Wheel-rim electric axle

Abstract

The invention relates to a wheel-rim electric axle for an electric automobile, belonging to the technical field of motor-driven rear axle assemblies of passenger car chassises. The wheel-rim electric axle comprises a rear axle shell assembly, two water-cooling brushless direct-current permanent magnet motors, two rear axle main reducing gear assemblies, two rear axle wheel-rim reducing gear assemblies and the like. The invention changes the transmission direction and enlarges the torque to achieve the purpose of first-stage speed reduction by using the two high-torque water-cooling brushless direct-current permanent magnet motors to simultaneously drive the left and right rear axle main reducing gear assemblies, achieves the purpose of second-stage speed reduction by the rear axle wheel-rim reducing gears, and drives the entire wheel part by using a planetary wheel to drive the wheel-rim reducing gear shell and the rear wheel hub. The wheel-rim electric axle is applicable to various large electric passenger cars, achieves high transmission efficiency, omits the transmission case and the transmission shaft, can simultaneously realize the middle-engine rear-drive, and omits the electro-hydraulic controlled articulated driving device and the automatic gearbox. Besides, the invention overcomes the problems that the axle of the existing electric automobile has low transmission efficiency and the hub motor transmission structure can be only used for small cars such as sedans.

Description

Technical field: [0001] The invention relates to a wheel-side electric axle for electric vehicles, belonging to the technical field of motor-driven rear axle assemblies of passenger car chassis. Background technique: [0002] With the shortage and depletion of oil, a non-renewable resource, and the continuous improvement of people's awareness of energy saving, emission reduction and environmental protection, electric vehicles as clean energy have been more and more recognized and valued by people. Electric vehicles are incomparable to fuel vehicles in terms of structure, exhaust emissions and environmental protection. The axle of an electric vehicle is the most critical component of an electric vehicle, which directly affects the transmission efficiency and vehicle performance of the vehicle, and is also directly related to the future and destiny of the electric vehicle. The axles of existing electric vehicles all directly borrow the chassis design form of similar fuel loco...

AI Technical Summary

Problems solved by technology

It overcomes that if the existing electric vehicle axle bumps during driving, it is easy to cause the expansion and contraction of the transmission shaft and the angle change, which reduces the mechanical transmission efficiency; while the direct drive technology of the hub motor is difficult and can only be applied to small vehicles. side electric axle

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