Brake cylinder

Abstract

The utility model relates to a brake wheel cylinder which comprises two groups of pistons arranged in a wheel cylinder body, the two groups of pistons are provided with sealing assemblies, wear-resistant sleeves are arranged between the two groups of pistons and the wheel cylinder body, and the wear-resistant sleeves are embedded in the pistons or embedded in the wheel cylinder body. The wear-resistant sleeve is arranged between the piston and the wheel cylinder body, so that the problem of excessive wear between the piston and the wheel cylinder body caused by counter-acting force in the braking process of a conventional hydraulic brake is solved, the phenomena of braking clamping stagnation, unsmooth return and the like in the braking process are relieved, the reliability of the brake is effectively improved, and the service life of the brake is effectively prolonged. And the driving safety is fully improved.

Description

Technical Field

[0001] The utility model relates to the technical field of commercial vehicle parts, in particular to a brake cylinder. Background Art

[0002] With the widespread application of hydraulic brakes in the commercial vehicle market, the requirements for its core component, the brake cylinder, are becoming increasingly higher. According to after-sales market data statistics, hydraulic brake brake cylinder oil leakage is an important factor affecting the life of hydraulic brakes.

[0003] During the braking process of common hydraulic brakes, the brake shoe will give a reaction force to the slave cylinder piston after being subjected to force. There will be a certain angle between this force and the braking direction of the slave cylinder, causing the piston to tilt, and then rubbing against the inner hole of the wheel cylinder, causing scratches on the inner hole of the wheel cylinder, causing rust in the inner hole of the wheel cylinder, causing abnormal wear of the piston sealing ring, and causing oil leakage from the brake slave cylinder, which can easily cause the brake assembly to get stuck and return poorly. In severe cases, it will cause the brake to lock, affecting driving safety. Utility Model Content

[0004] The utility model aims to provide a brake cylinder to address the deficiencies of the prior art, and to alleviate the problem of excessive wear between the piston and the cylinder body by providing a wear-resistant sleeve between the piston and the cylinder body.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A brake cylinder comprises two groups of pistons arranged in a cylinder body, the two groups of pistons are provided with sealing components, wear-resistant sleeves are provided between the two groups of pistons and the cylinder body, and the wear-resistant sleeves are embedded in the pistons or embedded in the cylinder body.

[0007] Preferably, the piston is provided with a slot, the sealing assembly is arranged in the slot, the sealing assembly and the slot are interference fit, and the sealing assembly is in contact with the slave cylinder body.

[0008] Preferably, the wear-resistant sleeve is made of a wear-resistant composite material.

[0009] Compared with the prior art, the utility model has the following beneficial technical effects:

[0010] By providing a wear-resistant sleeve between the piston and the slave cylinder body, the problem of excessive wear between the piston and the slave cylinder body caused by the reaction force during braking of conventional hydraulic brakes is solved, and the brake sticking, poor return and other phenomena during braking are alleviated, which effectively improves the reliability and service life of the brake, and fully improves driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a schematic diagram of the structure in which the wear-resistant sleeve is embedded in the piston in the utility model;

[0012] Figure 2 It is a structural schematic diagram of the wear-resistant sleeve embedded in the slave pump body in the utility model.

[0013] Reference numerals

[0014] 1. Slave pump body; 2. Piston; 3. Sealing assembly; 4. Wear-resistant sleeve. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0016] like Figure 1 As shown, a brake cylinder comprises two groups of pistons 2 arranged in a cylinder body 1, the two groups of pistons 2 are provided with sealing components 3, wear-resistant sleeves 4 are provided between the two groups of pistons 2 and the cylinder body 1, and the wear-resistant sleeves 4 are embedded in the pistons 2.

[0017] like Figure 2 As shown, the wear-resistant sleeve 4 is embedded in the slave pump body 1.

[0018] By providing a wear-resistant sleeve 4 between the piston 2 and the slave cylinder body 1, the problem of excessive wear between the piston 2 and the slave cylinder body 1 caused by the reaction force during braking of conventional hydraulic brakes is solved, and the brake sticking, poor return and other phenomena during braking are alleviated, which effectively improves the reliability and service life of the brake, and fully improves driving safety.

[0019] The piston 2 is provided with a slot, and the sealing component 3 is arranged in the slot. The sealing component 3 and the slot are interference fit, and the sealing component 3 is in contact with the slave cylinder body 1 .

[0020] The wear-resistant sleeve 4 is a wear-resistant composite material, which is composed of nylon, PTFE and glass fiber or PTFE and graphite.

Claims

1. A brake cylinder, characterized in that: The invention comprises two groups of pistons (2) arranged in a slave pump body (1), the two groups of pistons (2) being provided with sealing components (3), and wear-resistant sleeves (4) being provided between the two groups of pistons (2) and the slave pump body (1), and the wear-resistant sleeves (4) being embedded in the pistons (2) or embedded in the slave pump body (1).

2. The brake cylinder according to claim 1, characterized in that: The piston (2) is provided with a slot, the sealing component (3) is arranged in the slot, the sealing component (3) is interference-fitted with the slot, and the sealing component (3) is in close contact with the slave pump body (1).

3. The brake cylinder according to claim 1, characterized in that: The wear-resistant sleeve (4) is made of a wear-resistant composite material.

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