Design method of initial tangent arc height of high-strength two-stage gradient stiffness leaf spring

Abstract

The invention relates to a method for designing tangent line arc heights of all stages of auxiliary springs of a high-strength two-stage plate spring with gradually-changing rigidity, and belongs to the technical field of plate springs of vehicle suspensions. According to the method for designing the tangent line arc heights of all the stages of auxiliary springs of the high-strength two-stage plate spring with gradually-changing rigidity, the initial tangent line arc heights of the two stages of auxiliary springs of the high-strength two-stage plate spring with the gradually-changing rigidity can be designed according to the structure parameters, the elasticity moduli, the contact loads, the idle loads and the rated loads of all main springs and all the auxiliary springs and required design values of residual tangent line arc heights under the rated loads of the main springs and the auxiliary springs. It can be known through simulation and prototype testing, the method for designing the tangent line arc heights of all the stages of auxiliary springs of the high-strength two-stage plate spring with gradually-changing rigidity is correct, and a reliable design technique is provided for designing the high-strength two-stage plate spring with the gradually-changing rigidity. By adoption of the method, accurate and reliable design values of the initial tangent line arc heights of all the stages of the auxiliary springs can be obtained, it is ensured that the design requirements for the contact loads and the gradually-changing rigidity are met, and the design level and the quality of products and the traveling smoothness of vehicles are improved; and meanwhile, design cost and testing cost can be reduced, and the development speed of the products is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the initial tangent arc height of secondary springs of each stage of a high-strength two-stage gradually changing stiffness leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength two-stage gradient stiffness leaf springs can be used for vehicle suspension, so as to further meet the design requirements of vehicle ride comfort and suspension gradient bias frequency under different loads. Among them, The initial tangent arc height H of the first and second secondary springs gA10 and H gA20 , not only affect the primary and secondary spring clearance, contact load, primary and secondary spring stress, gradual clamping stiffness and residual tangent arc height under rated load, but also affect suspension bias frequency and vehicle ride comfort and safety. However, due to the gradual contact between th...

AI Technical Summary

Problems solved by technology

However, due to the gradual contact between the main spring and the first and second auxiliary springs, the contact length and the gradual stiffness change with the load, the deflection of the main spring is not only related to the main spring and the first and second auxiliary springs It is related to the structural parameters, and also related to each contact load. Therefore, the deflection calculation of the high-strength two-stage gradient stiffness leaf spring is very complicated. According to the information found, no high-strength two-stage gradient stiffness leaf spring has been given before at home and abroad. The design method of the initial tangent arc height of secondary springs at all levels

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