Auxiliary spring rigidity design method for non-end-contact type few-leaf parabolic type main and auxiliary springs

A technology of stiffness design and parabola, which is applied to leaf springs, calculations, mechanical equipment, etc., can solve problems such as inability to obtain accurate and reliable stiffness design values ​​of secondary springs, failure to meet stiffness design requirements, and failure to meet precise design requirements of primary and secondary springs.

Active Publication Date: 2016-06-22
山东恒日悬架弹簧股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the non-isomorphic straight section of the end of the main spring, the unequal lengths of the main and auxiliary springs, the deformation of the main and auxiliary springs, and the analysis and calculation of internal forces are very complicated, therefore, for the non-end-contact few-piece parabolic variable-section main Auxiliary spring, the design method of auxiliary spring stiffness has not been given before
Although some people have previously given the design and calculation methods of a few variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed a variable-section leaf spring in "Automotive Engineering", 1992 (Volume 14) No. 3 The design and calculation method is mainly for the design and calculation of the small-piece parabolic variable-section leaf spring with the same structure at the end. Stiffness Design Requirements
At present, most engineering designers ignore the influence of the unequal length of the main and auxiliary springs, and directly subtract the stiffness of the main spring from the design requirement value of the composite stiffness to obtain the approximate design value of the stiffness of the auxiliary spring. Therefore, accurate and reliable stiffness of the auxiliary spring cannot be obtained. The design value cannot meet the precise design requirements of the non-end contact type few parabolic variable section primary and secondary springs

Method used

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  • Auxiliary spring rigidity design method for non-end-contact type few-leaf parabolic type main and auxiliary springs
  • Auxiliary spring rigidity design method for non-end-contact type few-leaf parabolic type main and auxiliary springs
  • Auxiliary spring rigidity design method for non-end-contact type few-leaf parabolic type main and auxiliary springs

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Embodiment 1

[0028] Embodiment 1: The width b of a non-end contact type few-piece parabolic variable-section leaf spring is 60 mm, half of the installation distance l 3 =55mm, modulus of elasticity E=200GPa; among them, the number of main reeds m=2, half the length L of the main spring M =575mm, the distance l from the root of the parabolic segment of each main spring to the end of the main spring 2M =L M -l 3 =520mm, the thickness h of the straight section at the root of each main spring 2M =11mm; the thickness h of the straight section at the end of the first main spring 11 =7mm, the thickness ratio of the parabolic segment of the first main spring to β 1 =h 11 / h 2M =0.64, the thickness h of the straight section at the end of the second main spring 12 = 6mm, the thickness ratio of the parabolic segment of the second main spring to β 2 =h 12 / h 2M =0.55; half length L of secondary spring A =375mm, the horizontal distance l between the auxiliary spring contact and the main spri...

Embodiment 2

[0047] Embodiment 2: The width b of a non-end contact type few-piece parabolic variable-section leaf spring is 60 mm, half of the installation distance l 3 =60mm, elastic modulus E=200GPa, wherein, the number of main reeds m=2, wherein, the half length L of the main spring M =600mm, the distance l from the root of the parabolic segment of the main spring to the end point of the main spring 2M =L M -l 3 =540mm; the thickness h of the straight section at the root of each main spring 2M =12mm; the thickness h of the straight section at the end of the first main spring 11 = 8mm, the thickness ratio of the parabolic segment of the first main spring to β 1 =h 11 / h 2M =0.67, the thickness ratio β of the parabolic segment of the second main spring 2 =h 12 / h 2M = 0.58. Half length L of secondary spring A =410mm, the horizontal distance l between the auxiliary spring contact and the main spring end point 0 =L M -L A =190mm, the composite stiffness design requirement valu...

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Abstract

The invention relates to an auxiliary spring rigidity design method for non-end-contact type few-leaf parabolic type main and auxiliary springs and belongs to the technical field of suspension steel plate springs. Auxiliary spring rigidity can be precisely analyzed and designed according to structural parameters of all main springs of the non-end-contact type few-leaf parabolic type main and auxiliary springs, the length of the auxiliary spring, elasticity modulus and auxiliary spring rigidity design required values of the main and auxiliary springs. It is verified that the auxiliary spring rigidity design method for the non-end-contact type few-leaf parabolic type main and auxiliary springs is correct, and a reliable design method is provided for auxiliary rigidity design of the non-end-contact type few-leaf parabolic type main and auxiliary springs. By means of the method, accurate and reliable auxiliary spring rigidity design values of the non-end-contact type few-leaf parabolic type main and auxiliary springs can be obtained, and accordingly the design level and performance of products and vehicle ride comfort can be improved. Meanwhile, product design and test cost is reduced, and development speed is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for designing the stiffness of a secondary spring of a non-end contact type few-piece parabolic primary and secondary spring. Background technique [0002] In order to meet the design requirements of variable stiffness of the vehicle suspension under different loads, a small number of primary and secondary springs with variable cross-sections are used, wherein a certain gap between the secondary spring contacts and the main spring is designed to ensure that when the spring is greater than the secondary spring After the applied load, the main and auxiliary springs work together to meet the design requirements of composite stiffness. The force of the first main spring of the few variable cross-section main and auxiliary springs is complex, not only bears vertical loads, but also bears torsional loads and longitudinal loads. Therefore, the end straight section of the firs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F1/20G06F17/50
CPCF16F1/20G06F30/17
Inventor 赵雷雷王炳超周长城汪晓王凤娟陈海真于曰伟
Owner 山东恒日悬架弹簧股份有限公司
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