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Design method for free tangent line arc heights of root straight-style unequal thickness stacked plate spring

A straight, non-uniform thickness technology, applied in computer-aided design, leaf springs, calculations, etc., can solve problems such as unsatisfactory suspension leaf springs, reduce design and test costs, improve design levels, and speed up product development speed effect

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, due to the restriction of the relationship between the free tangent arc height, the initial tangent arc height and the pre-clamping stress, no accurate and reliable free tangent line has been given for the straight root non-equal thickness superimposed leaf spring before. The design method of arc height cannot meet the requirements of rapid development of vehicles and modern CAD design of suspension leaf springs

Method used

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  • Design method for free tangent line arc heights of root straight-style unequal thickness stacked plate spring
  • Design method for free tangent line arc heights of root straight-style unequal thickness stacked plate spring
  • Design method for free tangent line arc heights of root straight-style unequal thickness stacked plate spring

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Embodiment 1

[0024] Example 1: The width of a flat root non-equal thickness superimposed leaf spring b=60mm, half the length of the root flat section L 0 =50mm, elastic modulus E=200GPa. The number of leaf springs n=5, the thickness of each leaf spring is h 1 = 9mm, h 2 = 8mm, h 3 = 8mm, h 4 =10mm, h 5 =10mm; half of the effective length of each leaf spring is L 1T =575mm, L 2T =525mm, L 3T =475mm, L 4T = 425mm, L 5T = 375mm. The design requirement value of the pre-clamping stress of each leaf spring is σ 1 =-22.12MPa,σ 2 =-14.0MPa, σ 3 =0MPa,σ 4 =8.96MPa,σ 5 = 17.92MPa. The design requirement value H of the initial tangent arc height of the first leaf spring after the leaf spring is assembled and clamped gC1 = 100mm. According to the number of leaf springs, the structural parameters of each leaf spring, the modulus of elasticity, the initial tangent arc height of the first leaf spring after assembly and clamping, and the design requirements for the pre-clamping stress of each leaf spring,...

Embodiment 2

[0050] Example 2: The width of a flat root non-uniform thickness superimposed leaf spring b=60mm, half the length of the root flat section L 0 =50mm, elastic modulus E=200GPa; the number of leaf springs n=4, the thickness of each leaf spring is h 1 =10mm, h 2 = 9mm, h 3 = 9mm, h 4 =9mm; half of the effective length of each leaf spring is L 1T =575mm, L 2T =525mm, L 3T =475mm, L 4T = 425mm, L 5T = 375mm. 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 = -44.20MPa, σ 2 =-18.19Mpa, σ 3 = 18.19Mpa, σ 4 =54.56MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the initial tangent arc height of the first leaf spring after assembly and clamping, and the design requirements for the pre-clamping stress of each leaf spring, the root The free tangent arc height H of...

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Abstract

The invention relates to a design method for free tangent line arc heights of a root straight-style unequal thickness stacked plate spring, and belongs to the technical field of suspension steel platesprings. According to the design method, the free tangent line arc heights of all plate spring bodies of the root straight-style unequal thickness stacked plate spring can be designed according to the number of the plate spring bodies, the structural parameters of all the plate spring bodies, the elasticity modulus, the initial tangent line arc height of the first assembled and clamped plate spring body and the pre-clamping stress design required values of all the plate spring bodies. As can be known through prototype testing that the design method for the free tangent line arc heights of theroot straight-style unequal thickness stacked plate spring is correct, and a reliable technical method is provided for designing the free tangent line arc heights of all the plate spring bodies. By adoption of the method, the effect that the initial tangent line arc height of the assembled and clamped first plate spring body and the pre-clamping stresses of all the plate spring bodies meet the design requirements can be guaranteed, the design level of the product is increased, reliability is improved, service life is prolonged and vehicle travelling safety is improved. Meanwhile, the design and test expenses of the product are reduced and the development speed of the product is increased.

Description

Technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular a design method for the free tangent arc height of the flat root type non-equal thickness superimposed leaf spring. Background technique [0002] Multi-leaf superimposed leaf spring is a very widely used component in vehicle suspension springs. Among them, in order to ensure the clamping rigidity and reliability of the leaf spring and meet the high requirements of the initial tangent arc of the first leaf spring after assembly and clamping, The riding bolt assembly clamping section of each leaf spring is flattened and processed into a straight section; in order to meet the complex force requirements of the first leaf spring, the thickness of the first leaf spring is usually greater than that of the other leaf springs, that is, the root is flat. Straight unequal thickness superimposed leaf spring. In order to improve the service life and reliability of the leaf springs, each leaf sprin...

Claims

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Application Information

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IPC IPC(8): F16F1/18G06F17/50
CPCF16F1/18G06F30/17G06F2119/06
Inventor 周长城杨腾飞赵雷雷梁勋乾袁光明陈海真梁宇通李晓晗马驰骋
Owner SHANDONG UNIV OF TECH
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