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Improved drum brake structure

A drum brake and elastic reset structure technology, applied in the direction of brake actuators, mechanically driven drum brakes, etc., can solve the problems of poor braking effect of drum brakes, large sliding distance of vehicle braking, etc., to achieve enhanced braking effect, Improved braking stability and reduced wear

Active Publication Date: 2012-01-04
CHANGXING HUAYI ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide an improved structure of the drum brake, which changes the working mode of the original drum brake that uses the cam to directly drive the expansion of the brake shoe, and effectively improves the existing problems of poor braking effect of the existing drum brake and large braking distance of the vehicle. shortcoming

Method used

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Embodiment Construction

[0022] refer to Figure 2-3 , an improved drum brake structure, including a housing 1, a pair of brake shoes 2 arranged in the housing 1, a reset element 3 connected between the pair of brake shoes 2 and a brake arm assembly, the pair of brake shoes 2 One end of the pair of brake shoes 2 is rotated and positioned in the housing 1. A brake wheel 7 driven by the brake arm assembly is provided between the end gaps at the other end of the pair of brake shoes 2. The brake wheel 7 and the end surfaces of the brake shoes 2 on both sides are respectively There are rollers 71 abutted against, and positioning plates 50 are arranged on both ends of the brake wheel 7 in the axial direction, and the rollers 71 are rotatably positioned between the two positioning plates 50. The end face of the sheet 2 fits against the limiting edge surface of the roller 71, and the two ends of the roller 71 are provided with an axially protruding rotating pin 711, and the positioning plate 50 is provided wi...

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Abstract

The invention discloses an improved drum brake structure which comprises a shell, a pair of brake shoes arranged in the shell, a resetting element and a brake arm assembly, wherein the resetting element is connected with the pair of brake shoes; one end of each brake shoe is rotatably positioned in the shell, and a gap between the other ends of the brake shoes is provided with a brake wheel driven to rotate by the brake arm assembly; a pin roller is respectively abutted and connected between the brake wheel and the end surfaces of the brake shoes on two sides; locating plates are arranged on the two axial end surfaces of the brake wheel, and the pin roller is rotatably positioned between the two locating plates; the edge of the brake wheel is provided with a limiting edge face which is matched with the end surface of the brake shoes to be abutted with the pin roller; and a rolling meshing structure is arranged between the limiting edge face and the pin roller. According to the improved structure provided by the invention, the phenomenon that the original drum brake adopts the working mode of directly driving the brake shoes to expand by a cam is changed, and the shortages of poor brake effect and long vehicle brake sliding distance of the existing drum brake can be effectively improved.

Description

technical field [0001] The invention relates to a drum brake. Background technique [0002] Drum brakes have been used in automobiles for nearly a century, but due to their reliability and powerful braking force, drum brakes are still used on many models today. Such as figure 1 As shown, most of the existing drum brakes are mainly composed of a housing 01, a pair of brake shoes 02, a brake cam 05, a brake rocker arm 03 and a reset part 04. When braking, the brake rocker arm drives the brake cam to rotate, and the brake cam forces the brake shoe 02 to expand and contact the housing 01 to generate friction to achieve braking. After braking, the reset component pulls the brake shoe 02 back to its original position. During the braking process, in addition to the wear between the brake shoe 02 and the housing 01, there will also be wear between the brake cam and the brake shoe, and the wear is always concentrated on several points or surfaces of the brake cam, which is extremel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22F16D65/18
Inventor 许志明许文涛
Owner CHANGXING HUAYI ELECTROMECHANICAL
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