Load checking calculation method when auxiliary spring of non-end-contact type few-piece variable cross section master and auxiliary springs works

Abstract

The invention relates to a load checking calculation method when an auxiliary spring of non-end-contact type few-piece variable cross section master and auxiliary springs works, and belongs to the technical field of suspension steel plate springs. The load checking calculation method comprises the following steps: according to the structure size and the elasticity modulus of each parabolic type variable cross section master spring piece with a flat end section and a non-equal structure, firstly determining the deformation coefficient and the half rigidity of an end point of each master spring piece, and the deformation coefficient Gx-BC of the Nth master spring piece at the contact point of a parabolic segment and the auxiliary spring; finally, according to the thickness of a flat section of the root of the master spring, the half rigidity of the master spring piece, the Gx-BC of the Nth master spring piece, and the gap design value of the master and auxiliary springs, performing checking calculation on the load when the auxiliary spring works. Through deformation simulation verification, accurate checking calculation on the load when the auxiliary spring of the non-end-contact type few-sheet variable cross section master and auxiliary springs works can be performed according to the method, so that the design level and the properties of products are improved, and the ride comfort of a vehicle is improved; besides, the weight and the cost of the springs are reduced, the design and experiment expenses are reduced, and the product development speed is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking and calculating the active load of an auxiliary spring of a non-end contact type few-piece primary and auxiliary spring with variable cross-section. Background technique [0002] In order to meet the variable stiffness design requirements of the vehicle suspension under different loads, a small number of variable cross-section leaf springs are usually designed as the main spring and the auxiliary spring. There is a certain gap between the main spring and the auxiliary spring contacts. The design requirements for the active load of the auxiliary spring. Since the first piece of the main spring with variable cross-section is subjected to complex forces, it not only bears vertical loads, but also bears torsional loads and longitudinal loads. Therefore, the end thickness of the first leaf spring actually designed is usually thicker than other springs. Each pi...

AI Technical Summary

Problems solved by technology

However, because the calculation of the deformation at any position of the non-isomorphic few-piece parabolic variable-section leaf spring is very complicated, it has not been possible to give the non-end-contact type small-piece variable-section primary and secondary springs before. Reliable Calculation Method of Acting Load

Although someone has previously given a design method for a few variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed the design of variable-section leaf springs in "Automotive Engineering", 1992 (Volume 14) No. 3 Calculation method, this method is mainly for the design and calculation of few-piece parabolic variable-section leaf springs with end isomorphism, and its shortcoming is that it cannot meet the design and calculation of few-piece parabolic variable-section leaf springs with non-isomorphic ends requirements, and it cannot meet the checking calculation requirements of the non-end contact type few parabolic variable cross-section main and auxiliary springs and auxiliary springs.

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