Automobile hydraulic brake braking main cylinder
A technology of hydraulic brakes and brake master cylinders, applied in the direction of hydraulic brake transmission devices, etc., can solve the problems of reducing the service life of the brake master cylinder, fatigue damage of the main apron, shortening the service life of the main apron, etc., so as to improve the overall The effect of service life, fatigue damage reduction, and overall service life extension
Active Publication Date: 2014-04-23
RIZHAO BEIYE BRAKE PUMP
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Problems solved by technology
However, due to the large gap between the outer peripheral surface of the manganese steel valve plate and the inner wall of the cylinder, there is a gap when the manganese steel valve plate supports the main apron, that is, the outer edge of the main apron cannot be supported by the valve plate. , under the action of high pressure in the brake chamber, the edge of the manganese steel valve plate forms an impact on the main apron, which causes fatigue damage to the main apron, shortens the service life of the main apron, and correspondingly reduces the service life of the brake master cylinder
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[0013] The front and rear directions involved in the present invention are stipulated as follows: the direction of the piston movement during braking is the front, and the opposite direction is the rear; figure 1 The status on the drawing is the reference, the left side of the drawing is the front and the right side is the back.
[0014] Such as figure 1 As shown, the brake master cylinder of the automobile hydraulic brake includes a cylinder body 1, and a piston 3 installed in the inner cavity of the cylinder body 1. The front part of the piston 3 is provided with a head whose radial dimension is much larger than other sections, that is, the piston head. Part 13, the front part of the piston 3 is fitted with the main apron 6 which is close to the piston head 13, and the valve plate 5 for supporting the main apron 6 is arranged between the piston head 13 and the main apron 6. The valve plate 5 is a rigid plate made of a low-hardness material whose hardness is lower than tha...
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The invention discloses an automobile hydraulic brake braking main cylinder which comprises a cylinder body, a piston installed in a cylinder body inner cavity and a main leather ring sleeved on the front portion of the piston and clinging to the head of the piston. The cylinder body inner cavity is divided into a rear liquid storage cavity and a front braking cavity through the main leather ring, a resetting spring used for driving the piston to be reset is arranged in the braking cavity, an oil inlet cavity, a compensation hole and an oil inlet hole are arranged in the cylinder body, and the compensation hole and the oil inlet hole communicate the oil inlet cavity and the cylinder body inner cavity and are arranged at intervals in the front-back direction. A valve block used for supporting the main leather ring is arranged between the head of the piston and the main leather ring. An oil outlet hole communicated with a wheel cylinder is formed in the cavity wall of the braking cavity. The valve block is a rigid block made of a low-hardness material with the hardness smaller than that of a cylinder body material, preference is given to a nylon valve block, the peripheral side of the valve block is in clearance fit with the surface of the cylinder body inner cavity, and preference is given to zero clearance fit. The braking main cylinder is long in service life.
Description
technical field [0001] The invention belongs to the technical field of automobile hydraulic brakes, and in particular relates to a brake master cylinder of an automobile hydraulic brake. Background technique [0002] The brake master cylinder is the main brake component in the automobile hydraulic braking system. The brake fluid output by it enters the brake wheel cylinder on the brake disc through the oil outlet through the brake pipeline, so as to realize the braking effect of the automobile. Purpose. [0003] At present, the valve plate supporting the main cup of the brake master cylinder is made of manganese steel. Because the material of manganese steel is hard, there must be a sufficient gap between the inner diameter of the cylinder and the outer peripheral surface of the valve plate. The gap is generally 0.2- 0.3mm, to prevent the failure of the brake master cylinder caused by the leakage of liquid between the liquid storage chamber and the brake chamber caused by t...
Claims
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Inventor 李杨李中文
Owner RIZHAO BEIYE BRAKE PUMP