Automobile shock absorber

Abstract

The invention provides an automobile oscillating damper, comprising an outer barrel, an inner barrel, a cylinder rod, a piston and hydraulic liquid, wherein, the part of the cylinder rod arranged inside a working cylinder is covered with an elastic grease trap sleeve, the upper end of the grease trap sleeve is fixed on a piston rod guide holder, while the lower end of the grease trap sleeve is fixed on a lower ledger plate of the piston; the piston rod guide holder is provided with a grease nipple which leads to the working cylinder and is covered by a grease nipple cover; the grease trap sleeve is of a wavy and cylindrical shape and is embedded with a ring-shaped framework along the circumferential direction in a spaced manner. The invention changes the state that oil liquid directly touches the cylinder rod and the piston rod guide holder which have relative movement in the prior oscillating damper, and the structure that an oil seal is used to seal the cylinder rod and the piston rod guide holder, instead, oil liquid is sealed in the grease trap sleeve by the invention, thereby not only relative movement between the cylinder rod and the piston rod guide holder but also oscillation damping effect is not influenced; the invention can also achieve the non-leakage effect of oil liquid, has simple structure, easy achievement and can be widely applied to various 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. , the piston rod guide seat (sealing ring) and the piston rod always have relative motion, so after the shock absorber works for a period of time, oil often leaks 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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