Design method of all stages of gradually-changed gaps of high-strength three-stage gradually-changed-stiffness leaf spring

Abstract

The invention relates to a design method of all stages of gradually-changed gaps of a high-strength three-stage gradually-changed-stiffness leaf spring, and belongs to the technical field of vehicle suspension steel plate springs. According to the design method, all stages of gradually-changed gaps of the high-strength three-stage gradually-changed-stiffness leaf spring of can be designed according to the structure parameter, the elasticity modulus, the main spring clamping stiffness, the main spring and all-stage auxiliary spring composite clamping stiffness, the rated load and the rated load remaining tangent arc height required value of each leaf spring. Through prototype testing, the design method of all stages of gradually-changed gaps of the high-strength three-stage gradually-changed-stiffness leaf spring is right, and the reliable technological basis is laid for designing the high-strength three-stage gradually-changed-stiffness leaf spring. By means of the method, the product design level, quality and performance can be improved, it is guaranteed that the design requirements for the gradually-changed load, the gradually-changed stiffness, the suspension offset frequency and the rated load remaining tangent arc height are met, and the vehicle travelling smoothness and safety are improved; and meanwhile, the design and testing 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 each level of gradual change clearance of a high-strength three-level gradual change stiffness leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength three-stage gradient stiffness leaf springs can be used to meet the design requirements of suspension gradient stiffness and suspension bias frequency under different loads, and further improve vehicle ride comfort. Among them, there are three levels of gradual change gaps between the main spring and the secondary springs at all levels, including: the first level of gradual change gap between the main spring and the first level of secondary springs, the first level of secondary springs and the second level of secondary springs. The second-level gradual gap between, the third-level gradual gap between the second-level auxiliary spring and the third-lev...

AI Technical Summary

Problems solved by technology

The gap between the main and auxiliary springs at each level of the high-strength three-level gradient leaf spring is not only related to the design calculation of the initial tangent arc height of the main spring, but also related to the calculation of the initial surface shape of the main spring and the auxiliary springs at all levels. However, due to the high-strength three-level The calculation of the deflection of the gradient leaf spring and the initial state shape and surface calculation of the main spring and the auxiliary springs at all levels is very complicated, not only related to the structure and load of the main spring and the auxiliary springs at all levels, but also related to the contact load. Therefore, according to the According to the data, there is no reliable design method for the gradual change gap at all levels of the high-strength three-level gradient stiffness leaf spring at home and abroad at present.

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