Electronic parking actuator for electronic parking brake system of motor vehicle

Abstract

The invention discloses an electronic parking actuator for a parking brake system of a motor vehicle. The electronic parking actuator is characterized by comprising a shell, a motor and accessories thereof, a transmission mechanism from a motor shaft to a main shaft of a planetary gear, a large transmission part, a positioning device and a planetary gear mechanism, wherein the transmission mechanism from the motor shaft to the main shaft of the planetary gear is connected with the large transmission part; the large transmission part is positioned and arranged on the positioning device through a positioning pin; the positioning device is provided with a wear-resistant part; the wear-resistant part is a sliding washer or an insert which is made of a metal material; and the axial wear to the transmission part matched with the sliding washer or the insert is reduced by the sliding washer or the insert. The problems of low efficiency and serious wear on a matching part of the positioning device and the transmission part in a thickening scheme in the prior art are solved; and in addition, the electronic parking actuator also has the advantage of high stability.

Description

technical field [0001] The invention is applied to a motor vehicle electronic parking brake system, and belongs to the technical field of design and manufacture of components of a motor vehicle parking brake system. The motor vehicle includes but is not limited to a motor vehicle driven by an internal combustion engine, an electric vehicle driven by a motor, and Hybrid vehicles and the like, and more particularly, the present invention relates to an electronic parking actuator for a parking brake system of a motor vehicle. Background technique [0002] At present, in the technical field of electronic parking brake systems for motor vehicles, most of the electronic parking brake systems with integrated rear caliper are used. The integrated electronic parking brake system with rear caliper has many functions, is easy to install and has a compact structure. development trend. The power of the rear caliper integrated electronic parking brake system comes from the motor, passes ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, the non-wear-resistant plastic on the positioning device and the high-wear-resistant material of the rotating parts do not match in terms of service life, which not only causes a relatively large mutual friction coefficient, but also reduces the efficiency of the entire actuator , also caused low actuator efficiency and severe wear of the positioning device, resulting in poor stability of the entire actuator, reduced service life, reduced safety factor and other technical problems, thus providing a parking brake for motor vehicles Electronic parking actuator for the system

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