Electric driving rear axle assembly for light medium-type vehicle

Abstract

The invention provides an electric driving rear axle assembly for a light medium-type vehicle. The electric driving rear axle assembly comprises an electric driving rear axle shell assembly, a drivingmotor, a reducer assembly and a differential assembly. The driving motor is used for providing driving force, the axis of the driving motor is parallel to the axes of wheels of the vehicle, but the driving motor and the wheels of the vehicle are not coaxial. The reducer assembly and the driving motor are fixed to the driving rear axle shell assembly together in a relatively independent mode, andthe reducer assembly is detachably connected with the driving motor and used for conducting speed reduction and torque increasing on the driving force provided by the driving motor. The differential assembly is used for distributing the driving force subjected to speed reduction and torque increasing to a left half axle and a right half axle of the vehicle, and the driving force is transmitted tothe left wheel and the right wheel of the vehicle through the left half axle and the right half axle so as to drive the vehicle to travel. Gears of the reducer assembly all adopt involute cylindricalgears and thus have the same torque capacity in forward rotation and reverse rotation of the driving motor. Therefore, transmission of the same torque capacity in the forward and reverse directions can be achieved, and it is ensured that the service life of the reducer assembly is not shortened while the energy recovery rate is increased.

Description

technical field [0001] The invention relates to the field of electric drive rear axle assembly, in particular to an electric drive rear axle assembly for light and medium-sized vehicles. Background technique [0002] Recently, the development momentum of electric commercial vehicles is very rapid, and electric drive axle technology has also obtained unprecedented development opportunities. However, traditional electric commercial vehicles use motors to replace the original engine and transmission. The solution is to provide power from the drive motor, which is transmitted to the ordinary drive axle through the drive shaft, and then to the wheels to realize the vehicle operation. The problem brought about by this solution is that it reduces the chassis load. Space layout, especially pure electric and hybrid vehicles, the contradiction of space layout is more prominent. At present, there are many layout schemes for electric drive axles, such as: [0003] The first type is a ...

AI Technical Summary

Problems solved by technology

[0007] An object of the present invention is to solve the technical problem that it is difficult to arrange drum-type air brake and shock absorber device at the same time in the light and medium-sized electric drive axle structure in the prior art

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