Method for checking computation of complex stiffness of end contact-type main and auxiliary taper-leaf springs

Abstract

The invention relates to a method for checking computation of complex stiffness of end contact-type main and auxiliary taper-leaf springs and belongs to the technical field of suspension steel plate springs. The computation of complex stiffness of end contact-type primary and auxiliary parabolic taper-leaf springs can be accurately checked according to structural parameters and elasticity modulus of each main spring and auxiliary spring of the end contact-type main and auxiliary parabolic taper-leaf springs. According to examples and simulation verifications, the method for checking computation of complex stiffness of end contact-type main and auxiliary taper-leaf springs is correct. By means of the method, accurate and reliable complex stiffness checking computation values of end contact-type main and auxiliary taper-leaf springs can be obtained, products satisfy the complex stiffness design requirements, and therefore the product design level, performance, and vehicle ride performance are increased; at the same time, cost for design and test is reduced, and product development speed is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking and calculating the combined stiffness of a primary and secondary spring of a small-piece variable-section end-contact type. Background technique [0002] In order to meet the design requirements of variable stiffness of the vehicle suspension under different loads, a small number of variable cross-section main and auxiliary springs are used. There is a certain gap between the auxiliary spring contacts and the main spring to ensure that when it is greater than the auxiliary spring After the active load, the main and auxiliary springs work together to meet the design requirements of composite stiffness. The force of the first main spring of the few variable cross-section main and auxiliary springs is complex, not only bears vertical loads, but also bears torsional loads and longitudinal loads. Therefore, the end straight section of the first main spring is ...

AI Technical Summary

Problems solved by technology

However, due to the non-isomorphic straight section of the end of the main spring, the unequal length of the main and auxiliary springs, the deformation of the main and auxiliary springs, and the analysis and calculation of internal forces are very complicated, therefore, for the end-contact type few-piece parabolic variable-section main and auxiliary springs , the composite stiffness checking method has not been given before

Although some people have previously given the design and calculation methods of a few variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed a variable-section leaf spring in "Automotive Engineering", 1992 (Volume 14) No. 3 The design and calculation method is mainly for the design and calculation of the small-piece parabolic variable-section leaf spring with the same structure at the end. Requirements for Composite Stiffness Check Calculation

At present, most engineering designers ignore the influence of unequal lengths of the main and auxiliary springs, and directly superimpose the stiffness of the main spring and the auxiliary spring for approximate checking calculations, which cannot meet the requirements for the precise design of the end-contact type parabolic variable-section main and auxiliary springs and Requirements for accurate calculation of its composite stiffness

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