Design method for thickness and length of each auxiliary spring of first-class rigidity-varying plate spring

Abstract

The invention relates to a design method for thickness and length of each auxiliary spring of a first-class rigidity-varying plate spring and belongs to the technical field of a suspension plate spring. According to the invention, the thickness and the length of each auxiliary spring of the first-class rigidity-varying plate spring are designed according to the structure parameter, mounting clamp interval, width, elastic modulus, allowable stress, clamping rigidity of main and auxiliary spring compound, starting contact load and rated load of each main spring. A test for prototype load deflection and clamp rigidity proves that the design method for the thickness and length of each auxiliary spring of the first-class rigidity-varying plate spring provided by the invention is correct and a reliable technological base is established for the design of the first-class rigidity-varying plate spring. The method can be utilized to acquire a reliable parameter design value of the auxiliary spring, guarantee the design requirement for the clamping rigidity of main and auxiliary spring compound and the stress intensity and increase the design level, performance and reliability of the first-class rigidity-varying plate spring and the vehicle driving smoothness and safety. Meanwhile, the design and test cost can be lowered and the development rate of the product is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for designing the thickness and length of each auxiliary spring of a leaf spring with gradually changing stiffness. Background technique [0002] In order to meet the design requirements of vehicle ride comfort under different loads, one-stage gradient stiffness leaf springs can be used, in which the thickness and number of secondary springs affect the composite clamping stiffness of the main and secondary springs, suspension bias frequency and vehicle ride comfort and driving safety, but also affect the stress intensity, reliability and service life of the leaf spring, that is, the thickness and length of each piece of the designed auxiliary spring should meet the design requirements of the composite clamping stiffness of the main and auxiliary springs and the stress intensity of the leaf spring . Since the design of the thickness and length of each leaf of the auxil...

AI Technical Summary

Problems solved by technology

Since the design of the thickness and length of each leaf of the auxiliary spring is not only related to the composite clamping stiffness, allowable stress and load of the main and auxiliary springs, but also related to the structural parameters and contact load of each leaf of the main spring, therefore, the thickness of each leaf of the auxiliary spring The design of the length and length is very complicated, and it is also restricted by key issues such as the clamping stiffness of the main and auxiliary springs, the maximum stress at the root of the auxiliary spring, and the maximum allowable thickness of the auxiliary spring. The design method of the thickness and length of the secondary leaf spring cannot meet the requirements of the rapid development of the vehicle industry and the development of modern CAD software for leaf springs with gradual stiffness.

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