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Split design method for thickness of automobile leaf spring

A technology of leaf spring and automobile steel plate, applied in the direction of low internal friction spring, spring/shock absorber, leaf spring, etc., can solve the problems that cannot meet the design requirements, and achieve the effect of simple and reliable analytical design method and accurate design

Inactive Publication Date: 2012-12-12
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there are no accurate and reliable design methods for the thickness of leaf springs at home and abroad. Most of them first use experience or drawing methods to determine the thickness, and then after repeated tests and modifications, the required thickness is finally determined, which cannot meet modern requirements. The Design Requirements of Lean Automobiles

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  • Split design method for thickness of automobile leaf spring
  • Split design method for thickness of automobile leaf spring

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Example 1: Required value of leaf spring stiffness for a truck suspension ,width b = 40mm, total length L =1400mm, elastic modulus of leaf spring material .

[0019] The split design method of the automobile leaf spring thickness that the embodiment of the present invention provides, concrete steps are as follows:

[0020] （1） Calculation of Equivalent Thickness of Leaf Spring in Single-piece Design

[0021] According to the stiffness value required by the automobile suspension for the leaf spring , total length of leaf spring L = 1400mm and leaf spring width b =40mm, determine the equivalent thickness of the single-piece design leaf spring =23.4mm;

[0022] （2） Design of the thickness of each leaf spring

[0023] 1) Determine the first slice ( i =1) The length and design thickness of the leaf spring : The length of the first leaf spring is =1400mm, according to equivalent thickness Select Design Thickness in Leaf Spring Series =15mm, go to the n...

Embodiment 2

[0035] Example 2: Required value of leaf spring stiffness for a small truck suspension ,width b = 40mm, total length L =1200mm, elastic modulus of leaf spring material .

[0036] Using the design steps in Example 1, the split design results can be obtained. The length and thickness of the first piece to the fourth piece are as follows:

[0037] L 1 =1200mm, h 1 =10mm;

[0038] L 2 =1120mm, h 2 =10mm;

[0039] L 3 =1040mm, h 3 =10mm;

[0040] L 4 =960mm, h 4 =10mm.

[0041] A vertical load of 375N is applied to both ends of the four leaf springs obtained by splitting, and the vertical deformation is 10.01mm, that is, the design stiffness of the leaf spring is 74925.1N / m, and the relative error with the required value of the leaf spring stiffness is only 0.10 %, the experimental results show that the four leaf springs obtained by the split design can meet the stiffness requirements of the suspension leaf springs.

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Abstract

The invention relates to a split design method for the thickness of an automoible leaf spring, belonging to the field of an automobile suspension spring. The performance of the suspension is influenced directly by the thickness of each strip of the automobile suspension leaf spring; however, an accurate and reliable design method is not available currently. According to the method provided by the invention, the total equivalent thickness of the leaf spring is designed according to the requirement for the suspension to the spring stiffness, then the split design is carried out on the equivalent thickness of the leaf spring with a superposition principle, thereby obtaining the thickness of the leaf spring with unequal length for each strip. The split design method for the thickness of the automobile leaf spring provided by the invention is simple and reliable, and can satisfy the requirement for the accurate design of the thickness of the automobile leaf spring. The split design method can be used for designing vehicle suspension leaf springs.

Description

technical field [0001] The invention relates to an automobile suspension leaf spring, in particular to a design method for the thickness of the automobile leaf spring. Background technique [0002] Leaf spring is the most widely used elastic element in automobile suspension. It is composed of several alloy spring pieces of equal width but unequal length (the thickness can be equal or not). An approximately equal strength elastic beam. The thickness of the leaf spring directly affects the stiffness and deformation of the leaf spring, thereby affecting the handling stability and ride comfort of the car. With the rapid development of the automobile industry, higher requirements are put forward for the design of vehicle leaf springs. However, at present, there are no accurate and reliable design methods for the thickness of leaf springs at home and abroad. Most of them first use experience or drawing methods to determine the thickness, and then after repeated tests and modific...

Claims

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Application Information

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IPC IPC(8): F16F3/02F16F1/18
Inventor 周长城李红艳毛少坊
Owner SHANDONG UNIV OF TECH
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