Low-floor modularized electric axle

Abstract

A low-floor modularized electric axle comprises an axle, disc type hub motors, hubs and a rim; disc type hub motor mounting positions are arranged at two ends of the axle; the disc type hub motors comprise housings, motor stators, rotor magnetic poles, rotor magnet yokes and motor rotating shafts; the housings are mounted at the disc type hub motor mounting positions at any end of the axle; the motor stators are fixed on the inner walls of the housings; the motor rotating shaft are fixed on the housings in a rotatable manner; the rotor magnet yokes are fixed together with the motor rotating shafts; the rotor magnetic poles are fixed on the rotor magnet yokes; the motor stators surround the rotor magnet yokes; the internal circular surfaces of the hubs are connected with the external side ends of the motor rotating shafts through splines; the external circular surfaces of the hubs are supported at the inner edges of the motor housings through two conical roller bearings; the rims are fixed together with the hubs; and brake discs are mounted on the internal side of a frame and connected with the internal side ends of the motor rotating shafts through splines. The low-floor modularized electric axle has the advantages that the service life of the motor can be prolonged, the reliability of the motor can be improved and the height of a compartment floor can be reduced.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a low-floor modular electric axle. Background technique [0002] The transmission system of the existing vehicle is installed at the bottom of the vehicle, including: gearbox, transmission shaft and drive axle, which has the obvious disadvantage of low transmission efficiency, and its typical value is 0.82 to 0.85, which cannot meet the energy consumption and emissions proposed for vehicles in the future Require. [0003] At present, there are more and more buses using electric drive, and most of the axles used by electric drive buses are traditional axles for electrification. In the existing electric axle structure, the motor shaft is usually connected to the wheel shaft through a reducer, so that the force of the wheel is mainly transmitted to the wheel shaft, and the motor shaft connected to it is deformed, which will inevitably reduce the life of the motor and re...

AI Technical Summary

Problems solved by technology

In the existing electric axle structure, the motor shaft is usually connected to the wheel shaft through a reducer, so that the force of the wheel is mainly transmitted to the wheel shaft and deforms the motor shaft connected to it, which inevitably reduces the life of the motor and reliability

[0004] Moreover, the traditional axle has a large number of transmission parts, and more transmission parts occupy a large layout space, and the compactness is poor, resulting in a very low space occupancy rate, which not only reduces the interior space of the bus, but also increases its floor height

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