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Design method of cutting length of each main spring of high-strength three-stage gradient stiffness leaf spring

A high-strength and stiffness technology, applied in the field of vehicle suspension leaf springs, can solve the problem of not giving high-strength three-stage gradient stiffness leaf springs and other problems

Inactive Publication Date: 2019-02-19
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the constraints of key issues such as the clamping stiffness of the main spring, the gradient stiffness, the calculation of the deflection of the main spring, the design of the initial tangent arc height of the main spring, and the calculation of the initial surface shape of the first main spring, no high-strength three-dimensional structure has been given at home and abroad. Design method of blanking length of each main spring of leaf spring with gradually changing stiffness

Method used

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  • Design method of cutting length of each main spring of high-strength three-stage gradient stiffness leaf spring
  • Design method of cutting length of each main spring of high-strength three-stage gradient stiffness leaf spring
  • Design method of cutting length of each main spring of high-strength three-stage gradient stiffness leaf spring

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Embodiment

[0059] Embodiment: the width b=63mm of a certain high-strength three-stage gradient stiffness leaf spring, half L of the saddle bolt clamping distance 0 =50mm, elastic modulus E=200GPa. The total number of pieces of the main and auxiliary springs N = 5, where the number of pieces of the main spring n = 2, the thickness of each piece of the main spring h 1 =h 2 =8mm; half of the active length of each main spring is L 1T =525mm, L 2T =450mm; half of the clamping length is L 1 = L 1T -L 0 / 2=500mm, L 2 = L 2T -L 0 / 2=425mm. The number of sheets of the first secondary spring n 1 = 1, thickness h A11 =8mm, half of the active length is L A11T =350mm, half of the clamping length is L A11 = L 3 = L A11T -L 0 / 2=325mm. The number of pieces of the secondary secondary spring n 2 =1, thickness h A21 =13mm, half of the active length is L A21T =250mm, half of the clamping length is L A21 = L 4 = L A21T -L 0 / 2=225mm. The number of sheets of the third secondary sprin...

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Abstract

The invention relates to a design method for the blanking length of each main spring of a high-strength three-stage gradually changing stiffness leaf spring, and belongs to the technical field of vehicle suspension leaf springs. The present invention can design the initial tangent arc height of the main spring and the initial surface shape of the first main spring according to the structural parameters of each main spring and auxiliary spring, the middle diameter of the lifting lug, the elastic modulus, the rated load and the residual tangent arc height of the rated load. On the basis of the calculation, the blanking length of each main spring of the high-strength three-stage gradient stiffness leaf spring is designed through the micro-element surface and superposition calculation. It can be seen from the test results of the blanking process of the prototype that the design method of the blanking length of each main spring of the high-strength three-stage gradient stiffness leaf spring provided by the present invention is correct, and the accurate and reliable blanking length of each main spring can be obtained The design value has laid a reliable technical foundation for the modern CAD design of high-strength three-stage gradient stiffness leaf springs; at the same time, using this method can save materials, improve production efficiency, and have significant economic benefits.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, especially a design method for the blanking length of each main spring of a high-strength three-stage gradually changing stiffness leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength three-stage gradient leaf springs can be used to meet the design requirements of suspension gradient stiffness and suspension bias frequency under different loads, and further improve vehicle ride comfort. , Whether the design of the blanking length of each main spring is accurate and reliable has an important impact on production efficiency and material saving. However, due to the constraints of key issues such as the clamping stiffness of the main spring, the gradual stiffness, the calculation of the deflection of the main spring, the design of the initial tangent arc height of the main spring, and the calculation of the initial surface shape of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F1/18G06F17/50
CPCF16F1/185G06F30/17
Inventor 周长城汪晓朱召辉袁光明杨腾飞王凤娟毛少坊
Owner SHANDONG UNIV OF TECH
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