Matching design method for pre-clamping stress of end non-iso-structured small-blade variable-section plate springs

A non-isostructural and variable-section technology, applied in the design characteristics of springs/shock absorbers, leaf springs, computer-aided design, etc., can solve problems such as the inability to meet the requirements of less suspensions and variable-section leaf springs, and speed up product development. , reduce design and test costs, improve the effect of design level

Inactive Publication Date: 2018-06-29
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the research data, due to the restriction of the calculation of the pre-clamping stress difference between the leaf springs, the accurate and reliable matching of the pre-clamping stress of the non-equal-structured leaf springs with small and variable cross-sections at the end has not been given before. The design method cannot meet the rapid development of vehicles and the requirements for modern CAD design of suspension leaf springs with few pieces and variable cross-sections

Method used

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  • Matching design method for pre-clamping stress of end non-iso-structured small-blade variable-section plate springs
  • Matching design method for pre-clamping stress of end non-iso-structured small-blade variable-section plate springs
  • Matching design method for pre-clamping stress of end non-iso-structured small-blade variable-section plate springs

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Effect test

Embodiment 1

[0028] Embodiment 1: the width b=60mm of a non-equal structure few-piece parabolic variable-section leaf spring at a certain end, and half the span L T =570mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =50mm, elastic modulus E=200GPa. The number of leaf springs is n=3, and the thickness of the straight section at the root of each leaf spring is h 2 = 18mm, the thickness h of the straight section at the end of each leaf spring 11 = 9mm, h 12 = h 13 = 8mm, the thickness ratio of the parabola segment β 1 = h 11 / h 2 = 0.5, β 2 = β 3 = h 12 / h 2 = h 13 / h 2 = 0.444. Rated load P N= 16000N, the allowable stress of the first leaf spring under rated load [σ 1 ]=400MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the rated load and the allowable stress of the first leaf spring under the rated load, the non-equal structure of the end of the parabolic variable-sectio...

Embodiment 2

[0053] Embodiment two: the width b=60mm of a non-equal structure few-piece parabolic variable-section leaf spring at a certain end, and half the span L T =570mm, the half length L of the straight section at the root of the saddle bolt clamping distance 0 =50mm, elastic modulus E=200GPa. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 2 = 16mm; the thickness h of the straight section at the end of each leaf spring 11 = 8mm, h 12 =h 13 =h 14 =7mm, the thickness ratio of the parabola segment β 1 =h 11 / h 2 = 0.5, β 2 = β 3 = β 4 =h 12 / h 2 = 0.4375. Rated load P N =16800N, the allowable stress of the first leaf spring under rated load [σ 1 ]=400MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the rated load and the allowable stress of the first leaf spring under the rated load, the non-equal structure of the end of the parabolic variable-section...

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Abstract

The invention discloses a matching design method for pre-clamping stress of end non-iso-structured small-blade variable-section plate springs, and belongs to the technical field of suspension small-blade variable-section plate springs. The method can perform matching design on the pre-clamping stress of each plate spring of the end non-iso-structured small-blade variable-section plate springs according to the number of the plate springs, structural parameters of each plate spring, elastic modules, rated load and allowable stress of the first plate spring under the rated load. Through prototypetesting, the matching design method for the pre-clamping stress of the end non-iso-structured small-blade variable-section plate springs is correct; accurate and reliable matched design values of thepre-clamping stress of each plate spring can be obtained; and reliable technological base is laid for free tangent line arc height design of each plate spring. The method can guarantee the pre-clamping stress of each plate spring to meet design requirements, improves the product design level, reliability and service life and the vehicle driving safety, meanwhile, reduces the product design and testing costs, and accelerates the product development speed.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for a vehicle suspension, in particular a matching design method for the pre-clamping stress of a small-piece variable-section leaf spring with non-equal structure at the end. Background technique [0002] With the implementation of automobile energy-saving and lightweight policies, the leaf springs with variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no friction or small friction between sheets, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers have paid close attention to it, and it has been widely used in vehicle suspension systems. In order to meet the complex force requirements of the end of the first leaf spring, the thickness and length of the end straight section of the first leaf spring are usually greater than the thickness and length of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/06F16F2230/0082F16F2230/40F16F2238/022G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城王凤娟赵雷雷汪晓杨腾飞杨铖兆张云山朱召辉石莹
Owner SHANDONG UNIV OF TECH
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