Bottom valve used for sealing working cylinder in damper

Abstract

The invention discloses a bottom valve used for sealing a working cylinder in a damper. The bottom valve comprises a fixed shaft (2), a bearing washer (4), a sealing valve disc (6), a throttle valve disc (7), a bottom valve seat (1), a compensation valve disc (8) and a spiral spring (9), wherein the bearing washer (4), the sealing valve disc (6), the throttle valve disc (7), the bottom valve seat, the compensation valve disc (8) and the spiral spring (9) are sequentially sleeved on the fixed shaft (2) from bottom to top. The lower end of the fixed shaft (2) is provided with a fastening end, the upper end of the fixed shaft (2) is provided with an outer thread, a nut is sleeved at the upper end of the fixed shaft (2) and provided with an inner thread matched with the outer thread of the fixed shaft (2), and the upper end of the spiral spring (9) is connectively abutted to the lower end face of the nut (3). By the aid of the above structure, the bottom valve is simple in integral structure and convenient to realize. Action force of a piston on the bottom valve can be buffered by the spiral spring (9), and accordingly, the piston or the bottom valve is protected from being damaged.

Description

Technical field [0001] The invention relates to a vibration damping device of an automobile, in particular to a bottom valve used for closing a working cylinder in a shock absorber. Background technique [0002] With the continuous development of society, people have higher and higher requirements for the performance of automobiles, such as power, economy, braking, handling stability, and ride comfort. In order to accelerate the attenuation of vehicle vibration and improve the ride comfort of the vehicle, it is necessary to install a shock absorber in the vehicle. The shock absorber is a damping element installed between the car body and the road wheels. Its function is to attenuate the vibration of the car body and prevent the amplitude of the car body from increasing indefinitely under resonance. The shock absorber can reduce the amplitude of the car body vibration. And the number of vibrations, thus prolonging the fatigue life of the elastic element and improving the comfort ...

AI Technical Summary

Problems solved by technology

[0003] The shock absorber includes a working cylinder. The lower opening of the working cylinder is closed by a bottom valve. The existing bottom valve for closing the lower opening of the working cylinder has a simple structure. When the piston rod in the working cylinder moves, the force exerted by the piston rod on the piston will make the Hard collision occurs between the bottom valve and the piston, which will easily cause damage to the bottom valve or piston, which will affect the normal use of the shock absorber

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