Low-floor gate-type wheel-side motor rear axle for electric bus

Abstract

The invention relates to a low-floor gate-type wheel-side motor rear axle for an electric bus. The low-floor gate-type wheel-side motor rear axle comprises an axle shell, a motor, a first-stage speed reducer, a second-stage speed reducer, a brake and a wheel hub, wherein the front end of a shell of the first-stage speed reducer is connected with the axle shell; a stator of the motor is fixed in the front end of the shell of the first-stage speed reducer; a rotor is connected with the output shaft of the motor to drive the output shaft of the motor to rotate; the output shaft of the motor is parallel to the axial direction of the wheel hub; the first-stage speed reduction is transmission of a cylindrical bevel gear pair, and second-stage speed reduction is transmission of a cylindrical gear planet system; the brake is arranged outside the shell of the first-stage speed reducer and used for braking the wheel hub; and the motor, the first-stage speed reducer, the second-stage speed reducer, the brake and the wheel hub are symmetrically arranged on the left side and the right side of the axle shell. A wheel-side driving axle motor of the electric bus is integrated in the axle shell; a power transmission direction is parallel to the axial direction of the wheel hub, namely a wheel; and the low-floor gate-type wheel-side motor rear axle has a rational and compact structural design and high transmission efficiency.

Description

technical field [0001] The invention belongs to the field of passenger car chassis rear axle assemblies, and in particular relates to a low-floor door-type wheel-side motor rear axle for electric passenger cars. Background technique [0002] Both the traditional automobile axle and the traditional motor have been developed relatively maturely. Under the general trend of electric vehicle development, the vast majority of electric vehicle manufacturers just replace the engine with a motor to provide power, and continue to use the traditional vehicle transmission system (drive shaft, final drive, differential, etc.) to combine the two The latter are mechanically combined together, so that not only the structure is complex, the transmission efficiency is low, and the economy is poor; the curb weight of the car is large, which limits the driving range of the electric car to a certain extent; it is restricted by the structural form of the main reducer , the door distance and low ...

AI Technical Summary

Problems solved by technology

Under the general trend of electric vehicle development, the vast majority of electric vehicle manufacturers just replace the engine with a motor to provide power, and continue to use the traditional vehicle transmission system (drive shaft, final drive, differential, etc.) to combine the two The latter are mechanically combined together, so that not only the structure is complex, the transmission efficiency is low, and the economy is poor; the curb weight of the car is large, which limits the driving range of the electric car to a certain extent; it is restricted by the structural form of the main reducer , the door distance and low floor are limited; the unsprung mass is large, and the vehicle handling stability is poor

Images