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The Calculation Method of the Stress of Each Leaf of the End-Contacted Few-leaf End Reinforced Primary and Secondary Springs

A contact type, main and auxiliary spring technology, which is applied in the field of vehicle suspension leaf springs, can solve the problems such as the inability to meet the end-contact type, few-piece end-reinforced variable-section main and auxiliary springs, and the inability to provide stress analytical calculation formulas.

Inactive Publication Date: 2018-10-19
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, at home and abroad, most of the primary and secondary springs of end-contact type end-reinforced variable-section springs use finite element simulation software such as ANSYS to carry out stress numerical simulation on variable-section leaf springs with a given structure through solid modeling. A relatively reliable stress simulation value can be obtained. However, the finite element modeling and simulation analysis method can only perform numerical simulation verification on the leaf spring stress of a given structure and load, and cannot provide accurate stress analysis formulas, so it cannot meet the end contact requirements. Requirements for CAD design and software development of the modern design of main and auxiliary springs with few pieces and end reinforcements with variable cross-section

Method used

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  • The Calculation Method of the Stress of Each Leaf of the End-Contacted Few-leaf End Reinforced Primary and Secondary Springs
  • The Calculation Method of the Stress of Each Leaf of the End-Contacted Few-leaf End Reinforced Primary and Secondary Springs
  • The Calculation Method of the Stress of Each Leaf of the End-Contacted Few-leaf End Reinforced Primary and Secondary Springs

Examples

Experimental program
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Embodiment

[0063] Embodiment: the width b of a certain end contact type few-piece end reinforced variable cross-section primary and secondary springs = 60mm, half of the installation distance l 3 =55mm, length Δl of oblique line segment=30mm, elastic modulus E=200GPa. The number of main reeds m=2, half the length L of the main reed M =575mm, the thickness h of the straight section at the root of each main spring 2M =11mm, the distance l from the root of the parabolic segment of the main spring to the end point of the main spring 2M = L M -l 3 =520mm; end thickness h of the parabolic segment of the first main spring 1Mp1 =6mm, the thickness ratio of the parabola segment β 1 =h 1Mp1 / h 2M=0.55, the distance l from the end of the parabola segment to the end point of the main spring 1Mp1 = l 2M beta 1 2 =157.30mm, the thickness h of the straight section at the end 1M1 =7mm, the thickness ratio of the oblique line segment γ M1 =h 1M1 / h 1Mp1 =1.17, the length l of the straight ...

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Abstract

The invention relates to a method for calculating the stress of each sheet of the end-contact type few-piece end-reinforced primary and secondary springs, which belongs to the technical field of suspension leaf springs. According to the structural parameters, elastic modulus, active load of the auxiliary spring and the load of the main and auxiliary springs of each piece of main spring and auxiliary spring, the present invention can control each piece of main and auxiliary springs of the end-contact type few-piece end-reinforced main and auxiliary springs. The stresses at different positions of the secondary spring are calculated. Through example calculation and ANSYS simulation verification, it can be known that this method can obtain accurate and reliable stress calculation values ​​of each main spring and auxiliary spring at different positions; using this method to improve the design of the end-contact type few-piece end-reinforced main and auxiliary springs Level, product quality, performance and reliability, improve the ride comfort and safety of vehicles; reduce the quality and cost of suspension springs, at the same time, reduce product design and test costs, and speed up product development and design.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for calculating the stress of each leaf of a primary and secondary spring of an end-contact type with few-piece end-reinforced type. Background technique [0002] Leaf springs with variable cross-sections are widely used in vehicle leaf spring suspension systems due to their advantages of light weight, small inter-sheet friction, and low noise. In order to meet the design requirements of processing technology, stress intensity, stiffness and lug thickness, in the actual engineering application process, the small-piece variable-section leaf spring is usually designed as an end-contact type few-piece end-reinforced primary and secondary spring form. The stiffness of the main spring and the combined stiffness of the main and auxiliary springs should meet the requirements of the suspension characteristics, and the stress of each main spring and auxiliary spring at differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 周长城赵雷雷邵杰汪晓王凤娟袁光明于曰伟
Owner SHANDONG UNIV OF TECH
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