Method for determining end point force of main and auxiliary springs of non-end contact, few-leaf diagonal and cross-section variable type

Abstract

The invention relates to a method for determining end point force of main and auxiliary springs of a non-end contact, few-leaf diagonal and cross-section variable type. The method belongs to the technical field of suspension steel plate springs. The method provided by the invention is characterized in that the end point force of each main spring and each auxiliary spring is determined 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 loads borne by the main and auxiliary springs. Instance verification and simulation verification show that the method for determining the end point force of the main and auxiliary springs of the non-end contact, few-leaf diagonal and cross-section variable type provided by the invention is correct; by the method, the accurate and reliable end point force of each main spring and each auxiliary spring can be obtained; and an important technological foundation is laid for design, composite rigidity calculation and stress strength checking of the main and auxiliary springs of the non-end contact, few-leaf diagonal and cross-section variable type. 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 determining the end point force of a non-end contact type few-piece inclined-line type variable-section primary and secondary springs. 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 ...

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 working load of the auxiliary spring, after the main and auxiliary springs are in contact, the deformation and internal force of the main spring and auxiliary spring are coupled, therefore, each piece of main spring The analysis and calculation of the end force of the auxiliary spring and auxiliary spring is very complicated. At present, no accurate analytical calculation method for the end point force of the non-end contact type small-piece oblique line variable cross-section main and auxiliary spring has been given at home and abroad.

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