Automobile hydraulic braking main cylinder secondary leather cup

Abstract

The invention discloses an auxiliary leather cup of an automobile hydraulic brake master cylinder, and a component of an automobile hydraulic brake master cylinder, including a bowl body, the outer wall of the bowl body is provided with a sealing main lip, and the outer wall bottom of the bowl body is The end is provided with a sealing auxiliary lip, and the bottom side wall of the sealing auxiliary lip is in the same plane as the bottom end of the bowl and the plane is perpendicular to the axis of the bowl. The beneficial effect of the invention is that the vacuum degree requirement of the main cylinder is fully guaranteed, and the assembly is relatively simple, the movement resistance of the piston is reduced, and the service life of the main cylinder is prolonged.

Description

technical field [0001] The invention relates to a component of an automobile hydraulic brake master cylinder, in particular to an auxiliary leather cup of the automobile hydraulic brake master cylinder. Background technique [0002] The brake master cylinder is mainly composed of the cylinder body and the piston in the cylinder body, the return spring, the main cup, the auxiliary cup and the residual valve, etc. It is the main brake component in the automobile hydraulic brake system. The dynamic fluid enters the brake wheel cylinder on the brake disc through the brake pipeline through the oil outlet, so as to achieve the purpose of braking the car. Among them, the automobile brake master cylinder has vacuum sealing requirements, that is, when the master cylinder has no brake fluid, the oil outlet hole is closed, the oil inlet hole is connected to the vacuum source, and the vacuum seal of the brake master cylinder within a certain period of time The performance reaches the s...

AI Technical Summary

Problems solved by technology

At present, there are mainly two types of auxiliary cups for brake master cylinders on the market, one of which has only one main sealing lip (such as image 3 As shown), when the compression amount is too small, the lip is easily deformed and cannot meet the specified vacuum degree requirements; when the compression amount is too large, the assembly is relatively difficult, the resistance of the piston movement increases, and the back and forth is not smooth, and the compression amount is too large. The wear of the cup is relatively fast during reciprocating movement, which shortens the service life of the master cylinder, and the temperature in northern my country is relatively low in winter, so the hardness of the cup is relatively hard and easier to wear, which greatly reduces the service life

The structure of the second type of auxiliary cup is to add a sealing auxiliary lip similar to the main sealing lip on the basis of the first type of auxiliary cup, except that the compression of the auxiliary sealing lip is smaller than that of the main lip. The structure of this structure The change only increases the reliability of the vacuum seal, however, several defects such as the first structure still exist, and the sharp-edged lip is more likely to be damaged

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