Band type parking brake cylinder of vehicle

Abstract

The invention discloses a band type parking brake cylinder of a vehicle. The band type parking brake cylinder comprises a unit brake cylinder and a parking cylinder, wherein the unit brake cylinder comprises a brake cylinder body, a middle body, a brake piston assembly, a brake modulating mechanism and a yoke, wherein the brake modulating mechanism comprises a regulating shaft, a guide nut assembly, a resistance regulating assembly and a regulating nut assembly; the resistance regulating assembly comprises a resistance regulating guide base, a resistance regulating gasket and a resistance regulating spring; the parking brake cylinder comprises a parking cylinder body, a parking piston assembly and a parking control mechanism; the parking piston assembly comprises a parking piston, a parking energy storage spring, a parking screw, a parking thread sleeve, a lower spring base and a ratchet wheel; and the parking control mechanism comprises a wedge-shaped body and a thrust sleeve. The band type parking brake cylinder is reliable in brake performance, can avoid the occurrence of a phenomenon that a gap between a brake pad and a brake disc is reduced due to the fact that a lever is elastically deformed to trigger the brake modulating mechanism to generate gap regulation; and moreover, parking brake force is relatively great, so that number of parking cylinders used in the whole vehicle is reduced.

Description

technical field [0001] The invention relates to a vehicle with a parking brake cylinder. Background technique [0002] With parking base brake system for rail vehicle braking, including brake calipers, brake cylinder with parking unit, brake disc and brake pads, with parking unit brake cylinder including unit brake cylinder and parking cylinder, with parking The unit brake cylinder is mounted on one end of the brake caliper. The utility model of Chinese application number 201220312267.0 discloses an energy-storage parking unit brake cylinder, which includes two parts, the unit brake cylinder and the parking cylinder. The brake piston includes a piston body and a piston tube that cooperate with the inner wall of the brake cylinder. One end of the moving cylinder body is fixedly connected with an intermediate body, and there is a relief spring between the intermediate body and the brake piston. The outer circumference of the piston tube is slidably matched with the inner wall...

AI Technical Summary

Problems solved by technology

Since the gap between the brake disc and the brake disc of the brake caliper will increase due to wear, the gap between the brake disc and the brake disc of the above-mentioned unit brake cylinder will be automatically adjusted during the braking process, but the above-mentioned The unit brake cylinder will cause the adjustment shaft to exert a large force on the lever due to the large braking force during the braking process. The elastic deformation of the lever will increase the outward extension of the adjustment shaft. Automatic clearance adjustment, which results in a smaller clearance between the pad and disc

The above-mentioned parking cylinder does not have an amplification mechanism, the parking braking force is relatively small, and it occupies a large space in the lateral direction

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