Membrane type spring braking air chamber for braking system of truck

Abstract

The invention discloses a membrane type spring braking air chamber for a braking system of a truck. A bidirectional guide sealing ring is integrally arranged between a piston assembly and a connecting cover and is distributed on an axial matching wall of the whole piston assembly and the connecting cover; the diameter of a middle section of the bidirectional guide sealing ring along axial direction is less than the diameters of two ends; the shape of the surface of the connecting cover in contact with the bidirectional guide sealing ring is fit with the shape of the bidirectional guide sealing ring; a radial bulge of the bidirectional guide sealing ring is formed on an internal end face of the connecting cover and is fit with the internal end face of the connecting cover; the bidirectional guide sealing ring at the internal end is of a conical shape; and an annular V-shaped slot is formed on the end face at the end of the bidirectional guide sealing ring facing an external end face of the connecting cover. According to the technical scheme, the structure of products is simplified, the production period is shortened, the cost is lowered, and the reliability and the durability of products are increased, so that the property and service life of the products are increased and the braking system of the truck is safer.

Description

technical field [0001] The invention belongs to the technical field of a truck braking system, and relates to an actuator device of the braking system. More specifically, the invention relates to a diaphragm spring brake air chamber of the truck braking system. Background technique [0002] In the prior art, the membrane spring brake air chamber in the truck brake system has a complex structure and low durability. As shown in the accompanying drawings of this manual figure 1 and figure 2 As shown, sealing and guiding are realized between the piston assembly 1 and the connecting cover 4 through the guide seal ring 3 and the O-ring seal 2 . [0003] However, the guide seal ring 3 and the O-ring seal 2 adopt a two-piece split structure, the guide seal ring 3 is made of polyoxymethylene material; the O-ring seal 2 is made of nitrile rubber, the durability is limited, and it is difficult to meet the increasing demands. Durability requirements. And when the guide sealing ring...

AI Technical Summary

Problems solved by technology

[0003] However, the guide seal ring 3 and the O-ring seal 2 adopt a two-piece split structure, the guide seal ring 3 is made of polyoxymethylene material; the O-ring seal 2 is made of nitrile rubber, the durability is limited, and it is difficult to meet the increasing demands. Durability requirements

However, when the guide seal ring 3 and the O-ring seal 2 are damaged, the air leakage in the air chamber will cause the vehicle brake system to fail, making it impossible to brake, and accidents will easily occur.

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