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Self-adjusting drum brake at parking

A drum brake and self-adjusting technology, which is applied in the direction of brakes, braking components, and braking action starting devices, can solve problems such as gap compensation, self-adjusting plate fatigue, and shortened service life, so as to improve reliability and Longevity, prevent premature fatigue effect

Inactive Publication Date: 2004-09-15
重庆红宇精密工业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the frequent braking of the vehicle, when the actual gap between the device and the drum is smaller than the design gap, the gap cannot be compensated, and the self-adjusting plate still moves, which makes the self-adjusting plate fatigue prematurely and shortens the service life.

Method used

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  • Self-adjusting drum brake at parking
  • Self-adjusting drum brake at parking

Examples

Experimental program
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Embodiment Construction

[0010] exist figure 1 Among them, the brake wheel cylinder 3, the brake shoe with friction plate assembly 2 are installed on the brake base plate 1, the self-adjusting device assembly 4 is installed in the groove of the brake shoe with friction plate assembly 2, the brake shoe with friction plate assembly 2 The friction plate assembly 2 fixes the brake base plate 1 with a brake shoe pressing mechanism 8 and tightens it with a return spring 9 . Self-adjusting dial 6 is hinged on the pin 5 on a brake shoe, one end hook is hooked on the parking pull arm 7, and the other end hook engages with the ratchet wheel of self-adjusting device assembly 4. Self-adjusting plate is connected with another brake shoe by extension spring 9. During parking, the parking pull arm 7 rotates around the fulcrum under the action of the pull rope force, and the self-adjusting plate 6 is integrated with the parking pull arm 7, and rotates accordingly, and the other end hook of the self-adjusting plate m...

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PUM

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Abstract

The invention relates to a self-adjusting drum brake to halt vehicle, adopting self-adjusting plectrum plate to hinge the bolt, the hook on one end of self-adjusting plectrum plate is hooked on the vehicle-halting draw arm, and the hook head on the other end of self-adjusting plectrum plate and the ratchet wheel of the self-adjusting device assembly are engaged. When halting vehicle, the vehicle-halting draw arm rotates around the pivot under the action of slope drawing force, one end of self-adjusting plectrum plate rotates with the vehicle-halting draw arm, the other end pokes the ratchet wheel to rotate, realizing automatic gap compensation through the screw and screw cover in the self-adjusting device assembly. It heightens reliability and life of the self-adjusting device.

Description

technical field [0001] The invention relates to an automobile drum brake. Specifically, it is a functional drum brake that realizes clearance self-adjustment when parking. Background technique [0002] At present, known drum brakes include a brake base plate, a brake wheel cylinder, a brake shoe with a friction plate assembly, a self-adjusting dial, a self-adjusting device assembly, a return spring, a brake shoe pressing mechanism, and the like. Among them, the usual self-adjusting device is during the braking process, when the gap between the device and the drum is greater than the design gap, the hydraulic pressure of the wheel cylinder pushes the brake shoe, drives the self-adjusting dial, and realizes the automatic adjustment of the gap. However, due to frequent braking, when the actual gap between the device and the drum is smaller than the design gap, the gap cannot be compensated, and the self-adjusting plate still moves, which makes the self-adjusting plate fatigue ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T1/06B60T7/00
Inventor 李祥云曾维刚熊泽伟
Owner 重庆红宇精密工业集团有限公司
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