Computation method for deflection characteristic of two-stage mainspring type non-equal offset frequency gradient-rigidity plate spring

Abstract

The invention relates to a computation method for a deflection characteristic of a two-stage mainspring type non-equal offset frequency gradient-rigidity plate spring, and belongs to the technical field of suspension steel plate springs. According to the method provided by the invention, the deflection characteristic of the two-stage mainspring type non-equal offset frequency gradient-rigidity plate spring can be computed based on computation of each stage of clamping rigidity and twp stages of gradient clamping rigidity according to the structural parameters, the elasticity modulus, the u-bolt clamping distance and the contact load of each mainspring and auxiliary spring. ANSYS simulation and load deflection tests of an prototype show that the computation method for the deflection characteristic of the two-stage mainspring type non-equal offset frequency gradient-rigidity plate spring provided by the invention is correct, and a reliable technical basis is built for the design of the two-stage mainspring type non-equal offset frequency gradient-rigidity plate spring with high initial tangent sagitta and two-stage gradient gap. By using the method, reliable computed deflection values under different loads can be acquired, the design level, quality and performance of a product and driving smoothness of a vehicle can be improved; meanwhile, design 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 calculation method for the deflection characteristics of a two-stage main spring type non-equal bias frequency type gradient stiffness leaf spring. Background technique [0002] In order to further improve the driving comfort of the vehicle under half-load conditions, the main spring of the original one-stage gradient stiffness leaf spring can be split into two-stage main springs, that is, two-stage main spring type gradient stiffness leaf springs; at the same time, in order to ensure that the main The stress intensity of the spring, usually through the initial tangent arc height of the first-stage main spring, the second-stage main spring and the auxiliary spring, and the two-stage gradual change gap, so that the second-stage main spring and the auxiliary spring can properly bear the load in advance, thereby reducing the first-stage The stress of the main spring, that is, th...

AI Technical Summary

Problems solved by technology

However, due to the constraints of the two-stage gradient stiffness calculation, the deflection calculation of the two-stage main spring type unequal frequency gradient stiffness leaf spring is very complicated. Most of the calculation methods for the deflection characteristics of bias-frequency gradient-stiffness leaf springs are determined through experimental tests. Therefore, they cannot meet the rapid development of the vehicle industry and the modern CAD design requirements of suspension springs.

Images