Method for verifying strength of each leaf of end contact type few-leaf oblique main and auxiliary springs

Abstract

The invention relates to a method for verifying strength of each leaf of end contact type few-leaf oblique main and auxiliary springs and belongs to the technical field of suspension leaf springs. It is possible to verify and calculate stress strength of each of main and auxiliary leaves according to structural parameters, elastic model and allowable stress of all main and auxiliary leaves of the end contact type few-leaf oblique variable-section main and auxiliary springs, acting load of each auxiliary spring and maximum load bearable by a main spring. Experiments and simulation tests show that this method is correct, maximum stress verification calculations of all main and auxiliary leaves are accurate and reliable, the design level, product quality and life of the end contact type few-leaf oblique variable-section main and auxiliary leaf springs as well as vehicle driving smoothness may be improved; meanwhile, it is also possible to reduce designing and testing cost and increase product development speed.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking the strength of each leaf of an end-contact type few-leaf slash-line primary and secondary spring. Background technique [0002] Compared with multi-sheet superimposed leaf springs, the few-piece variable-section leaf spring has the advantages of saving materials, reducing the unsprung mass, improving vehicle ride comfort and transportation efficiency, etc. Therefore, it has attracted great attention from domestic and foreign vehicle experts, and has already It has been widely promoted and applied. For a small number of leaf springs with variable cross-section, in order to meet the requirements of variable stiffness, it is usually designed as the main and auxiliary springs, and through the gap between the main and auxiliary springs, it is ensured that the main and auxiliary springs contact and work together after the load is greater than the auxiliary spri...

AI Technical Summary

Problems solved by technology

The composite rigidity of the main and auxiliary springs with small oblique lines and variable cross-sections should meet the design requirements for vehicle ride comfort, and the strength should meet the service life and safety requirements of the suspension springs. However, due to the The length of the main spring and the auxiliary spring of the spring are not equal, and the straight sections of the ends of the main springs of each piece are not isomorphic, and after the main spring and the auxiliary spring are in contact, the deformation and internal force of the main spring and the auxiliary spring are coupled. The calculation of the maximum stress of the main and auxiliary springs of the inclined-line variable-section main and auxiliary springs is very complicated. It has not been possible to give a simple, accurate and reliable end-contact type small-piece oblique-shaped variable-section main and auxiliary springs. Calibration method of sheet strength

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