Push rod type stiffness steplessly adjustable oil and gas spring

Abstract

The invention relates to a push rod type stiffness stepless adjustment hydro-pneumatic spring. The push rod type stiffness stepless adjustment hydro-pneumatic spring comprises a main working cylinder, an oil tube and an auxiliary working cylinder; one end of the oil tube is connected with the upper end of the main working cylinder; the auxiliary working cylinder is connected with the other end of the oil tube. The push rod type stiffness stepless adjustment hydro-pneumatic spring is characterized in that the auxiliary working cylinder comprises an auxiliary cylinder; a damping valve assembly is arranged at the upper end inside the auxiliary cylinder; an air bag is arranged under the damping valve assembly; the air bag is arranged on an air bag seat; the air bag is fixed in the auxiliary cylinder through the air bag seat; an auxiliary piston with a through hole is arranged under the air bag seat and the air bag; one end of an auxiliary piston rod which is connected with the auxiliary piston is provided with a lead screw which is connected with a motor. According to the push rod type stiffness stepless adjustment hydro-pneumatic spring, the stiffness characteristic of the hydro-pneumatic spring is extended into a freely evaluated variation range from a nonlinear curve and accordingly the problem of the conflict of the requirements for the stiffness of a suspension system of the safety and comfort in the driving process of a vehicle is solved and the adaptive capability to various driving conditions of the vehicle is improved.

Description

technical field [0001] The invention relates to an oil-pneumatic spring used in a vehicle suspension system, in particular to a push-rod-type oil-pneumatic spring with steplessly adjustable stiffness. Background technique [0002] The vehicle's demand for suspension system stiffness and damping will change with changes in driving conditions such as load and road conditions. When the driving conditions change, if the stiffness and damping of the suspension system cannot be adjusted accordingly, it will be difficult to achieve a satisfactory damping effect, which will seriously affect the comfort of the vehicle. [0003] At present, there are many schemes for adjustable damping shock absorbers, and the semi-active suspension technology based on adjustable damping shock absorbers is becoming more and more mature. However, there are few effective methods for adjusting the stiffness of the suspension system. The use of non-linear stiffness elastic elements such as variable pitc...

AI Technical Summary

Problems solved by technology

However, there are few effective methods for adjusting the stiffness of the suspension system.

Using non-linear stiffness elastic elements such as variable pitch springs or oil-gas springs can improve the comfort of the vehicle to a certain extent, but the stiffness characteristics of these elastic elements are still a fixed curve, and it is impossible to realize the stepless adjustment of the stiffness of the suspension system

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