Checking method of the strength of each leaf of the non-end contact type few-leaf slash-line main and auxiliary springs

Abstract

The present invention relates to a non-end part contact few-leaf oblique line type master-slave spring intensity check method, and belongs to the suspension steel plate spring technology field. The method of the present invention can check the stress intensity of the master springs and the slave springs according to the structural parameters of the master springs and the slave springs, the elasticity modulus, the allowable stress, the slave spring work load, the maximum loads born by the master springs and the slave springs of a non-end part contact few-leaf parabola type variable cross-section master-slave spring. By the instance and the simulation verification, a non-end part contact few-leaf parabola type variable cross-section master-slave spring intensity check method provided by the present invention is correct, by the method, the accurate and reliable stress intensity check values of the master springs and the slave springs can be obtained, the design level of the non-end part contact few-leaf parabola type variable cross-section master-slave spring, the product quality and service life and the vehicle driving compliance can be improved, at the same time, the design and test costs also can be reduced, and the product development speed is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking the strength of each piece of a non-end contact type few-piece oblique main and auxiliary springs. Background technique [0002] Compared with multi-piece superimposed leaf springs, few-piece variable-section leaf springs have the advantages of saving materials, reducing unsprung mass, improving vehicle ride comfort and transportation efficiency, etc., which have attracted great attention from domestic and foreign vehicle experts, and have been carried out abroad. Widespread promotion and application. For a few-piece variable-section leaf spring, in order to meet the requirements of variable stiffness, it is usually designed as the main and auxiliary springs, and through the gap of the main and auxiliary springs, it is ensured that the main and auxiliary springs contact and work together after the load is greater than that of the auxiliary springs. Design...

AI Technical Summary

Problems solved by technology

For the designed non-end contact type primary and secondary springs with few oblique lines and variable cross-sections, the composite stiffness should meet the design requirements for vehicle ride comfort, and the strength should meet the service life and safety requirements of the suspension springs. The length of the main spring and the auxiliary spring of the external contact type few oblique line type variable cross-section main spring and the auxiliary spring are not equal, and the straight sections of the ends of each main spring are not of equal structure, and after the main and auxiliary springs are in contact, the main spring and auxiliary spring There is coupling between the deformation and the internal force of the spring. Therefore, the calculation of the maximum stress of each main spring and auxiliary spring of the non-end contact type few oblique line type variable cross-section main spring and auxiliary spring is very complicated. It has not been possible to give a simple and accurate calculation before. , a reliable non-end contact method for checking the strength of each piece of the primary and secondary springs with a small number of oblique lines

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