A new energy vehicle wheel side motor drive axle

Abstract

The invention relates to the field of new energy automobiles, in particular to a wheel motor drive axle of a new energy automobile. The wheel motor drive axle comprises a cross beam assembly, and wheel motor driving systems horizontally and symmetrically arranged at the two sides of the cross beam assembly, wherein each wheel motor driving system comprises a driving motor assembly, a first-stage speed reducer assembly, a second-stage speed reducer assembly, a wheel hub assembly, a hydraulic brake assembly and a parking brake assembly; and hydraulic brakes are arranged on shells or axle shaft sleeves of the first-stage speed reducer assemblies of the wheel motor driving systems and fit brake discs arranged on wheel hubs for realizing hydraulic braking of the wheel hubs, so that the braking response is quick and the braking noise is low. Thus, the wheel motor drive axle can satisfy the braking requirements of a light top-grade passenger car. A hydraulic braking mode is adopted, so that the whole drive axle is compact in structure and is small in occupied space.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a new energy vehicle wheel motor drive axle. Background technique [0002] With the gradual withering of oil resources and the gradual increase of air pollution, the society is increasingly calling for new energy vehicles, including pure electric, hybrid, plug-in, fuel cell and other forms of vehicles. New energy vehicles greatly reduce the impact on Oil dependence and air pollution. Compared with traditional internal combustion engine vehicles, new energy vehicles have undergone tremendous changes in both the general layout of the vehicle and the drive system assembly due to the different forms of energy supply. The drive system assembly is crucial to the vehicle. Important, it not only undertakes the carrying function and driving function, but also directly determines the safety and comfort performance of the vehicle. [0003] At present, the structure of most new energy ve...

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Problems solved by technology

[0003] At present, the structure of most new energy vehicle drive systems is that the central motor is connected to a traditional rear axle through the transmission shaft. This way of transmission efficiency is poor and the system is complicated. However, the drive axle structure of wheel motors has become a research topic at home and abroad. Important direction, the drive axle of this structure generally includes the drive motor, reducer mechanism, wheel hub and other components, instead of the engine, clutch, gearbox, drive shaft, differential, wheel hub assembly and other components, which simplifies the overall mechanism and improves transmission efficiency

[0004] However, most of the existing foreign wheel-side motor drive axles are heavy-duty axles suitable for vehicles with a load of more than eight tons, and the scope of application is relatively narrow. The brakes used are air brakes. The braking time is longer, the braking noise is louder, and it is difficult to meet the low-noise requirements of light-duty high-end passenger cars, and the existing wheel-side motor drive axle has a large change in structure compared with the traditional drive system, and the traditional parking brake The installation method cannot be applied to the existing wheel side motor drive axle, so the existing wheel side motor drive axle lacks a parking brake so that its overall braking efficiency is relatively low

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