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Design method for free tangent arc height of equal-structure few-leaf oblique-line type variable-cross-section leaf spring

A slanted, variable-section technology, applied in the design features of springs/shock absorbers, leaf springs, computer-aided design, etc., can solve problems such as less-slanted oblique variable-section leaf springs that have not been given equal configuration

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

AI Technical Summary

Problems solved by technology

However, according to the research data, due to the constraints of the calculation of the pre-clamping stress difference between the leaf springs, the matching design method for the pre-clamping stress of the equal-structured few-slash-line variable-section leaf spring has not been given before.

Method used

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  • Design method for free tangent arc height of equal-structure few-leaf oblique-line type variable-cross-section leaf spring
  • Design method for free tangent arc height of equal-structure few-leaf oblique-line type variable-cross-section leaf spring
  • Design method for free tangent arc height of equal-structure few-leaf oblique-line type variable-cross-section leaf spring

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: Half of the active length L of a certain structure with few oblique line type variable-section leaf springs T =575mm, the half length L of the straight section of the saddle bolt clamping root 0 =50mm, leaf spring width b=60mm, elastic modulus E=200GPa. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 2 = 12mm, the thickness h of the straight section at the end 1 =7mm, the thickness ratio of the oblique line segment β=h 1 / h 2 = 0.5833. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6 mm. The design requirement value H of the initial tangent arc height of the first leaf spring after assembly and clamping gC1 =100mm, the design requirement value σ of the pre-clamping stress of each leaf spring 1 =-25.3MPa, σ 2 = 0MPa, σ 3 = 25.3MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the thickness of the root gasket and the...

Embodiment 2

[0051] Embodiment 2: The width b=60mm of the leaf spring of a certain configuration with few oblique lines and variable cross-section, and the modulus of elasticity E=200GPa. The number of leaf springs is n=4, half of the working length L of each leaf spring T =575mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =55mm, the thickness h of the straight section at the root of each leaf spring 2 = 14mm, the thickness h of the straight section at the end 1 =8mm, the thickness ratio of the oblique line segment β=h 1 / h 2 =0.5714. The design requirement value H of the initial tangent arc height of the first leaf spring after assembly and clamping gC1 =95mm, the design requirement value of the pre-clamping stress of each leaf spring is σ 1 =-31.12MPa, σ 2 =-10.37MPa, σ 3 =10.37MPa, σ 4 = 31.12 MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the thickness of the root gasket...

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Abstract

The invention relates to a design method for the free tangent arc height of an equal-structure few-leaf oblique-line type variable-cross-section leaf spring, and belongs to the technical field of suspension few-leaf variable-cross-section leaf springs. By means of the method, the free tangent arc heights of all leaf-spring leaves of the equal-structure few-leaf oblique-line type variable-cross-section leaf spring is designed according to the number of and structure parameters of the leaf-spring leaves, elastic modulus, the thicknesses of gaskets at the roots and the ends and design requirementvalues of the initial tangent arc height of the first leaf-spring leaf and pre-clamping stress of all leaf-spring leaves after assembling and clamping. It is known through prototype testing that thedesign method for the free tangent arc height of the equal-structure few-leaf oblique-line type variable-cross-section leaf spring is correct, and accurate and reliable design values of the free tangent arc heights of the leaf-spring leaves can be obtained. By means of the method, it can be ensured that the initial tangent arc height of the first leaf-spring leaf and pre-clamping stress of the leaf-spring leaves after assembling and clamping meet the design requirement, the design level and reliability of products are improved, and vehicle running safety is improved; and meanwhile, the productdesign and test cost is lowered, and the product development speed is increased.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for vehicle suspension, in particular to a design method for the free tangent arc height of the equal-structure small-piece inclined-line variable-section leaf spring. Background technique [0002] With the rapid development of energy saving and lightweight of automobiles, leaf springs with small variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no or small friction between sheets, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers are highly concerned. Compared with the parabolic variable-section leaf spring, the inclined-line variable-section leaf spring has simpler processing technology and required equipment. Therefore, the equal-construction small-piece oblique-shaped variable-section leaf spring has been widely used in vehicle suspension systems. ...

Claims

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Application Information

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IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/06F16F2230/0082F16F2230/40F16F2238/022G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 赵雷雷周长城邵明磊于曰伟汪晓杨腾飞杨铖兆梁宇通李晓晗
Owner SHANDONG UNIV OF TECH
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