Automotive shock absorber

Abstract

The invention relates to an automotive shock absorber comprising an inner cylinder and an outer cylinder, wherein an oil storing cylinder is formed between the inner cylinder and the outer cylinder; a connecting rod, a piston valve and a bottom valve are arranged in the inner cylinder; the connecting rod is provided with a guide sealing device which is opposite to tops of the inner cylinder and the outer cylinder; the guide sealing device comprises a guider and an oil seal seat; one end of the oil seal seat is embedded in one end of the guider; an oil inlet passage and an oil guiding cavity are arranged between opposite surfaces of the guider and the oil seal seat; the oil guiding cavity is communicated with a through hole by the oil inlet passage; an oil outlet passage for communicating the oil guiding cavity with the oil storing cylinder is arranged at a position of the guider, which is opposite to the oil guiding cavity; an annular bump raised towards the direction of the oil seal seat is arranged at a position of the opposite surface of the guider, which is opposite to the oil guiding cavity; an annular tongue piece raised towards the direction of the annular bump is arranged at a position of the opposite surface of the oil seal seat, which is opposite to the oil guiding cavity; and the annular tongue piece is arranged at one side of the annular bump, which is opposite to the oil outlet passage. Due to the technical scheme, the automotive shock absorber has the effects of higher air impermeability, lower foaming degree and no lost motion.

Description

technical field [0001] The invention relates to an automobile shock absorber. Background technique [0002] Automobile shock absorbers usually include an inner cylinder and an outer cylinder. An oil storage cylinder is formed between the inner cylinder and the outer cylinder. A connecting rod, a piston valve, and a bottom valve are arranged in the inner cylinder. The piston valve is sleeved on the connecting rod. The bottom valve is set at the bottom of the inner cylinder, and the piston valve divides the inner cylinder into upper and lower working oil cylinders. The connecting rod is provided with a guide sealing device corresponding to the top of the inner cylinder and the outer cylinder. The guide seal device includes coaxially arranged The guide and the oil seal seat, the middle part of the guide and the oil seal seat is provided with a through hole for the connecting rod to pass through, one end of the oil seal seat is embedded in one end of the guide, and the opposite ...

AI Technical Summary

Problems solved by technology

In the existing guide sealing device of the automobile shock absorber, when the connecting rod moves upward relative to the bottom valve, since the oil in the working oil cylinder enters the oil guide cavity from the gap between the guide device and the connecting rod, the oil in the oil guide cavity The oil pressure is high, which causes the oil exported from the oil outlet channel to splash with the oil in the oil storage tank, resulting in foaming in the oil storage tank

Moreover, when the connecting rod moves downward relative to the bottom valve, the gas in the oil storage cylinder easily enters the working oil cylinder of the shock absorber from the oil outlet passage, the oil guide chamber and the oil inlet passage, thus causing the shock absorber to lose its space.

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