Automobile shock absorber

Abstract

The invention proposes an automobile shock absorber, which includes an outer cylinder, an inner cylinder, a piston rod, a piston and hydraulic oil, and an elastic oil-separating sleeve is placed on the part of the piston rod located in the working cylinder, and the upper end of the oil-separating sleeve is It is fixed on the piston rod guide seat, and the lower end is fixed on the lower fixing plate on the piston. At the same time, a grease nozzle leading to the working cylinder is arranged on the piston rod guide seat, and is covered by a grease nozzle cover. The shape of the oil-separating sleeve is a corrugated cylinder, which is inlaid with annular skeletons at intervals in the circumferential direction. The present invention changes the state that the existing shock absorber allows the oil to directly contact the piston rod and the piston rod guide seat with relative motion, and also changes the structure of sealing the piston rod and the piston rod guide seat with an oil seal, and uses the oil It is sealed in the oil-separating sleeve, which will neither affect the relative movement between the piston rod and the piston rod guide seat, nor affect the vibration damping effect, but also achieve the effect of no oil leakage. The structure is simple, easy to realize, and can be Widely used in various types of vehicles.

Description

technical field [0001] The invention belongs to the technology of automobile parts, and in particular relates to an automobile shock absorber. Background technique [0002] The double-tube hydraulic shock absorber has been widely used in modern automobiles because of its advantages such as easy adjustment of resistance, simple structure, and low price. or compression), the oil in the working cylinder flows through the valve body (extension valve or flow valve) to generate reset resistance or compression resistance. This resistance (damping) can effectively and quickly attenuate vehicle vibration and increase vehicle ride comfort. However, because there is relative movement between the piston rod guide seat and the piston rod when the shock absorber is working, the oil in the working cylinder directly contacts the piston rod guide seat and the piston rod. A seal ring is installed between the rod guide seat and the piston rod to prevent oil leakage, but this cannot fundamenta...

AI Technical Summary

Problems solved by technology

[0007] Although the shock absorber is working (compression stroke and extension stroke) the piston rod 102 and the piston rod guide seat 107 are interference fit through the seal ring, but the oil directly contacts the piston rod guide seat (sealing ring) and the piston rod, There is always relative motion between the piston rod guide seat (sealing ring) and the piston rod, so after the shock absorber works for a period of time, oil often leaks out from between the piston rod 102 and the piston rod guide seat 107, and the working cylinder 108 The oil in the oil is getting less and less, which eventually leads to the failure of the shock absorber and pollutes the environment

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