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Actuator and self-locking mechanism of electric parking system

A self-locking and driven wheel technology, applied in the direction of brake actuators, brakes, gear shifting mechanisms, etc., can solve the problems of low transmission efficiency, inability to self-lock, easy to slip, etc., to avoid friction, high transmission efficiency, Low friction effect

Active Publication Date: 2019-07-09
JOHNSON ELECTRIC SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transmission efficiency of the screw drive is low, and the use of the ball screw drive can improve the transmission efficiency, but it cannot self-lock after braking, and the car is prone to slip after braking, especially on roads with a certain slope.

Method used

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  • Actuator and self-locking mechanism of electric parking system
  • Actuator and self-locking mechanism of electric parking system
  • Actuator and self-locking mechanism of electric parking system

Examples

Experimental program
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Embodiment Construction

[0018] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] Such as figure 1 , figure 2 and image 3 As shown, the actuator of the electric parking system of the present invention includes a housing 10 , a motor 20 accommodated in the housing 10 , and a transmission device 30 connected to the motor 20 .

[0020] The housing 10 includes a housing base 12 and an end cover 14 connected to the housing base 12 , the end cover 14 and the housing base 12 together form an accommodation space for accommodating the motor 20 and the transmission device 30 . The motor 20 includes a rotating shaft 22, and the transmission device 30 is connected to the rotating shaft 22. When the motor 20 is started, the rotating shaft 22 rotates thereupon, driving the transmission device 30 to run, and the brake is driven to move through the output member 79 to realize braking; , the transmission device 30 can realiz...

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PUM

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Abstract

The present invention provides a self-locking mechanism, especially, but not exclusively, suitable for use in an electric parking braking system and suitable for an electric parking braking system incorporating a self-locking mechanism. The self-locking mechanism has a driving member (52), a driven member (54), a stationary member (80), a lock holder (56) and multiple lock elements (564). The lock holder encircles the driving member and the driven member. The lock holder has a support base (562) and ribs (563) extending from the support base. A lock element (564) is coupled to the axial end portion of each of the ribs (563). The lock elements are radially positioned between the radial outer surface of the driven member (54) and the inner wall of the stationary member (80). A distance between the radial outer surface and the inner wall gradually decreases from a center toward opposite circumferential sides. The maximum distance between the radial outer surface and the inner wall is greater than the diameter of the lock element, and the minimum distance is smaller than the diameter of the lock element.

Description

technical field [0001] The invention relates to a parking system of an automobile, in particular to an actuator of the electric parking system and a self-locking mechanism used therein. Background technique [0002] The parking system of a car is used to prevent the stopped vehicle from slipping. The traditional parking system is manually operated, commonly known as "handbrake". [0003] With the development of technology, the electric parking system (EPB, Electrical Park Brake) gradually replaces the traditional mechanical hand brake. The existing EPB system includes an actuator driven by a motor and a brake installed on a car wheel. The actuator Driven by lead screw or ball screw, when braking, the driver only needs to press the electric brake button to start the motor, and the action of the actuator makes the lead screw or ball screw rotate, driving the brake to move Realize braking. However, the transmission efficiency of the screw drive is low, and the use of the ball...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H63/34
CPCF16D65/14B60T13/741F16D41/067F16D2121/24F16D2125/48F16D2127/06
Inventor 张远春齐发云聂金安秦锐锋
Owner JOHNSON ELECTRIC SHENZHEN