Vent valve assembly for car retarder

Abstract

A vent valve assembly for a car retarder comprises a plastic vent valve body (1) and a central hole (2) on the vent valve body (1). The bore diameter of one end of the central hole (2) is smaller than that of the other end of the central hole (2), oil absorption media (3) are arranged in the central hole (2), and a dust cap (4) is arranged at the end with the large bore diameter of the central hole (2) of the vent valve body (1). Compared with the prior art, the vent valve assembly has the advantages that the plastic vent valve body can bear large temperature difference change and is not easy to age, the contact area of the cone-frustum-shaped central hole and lubricating oil is decreased while the intake effect is ensured by the central hole, the lubricating oil does not easily enter the central hole, even if a small amount of lubricating oil enters the central hole, the lubricating oil can be absorbed by the oil absorption media without leaking to the outer side of the car retarder, dust cannot enter the central hole under the action of the dust cap and the oil absorption media, the car retarder is not easily damaged, and the car retarder is high in use stability.

Description

technical field [0001] The invention relates to a ventilation valve assembly of a vehicle speed reducer. Background technique [0002] A complete working process of the vehicle reducer will generate a large amount of heat, resulting in high pressure in the sealed compartment of the reducer, so the vehicle reducer is equipped with a vent valve assembly to cooperate with the respiration of the reducer, so that the internal high pressure of the reducer can pass through The vent valve exhausts; when the internal pressure of the reducer is low, the external air will enter the reducer through the vent valve to supplement, so that the vehicle reducer can work normally. At present, the ventilation valve of the vehicle reducer in the prior art is assembled as a cylindrical rubber plug with a central through hole, but in actual use, due to the large temperature difference of the vehicle reducer in the working process, it is easy to age and has a long service life. Short, and the lubr...

AI Technical Summary

Problems solved by technology

At present, the ventilation valve of the vehicle reducer in the prior art is assembled as a cylindrical rubber plug with a central through hole, but in actual use, due to the large temperature difference of the vehicle reducer in the working process, it is easy to age and has a long service life. Short, and the lubricating oil inside the vehicle reducer is easy to leak from the center through hole, and the outside dust is easy to enter the vehicle reducer through the center hole, and then the vehicle reducer is damaged.

Therefore, the air valve assembly of the vehicle brake reducer in the prior art has the problems of short service life, easy oil leakage and poor stability in use.

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