Design method for end-reinforced non-isomorphic taper-leaf spring free tangent arc heights

A technology of non-equal structure and variable cross-section, which is applied in the design characteristics of spring/shock absorber, leaf spring, computer-aided design, etc. Strengthen the calculation of complex clamping stiffness of non-isomorphic parabolic variable-section leaf springs, etc.

Inactive Publication Date: 2018-09-28
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 information obtained, the calculation of the clamping stiffness of non-isostructural parabolic variable-section leaf springs due to the end reinforcement is very complicated, and it is affected by the free tangent arc height of each leaf spring and the initial stiffnes

Method used

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  • Design method for end-reinforced non-isomorphic taper-leaf spring free tangent arc heights
  • Design method for end-reinforced non-isomorphic taper-leaf spring free tangent arc heights
  • Design method for end-reinforced non-isomorphic taper-leaf spring free tangent arc heights

Examples

Experimental program
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Example Embodiment

[0028] Example one: the width of the non-isostructured parabolic variable cross-section leaf spring of a certain end strengthened b=60mm, half of the effective length L T =575mm, half the length of the straight section of the root clamped by the riding bolt L 0 =50mm, the horizontal length of the diagonal line Δl=30mm, and the elastic modulus E=200GPa. The number of leaf spring n=3, the thickness of the straight section of the root of each leaf spring h 2 =18mm, the horizontal distance from the root of the parabolic segment to the end point of the leaf spring l 2 =L T -L 0 =525mm; the end thickness of the parabolic section of each leaf spring h 11p = 8mm, h 12p =7mm, h 13p =6mm; the thickness of the flat end of each leaf spring h 11 = 9mm, h 12 = 8mm, h 13 =7mm; the thickness ratio β of the parabolic segment of each leaf spring 1 =h 11p / h 2 = 0.4444, β 2 =h 12p / h 2 = 0.3889, β 3 =h 13p / h 2 =0.3333, the thickness ratio of the diagonal line γ 1 =h 11 / h 11p = 1.1250, γ 2 =h 12 / h...

Example Embodiment

[0058] The second embodiment: the width of the non-isostructured parabolic variable cross-section leaf spring of a certain end strengthened b=60mm, half of the effective length L T =575mm, half the length of the straight section of the root clamped by the riding bolt L 0 =50mm, the horizontal length of the diagonal line Δl=30mm, and the elastic modulus E=200GPa. The number of leaf springs n=4, the thickness of the root flat section of each leaf spring is h 2 =16mm, the horizontal distance from the root of the parabolic segment to the end point of the leaf spring l 2 =L T -L 0 =525mm; the end thickness of the parabolic section of each leaf spring h 11p = 8mm, h 12p =7mm, h 13p = 6mm, h 14p =5mm, the thickness of the flat end of each leaf spring h 11 = 9mm, h 12 = 8mm, h 13 =7mm, h 14 = 6mm. The thickness ratio of the parabolic segment of each leaf spring β 1 =h 11p / h 2 =0.5, β 2 =h 12p / h 2 = 0.4375, β 3 =h 13p / h 2 = 0.375, β 4 =h 14p / h 2 =0.3125; the thickness ratio of the obl...

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Abstract

The invention relates to a design method for an end-reinforced non-isomorphic taper-leaf spring free tangent arc heights, and belongs to the technical field of suspension taper-leaf springs. Accordingto the design method, according to the number of leaf springs, the structure parameters of each leaf spring, the elasticity modulus, the thickness of a root-part gasket and an end-part gasket, the initial tangent arc height of the first leaf spring after assembling and clamping and the design requirement value of the pre-clamping stress of each leaf spring, the free tangent arc height of each leaf spring of the end-reinforced non-isomorphic parabolic type taper-leaf spring is designed. Through a prototype test, the design method for the end-reinforced non-isomorphic taper-leaf spring free tangent arc heights is proved to be accurate, and the accurate and reliable design values of the free tangent arc heights can be obtained. By using the method, the initial tangent arc height of the firstleaf spring and the pre-clamping stress of each leaf spring can be ensured to meet the design value, the design level and the reliability of a product and the driving safety of a vehicle are improved; and meanwhile, the design development cost and the test cost of the product are reduced, and the development speed is accelerated.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for a vehicle suspension, in particular to a design method for the free tangent arc height of a small-piece variable-section leaf spring with non-equal structure at the end. Background technique [0002] With the rapid development of energy saving and lightweight of automobiles, less leaf springs with 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 pay close attention to it, and it has been widely used in vehicle suspension systems. Among them, in order to meet the complex force requirements of the end of the leaf spring and the first piece, the end-reinforced non-isomorphic parabola can be used Shaped cross-section leaf springs, that is, adding a slanted line segm...

Claims

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Application Information

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IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/06F16F2230/0082F16F2230/40F16F2238/02G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城李晓晗于曰伟赵雷雷汪晓杨铖兆杨腾飞梁宇通石莹
Owner SHANDONG UNIV OF TECH
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