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High-stability drum brake

A drum brake and high stability technology, applied in the direction of mechanically driven drum brakes, etc., can solve the problems of inconsistent friction position, wear, and incomplete use of the braking area of ​​the brake pad, so as to prevent inconsistent braking force and improve stability , the effect of preventing local wear

Inactive Publication Date: 2018-12-18
泸州开士乐工程技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because it is necessary to set the brake pad and the brake drum to be in interference contact, and the brake shoe is pushed by the wheel cylinder, the brake pad rotates around the fulcrum, and the outer surface of the brake pad and the inner wall of the brake drum are not just in contact. When braking, the outer surface of the brake pad near the fulcrum will contact the inner surface of the brake drum first, so the outer surface near the fulcrum will be more worn
With the use of the brake pads, this part is worn thin, and the friction surface is transferred to the part of the brake pads away from the fulcrum, so the braking area of ​​the brake pads is not fully used, and the friction position is inconsistent with time, which leads to braking poor stability

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0017] Such as Figure 1~3 Shown is a preferred embodiment, the drum brake includes brake drum 1, leading shoe 2, slave shoe 3, leading shoe brake pad 4, slave shoe brake pad 5, return spring 6, leading shoe fulcrum 7, slave shoe fulcrum 8, two-way brake wheel cylinder 9; the inner arc surface of the collar shoe brake pad 4 is fixedly connected with the outer arc surface of the collar shoe 2; the braking axis of the collar shoe 2 is connected to the collar shoe 2 The axes of the inner arc surfaces of the shoe brake pads 4 coincide; the inner arc surfaces of the slave shoe brake pads 5 are fixedly connected with the outer arc surfaces of the slave shoes 3; the brake axes of the slave shoes 3 It coincides with the axis of the inner arc surface of the slave shoe brake pad 5; one end of the leading shoe 2 is hinged to the leading shoe fulcrum 7, and the other end is fixed to the piston at one end of the two-way brake wheel cylinder 9 One end of the slave shoe 3 is hinged on the s...

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Abstract

The invention discloses a high-stability drum brake. The axis of the outer arc surface of a leading shoe brake pad of the high-stability drum brake deviates from the axis of the inner arc surface of the leading shoe brake pad, and the radial thickness of the leading shoe brake pad is gradually increased from the end close to a leading shoe fulcrum to the other end. The axis of the outer arc surface of the leading shoe brake pad is located on the center line of the inner arc surface of the leading shoe brake pad. The axis of the outer arc surface of a trailing shoe brake pad deviates from the axis of the inner arc surface of the trailing shoe brake pad, and the radial thickness of the trailing shoe brake pad is gradually increased from the end close to a trailing shoe fulcrum to the other end. The axis of the trailing shoe brake pad is located on the center line of the inner arc surface of the trailing shoe brake pad. The distance between the axis of the outer arc surface of the leadingshoe brake pad and the axis of the inner arc surface of the leading shoe brake pad is d1, the distance between the axis of the outer arc surface of the trailing shoe brake pad and the axis of the inner arc surface of the trailing shoe brake pad is d2, and d1 is larger than d2.

Description

Technical field: [0001] The invention relates to a brake device, in particular to a high-stability drum brake. Background technique: [0002] The brake pad of the drum brake is fixed on the brake shoe, and its working surface is arc-shaped. Through the transmission mechanism, the brake shoes press the brake pads against the inner side of the brake drum, thereby generating braking force and stopping the vehicle. The brake axis of the brake shoe coincides with the axis of the brake drum, one end of the brake shoe is fixed to the fulcrum, and the other end is connected to the brake wheel cylinder. When braking, the wheel cylinder piston pushes the brake shoe to rotate around the fulcrum, so that the brake pad contacts the inner surface of the brake drum, and converts kinetic energy into heat, thereby achieving the braking effect. [0003] Ideally, all outer surfaces of the drum and pad are in full contact with consistent wear everywhere. However, because it is necessary to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D51/22
CPCF16D51/22
Inventor 经廷辉
Owner 泸州开士乐工程技术有限责任公司
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