End-reinforced iso-structured small variable-section plate spring preclamping stress matching design method

A variable-section, pre-clamping technology, applied in the design features of springs/shock absorbers, leaf springs, computer-aided design, etc. It can reduce the design and test costs, improve the design level, and speed up the development speed by solving problems such as the complexity of stiffness calculation.

Inactive Publication Date: 2018-07-13
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 data obtained, the calculation of the clamping stiffness of the few-piece parabolic variable-section leaf spring with end reinforcement is very complicated, and it is affected by the pre-clamping stress of each leaf spring and the structure of the leaf spring, rated load, allowable Using the relationship between the stress and the maximum stress at the root, and the calculation constraints of the difference between the pre-clamping stresses of the leaf springs, the pre-clamping stress of the few-piece variable-section leaf springs with end reinforcements and other configurations has not been given before. Matched Design

Method used

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  • End-reinforced iso-structured small variable-section plate spring preclamping stress matching design method
  • End-reinforced iso-structured small variable-section plate spring preclamping stress matching design method
  • End-reinforced iso-structured small variable-section plate spring preclamping stress matching design method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: the width b=60mm of a certain end strengthened equal structure few-sheet parabolic variable-section leaf spring, and half the effective length L T =575mm, half the length L of the straight section of the root clamped by the saddle bolt 0 = 50mm. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 2 =18mm. Rated load P N = 16000N, 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, each leaf spring of a few-piece parabolic variable-section leaf spring is reinforced at the end. The pre-clamping stress of the spring is matched with the design.

[0022] The matching design method of the pre-clamping stress of the end reinforcement and other configurations of the few-piece variable-section leaf spring provi...

Embodiment 2

[0035] Embodiment 2: Half of the active length L of a certain end-reinforced and equal-construction few-piece parabolic variable-section leaf spring 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. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 2 = 16 mm. Rated load P N =17000N, the allowable stress of the first leaf spring under rated load [σ 1 ]=450MPa. 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 a few-piece parabolic variable-section leaf spring is reinforced at the end. The pre-clamping stress of the spring is matched with the design.

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

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Abstract

The invention relates to an end-reinforced iso-structured small variable-section plate spring preclamping stress matching design method, and relates to the technical field of suspension small variable-section plate springs. According to the number of plate springs, structural parameters of the plate springs, rated load and allowed stress of a first plate spring under the rated load, matching design is performed on preclamping stress of each plate spring of end-reinforced iso-structured small variable-section plate springs. Known from prototype testing, the end-reinforced iso-structured small variable-section plate spring preclamping stress matching design method is correct; and reliable technological base is laid for design of free tangent line arc height of each plate spring. The method can guarantee the preclamping stress of each plate spring to meet the design requirements so as to improve the product design level, the product reliability, the product service life and the vehicle driving safety, meanwhile, reduces the product design and test costs, and accelerates the product development speed.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for a vehicle suspension, in particular to a matching design method for the pre-clamping stress of a few-piece variable-section leaf spring of a structure such as end reinforcement. 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 have paid close attention to it, and it has been widely used in vehicle suspension systems. Among them, in order to meet the complex force requirements of the end of the leaf spring, the parabolic section of each leaf spring is parallel to the end. An oblique segment is added between the straight sections to enh...

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 周长城杨铖兆于曰伟赵雷雷汪晓杨腾飞梁宇通李晓晗刘灿昌
Owner SHANDONG UNIV OF TECH
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