Delong-series secondary and third snub brake master valve with filter mesh

Abstract

The invention discloses a Delong-series secondary and third snub brake master valve with a filter mesh. The Delong-series secondary and third snub brake master valve with the filter mesh comprises a pedal seat, an upper body, a middle body and a lower body which are fixed together in a sealing manner; a balance piston is arranged at the upper part of the inner cavity of the upper body in a sleeving manner; a primary balance spring is arranged out of a spring clamping sleeve in the sleeving manner; a secondary balance spring is arranged in the spring clamping sleeve in the sleeving manner. An upper valve seat is clamped and fixed to the inner side of the wall of an upper valve through an elastic baffle ring; a lower valve seat is clamped and fixed to the inner side of the wall of a lower valve through an elastic baffle ring. According to the Delong-series secondary and third snub brake master valve with the filter mesh, the structure with an annular inner flange on the upper part and an annular outer flange on the lower part is adopted, so that the structure of the spring clamping sleeve is simplified; the machining difficulty and the assembling difficulty are reduced; the pass rate of products can be greatly improved. The filter mesh of a valve core of a brake valve disclosed by the invention is simple in structure and convenient to mount, and can be mounted in the outer part of the valve core of the brake valve, particularly the brake master valve; the filter mesh is directly arranged on the periphery of the valve core, so that solid shells carried in a gas can be prevented from entering the valve core; therefore, the work reliability of the valve core is greatly improved, and brake accidents are avoided.

Description

technical field [0001] The invention relates to the technical field of parts of automobile brake valves, in particular to a Delong series secondary and tertiary point braking master valve with filter screens. Background technique [0002] The braking system of trucks and heavy-duty vehicles in the prior art brakes too quickly, and the foot feel is not easy to control, which will easily cause the brake pads to heat up rapidly, resulting in carbonization, which directly affects the braking effect. bias, affecting the overall stability, resulting in insecurity, or unnecessary economic losses. In order to solve these braking problems of trucks, our unit has successively proposed a series of patents on the two-stage point brake structure and three-stage balance piston assembly, such as the invention patent with the publication number CN 101837774 A, which can output ". The principle of "point brake" can make the compressed air form pulses in the control pipe section and air cha...

AI Technical Summary

Problems solved by technology

[0003] At present, there are generally filters in the pipeline of the braking system, which are used to filter the solid particle impurities flowing with the gas in the air pipe, so as to ensure that each braking component is not affected by solid particle impurities and ensure the reliability of its work. However, due to the distance between the filter and the spool of each valve, it cannot be avoided that the filtered gas will be polluted by other newly generated solid particles before entering the spool. Sometimes solid particles will still enter the spool and affect the spool. The airtightness caused by air leakage accidents, a new solution needs to be put forward

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