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Calculation method for contact load of high-strength equal-bias frequency three-stage gradient stiffness leaf spring

A high-strength, leaf spring technology, applied in the field of vehicle suspension leaf springs, can solve problems such as the contact load checking method of high-strength equal-bias frequency three-level gradient stiffness leaf springs, and the complex calculation of main spring deflection, etc., to speed up The effect of product development speed, reduction of design and test costs, and improvement of design level

Inactive Publication Date: 2019-09-10
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the calculation of the deflection of the main spring is very complicated, according to the research data, there is no reliable checking method for the contact load of the high-strength equal-bias frequency three-stage gradient stiffness leaf spring at home and abroad.

Method used

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  • Calculation method for contact load of high-strength equal-bias frequency three-stage gradient stiffness leaf spring
  • Calculation method for contact load of high-strength equal-bias frequency three-stage gradient stiffness leaf spring
  • Calculation method for contact load of high-strength equal-bias frequency three-stage gradient stiffness leaf spring

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: The width b of a high-strength three-stage gradient stiffness leaf spring is 63 mm, half the clamping distance of the saddle bolt L 0 =50mm, elastic modulus E=200GPa. Clamping stiffness of main spring K M =51.44N / mm, composite clamping stiffness K of the main spring and auxiliary springs at all levels MA1 =75.41N / mm,K MA2 =144.46N / mm,K MA3 =172.9 N / mm. The design value of the initial tangent arc height of the main spring is H gM0 =114.1mm, the design value H of the initial tangent arc height of the first secondary spring gA10 = 21.1 mm. The number of sheets of the main spring is n=2, and the thickness of each sheet of the main spring is h 1 = h 2 =8mm; half of the active length of the first leaf of the main spring is L 1T =525mm, half of the clamping length L 1 = L 1T -L 0 / 2=500mm. 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 ...

Embodiment 2

[0044] Embodiment 2: The width of a high-strength equal-bias three-stage gradient stiffness leaf spring is b = 63mm, half of the clamping distance of the saddle bolt L 0 =50mm, elastic modulus E=200GPa. Clamping stiffness of main spring K M =51.44N / mm, the composite clamping stiffness of the main spring and auxiliary springs at all levels is K MA1 =75.67N / mm,K MA2 =138.29N / mm and K MA3 =181.93 N / mm. The initial tangent arc height H of the main spring gM0 =113.1mm, the initial tangent arc H of the first secondary spring gA10 = 22.8 mm. The number of sheets of the main spring is n=2, and the thickness of each sheet of the main spring is h 1 = h 2 =8mm, half of the effective length L of the first leaf of the main spring 1T =525mm, half of the clamping length L 1 = L 1T -L 0 / 2=500mm. Number of secondary reeds of the first stage n 1 = 1, thickness h A11 =8mm, half the working length L A11T =360mm, half of the clamping length L A11 = L A11T -L 0 / 2=335mm. Number...

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Abstract

The invention relates to a method for checking and calculating the contact load of a high-strength equal-bias frequency three-stage gradually changing stiffness leaf spring, belonging to the technical field of vehicle suspension leaf springs. The present invention can be based on the structural parameters of each leaf spring, the modulus of elasticity, the clamping stiffness of the main spring and its composite clamping stiffness with all levels of secondary springs, the initial tangent arc height of the main spring and the first level of secondary springs, and the relative height The contact load of the leaf spring with equal bias frequency and three grades of gradient stiffness is checked. Through example check calculation and prototype test, it can be seen that the checking calculation method of the contact load of the high-strength equal-bias frequency three-stage gradient stiffness leaf spring provided by the present invention is correct, and it is a characteristic simulation and verification of the high-strength equal-bias frequency three-stage gradient stiffness leaf spring A solid technical foundation has been laid. Using this method can ensure that the contact load meets the design requirements of the leaf spring, improve product design level, quality and performance, and vehicle ride comfort and safety; at the same time, reduce design and test costs and speed up product development.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking and calculating the contact load of a high-strength equal-bias frequency three-stage gradually changing stiffness leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength equal-bias frequency three-stage gradient leaf springs can be used to meet the design requirements that the suspension bias frequency remains unchanged under different loads and further improve vehicle ride comfort. The contact load of the three-stage gradual gap has an important influence on the deflection, stress, gradient stiffness, suspension bias frequency and vehicle ride comfort of the leaf spring, and for the simulation and verification of the characteristics of the leaf spring with a given design structure, the contact load must first be Carry out checking calculation, among them, the contact load checking calculation is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F30/20
Inventor 周长城汪晓马驰骋赵雷雷杨腾飞王凤娟邵明磊
Owner SHANDONG UNIV OF TECH