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Pawl and guide hole for automatic automobile braking clearance adjusting arm

A technology for automatic adjustment of arms and automobile brakes, applied in the direction of slack adjusters, etc., can solve the problems of asymmetric guide holes up and down, high production cost of pawls, uneven force on punches, etc. The effect of low cost and convenient processing

Inactive Publication Date: 2012-05-23
ZHEJIANG ROADAGE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The matching part of the guide hole and the body 3 1c is larger than the shape of the body 3 1c. Although changing the shape is convenient for processing, the guide hole of this shape is asymmetrical up and down.
Therefore, when stamping, the punch will experience uneven force, resulting in the inclination of the processed guide hole and the problem of low precision.
[0005] Figure 4 It is a cross-sectional schematic diagram of another pawl, which is the technical solution of the above-mentioned brake 1 gap automatic adjustment arm [public number CN1369655A]. The pawl and figure 2 In comparison, body 3 1c can be completely matched with the guide hole, which improves the stability of the pawl's axial movement and axial fixation, but there is still a mold wear that is greater than that when processing the corner 1d of body 2 1b and body 3 1c In the case of other parts, the service life of the mold is short, and the production cost of the pawl is high.

Method used

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  • Pawl and guide hole for automatic automobile braking clearance adjusting arm
  • Pawl and guide hole for automatic automobile braking clearance adjusting arm
  • Pawl and guide hole for automatic automobile braking clearance adjusting arm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the automatic adjustment arm of the automobile brake 1 gap includes a housing 2, in which a worm and gear transmission pair 3 and a ratchet 1 and a ratchet 4 that cooperate with each other are arranged, and one end of the ratchet 4 is connected to the worm and is a flower. The other end passes through the casing 2 and is connected with a coupling sleeve 10, and the coupling sleeve 10 is hinged on the casing 2. The housing 2 has a guide hole 9 communicating with the inner cavity of the housing 2. The pawl 1 includes a cylindrical body 1h and a limiter 1e fixed on the outer surface of the body 1h. The pawl 1 is set in the guide hole. 9 and matches with the guide hole 9, so the pawl 1 can slide axially along the side wall of the guide hole 9 in the guide hole 9 but cannot rotate circumferentially. Also be provided with spring 6 in guide hole 9, the outer port place of guide hole 9 is connected with end cover 7 by screw thread, and the two ends ...

Embodiment 2

[0044] Such as Figure 8 and Figure 9 As shown, the structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference lies in: the limiting body 1e is evenly distributed on the outer surface of the main body 1h, and two of the four limiting bodies 1e are in phase with each other. The angle α in the adjacent limiting body 1e is slightly larger than the angle α in the other two limiting bodies 1e.

Embodiment 3

[0046] Such as Figure 10 and Figure 11 As shown, the structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference lies in: the number of limiting bodies 1e is two, and they are evenly distributed on the outer surface of the main body 1h, and the two limiting bodies The line connecting the outer corners of 1e deviates from the center of the body 1h.

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Abstract

The invention provides a pawl and a guide hole for an automatic automobile braking clearance adjusting arm, which belong to the technical field of mechanical engineering, and solve the problems that the prior pawl and the guide hole are not easy to process and have low machining precision. In the pawl and the guide hole for the automatic automobile braking clearance adjusting arm, the pawl comprises a body and a limit body which is fixedly connected to the body, connected with the body to form a whole and used for preventing the body from rotating in the circumferential direction; the body ofthe pawl is columned, and the limit body has two externally-tangent lateral surfaces tangent with the outer lateral surfaces of the columned body; the guide hole comprises a guide part and a hole body as the same as the body of the pawl; and the guide part has the same shape as the limit body, and the limit body is matched with the guide part. The pawl for the automatic automobile braking clearance adjusting arm has the advantages of error assembly prevention, convenient machining and low production cost; the guide hole has the advantage of high machining precision; and the pawl and the guidehole are matched and have the advantages of precise match and stable and flexible slide.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and relates to a brake, in particular to a pawl and a guide hole of an automatic adjustment arm of a brake gap of an automobile. Background technique [0002] Automobile brakes are one of the important parts of automobiles, and the automobiles often need to use the brakes frequently during driving. The gap between the brake shoe on the brake and the brake drum gradually increases due to wear, resulting in braking lag, deviation, long braking distance, and inconsistent braking. The brake adjustment arm on the brake is an important part used to adjust the clearance of the brake shoe. [0003] At present, brake adjustment arms are divided into automatic adjustment arms and manual adjustment arms, and there are thousands of auto brake adjustment arms in international circulation. For example, the Chinese patent literature once disclosed a patent called the brake gap automatic adjustm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/58
Inventor 林学贤
Owner ZHEJIANG ROADAGE MACHINERY