Wet multi-disc parking brake

A parking brake and brake technology, which is applied to hydraulic brakes, brake actuators, etc., can solve the problems of cumbersome replacement and maintenance of friction plates, difficulty in entering oil between friction pairs, wear of friction plates, etc. The effect of preventing dry friction and improving braking torque

Inactive Publication Date: 2014-07-09
CRRC QISHUYAN INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the replacement and maintenance of the friction plate are relatively cumbersome.
[0004] Chinese Invention Patent CN201210109599.3 and Chinese Utility Model Patent CN2

Method used

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  • Wet multi-disc parking brake
  • Wet multi-disc parking brake
  • Wet multi-disc parking brake

Examples

Experimental program
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Effect test

Example Embodiment

[0027] Such as figure 1 , 2 3, the wet multi-disc parking brake of the present invention includes a brake cover 1, a brake housing 2, a piston 3, a friction pair 4, a spring 5, a spline shaft 6 and a seal 7.

[0028] The brake cover 1 and the brake housing 2 are fixedly connected to form a brake box. The piston cylinder enclosed by the brake cover 1 and the brake housing 2 is equipped with a piston 3 that can move left and right.

[0029] The piston cylinder includes a first cylinder hole 11 with a larger diameter and a second cylinder hole 12 with a smaller diameter. The piston 3 has a first sliding surface 3-1 with a larger diameter and a second sliding surface with a smaller diameter. 3-2, the first sliding surface 3-1 of the piston 3 slidingly fits with the hole wall of the first cylinder hole 11, and the second sliding surface 3-2 sliding fits with the hole wall of the second cylinder hole 12,

[0030] The brake cover 1 has a plurality of spring mounting holes 1-1, and springs ...

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Abstract

The invention discloses a wet multi-disc parking brake which comprises a brake cover, a brake shell, a piston, a friction pair, a spring, a spline shaft, a sealing element and a retainer ring. The piston is mounted in a piston cylinder encircled by the brake cover and the brake shell, the piston cylinder comprises a first cylinder hole with a large diameter and a second cylinder hole with a small diameter, the piston is provided with a first sliding surface with a large diameter and a second sliding surface with a small diameter, the first sliding surface is in slide fit with the wall of the first cylinder hole, the second sliding surface is in slide fit with the wall of the second cylinder hole, the spring on the brake cover is butted to the back of the piston, the friction pair comprises friction discs and dual discs, is arranged on the outer periphery of the spline shaft and is positioned on a side of the front surface of the piston, the friction discs and the dual discs are axially alternately arranged, the brake shell is meshed with the friction discs via internal spline, the dual discs are meshed with the spline shaft via internal splines, and a high-pressure oil circuit and a lubricating oil circuit are arranged in a tank. The wet multi-disc parking brake has the advantages that the wet multi-disc parking brake is small in radial size, and dry friction among the friction discs and the dual discs can be prevented.

Description

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Claims

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Application Information

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Owner CRRC QISHUYAN INSTITUTE CO LTD
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