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Design method for free tangent arc height of diagonal taper-leaf-spring with non-isomorphic end

A non-isomorphic, slash-shaped technology, applied in the design characteristics of spring/shock absorber, computer-aided design, design optimization/simulation, etc., can solve the problem of non-isomorphic slash-shaped variable-section leaf springs that have not been given at the end Design method, complex calculation of clamping stiffness, etc.

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 researched data, the calculation of the clamping stiffness of the leaf spring with non-isostructural oblique lines and variable cross-section is very complicated, and is affected by the free tangent arc height of each leaf spring and the structural parameters, root gaskets and end joints. The thickness of the gasket at the top, the clamping stiffness of each leaf spring after assembly and clamping, the initial tangent arc height, the force at the clamping end point and the pre-clamping stress have not been given before. Design Method of Free Tangent Arc Height of Inclined Variable Section Leaf Spring

Method used

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  • Design method for free tangent arc height of diagonal taper-leaf-spring with non-isomorphic end
  • Design method for free tangent arc height of diagonal taper-leaf-spring with non-isomorphic end
  • Design method for free tangent arc height of diagonal taper-leaf-spring with non-isomorphic end

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Embodiment 1

[0028] Example 1: half of the working length L of a non-equal-structured oblique-line type variable-section leaf spring at a certain end T =550mm, half L of the straight section of the root clamped by the saddle bolt 0 =50mm, 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 of the straight section at the end is h 11= 8mm, h 12 = 7mm, h 13 = 6mm. The thickness ratios of the oblique segments of each leaf spring are β 1 =0.6667,β 2 = 0.5833, β 3 = 0.50. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6mm. 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 of the pre-clamping stress of each leaf spring is σ 1 =-39.46, σ 2 = 0MPa, σ 3 = 39.46 MPa. According to the number of leaf springs, the structural parameters of each leaf spring,...

Embodiment 2

[0057] Embodiment 2: the width b=60mm of a non-equal few-piece slanted-line variable-section leaf spring at a certain end, and half the effective length L T =550mm, 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 n=4, 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 11 = 9mm, h 12 = 8mm, h 13 = 7mm, h 14 = 6mm. The thickness ratios of the oblique segments of each leaf spring are β 1 = 0.6429, β 2 = 0.5714, β 3 =0.50,β 4 = 0.4286. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6mm. The design requirement value H of the initial tangent arc height of the first leaf spring after assembly and clamping gC1 =95mm, the pre-clamping stress design requirements of each leaf spring are respectively σ 1 =-24.68MPa, σ 2 =-8.23MPa, σ 3 =8.23MPa, σ 4 = 24.68MPa. According to the number ...

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Abstract

The invention relates to a design method for a free tangent arc height of a diagonal taper-leaf-spring with a non-isomorphic end, and belongs to the technical field of suspension few taper leaf springs. Free tangent arc heights of various leaf springs of the few-diagonal-taper-leaf-spring with the non-isomorphic end are designed according the number of the leaf springs, structural parameters of the various leaf springs, elasticity modulus, thicknesses of root and end spacers, and design requirement values of an initial tangent arc height of the first leaf spring and pre-clamping stresses of the various leaf springs. The test-bed testing shows that the design method for the free tangent arc height of the diagonal taper-leaf-spring with the non-isomorphic end provided by the invention is correct, and accurate and reliable design values of the free tangent arc heights can be obtained, so that a reliable technical method is provided for designing the free tangent arc heights of the variousdiagonal taper-leaf-springs. By utilizing the method, the design level and the reliability of the product as well as the vehicle travel safety are improved, meanwhile, the product design and test cost is reduced, and the product development speed is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension with a few variable-section leaf springs, in particular to a design method for free tangent arc height of variable-section leaf springs with non-isomorphic oblique lines at the ends. 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 oblique-shaped variable-section leaf spring has simpler processing technology and required equipment, so 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 ...

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 周长城于曰伟邵明磊赵雷雷杨腾飞汪晓李晓晗杨铖兆梁宇通
Owner SHANDONG UNIV OF TECH
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