Linkage outer expansion type drum brake

Abstract

The invention relates to a drum brake, in particular to a linkage outer expansion type drum brake, which solves the problems of unreliable braking, a long braking distance, unsafe running and frequent replacement of friction plates in the conventional brake. The linkage outer expansion type drum brake comprises a brake disc, an upper brake shoe, a lower brake shoe, a friction plate and a brake drum, wherein the upper brake shoe and the lower brake shoe are connected with an eccentric backing pin or a backing pin; a return spring is arranged between the upper brake shoe and the lower brake shoe; the brake drum is arranged on each bridge output shaft; an upper eccentric shaft sleeve is sleeved between a sleeve hole at one end of the upper brake shoe and the eccentric backing pin or the backing pin, and a lower eccentric shaft sleeve is sleeved between a sleeve hole at one end of the lower brake shoe and the eccentric backing pin or the backing pin; the upper eccentric shaft sleeve and the lower eccentric shaft sleeve are respectively fixedly provided with an upper linkage plate and a lower linkage plate; a synchronous transfer case which performs synchronous operation with a cam shaft or a hydraulic sub-pump is arranged at the tail ends of the upper and lower linkage plates; and small return springs are arranged between the upper and lower linkage plates and the brake shoes. Thelinkage outer expansion type drum brake enhances the braking effect, shortens the braking distance, improves the safety performance of vehicles in the running process, reduces traffic accidents, and has a wide application range.

Description

technical field [0001] The invention relates to a drum brake used in automobiles, in particular to a linkage outward expansion drum brake. Background technique [0002] Commonly known as brakes, brakes are divided into external expansion type, internal embrace type, butterfly type, etc. in terms of working principle. The braking system is divided into air pressure type, hydraulic pressure type, mechanical type, etc. Brakes are mainly used on vehicles. The safety device, the vehicle relies on the brakes to slow down and stop while driving, is an indispensable part of the vehicle in its manufacture and use. [0003] At present, the main configurations of automobiles during manufacture are outwardly expanding drum brakes and butterfly brakes. Among them, outwardly expanding drum brakes are mainly used on various loaded vehicles and various small vehicles. The effect of braking is relatively ideal, but after the vehicle is fully loaded with goods, if emergency braking is adopte...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of unreliable braking, long braking distance, unsafe driving and frequent replacement of friction plates in the existing outward expansion drum brake, the present invention provides a linkage outward expansion drum brake

Images