Ventilation device for auto parts

Abstract

The invention discloses a ventilation device for automobile parts, and relates to a ventilation device. A shell is fixedly provided with a separation round plate, the separation round plate divides the inner part of the shell into an upper cavity and a lower cavity, a sealing ring is fixed in a round hole formed in the separation round plate, two C-shaped channels are arranged in the shell wall ofthe shell, the C-shaped channels communicate with the upper cavity and the lower cavity, a ventilation hole is formed in the closed end of the shell, two first oil seal rings fixedly sleeve the upperend and the lower end of a piston and tightly slide in the lower cavity, a second oil seal ring sleeves between the two first oil seal rings of the piston and is fixedly connected with the lower cavity, a T-shaped channel is formed in the piston, a plugging rubber ball is tightly sealed and blocked outside the vent hole, the sealing rubber ball is fixedly connected with the upper end of the piston through a round rod, the middle position of the round rod slides in the sealing ring, and a pressure spring is arranged on the round rod at intervals and is supported between the separation round plate and the piston. The ventilation device has the advantages that air pressure can be conveniently discharged, and good waterproof and dustproof effects are achieved.

Description

technical field [0001] The invention relates to a ventilation device, in particular to a ventilation device for auto parts. Background technique [0002] There are many parts in auto parts that will generate air pressure inside during operation, and the air pressure will gradually increase with the rise of the internal temperature of these parts, such as transmission and drive axle, etc., and the air pressure will affect the normal operation of these parts, so it is necessary to configure Ventilation device, and the ventilation device not only needs to facilitate the discharge of the internal air pressure of these components, but also has a good waterproof and dustproof effect to prevent water and dust from entering the interior of these components and causing damage. [0003] The authorized announcement number is CN104197060A, and the authorized announcement date is December 10, 2014. The invention patent named "A Vent Plug" has a seal between the plug cap and the plug body...

AI Technical Summary

Problems solved by technology

[0004] The authorized announcement number is CN102767614A, and the authorized announcement date is November 07, 2012. The invention patent named "reducer and its ventilation device" has the first partition and the second partition arranged in a serpentine airway, which can reduce the air pressure For discharge, the serpentine airway can also block water and dust to a certain extent, but the effect is average

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