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Design method for stiffness of auxiliary spring of non-end-contact few-leaf oblique-line type main-auxiliary spring

A stiffness design, contact technology, applied in the design characteristics of springs/shock absorbers, spring assemblies composed of several springs, leaf springs, etc. It is not given, and it is difficult to obtain the design value of the auxiliary spring stiffness, etc.

Active Publication Date: 2016-08-17
山东恒日悬架弹簧股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the end straight section of the non-end contact type few-piece oblique-line variable-section main spring is not isomorphic, and the lengths of the main and auxiliary springs are not equal, when the load is greater than the effective load of the auxiliary spring, the auxiliary spring contacts The deformation and internal force of the main spring and auxiliary spring are coupled when they are in contact with a place within the inclined line of the main spring. The analysis and calculation of the end force and deformation of each main spring and auxiliary spring are very complicated, and have not been given at home and abroad at present. Accurate Design Method for the Stiffness of the Secondary Spring and the Secondary Spring of the Non-end-contact Few-piece Oblique Type Variable-section Primary and Secondary Springs
In the past, the unequal lengths of the main and auxiliary springs were mostly ignored, and the main and auxiliary springs were approximately regarded as equal lengths, and the stiffness of the main spring was subtracted from the composite stiffness design requirements of the main and auxiliary springs to approximate the stiffness of the auxiliary springs. Therefore, it is difficult Accurate and reliable secondary spring stiffness design value can not meet the requirements of vehicle suspension for precise design of non-end contact type few-piece slanted-line variable-section main spring

Method used

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  • Design method for stiffness of auxiliary spring of non-end-contact few-leaf oblique-line type main-auxiliary spring
  • Design method for stiffness of auxiliary spring of non-end-contact few-leaf oblique-line type main-auxiliary spring
  • Design method for stiffness of auxiliary spring of non-end-contact few-leaf oblique-line type main-auxiliary spring

Examples

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Embodiment 1

[0029] Embodiment 1: The number of main reeds m=2 of a non-end contact type few-piece slanted-line variable-section main and auxiliary springs, wherein, half the length L of each main spring M =575mm, width b=60mm, elastic modulus E=200GPa, half of the installation distance l 3 =55mm, the distance l from the root of the oblique line section of the main spring to the end point of the main spring 2M =L M -l 3 =520mm; the thickness h of the straight section at the root of each piece of main spring 2M =11mm, the thicknesses of the straight sections at the end of the first main spring and the second main spring are h 11 = 7mm and h 12 =6mm, the thickness ratios of the oblique segments of the first main spring and the second main spring are respectively β 1 =h 11 / h 2M = 0.64 and β 2 =h 12 / h 2M = 0.55. Half length L of auxiliary spring A =375mm, the horizontal distance l between the contact point of the secondary spring and the end point of the main spring 0 =L M -L ...

Embodiment 2

[0047] Embodiment 2: The number of main reeds m=2 of a non-end contact type few-piece slanted-line variable-section primary and secondary springs, wherein, half the length L of each main spring M =600mm, width b=60mm, elastic modulus E=200GPa, half of the installation distance l 3 =60mm, the distance from the root of the oblique line section of the main spring to the end point of the main spring l 2M =L M -l 3 =540mm; the thickness h of the straight section at the root of each main spring 2M =12mm, the thicknesses of the straight sections at the end of the first main spring and the second main spring are h 11 = 8mm and h 12 =7mm, the thickness ratios of the oblique line segments of the first main spring and the second main spring are respectively β 1 =h 11 / h 2M = 0.67 and β 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 = 190 mm. The comp...

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Abstract

The invention relates to a design method for a stiffness of an auxiliary spring of a non-end-contact few-leaf oblique-line type main-auxiliary spring, and belongs to the technical field of suspension steel plate springs. The design method disclosed by the invention is capable of designing the stiffness of the auxiliary spring of the non-end-contact few-leaf oblique-line type main-auxiliary spring according to the structural parameters and elasticity modulus of each main spring of the non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring, the length of the auxiliary spring, and a composite stiffness design requirement value of the main-auxiliary spring. Through examples and experimental test, the design method for the stiffness of the auxiliary spring of the non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring, which is provided by the invention, is correct, an accurate and reliable design value of the stiffness of the auxiliary spring can be obtained, a reliable technical foundation is laid for a design for the auxiliary spring of the non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring, and the design level, product quality and performance, and vehicle running smoothness of the non-end-contact few-leaf oblique-line type variable-section main-auxiliary spring are improved by virtue of the method; and meanwhile, design and test expenses can also be reduced, and the development speed of products can be accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for designing the stiffness of an auxiliary spring of a non-end contact type few-piece oblique-line primary and secondary spring. Background technique [0002] For a few leaf springs with variable cross-section, in order to meet the requirements of variable stiffness, it is usually designed as the main and auxiliary springs, and through the gap between the main and auxiliary springs, it is ensured that after the load is greater than the effective load of the auxiliary springs, the main and auxiliary springs contact and work together. , to meet the design requirements of the vehicle suspension on the stiffness of the leaf spring under different load conditions. Since the first piece of the main spring with variable cross-section is subjected to complex forces, it not only bears the vertical load, but also bears the torsional load and the longitudinal load. Therefore, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/185F16F3/023F16F2228/06F16F2230/00G06F30/17
Inventor 于曰伟王炳超周长城赵雷雷汪晓安艳邵明磊
Owner 山东恒日悬架弹簧股份有限公司
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