Auxiliary spring work load checking method of non end part contact type end part strengthened few-leaf main and auxiliary springs

Abstract

The invention relates to an auxiliary spring work load checking method of a non end part contact type end part strengthened few-leaf main and auxiliary springs belonging to the suspension steel plate spring technical field. According to the method of the invention, firstly, according to the structure size and the elastic modulus of each end part strengthened few-leaf cross-section variable main spring, the end point deformation coefficient Gx-Ei and the half rigidity KMi of each main spring, and the deformation coefficient Gx-BC at the contact point of the Nth main spring and an auxiliary spring on a parabolic segment can be determined; then, according to the half rigidity KMi of each main spring, the thickness h2 of a root straight section, the Gx-BC of the Nth main spring and a main and auxiliary spring interval Delta design value, the auxiliary spring work load of the non end part contact type end part strengthened few-leaf cross-section variable main and auxiliary springs is checked. Through the emulation proof, in adoption of the method of the invention, the accurate and reliable auxiliary spring work load checking value can be obtained; therefore, the design levels and performances of the few-leaf cross-section variable main and auxiliary springs and the smoothness of a vehicle are improved; moreover, the design and test cost is saved; and the product development speed is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a non-end-contact type end-reinforced few-piece main and auxiliary spring active load testing method. Background technique [0002] Due to the complex stress of the first main spring with variable cross-section, it not only bears vertical load, but also bears torsional load and longitudinal load. Therefore, the thickness and length of the end straight section of the first main spring are actually designed , usually greater than the thickness and length of the end straight sections of the other main springs, that is, most of the main springs with a small number of variable-section main springs with non-isomorphic end straight sections are used; at the same time, in order to strengthen the strength of the end of the main spring, usually An oblique section is added between the straight section and the parabolic section at the end of the main spring, that is, a few-piece variable-s...

AI Technical Summary

Problems solved by technology

However, since the calculation of the deformation of the end-reinforced few-piece variable-section leaf spring at any position is very complicated, it has not been possible to give the effective load of the non-end-contact end-reinforced few-piece variable-section main and auxiliary springs before. Calculation method

Although some people have previously given the design and calculation method of the leaf spring with small parabolic variable cross-section, for example, Peng Mo and Gao Jun once proposed the small variable spring in the third issue of "Automotive Engineering", 1992 (Volume 14). The design and calculation method of cross-section leaf spring, this method is mainly for the design and calculation of small-piece parabolic variable-section leaf springs with end isomorphism, and its shortcoming is that it cannot meet the requirements of small-piece variable-section main and auxiliary springs with non-isomorphic ends The design requirements of the non-end-contact type end-reinforced few-piece variable-section main and auxiliary springs are not able to meet the requirements of the load check calculation of the auxiliary springs.

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