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A clearance self-adjusting drum brake

A drum brake and self-adjusting technology, applied in slack adjusters, brake drums, etc., can solve problems such as difficulty in ensuring timeliness and accuracy, and increasing labor costs and vehicle use time.

Active Publication Date: 2020-03-10
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fixed end of the drum brake shoe is often positioned by means of support pins or bosses, and the clearance adjustment method is often manually adjusted. When adjusting the brake clearance manually, it is difficult to ensure timeliness and accuracy, especially Consistency between individual brakes, additionally increasing labor costs and reducing vehicle usage time

Method used

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  • A clearance self-adjusting drum brake
  • A clearance self-adjusting drum brake

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] Reference attached figure 1 And attached figure 2 , an embodiment of the present invention will be described in detail.

[0018] Such as figure 1 As shown, a gap self-adjusting drum brake includes a support pin 4 fixedly installed on the brake base plate, an eccentric bush 8 sleeved on the support pin 4, a ratchet 6 processed on the eccentric bush 8, installed The ratchet 7 on the brake base plate meshes with the ratchet 6 under the action of the ratchet spring 5 , the shaft hole at the fixed end of the brake shoe 3 cooperates with the eccentric bushing 8 , and the friction plate 2 is installed on the brake shoe 3 .

[0019] When the brake is working, the actuating element of the braking system makes the brake shoe 3 open, and the friction force between the eccentric bushing 8 and the brake shoe 3 is greater than that between the eccentric bushing 8 and the support pin 4, so , The brake shoe 3 and the eccentric bushing 8 rotate around the center of the support pin 4...

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PUM

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Abstract

The invention relates to a clearance self adjusting type drum brake. The clearance self adjusting type drum brake comprises a braking shoe, a supporting pin, an eccentric lining, a ratchet-pawl mechanism and the like. The fixing end of the braking shoe is installed on a braking bottom plate through the supporting pin and the eccentric lining. A promoting element of the braking system drives the braking shoe to stretch open and press on a braking drum, and the efficient braking effect is achieved. Braking is released, and when the braking shoe backwards rotate to return to the position, automatic adjustment of the braking clearance of the fixing end is achieved through rotation of the ratchet-pawl mechanism and the eccentric lining. The clearance self adjusting type drum brake is simple instructure, reliable in work and high in braking efficiency, the braking clearance of the fixing end of the braking shoe can be automatically adjusted, and the influences caused by abrasion of a friction plate are compensated.

Description

technical field [0001] The invention relates to the field of brakes, in particular to a drum brake, which can realize automatic adjustment of the braking clearance of the brake at the fixed end of the brake shoe, in particular to a clearance self-adjusting type drum brake. Background technique [0002] Automobile braking system includes energy supply device, control device, transmission device and brake. At present, the brakes used in automobiles mainly include disc brakes and drum brakes. These brakes gradually reduce the speed of the car through friction to achieve deceleration or parking. During the use of the brakes, the friction linings are worn due to friction, and the braking clearance of the brakes gradually increases. Changes in the braking clearance and various The unevenness of the brake clearance of the wheel will cause the decline of the braking performance of the car and bring certain safety hazards. Therefore, adjusting the braking clearance of the brake to k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/10F16D65/58
CPCF16D65/10F16D65/58
Inventor 董颖常占辉
Owner ZHEJIANG NORMAL UNIVERSITY