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Matched design method for pre-clamping stress of equal-structure few-leaf oblique-line type variable-cross-section leaf springs

A slanted, variable-section technology, applied in the design characteristics of springs/shock absorbers, leaf springs, computer-aided design, etc., can solve the problems of less-slanted oblique variable-section leaf springs that have not been given equal configuration, Achieve the effect of speeding up product development, reducing design development and testing costs, and improving design level

Inactive Publication Date: 2018-07-20
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 research data, due to the constraints of the calculation of the pre-clamping stress difference between the leaf springs, the matching design method for the pre-clamping stress of the equal-structured few-slash-line variable-section leaf spring has not been given before.

Method used

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  • Matched design method for pre-clamping stress of equal-structure few-leaf oblique-line type variable-cross-section leaf springs
  • Matched design method for pre-clamping stress of equal-structure few-leaf oblique-line type variable-cross-section leaf springs
  • Matched design method for pre-clamping stress of equal-structure few-leaf oblique-line type variable-cross-section leaf springs

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: Half of the active length L of a certain structure with few oblique line type variable-section leaf springs T =575mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =50mm, the width b of the leaf spring=60mm, and the modulus of elasticity E=200GPa. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 2 = 12 mm. Rated load P N =7000N, the allowable stress of the first leaf spring under rated load [σ 1 ]=400MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the rated load and the allowable stress of the first leaf spring under the rated load, the effect of each leaf spring of the same structure with a few oblique line variable cross-section leaf springs Matching design for pre-clamping stress.

[0022] The matching design method of the pre-clamping stress of the equal-structure few-piece inclined-line type variable-section le...

Embodiment 2

[0035] Embodiment two: the width b=60mm of a certain construction formula few slices oblique line type variable-section leaf spring, the half action length L of each leaf spring T =575mm, modulus of elasticity E=200GPa, half length L of the straight section of the root clamped by saddle bolt 0 = 55mm. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 2 =14mm. Rated load P N =13000N, the allowable stress of the first leaf spring under rated load [σ]=400MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the rated load and the allowable stress of the first leaf spring under the rated load, each leaf spring of the structure with few oblique lines and variable cross-section leaf springs is pre-loaded. Clamping stress matching design.

[0036] Using the same matching design method and steps as in Embodiment 1, the matching design of the pre-clamping stress of each leaf spring of the ...

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Abstract

The invention relates to a matched design method for pre-clamping stress of equal-structure few-leaf oblique-line type variable-cross-section leaf springs and belongs to the technical field of hangerbracket few-leaf variable-cross-section leaf springs. According to the number of the leaf springs, structural parameters, the rated load and the permissible stress of the first leaf spring under the rated load , matched design is carried out on the pre-clamping stress of all the leaf springs of the equal-structure few-leaf oblique-line type variable-cross-section leaf springs. According to a prototype testing, the matched design method for the pre-clamping stress of equal-structure few-leaf oblique-line type variable-cross-section leaf springs is correct. Accurate and reliable pre-clamping stress matched design value of each leaf spring is achieved, so that a reliable technical foundation is laid for design of free tangent arc height of each leaf spring. The pre-clamping stress of each equal-structure few-leaf oblique-line type variable-cross-section leaf spring is ensured to meet the design requirements, so that reliability and design level of products, and the safety of vehicle traveling are improved. At the same time, design and testing expenses of products are lowered and product development speed is accelerated.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for vehicle suspension, in particular to a matching design method for the pre-clamping stress of the equal-structure small-piece oblique-line variable-section leaf spring. Background technique [0002] With the rapid development of energy saving and lightweight of automobiles, leaf springs with small variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no or small friction between sheets, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers are highly concerned. Compared with the parabolic variable-section leaf spring, the inclined-line variable-section leaf spring has simpler processing technology and required equipment. Therefore, the equal-construction small-piece oblique-shaped variable-section leaf spring has been widely used in vehicle suspension syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02G06F17/50
CPCF16F3/023F16F2230/40F16F2238/022G06F30/17G06F30/20G06F2119/06
Inventor 赵雷雷周长城邵明磊于曰伟汪晓杨腾飞杨铖兆梁宇通李晓晗
Owner SHANDONG UNIV OF TECH
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