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Design method for limit deflections of end part contact type less-leaf parabola type main and auxiliary springs

A parabolic, contact-type technology, applied to leaf springs, design optimization/simulation, and spring components composed of several springs, etc., can solve problems such as difficult analysis and calculation, complex structures and contact types

Inactive Publication Date: 2017-01-04
SHANDONG UNIV OF TECH
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Problems solved by technology

However, due to the complex structure and contact types of the end-contact type few-piece parabolic variable-section primary and secondary springs, it is very difficult to analyze and calculate it. According to the information obtained, no reliable end-contact type has been given at home and abroad. Design Method of Limiting Deflection of Few Parabolic Primary and Secondary Springs

Method used

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  • Design method for limit deflections of end part contact type less-leaf parabola type main and auxiliary springs
  • Design method for limit deflections of end part contact type less-leaf parabola type main and auxiliary springs
  • Design method for limit deflections of end part contact type less-leaf parabola type main and auxiliary springs

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Embodiment

[0067] Embodiment: A certain end-contact type few-piece parabolic variable-section primary and secondary springs are composed of 2 main springs and 1 secondary spring, that is, the number of main reeds is m=2, and the number of secondary reeds is n=1. The main spring parameters are: half length L M =575mm, width b=60mm, thickness h of the straight section at the root 2M =11mm, half of the installation distance l 3 =55mm, the distance l from the root of the parabola segment to the end point of the main spring 2M =L M -l 3 =520mm, modulus of elasticity E=200GPa, thickness h of the straight section at the end of the first main spring 1M1 =7mm, the thickness ratio of the parabola segment β 1 =h 1M1 / h 2M =0.64, the thickness h of the straight section at the end of the second main spring 1M2 =6mm, the thickness ratio of the parabola segment β 2 =h 1M2 / h 2M =0.55; the auxiliary spring parameter is: half length L A =525mm, width b=60mm, thickness h of the straight sectio...

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Abstract

The invention relates to a design method for the limit deflections of end part contact type less-leaf parabola type main and auxiliary springs, and belongs to the technical field of suspension steel plate springs. According to the method, the limit deflections of the end part contact type less-leaf parabola type main and auxiliary springs can be designed according to the structural parameters, the elastic modulus, the maximum allowable safe stress and the free length of a limiting block of all leaf springs. A prototype loading transformation test shows that the design method for the limit deflections of the end part contact type less-leaf parabola type main and auxiliary springs is correct, an accurate and reliable limit deflection design value can be obtained, and a reliable technological basis is laid for the design of the end part contact type less-leaf parabola type main and auxiliary springs and the development of CAD software. By the use of the method, the design level, the quality and the performance of a product can be improved, and the vehicle running smoothness can be improved; meanwhile, the cost for product design and test 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 limiting the deflection of an end contact type few-piece parabolic primary and secondary spring. Background technique [0002] With the rapid development of energy saving, comfort, light weight and safety of automobiles, leaf springs with variable cross-sections have light weight, high material utilization, no friction or small friction between sheets, low vibration and noise, and long service life. Advantages, it is increasingly concerned by vehicle suspension experts, manufacturers and vehicle manufacturers, and has been widely used in vehicle suspension systems. Usually, in order to meet the design requirements of processing technology, stress intensity, stiffness and lug thickness, a small number of variable cross-section leaf springs are processed into parabolic, oblique, root reinforced, end reinforced, and both ends reinforced types. The structural f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50F16F3/02F16F1/18
CPCF16F1/185F16F3/023G06F30/17G06F30/23
Inventor 周长城邵明磊袁光明汪晓杨腾飞王凤娟于曰伟
Owner SHANDONG UNIV OF TECH
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