends into the power supply cable connection chamber.

9 . A drive assembly, comprising:
a reduction gearbox comprising a reduction gearbox housing, a reduction gearbox input shaft, and a reduction gearbox output component, the reduction gearbox input shaft and the reduction gearbox output component being arranged in the reduction gearbox housing, the reduction gearbox input shaft being drivingly connected to the reduction gearbox output component; a motor comprising a motor housing, a motor stator, and a motor rotor, the motor stator being arranged in the motor housing and fixedly connected to the motor housing, the motor rotor being arranged in the motor stator, the motor rotor comprising a motor output shaft, the motor output shaft being drivingly connected to the reduction gearbox input shaft; and an axle comprising an axle housing and an axle input shaft arranged in the axle housing, the axle input shaft being drivingly connected to the reduction gearbox output component, wherein the motor housing and the axle housing are fixedly connected to the reduction gearbox housing; wherein the axle input shaft is provided with an axle transmission gear; wherein the reduction gearbox further comprises: a first gear fixedly connected to the reduction gearbox input shaft; a first transmission shaft arranged in the reduction gearbox housing; a second gear fixedly connected to the first transmission shaft, the second gear meshing with the first gear; and a third gear fixedly connected to the first transmission shaft, the third gear and the second gear being arranged along an axial direction of the first transmission shaft; and wherein the reduction gearbox output component comprises: a reduction gearbox output shaft arranged in the reduction gearbox housing; a fourth gear fixedly connected to the reduction gearbox output shaft, the third gear being drivingly connected to the fourth gear; and a fifth gear fixedly connected to the reduction gearbox output shaft, the fourth gear and the fifth gear being arranged along an axial direction of the reduction gearbox output shaft, the axle transmission gear meshing with the fifth gear.

10 . The drive assembly of claim 9 , wherein the reduction gearbox further comprises:
a second transmission shaft arranged in the reduction gearbox housing; and a sixth gear fixedly connected to the second transmission shaft, the sixth gear meshing with the third gear and the fourth gear respectively.

11 . The drive assembly of claim 10 , wherein the reduction gearbox further comprises an oil pump input shaft and an oil pump, one end of the oil pump input shaft is drivingly connected to the second transmission shaft, and the other end of the oil pump input shaft is drivingly connected to the oil pump.

12 . The drive assembly of claim 11 , wherein the reduction gearbox further comprises a first pin shaft,
a second mounting chamber is formed inside the second transmission shaft, the oil pump input shaft is partially located in the second mounting chamber, a mounting hole is formed at an end of the oil pump input shaft located in the second mounting chamber, the first pin shaft is inserted into the second transmission shaft along a radial direction of the second transmission shaft, and the first pin shaft penetrates the second mounting chamber and the mounting hole, and the oil pump is arranged at an end of the oil pump input shaft located outside the second mounting chamber.

13 . The drive assembly of claim 9 , wherein the reduction gearbox output component further comprises:
an axial positioning mechanism, two ends of the axial positioning mechanism abutting against the fourth gear and the fifth gear respectively, the axial positioning mechanism being fitted over the reduction gearbox output shaft; a connection apparatus abutting against an end of the fourth gear facing away from the fifth gear and being fixedly connected to the reduction gearbox output shaft; and a shaft end baffle located at an end of the connection apparatus facing away from the fourth gear and abutting against the connection apparatus.

14 . The drive assembly of claim 13 , wherein the axial positioning mechanism comprises:
a positioning shell having a stop ring on a radial inner side; a first tapered roller bearing fitted over the reduction gearbox output shaft and arranged between the stop ring and the fifth gear, an outer ring of the first tapered roller bearing abutting against the stop ring, an inner ring of the first tapered roller bearing abutting against the fifth gear, and an opening direction of a taper of the first tapered roller bearing facing towards the fifth gear; and a second tapered roller bearing fitted over the reduction gearbox output shaft and arranged between the stop ring and the fourth gear, an outer ring of the second tapered roller bearing abutting against the stop ring, and an inner ring of the second tapered roller bearing abuttin

Assignees

• Segway Tech Co Ltd

Inventors

• Chen Hongbo
• Deng Zhengchang

Classifications

• F16H2057/02052

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

• F16H2057/02034

  Gearboxes combined or connected with electric machines · CPC title

• F16H57/0436

  Pumps · CPC title

• F16H57/021

  Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings · CPC title

• F16H1/22

  with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts · CPC title