Tread cleaning device

A tread cleaning and piston technology, which is applied in the direction of brake actuators, slack adjusters, etc., can solve the problems of small total elongation of the piston and cannot meet the use requirements, etc., to reduce the braking response time and achieve stable and reliable working performance Effect

Pending Publication Date: 2021-11-16
CHINA ACADEMY OF RAILWAY SCI CORP LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the total elongation of the tread sweeper piston of the existing product single-piston structure is small, both are 80mm, which cannot meet the use requirements

Method used

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Embodiment Construction

[0051] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0052] Such as Figure 1 to Figure 12 As shown, the present embodiment provides a tread cleaning device, comprising:

[0053] Cylinder 1;

[0054] The first piston 2 with openings at both ends is set in the cylinder body 1, the first end of the first piston 2 is in sealing and sliding connection with the cylinder body 1, and the first piston 2 is sleeved with a first spring 3 and a thrust sleeve 4. The thrust sleeve 4 is axially limited in the cylinder body 1, and the two ends of the first spring 3 are respectively pressed against the first end of the first piston 2 and the thrust sleeve 4; hole 23, and a movable block 24 is embedded in the through hole 23;

[0055] The second piston 5 whose first end closes the opening of the...

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Abstract

The invention discloses a tread cleaning device. The tread cleaning device comprises a cylinder body, a first piston and a second piston, the first end of the first piston is in sealed sliding connection with the cylinder body, the first piston is sleeved with a first spring and a thrust sleeve, a through hole is formed in the first piston, and a movable block is embedded in the through hole. The second piston can penetrate through the first piston in a sealed and sliding mode, a second spring and a spring seat are arranged in the second piston, a second guide hole is formed in the second piston, the spring seat penetrates through the second guide hole and then is fixedly connected with the first piston, and a clamping groove is formed in the second piston. A radial hole is formed in the thrust sleeve, and a thrust piece is arranged in a cavity defined by the radial hole, the cylinder body and the second piston. The thrust piece can push the movable block to move after the second piston axially moves relative to the first piston, so that part of the movable block is clamped in the clamping groove. The tread cleaning device not only has a gap adjusting function, but also can ensure that the braking force change is small when the elongation of the piston is continuously increased.

Description

technical field [0001] The invention relates to the technical field of rail vehicle braking, in particular to a tread cleaning device. Background technique [0002] With the increasing popularity of high-speed EMU vehicles and the continuous increase in the speed of urban rail vehicles, disc brakes are used for vehicle braking. In order to ensure the adhesion coefficient of vehicle wheel treads, some vehicles are equipped with tread cleaning devices. Clean and dry the wheel tread to improve the friction between the wheel and the rail. However, the current tread sweepers have the following problems: [0003] There are existing tread cleaners with a direct push structure. When the wheel tread and brake shoes are new, the brake shoe clearance is small, and the brake shoes will stick to the wheel tread for a short time during braking, resulting in braking effect and braking response. The time is shorter; however, after the wheel tread and the brake shoe are worn at the same ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D65/16F16D65/72
Inventor 赵彦利吕换小焦标强张庆爽李业明王正杰李辉
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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