Electric drive axle capable of conducting central double-acting wet braking

Abstract

The invention discloses an electric drive axle capable of conducting central double-acting wet braking. The electric drive axle comprises a motor, a gearbox and wheel edges, wherein the gearbox is internally provided with a differential mechanism and a wet brake, the motor is fixed on a gearbox shell, the output end of the motor is driven by an I-stage fixed-shaft transmission pair in the gearboxshell, a second-stage fixed-shaft transmission pair and a planetary gear transmission pair to drive a differential gear frame to rotate on the inner wall of the gearbox shell, the differential gear wheel frame is rotationally connected with a differential gear planet wheel, the differential gear planetary gear is meshed with a driving gear on the inner end of a half shaft, the half shaft is coaxially and rotationally connected to the gearbox shell, and the two wheel edges are fixed at the outer end of the half shaft. According to the electric drive axle, the transmission ratio adjustment rangeis wide, the efficiency is high, the maintenance and replacement are more convenient and fast, and the maintenance cost is reduced; and a forced separation mechanism is adopted by the wet brake, so that the overall service life of a sealing element, a friction plate and the brake is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of electric drive axles, in particular to an electric drive axle capable of central double-acting wet braking. Background technique [0002] The drive axle is composed of final drive, differential, wheel drive and drive axle housing. It is to bend the power transmitted by the universal transmission through a 90° angle, change the transmission direction of the force, and reduce the speed by the final reducer, increase the torque, and distribute it to the half shaft and the driving wheel through the differential. [0003] Automobile brakes usually include parking brakes and service brakes. The conventional braking method is usually to brake the two wheels, and a set of brakes can usually only perform one type of braking. The brake utilization efficiency is low, and the brakes are in use After the brake is released, the brake pad and the friction pad cannot be separated in time, which causes problems such as h...

AI Technical Summary

Problems solved by technology

[0003] Automobile brakes usually include parking brakes and service brakes. The conventional braking method is usually to brake the two wheels, and a set of brakes can usually only perform one type of braking. The brake utilization efficiency is low, and the brakes are in use After the brake is released, the brake pad and the friction pad cannot be separated in time, resulting in problems such as high heat generation and low service life of the brake.

[0004] The traditional gearbox usually adopts a four-stage fixed-axis reduction gear train in terms of specific structural design. The transmission output torque of this structure is relatively low, and two single-unit electric double-drive drive axles are often required in one vehicle, and the manufacturing cost is relatively high. The structure is also more complex

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