Intensity Checking Method of Non-equal Deviation Frequency Type Three-stage Gradient Stiffness Leaf Spring

Abstract

The invention relates to a method for checking the strength of a non-equal bias frequency type three-stage gradually changing stiffness leaf spring, belonging to the technical field of vehicle suspension leaf springs. The present invention can be based on the structural parameters of the main springs of each piece and the secondary springs of each level, the allowable stress, the clamping distance of the saddle bolt, each contact load, the maximum load, and the stress intensity of the non-equal frequency-biased three-stage gradient stiffness leaf spring Check it out. It can be seen from the loading stress test of the prototype that the strength checking method of the non-equal-bias frequency type three-stage gradient stiffness leaf spring provided by the present invention is correct, and accurate and reliable stress strength checking calculation values ​​can be obtained, which provides a basis for strength checking Reliable calibration method. Using the method can improve the design level, quality and reliability of the product and the driving safety of the vehicle; at the same time, it can reduce the design and test cost and the product maintenance cost, and accelerate the product development speed.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking the strength of a non-equal bias frequency type three-stage gradient stiffness leaf spring. Background technique [0002] In order to meet the ride comfort of the vehicle under different loads, the main spring and auxiliary spring of the original one-stage gradient stiffness leaf spring can be split into two stages respectively, that is, a three-stage gradient stiffness leaf spring is used; at the same time, in order to meet the requirements of the main spring Stress intensity, usually through the initial tangent arc height of the main spring and the third-level auxiliary spring and the three-level gradual change gap, so that the third-level auxiliary spring can properly bear the load in advance, thereby reducing the stress of the main spring, that is, the non-equal frequency type three-level gradual change stiffness Leaf spring suspension, wherein the str...

AI Technical Summary

Problems solved by technology

However, due to the constraints of the equivalent thickness and maximum stress calculation of the overlapping parts of the leaf springs at all levels, according to the research data, there has been no strength checking method for non-equal frequency three-stage gradient stiffness leaf springs at home and abroad. , can not meet the root stress calculation, strength check and CAD software development requirements of non-equal frequency three-stage gradient stiffness leaf spring

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