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A kind of automatic adjustment arm of automobile brake clearance

A technology for automatic adjustment of arms and automobile braking, applied in the field of auto parts, can solve the problems of reducing the sensitivity of large worms, affecting the response speed of large worms, and large frictional resistance, achieving sensitive rotation response, eliminating frictional resistance, and improving adjustment accuracy. Effect

Active Publication Date: 2020-05-22
LONGZHONG HLDG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For example, the Chinese invention patent application (application number: 200610025906.4) discloses an automatic adjusting arm for brake clearance of an automobile, which includes an adjusting arm housing, a large worm gear and a large worm screw that are arranged in the adjusting arm housing and mesh with each other. One end of the large worm in the casing is provided with a thrust spring, the other end is provided with a one-way clutch, and a control arm is provided at the end of the large worm wheel, and a gear ring is fixed on the control arm, and the adjustment arm A small worm is arranged in the housing, and the small worm meshes with the small worm wheel in the one-way clutch. One end of the small worm is fixed with a pinion in the circumferential direction, and the pinion is meshed with the toothed ring. Between the pinion and the small worm There is a spring, and there is a gap between the other end of the small worm and the housing of the adjusting arm. When the adjusting arm rotates in the opposite direction to release the brake, the gear ring can drive the large worm to rotate through the small worm and the clutch, thereby Drive the large worm wheel to rotate to set the angle to adjust the brake clearance. The large worm rotates at a small angle and requires high precision. However, because the large worm compresses the thrust spring during braking, its end face is pressed against the inner wall of the housing, and the The function of the thrust spring in the adjustment arm is to make the end of the large worm mesh with the clutch. Therefore, at the moment when the large worm starts to rotate, the thrust spring cannot push the large worm away in time, resulting in a gap between the large worm and the inner wall of the housing. It has a large frictional resistance, which reduces the sensitivity of the large worm and affects the response speed of the large worm. Furthermore, because one end of the large worm meshes with the large worm wheel and the other end is directly connected to the clutch, that is, there are many parts connected to the large worm. This also leads to greater friction resistance on the large worm, which further affects the sensitivity and corresponding speed of the large worm, thereby reducing the accuracy of brake clearance adjustment

Method used

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  • A kind of automatic adjustment arm of automobile brake clearance
  • A kind of automatic adjustment arm of automobile brake clearance
  • A kind of automatic adjustment arm of automobile brake clearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , figure 2 As shown, an automatic brake gap adjustment arm of an automobile includes a housing 1, a worm gear 2, a worm 3, a transmission shaft 4, a clutch 5, a pinion helical gear 8, a pinion 9 and a ring gear 12. The worm gear 2 is connected to the housing In 1, the worm 3 meshes with the worm wheel 2, and the worm 3 can rotate circumferentially and move axially. The transmission shaft 4 and the worm 3 are arranged coaxially, one end of the transmission shaft 4 is connected with the clutch 5, and the other end of the worm 3 One end is connected, the transmission shaft 4 is circumferentially fixed with the worm 3, and the worm 3 can move axially relative to the transmission shaft 4. The gear ring 12 is fixed on the housing 1, and the gear ring 12 and the worm gear 2 are arranged coaxially, and the pinion 9 is fixed circumferentially with the small helical gear 8, wherein the small gear 9 meshes with the ring gear 12, the clutch 5 includes a large helica...

Embodiment 2

[0035] The structure of the automobile brake gap automatic adjustment arm is basically the same as that of the first embodiment, and the differences are as follows: Figure 5 As shown, the elastic structure 6 includes a columnar polyurethane spring 63 and a ball and socket gasket 62. The polyurethane spring 63 and the ball and socket gasket 62 are arranged in the mounting hole 11, and the polyurethane spring 63 is pressed against the side surface of the ball and socket gasket 62. The abutting portion 621 of the socket gasket 62 is pressed against the end surface of the worm 3.

Embodiment 3

[0037] The structure of the automobile brake gap automatic adjustment arm is basically the same as that of the first embodiment, and the differences are as follows: Image 6 As shown, the elastic structure 6 includes a cylindrical coil spring 64 and a ball and socket gasket 62. The coil spring 64 and the ball and socket gasket 62 are arranged in the mounting hole 11. The coil spring 64 is pressed against the side surface of the ball and socket gasket 62. The abutting portion 621 of the socket gasket 62 is pressed against the end surface of the worm 3.

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PUM

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Abstract

The invention provides an automobile braking gap automatic adjusting arm, belongs to the technical field of automobile parts and solves the problem that existing adjusting arms are low in braking gap adjusting accuracy. The automobile braking gap automatic adjusting arm comprises a shell, a worm gear and a worm are arranged in the shell, the worm is rotatably connected in the shell and can move axially, a step face capable of being abutted against the inner wall of the shell when the shell is in forward rotation for braking is arranged on the worm, a clutch is arranged in the shell, a transmission shaft is rotatably connected in the shell, one end of the transmission shaft is connected with the clutch while the other end of the same is fixedly connected with one end of the worm peripherally, and an elastic structure capable of pushing the worm and enabling the step face of the worm to break away from the inner wall of the shell when the shell is in reverse rotation is arrange in the shell. The automobile braking gap automatic adjusting arm receives lower resistance during braking gap adjusting and is smoother in adjusting and higher in adjusting accuracy.

Description

Technical field [0001] The invention belongs to the technical field of automobile parts and relates to an automatic brake gap adjustment arm for automobiles. Background technique [0002] Automobile brake clearance refers to the clearance that must be maintained between the friction pair (brake drum and brake shoe friction lining or brake disc and brake pad friction lining) in the brake. The brake gap cannot be too small or too large. If the brake gap is too small, it cannot guarantee the complete release of the brake. It is easy to cause brake heating, premature wear of friction linings, and increase vehicle fuel consumption. If the gap is too large, it will increase braking. The stroke of the pedal is inconvenient to operate and extends the braking distance. Since the friction lining of the brake is worn in friction, the brake gap will become larger and larger, so the automobile brake must have a brake gap adjustment device. [0003] For example, a Chinese invention patent appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/62
CPCF16D65/62
Inventor 苏辉罗少卿
Owner LONGZHONG HLDG GRP