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Asymmetrical cam type brake

An asymmetric, cam-type technology, applied in the direction of mechanically driven drum brakes, brake actuators, gear shifting mechanisms, etc. Braking effect, easy maintenance effect

Inactive Publication Date: 2013-01-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing improved designs either increase the complexity of the structure, or cannot brake in both directions

Method used

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  • Asymmetrical cam type brake
  • Asymmetrical cam type brake
  • Asymmetrical cam type brake

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be further described below in conjunction with drawings and embodiments.

[0015] Such as figure 1 As shown, the present invention comprises brake drum 7, left brake shoe 3 and right brake shoe 4; 3 and the right brake shoe 4 top both sides by return spring 6 tension leaning against upper, lower, left and right all symmetrical " 8-shaped " cam both sides, " 8-shaped " cam is hinged with support dish top by hinge point. When braking, the action point of the "figure 8" cam on the left brake shoe 3 and the right brake shoe 4 is asymmetrical, that is, the action point of the "figure 8" cam 2 on the left brake shoe 2 is on the top or bottom, and on the right brake shoe 2. The action point of moving hoof 4 is down or up.

[0016] Such as figure 2 , image 3 , Figure 4 As shown, when the brake drum 7 rotates in the clockwise direction, the right brake shoe 2 increases force automatically, and the left brake shoe 3 decreases force automatically...

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PUM

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Abstract

The invention discloses an asymmetrical cam type brake. The asymmetrical cam type brake comprises a brake drum, a left brake shoe and a right brake shoe, wherein the left brake shoe and the right brake shoe are hinged with the bottom of a bracket disc through a hinge point at the bottom of the brake; the two sides of the upper parts of the left brake shoe and the right brake shoe are tensioned by a return spring and are pressed against the two side surfaces of a cam; the cam is hinged with the upper part of the bracket disc through the hinge point and has a shape of an 8 character which is symmetrical from top to bottom and from left to right; and in the braking process, acting points of the 8-shaped cam on the left brake shoe and the right brake shoe are asymmetrical, namely the acting points of the 8-shaped cam on the left brake shoe are positioned on the upper side or the lower side, and the acting points of the 8-shaped cam on the right brake shoe are positioned on the lower side or the upper side. Compared with the prior art, the asymmetrical cam type brake fulfills the aims of uniformly abrading the brake shoes, improving braking effects and realizing bidirectional braking through a simple structure and has the advantages of low cost, simple structure, convenience in maintenance and the like.

Description

technical field [0001] The invention relates to a cam brake, in particular to an asymmetrical cam brake which can improve the condition of uneven wear of linings on both sides. Background technique [0002] The brake shoes of ordinary cam brakes are divided into leading shoes and following shoes. In the context of the mirror-symmetric motion of the brake shoe, the friction force of the brake shoe against the brake drum does not satisfy the mirror symmetry (one side goes down and the other side goes up). When braking, the leading shoe increases force by itself, and the secondary shoe reduces force by itself, so that the pressing force of the brake shoe on the brake drum is not equal, so the wear degree of the two brake shoes is not the same, which affects the braking effect. Patents such as CN102022460A, CN202099000U, and 200720080245.5 all relate to the improved design of the cam brake that makes the brake shoes wear evenly. However, the existing improved designs either in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22F16D65/14F16D121/14F16D125/28
Inventor 冯培恩刘瑞文邱清盈曾令斌熊剑波
Owner ZHEJIANG UNIV