Method for checking useful load of auxiliary springs of non-end contact diagonal main and auxiliary spring

Abstract

The invention relates to a method for checking a useful load of auxiliary springs of a non-end contact diagonal primary and auxiliary spring, and belongs to the technical field of suspension steel plate springs. The method comprises the following steps: firstly, determining an endpoint deformation coefficient and the half rigidity of each main spring, as well as a deformation coefficient Gx-CB of the contact point between an Nth main spring and the auxiliary spring at an oblique line segment according to a structural dimension and an elastic modulus of the diagonal variable cross-section main spring with non-isostructural end parts; then, checking the useful load of the auxiliary springs of the non-end contact few-leaf diagonal variable cross-section main and auxiliary spring according to the thicknesses of root straight sections of the main springs, Gx-CB of the Nth main spring, the half rigidity of each main spring and a design value of the clearance Delta between the main springs and the auxiliary springs. The simulated verification shows that an accurate checking value of the useful load of the auxiliary springs of the non-end contact diagonal main and auxiliary spring can be obtained by using the method, the design level and performance of products are improved, the vehicle running smoothness is improved, meanwhile, the design, manufacturing and test costs are reduced, and the 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 active load of a non-end contact oblique-line primary and secondary spring. Background technique [0002] Compared with multi-piece superimposed leaf springs, the small-piece variable-section leaf spring has reasonable force, balanced stress load, and saves materials, realizes vehicle weight reduction, reduces wheel dynamic load, improves vehicle driving safety, and saves fuel at the same time , improve the efficiency of vehicle transportation, have good economic and social benefits, and have been widely promoted and applied abroad. For 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, wherein, there is a certain gap between the main spring and the auxiliary spring at the position of the contact point with the auxiliary spring, whe...

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Problems solved by technology

Although some people have previously given the design and calculation method of a few inclined-line variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed the variable-section The design and calculation method of the leaf spring, this method is mainly for the design of the few oblique-shaped variable-section leaf springs with the same structure at the end. The design requirements of the spring cannot meet the requirements of the design of the non-end contact slash-shaped primary and secondary springs and the check calculation of the active load of the secondary springs.

The magnitude of the acting load of the auxiliary spring affects the ride comfort of the vehicle. However, due to the constraints of the deformation calculation theory of the main spring with a non-equal structure and a small oblique line at the end at any position, a simple, accurate and reliable method has not been given so far. Calculation method for the active load of the non-end contact oblique-line primary and secondary springs and secondary springs

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