Design method for the blanking length of the first leaf and auxiliary spring of the two-stage auxiliary spring type non-equal deviation frequency type gradient stiffness leaf spring

Abstract

The invention relates to a method for designing the cutting length of a first leaf and an auxiliary spring of a two-stage auxiliary spring type non-uniform bias frequency type gradient stiffness leaf spring, and belongs to the technical field of suspension leaf springs. According to the structure parameters of each leaf main spring and the first-stage and second-stage auxiliary springs, the clamping distance of the riding bolt, the elastic modulus, the initial tangent arc height of the main spring, and the design requirement value of the initial contact load, the auxiliary On the basis of the design of the initial tangent arc height of the spring, through the initial surface shape and the superposition calculation of the surface elements, the blanking length of the first leaf and the auxiliary spring of the two-stage auxiliary spring type unequal bias frequency gradient stiffness plate spring is designed. Through the blanking processing test of the prototype, it can be seen that the design method for the blanking length of the first leaf and the auxiliary spring of the two-stage auxiliary spring type non-uniform bias frequency type gradient stiffness plate spring provided by the present invention is correct, and it is the first piece of the auxiliary spring and the other pieces. The design of the blanking length of the auxiliary spring provides a reliable technical method; using this method, the accurate and reliable design value of the blanking length of the auxiliary spring at all levels can be obtained, and the material utilization rate and production efficiency can be improved.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the blanking length of the first leaf and auxiliary spring of a two-stage auxiliary spring type non-equal bias frequency type gradient stiffness leaf spring. Background technique [0002] In order to improve the design requirements of the ride comfort of the vehicle under the rated load, the auxiliary spring of the original one-stage gradual stiffness leaf spring is split and designed into two-stage auxiliary springs, that is, two-stage auxiliary springs with non-equal bias frequency type gradient stiffness plates are adopted. At the same time, due to the restriction of the strength of the main spring, the initial tangent arc height of the main spring, the initial tangent arc height of the first-stage auxiliary spring and the second-stage auxiliary spring, and the two-stage gradual change gap are usually used to make the auxiliary spring properly bear the loa...

AI Technical Summary

Problems solved by technology

However, due to the constraints of the calculation of the equivalent thickness of the overlapping part of the leaf spring root and the shape of the initial surface, according to the search data, it has not been possible to give the first leaf and auxiliary spring of the two-stage auxiliary spring type non-equal bias frequency type gradient spring. The blanking length design method, therefore, cannot meet the requirements of the rapid development of the vehicle industry and the modern CAD design and software development of suspension gradient stiffness leaf springs

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