Electronic parking brake

By incorporating a female head structure and sealing elements on the planetary gear mounting plate, the problems of insufficient torque bearing capacity and poor sealing of the planetary gear mounting plate are solved, achieving high torque and high sealing performance, and reducing the production cost of the brake.

CN122305160APending Publication Date: 2026-06-30SHANGHAI WATSON RALLY AUTOMOTIVE TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI WATSON RALLY AUTOMOTIVE TECHNOLOGY CO LTD
Filing Date
2024-12-31
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The powder metallurgy process of the planetary gear mounting disc in the existing brake has limited load-bearing capacity and is easily damaged when the torque is too large. In addition, there are gaps at the connection between the housing and the bracket, which allow dust or water to enter. It is impossible to achieve low-cost production and high dustproof and waterproof effect.

Method used

A female head structure is used to create holes in the planetary gear mounting plate, and a male head structure is used to connect with the lead screw. Combined with the sealing design, including the engagement of the outer sleeve and the sleeve with protrusions and grooves, the sealing effect is improved.

Benefits of technology

The torque capacity of the planetary gear mounting disc was improved, production costs were reduced, and sealing performance was enhanced to prevent dust and water from entering the brake.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122305160A_ABST
    Figure CN122305160A_ABST
Patent Text Reader

Abstract

This invention relates to an electronic parking brake, characterized by comprising: a motor; a transmission device including a planetary gear disk for mounting planetary gears, the planetary gear disk having a female head structure; the transmission device being connected to the motor; an adjustment assembly including a lead screw and a pusher, the lead screw having a male head structure, the lead screw being rotatably mounted; the lead screw and the pusher being threadedly engaged; the lead screw and the intermediate gear being connected via the male and female head structures; a friction pad; the motor driving the lead screw to rotate via the transmission device, and the rotation of the lead screw driving the friction pad to move linearly via the pusher. In this invention, the electronic parking brake sets the female head structure on the planetary gear mounting disk and the male head structure on the lead screw. Because the female head structure has a hole on the planetary gear mounting disk, unlike the male head structure which requires a protruding rod on the mounting disk, the planetary gear mounting disk can withstand greater torque. Therefore, within the tolerable torque limit, the planetary gear mounting disk can be produced using powder metallurgy, reducing production costs.
Need to check novelty before this filing date? Find Prior Art