Matching design method for pre-clamping stress of double-reinforced-root non-equal-thickness variable-cross-section leaf springs

A non-equal thickness, variable section technology, applied in spring/shock absorber design features, computer-aided design, design optimization/simulation, etc. The problems of tight stress and clamping stiffness are complicated to calculate, so as to reduce the design and test costs, improve the design level, and speed up the development speed.

Inactive Publication Date: 2018-08-17
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 information obtained, the calculation of the clamping stiffness of each leaf spring of the double-reinforced root non-equal-thickness variable-section leaf spring is very complicated, and the pre-clamping stress between the leaf springs after assembly and clamping is very complicated. Constrained by the calculation of the difference in thickness squares, the matching design method for the pre-clamping stress of double-reinforced root non-equal-thickness variable-section leaf springs has not been given before.

Method used

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  • Matching design method for pre-clamping stress of double-reinforced-root non-equal-thickness variable-cross-section leaf springs
  • Matching design method for pre-clamping stress of double-reinforced-root non-equal-thickness variable-cross-section leaf springs
  • Matching design method for pre-clamping stress of double-reinforced-root non-equal-thickness variable-cross-section leaf springs

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: The width b=60mm of a certain double-strengthened root non-equal-thickness parabolic variable-section leaf spring, and half the effective length L T =575mm, modulus of elasticity E=200GPa, half length L of the straight section of the root clamped by saddle bolt 0 =50mm, horizontal length Δl of oblique section at the end 1 =30mm, the horizontal length of the oblique line section at the root Δl 2 =40mm, the horizontal distance l from the root of the oblique line section at the root to the end point of the leaf spring 2 =L T -L 0 =525mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2p = l 2 -Δl 2 =495mm. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 21 =18.5mm, h 22 = 18mm, h 23 =17.5mm; root thickness h of parabola segment 21p = 17.5 mm, h 22p = 17mm, h 23p = 16.5mm, the end thickness h of the parabola segment 11p = 8mm, h 12p = 7mm...

Embodiment 2

[0052] Embodiment 2: the width b=60mm of a certain double-strengthened root non-equal-thickness parabolic variable-section leaf spring, and half the effective length L T =575mm, modulus of elasticity E=200GPa, half length L of the straight section at the root of the saddle bolt clamping distance 0 =50mm, horizontal length Δl of oblique section at the end 1 =30mm, the horizontal length of the oblique line section at the root Δl 2 =40mm, the horizontal distance l from the root of the oblique line section at the root to the end point of the leaf spring 2 =L T -L 0 =525mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2p = l 2 -Δl 2 =495mm. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 21 = 17mm, h 22 = 16.5mm, h 23 = 16mm, h 24 =16mm; root thickness h of parabola segment 21p = 16mm, h 22p = 15.5mm, h 23p = 15mm, h 24p = 15mm; end thickness h of the parabo...

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Abstract

The invention relates to a matching design method for the pre-clamping stress of double-reinforced-root non-equal-thickness variable-cross-section leaf springs, and belongs to the technical field of suspension taper leaf springs. According to the matching design method, matching design can be carried out on the pre-clamping stress of each of the double-reinforced-root non-equal-thickness parabolicvariable-cross-section leaf springs according to the number of the leaf springs, the structure parameters of each leaf spring, the elasticity modulus, the rated load and the allowable stress of a first leaf spring under the rated load; through a prototype test, the matching design method for the pre-clamping stress of the double-reinforced-root non-equal-thickness variable-cross-section leaf springs is accurate, accurate and reliable matching design values of the pre-clamping stress of each leaf spring can be obtained, and a reliable technical foundation can be laid for the design of the camber height of a free tangent line; by means of the method, the pre-clamping stress of each leaf spring can be ensured to meet the design requirements, the design level and the reliability of products can be improved, the service life of the products can be prolonged, the driving safety of vehicles can be improved; and meanwhile, the design and test cost of the products can be lowered, and the product development speed can be increased.

Description

technical field [0001] The invention relates to the matching design method of the pre-clamping stress of the plate spring of the vehicle suspension with few pieces of variable section and non-equal thickness variable section leaf spring with double reinforced roots. Background technique [0002] With the implementation of automobile energy-saving and lightweight policies, the leaf springs with variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no friction 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 requirements of complex stress on the first leaf spring and strengthen the strength of the leaf spring, a double-reinforced non-equal root can be used Thick variable-section leaf spring...

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 石莹周长城赵雷雷杨腾飞杨铖兆李晓晗梁宇通于曰伟
Owner SHANDONG UNIV OF TECH
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