Method for calculating separate stresses of main and auxiliary springs of non-end contact and few-leaf diagonal type

Abstract

The invention relates to a method for calculating separate stresses of main and auxiliary springs of a non-end contact and few-leaf diagonal type. The method belongs to the technical field of suspension steel plate springs. The method provided by the invention is characterized in that the stresses of each main spring and each auxiliary spring at different positions can be calculated according to structural parameters and elasticity moduli of each main spring and each auxiliary spring among the main and auxiliary springs of the non-end contact, few-leaf diagonal and cross-section variable type as well as acting loads of the auxiliary springs and loads borne by the main and auxiliary springs. Instance verification and simulation verification show that the method for calculating the separate stresses of the main and auxiliary springs of the non-end contact, few-leaf diagonal and cross-section variable type is correct; the calculated stress values at the different positions are accurate and reliable; and a technological foundation is laid for stress strength checking. The method has the advantages that a design level, product quality and service life of the main and auxiliary springs of the non-end contact, few-leaf diagonal and cross-section variable type as well as vehicle running smoothness can be enhanced; and meanwhile, expenses for design and experiments can be reduced, and product development can be accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for calculating the stress of each leaf of a non-end contact type few-leaf slash-line primary and secondary spring. Background technique [0002] Since the first piece of the main spring with variable cross-section is subjected to complex forces, it not only bears the vertical load, but also bears the torsional load and the longitudinal load. Therefore, the thickness of the straight section at the end of the first main spring is actually designed , usually thicker than other main springs, that is, in actual design and production, most of them use a few variable-section leaf springs with non-equal ends. At present, there are mainly two types of leaf springs with variable cross-section, one is parabolic type, and the other is oblique type. Among them, the stress of parabolic type is equal stress, and its stress load is more reasonable than that of oblique type. However,...

AI Technical Summary

Problems solved by technology

Because the straight section at the end of each piece of main spring is not isomorphic, and when the load is greater than the effective load of the auxiliary spring, after the contact between the main spring and the auxiliary spring, the deformation and internal force of the main spring and the auxiliary spring are coupled. The end point force of the spring and auxiliary spring and the stress analysis and calculation at different positions are very complicated. At present, there has not been an accurate calculation of the main spring and auxiliary spring of the non-end contact type small oblique line type variable cross-section main spring and auxiliary spring at home and abroad. Calculation method of spring stress at different positions

Images