Improved structure of drum brake

A drum brake and a pair of technology, applied in the field of motorcycle and electric vehicle brake devices, can solve the problems of easy wear and tear of brake cams, large vehicle braking sliding distance, and poor drum braking effect.

Pending Publication Date: 2021-06-18
申革英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an improved structure of the drum brake, which changes the working mode of the original drum brake which uses the cam to directly drive the expansion of the brake shoe, and effectively improves the poor braking effect of the existing drum brake, the large sliding distance of the vehicle brake, and the large braking distance of the brake cam. Disadvantages of

Method used

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Experimental program
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Embodiment

[0007] as attached figure 1 And attached figure 2 As shown, a pair of brake shoes (2) are installed in the casing (1), and one end of the pair of brake shoes (2) has a semicircular arc surface respectively, and is installed on the rotating shaft (3), and can be wound around The rotating shaft (3) rotates, and the rotating shaft (3) is fixedly installed on the housing (1), while the other ends of the pair of brake shoes (2) are respectively made into convex toothed surfaces, and the rack (5) is Installed between the toothed surfaces of the pair of brake shoes (2), the part rocker shaft (601) in the brake rocker arm assembly (6) is shaped on a gear (60101), which forms a gear with the rack (5) The meshing relationship provides power for the movement of the rack (5), and the movement of the rack (5) drives the pair of brake shoes (2) to form an "opening" and "closing" movement, thereby having a braking function.

[0008] Beneficial effect

[0009] The beneficial effect of the...

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Abstract

The invention provides an improved structure of a drum brake. The improved structure is used for changing the original working mode of the drum brake that a brake shoe is directly driven by a cam to expand. According to the structure, a pair of brake shoes is installed in a drum brake shell, one end of each brake shoe is provided with a semicircular arc surface, the brake shoes are installed on a rotating shaft and can rotate around the rotating shaft, and the rotating shaft is fixedly installed on the drum brake shell; the other end of each brake shoe is made into a convex tooth-shaped surface, a rack is installed between the two tooth-shaped surfaces, the rack is meshed with the pair of brake shoes and a rocker arm shaft gear, and the rocker arm shaft gear is a part of the structure of a rocker arm shaft of a brake rocker arm assembly; and when the rocker arm shaft rotates, the pair of brake shoes can be driven to do opening and closing movement, and therefore the braking function is achieved.

Description

technical field [0001] The invention belongs to the technical field of brake devices for motorcycles and electric vehicles. Background technique [0002] Drum brakes have been used as brake components on motorcycles and electric vehicles for nearly a century. Their structure generally consists of a housing, a pair of brake shoes, a brake cam, a brake rocker arm, and elastic reset elements. When braking, the brake rocker arm drives the brake cam to rotate, and the brake cam forces the brake shoe to expand and contact the housing to generate friction and then brake. After braking, rely on the elastic return element to pull the brake shoe back to its original position. During the braking process, in addition to the wear between the brake shoe and the housing, 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 greatly shortens the brake life. In addition, the existing drum ...

Claims

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Application Information

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IPC IPC(8): F16D51/22F16D65/14F16D121/14
CPCF16D51/22F16D65/14F16D2121/14
Inventor 申革英秦巍
Owner 申革英
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