Design Method for Gradual Gap of Two-Stage Main Spring Non-equal Deviation Frequency Leaf Spring with Gradual Stiffness

Abstract

The invention relates to a design method for a gradual-changing gap of a two-stage main spring type non-equal offset frequency gradual-rigidity-changing plate spring, and belongs to the technical field of suspension steel plate springs. The gradual-changing gap of the two-stage main spring type non-equal offset frequency gradual-rigidity-changing plate spring can be designed on the basis of curved surface height calculation according to structure parameters, the elastic modulus, the U-bolt clamping distance, contact loads of each time, the clamping rigidity of each stage, the rated load and the residual tangent arc height of all plate spring pieces. Through a prototype loading deflection test, it can be known that the design method for the gradual-changing gap of the two-stage main spring type non-equal offset frequency gradual-rigidity-changing plate spring is correct, and a reliable technical foundation is laid for plate spring design and CAD software development. By means of the design method, a reliable two-stage gradual-changing gap design value can be obtained, it is ensured that the design requirements for the plate spring contact loads and the suspension offset frequency are met, and the product design level and performance and the vehicle driving smoothness are improved; and meanwhile, the design and test cost can be reduced, and the product development speed is increased.

Description

Technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular a two-stage main spring type unequal frequency deviation type gradient stiffness leaf spring design method for the gradient gap. Background technique [0002] In order to further improve the driving comfort of the vehicle under half-load conditions, a two-stage main spring type gradient stiffness leaf spring can be used, that is, the main spring of the original one-stage gradient stiffness leaf spring is split into two-stage main springs; at the same time, in order to ensure the main spring The stress intensity of the spring usually passes 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 gap, so that the second-stage main spring and the auxiliary spring bear the load appropriately in advance, thereby reducing the first stage The stress of the main spring is a two-stage main spring type...

AI Technical Summary

Problems solved by technology

However, since the deflection calculation of the two-stage main spring type non-equal bias frequency gradient stiffness leaf spring is very complicated, and is restricted by the design of the initial tangent arc height of the leaf spring, the shape of the surface and the calculation of the height of the surface at any position, according to the data obtained, the previous The design method for the gradual gap of the two-stage main spring type non-equal bias frequency type gradient stiffness leaf spring has not been given, and most of them are determined through experiments and tests. Therefore, it cannot meet the rapid development of the vehicle industry and the modernization of suspension springs. CAD design requirements

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