Load bearing type damping changing impact damper

Abstract

The invention relates to a bearing-typed variable damper used for an automobile suspension, comprising a dual-cylinder oil cylinder with an internal cavity and an external cavity with an upper port consisting of an internal cylinder and an external cylinder sealed by a guider and a sealing seat, a piston arranged in the internal cavity of the oil cylinder and a piston rod connected with the piston, a check valve in the bottom part of the internal cylinder communicated with the internal cavity and the external cavity of the dual-cylinder oil cylinder, a piston check valve arranged on the piston and communicated with an upper cavity and a lower cavity, and a charging connector arranged at the lower part of the external cylinder. The invention is characterized in that the piston check valve is a normal check valve without throttle holes; the side wall at the lower part of the internal cylinder is provided with a compressed damping hole communicated with the internal cavity and the external cavity; a static seal is arranged between the sealing seat and the external cylinder; a high pressure sealing ring is arranged between the sealing seat and the piston rod. The structure of the invention is designed between the normal dual-cylinder damper and an oil-gas spring. Owning to the adopted high pressure sealing structure, the invention has the advantages of bearing static loads, and leading the normal automobile suspension to increase the bearing capability and to have the ideal nonlinear characteristic.

Description

technical field [0001] The present invention relates to a shock absorber for automobile suspension, in particular to a double-tube shock absorber which can bear the static load of the suspension. Background technique [0002] At present, the shock absorption devices widely used in automobile suspensions are one of the conventional cylinder shock absorbers and the other is an oil and gas spring. The former is a damper composed of a cylinder barrel, a piston and a damping valve, which cannot withstand the Static load; the latter is composed of oil cylinder, piston, damping valve and accumulator, which can withstand static load and has certain elasticity, but has the disadvantages of complicated structure and high cost. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a load-bearing variable damping shock absorber, which not only overcomes the defect that the ordinary cylindrical shock absorber does not have the ability to bear static load,...

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Problems solved by technology

[0002] At present, the damping devices widely used in the suspension of automobiles are commonly used cylinder shock absorbers and oil-gas springs. The former is a damper composed of a cylinder, a piston and a damping valve, and it cannot withstand the shock of the suspension. Static load; the latter is composed of cylinders, pistons, damping valves and accumulators, which can withstand static loads and have certain elasticity, but have the disadvantages of complex structure and high cost

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