Design method of two-stage main spring type non-equal offset frequency gradual stiffness plate spring limiting deflection

Abstract

The invention relates to a design method of a two-stage main spring type non-equal offset frequency gradual stiffness plate spring limiting deflection, and belongs to the technical field of suspension steel plate springs. The two-stage main spring type non-equal offset frequency gradual stiffness plate spring limiting deflection can be designed on the basis of the two-grade gradual stiffness and largest allowed load calculation according to the thickness and wideness of each plate spring, the clamping stiffness in each grade, the contact load and the largest allowed stress. According to ANSYS simulation, loading deflection and stress tests of a prototype, the design method of the two-stage main spring type non-equal offset frequency gradual stiffness plate spring limiting deflection is correct. By means of the method, the accurate and reliable largest limiting deflection design value can be obtained, it is ensured that a limiting device actually achieves a protection effect on the plate springs under the impact load, the plate spring design level, quality and reliability and vehicle driving safety are improved, meanwhile, the product design and test cost is 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 design method for limiting deflection 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, the two-stage main...

AI Technical Summary

Problems solved by technology

However, due to the constraints of the calculation of the two-stage gradient stiffness and the maximum allowable load, the deflection calculation of the two-stage main spring type non-equal bias frequency gradient stiffness leaf spring is very complicated. The design method of the limit deflection of the main spring type non-equal bias frequency type gradient stiffness leaf spring is mostly determined through experiments and tests, so it cannot meet the rapid development of the vehicle industry and the modern CAD design requirements of suspension springs

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