Rigidity-variable spiral spring

Abstract

The invention discloses a rigidity-variable spiral spring. The rigidity-variable spiral spring comprises a spring body, two ends of the spring body are an end A and an end B respectively, and the middle diameter of the end B is smaller than that of the end A; and the spring body is sequentially composed of a first effective ring, a second effective ring, a third effective ring, a fourth effective ring and a plurality of fifth effective rings from the end B to the end A, and the wire diameter of the first effective ring < the wire diameter of the second effective ring <= the wire diameter of the third effective ring <= the wire diameter of the fourth effective ring <= the wire diameter of the fifth effective rings. The invention relates to the technical field of springs. The rigidity-variable spiral spring has lower rigidity than a common spring when a vehicle is half-loaded, so that the offset frequency of a suspension is reduced, the comfort and smoothness of the vehicle are improved, the rigidity of the rigidity-variable spring changes when the vehicle turns, so that the roll rigidity of the whole vehicle is improved, and the rigidity of the spring increases when the vehicle is full-loaded and after the small pitch of B is compressed, so the requirement of spring load when the vehicle is fully loaded is met.

Description

technical field [0001] The invention relates to the technical field of springs, in particular to a helical spring with variable stiffness. Background technique [0002] The main function of the coil spring is to combine the coil spring and the shock absorber to transmit the force of the ground to the wheel to the frame and sub-frame. At the same time, the impact of the ground on the wheels is reduced through the compression and expansion of the coil springs and shock absorbers. [0003] In the prior art, for example, the invention patent with the application number 201820990620.8 discloses a coil spring with variable stiffness, which is divided into four sections of effective coils, starting from the lower end of the coil spring as a support coil, and then from bottom to top as follows: The first effective coil of the helical spring, the second effective coil of the helical spring, the third effective coil of the helical spring, and the fourth effective coil of the helical ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a coil spring with variable stiffness, which solves the requirement of the spring load when the vehicle is fully loaded, which cannot be achieved by the existing springs.

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