parking brake

Abstract

The invention provides a parking braking device, comprising: a housing; a gear part installed inside the housing and driven by a motor to rotate; a nut part connected to the gear part and driven by the rotating gear part to rotate; penetrating through the inside of the nut part and connected to the nut part-bonded, bolt that moves lengthwise within the nut part driven by the rotating nut part; cable attached to the bolt; mounted inside the housing with a slider that moves, one side connected to the cable and the other side a piston part extending to the nut part; an elastic member located between the housing inner wall and the piston part and elastically deformed based on the movement of the piston part slider. When the brake stops working, the invention compensates for the gap between the annular connection part and the operating rod, so as to prevent the decrease of the braking power. The invention provides pulling force to the cable through the elastic member, compensates the gap between the circular ring connecting part and the operating rod, and prevents the part from being damaged due to excessive pulling force applied to the cable.

Description

technical field [0001] The invention relates to a parking brake device, in particular to a parking brake device which compensates the gap between components to prevent the decrease of braking power when the brake stops working. Background technique [0002] Typically, people use a parking brake to prevent a parked vehicle from moving. Electronic Parking Brake (EPB, Electronic Parking Brake) converts the rotational motion of the motor into linear motion and transmits braking power to the wheels. [0003] That is, the electronic parking brake device drives the motor by operating the button, switch or lever, the gear part and the nut part are rotated by the rotating motor, the bolt penetrates the nut and moves along the length direction, and then pulls the cable connected to the nut, Generate braking power. [0004] In general, the electronic parking brake device driven by a motor will shrink due to the position and temperature of the operating lever after the vehicle brake i...

AI Technical Summary

Problems solved by technology

[0004] In general, the electronic parking brake device driven by a motor will shrink due to the position and temperature of the operating lever after the vehicle brake is activated, and thus cannot compensate for the gap between the operating lever and the ring-shaped connecting part connected by the cable. gap

[0005] If an additional operating force is applied to the cable to compensate for the gap between the operating lever and the ring-shaped connecting member, problems such as damage to the parking brake device or increase in product unit price may occur, or the friction member may shrink due to a drop in temperature after parking , which in turn produces problems such as reduced braking power, so there is a need to improve the above problems

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