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Single-anchor pin cam drum type brake

A technology for drum brakes and support pins, which is applied in the field of auto parts, can solve the problems of complex structures of two support pins, and achieve the effects of optimizing shape, not easy to run off, and reducing the number of parts

Inactive Publication Date: 2009-07-29
HUNAN YUNDA MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the traditional brake design of two supporting pins with complex structures, the present invention proposes a new technical solution for a single supporting pin cam drum brake

Method used

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  • Single-anchor pin cam drum type brake
  • Single-anchor pin cam drum type brake

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail as follows:

[0015] exist figure 1 Among them, the brake of the present invention includes a circular base plate 1, a dust cover 3 fixed on the circumference of the base plate 1, and a brake shoe 2. There are two brake shoes 2, which are semicircular and symmetrically arranged, and are fixed on the base plate 1. There is a support pin 6, and there is a semicircular notch at one end of the brake shoe 2, and the notch is stuck on the support pin 6, and the two brake shoes 2 share a support pin 6, and the other end of the brake shoe 2, that is, the movable end, passes through The pin holes are fixed with rollers, the bottom plate 1 in the middle of the rollers is fixed with a camshaft 7, the camshaft 7 is fixed with a cam, the cam contacts with the rollers, and a return spring 4 is installed between the two brake shoes 2 and the fixed spring 5, on the ou...

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Abstract

A single rest pin cam drum brake mainly comprises a bottom plate of the brake, two brake shoes, a dust cover, a return spring, a fixed spring, a rest pin and a camshaft. The center of the rest pin is arranged on the extension line of the line of centers of the camshaft and the bottom plate of the brake. The supported end of the brake shoe adopts a double subplate riding tractor single rest pin structure. One end of the brake shoe is supported on the rest pin in a semicircle and nick way. The two brake shoes share one rest pin. The other end of the brake shoe is provided with a roller which is connected with the cam. The excircle of every brake shoe is fixed with two friction liners. The single rest pin drum brake has the advantages that the two brake shoes share one rest pin, which reduces the quantity of parts and the material weight of the bottom plate of the brake and the brake shoes and simplifies the processing technique of the bottom plate of the brake; in addition, the shape of the friction liners is optimized to cause the contact line of the friction liners and the cylindrical surface in the brake drum to be a cylindrical helix, thus brake being more stable and difficult to off tracking.

Description

【Technical field】 [0001] The present invention relates to an automotive component, namely a single pin cam drum brake. 【Background technique】 [0002] The cam drum brake widely used in China is composed of brake base plate, brake shoe, friction lining, brake shoe support pin, return spring, camshaft, dust cover and other components. The underpin is fixed to the brake base plate. The structure of this brake has not changed much over the years, the structure is more complicated, and the manufacturing cost is higher. 【Content of invention】 [0003] In order to overcome the shortcomings of the traditional brake design of two supporting pins with complex structures, the present invention proposes a new technical proposal of a single supporting pin cam drum brake. [0004] This single support pin cam drum brake is mainly composed of a base plate of the brake, two brake shoes, a dust cover, a return spring, a fixed spring, a support pin and a camshaft. It is characterized in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22F16D69/00F16D65/08
Inventor 杨孚俊周朝善高景峰熊继远沈小华
Owner HUNAN YUNDA MACHINERY MFG
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