Plunger type brake master cylinder suitable for single-cavity structure of tractor

Abstract

The plunger type brake master cylinder suitable for the single-cavity structure of the tractor comprises a cylinder body, a piston capable of moving front and back is connected in the cylinder body, a brake cavity is formed between the front end of the piston and the inner wall of the cylinder body, two annular mounting grooves are formed in the inner wall of the cylinder body, pressure leather rings are arranged in the mounting grooves, and the pressure leather rings are arranged in the mounting grooves. The pressure leather ring is in sealing fit with the outer side wall of the piston, a concave hole penetrating through the front end of the piston is formed in the piston, a reset spring is arranged in the cylinder body in the front-back direction, the front end of the reset spring abuts against the inner wall of the cylinder body, the rear end of the reset spring abuts against the bottom of the concave hole, and an oil inlet hole communicated with the interior of the cylinder body is formed in the cylinder body. An oil inlet hole is formed in the position between the two pressure leather rings, a compensation hole capable of communicating the oil inlet hole with the brake cavity is formed in the side wall of the piston, an oil outlet hole communicating with the interior of the cylinder body is formed in the cylinder body, and a balance valve assembly communicating with the interior of the cylinder body is arranged on the side wall of the cylinder body.

Description

technical field [0001] The invention relates to the technical field of vehicle brake master cylinders, in particular to a plunger type brake master cylinder suitable for a tractor single-chamber structure. Background technique [0002] like figure 1 and 2 As shown, the traditionally designed tractor brake master cylinder is composed of a cylinder block A, a piston assembly B, a balance valve assembly C and other accessories. The piston assembly B is connected to a sliding sleeve D. During the braking process, the sliding sleeve D and the The piston assembly B performs the piston movement at the same time, and the sliding sleeve D pushes open the valve core F of the balance valve assembly C, so that the balance valve assembly C is always in an open state. Valve assembly C is closed. Therefore, the sliding sleeve D plays the role of opening and closing the balance valve assembly C during the reciprocating process. It can be known from the traditionally designed brake master...

AI Technical Summary

Problems solved by technology

Therefore, the sliding sleeve D plays the role of opening and closing the balance valve assembly C during the reciprocating process. From the traditional design of the brake master cylinder, it can be known that the brake master cylinder is due to the internal structure design and the need for space layout. Therefore, the cylinder body A and the piston assembly B are relatively long in design, occupying a large space, and the piston assembly is provided with a groove for installing a leather case, the processing technology is complicated, and the manufacturing cost is high.

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