Design method for tangent arc height of two-stage main spring type non-equivalent frequency gradient stiffness leaf spring

Abstract

The invention relates to a two-stage mainspring-type non-equal frequency-offset stiffness-graded leaf spring tangent arc height designing method, and belongs to the technical field of suspension leaf springs. According to the method, the two-stage mainspring-type non-equal frequency-offset stiffness-graded leaf spring tangent arc height can be designed according to structural parameters of all the leaf springs, elastic modulus, U-bolt clamping force, contact load at all times, clamping stiffness at all stages, rated load and designing required value of the remaining tangent arc height. Through the prototype loading deflection test, it can be seen that the designing method of the two-stage mainspring-type non-equal frequency-offset stiffness-graded leaf spring tangent arc height provided by the invention is correct, and a reliable technical method is provided for the initial tangent arc height designing. By using the method, the reliable initial tangent arc height designing value can be obtained; the designing level and performance of the leaf spring are improved; it is ensured that the designing requirements of the leaf spring contact load, stress intensity, gradient stiffness, suspension frequency-offset and vehicle riding comfort are met; and the designing and test costs can be reduced; the product development speed is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the tangent arc height 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 m...

AI Technical Summary

Problems solved by technology

However, because the deflection calculation of the two-stage main spring type non-equal deviation frequency gradient stiffness leaf spring is very complicated, according to the research data, it has not been possible to give the tangent arc of the two-stage main spring type non-equal deviation frequency type gradient stiffness leaf spring before. Most of the high-level design methods are determined through experiments and tests, so they cannot meet the rapid development of the vehicle industry and the modern CAD design requirements of suspension springs

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