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Matching design method for double-strengthened-end-portion non-isomorphic type variable-section plate spring pre-clamping stress

A reinforced end, non-isostructural technology, which is applied in the field of matching design method of pre-clamping stress of variable-section leaf springs with double-reinforced ends. Complicated calculations and other issues to achieve the effect of speeding up product development, reducing design and test costs, and improving design levels

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 information obtained, it is known that the calculation of the clamping stiffness of each leaf spring of the double-reinforced end non-equal variable-section leaf spring is very complicated, and is affected by the difference in the thickness square of the pre-clamping stress between the leaf springs. Due to calculation constraints, the matching design method for the pre-clamping stress of double-reinforced end non-equal structure variable-section leaf springs has not been given before.

Method used

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  • Matching design method for double-strengthened-end-portion non-isomorphic type variable-section plate spring pre-clamping stress
  • Matching design method for double-strengthened-end-portion non-isomorphic type variable-section plate spring pre-clamping stress
  • Matching design method for double-strengthened-end-portion non-isomorphic type variable-section plate spring pre-clamping stress

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: The width b=60mm of a parabolic variable-section leaf spring of a non-equal configuration at the end of a certain pair of reinforcements, 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 2 =18mm, the root thickness h of the parabolic segment of each leaf spring 2p =17mm, the end thickness h of the parabolic segment of each leaf spring 11p = 8mm, h 12p =...

Embodiment 2

[0052] Embodiment 2: The width b=60mm of a parabolic variable-section leaf spring of a non-equal configuration at the end of a certain pair of reinforcements, 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=4, the thickness h of the straight section at the root of each leaf spring 2 = 16mm, root thickness h of parabola segment 2p =15mm, the end thickness h of the parabolic segment of each leaf spring 11p = 7mm, h 12p =6.5mm, h 13p = 6mm, h 14p ...

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Abstract

The invention relates to a matching design method for double-strengthened-end-portion non-isomorphic type variable-section plate spring pre-clamping stress, and belongs to the technical field of suspension few-leaf variable-section plate springs. Matching design can be conducted on pre-clamping stress of various plate spring bodies of a double-strengthened non-isomorphic type parabola variable-section plate spring according to the number of the plate spring bodies, the structure parameters, the elasticity modulus and the rated loads of various plate spring bodies and the allowable stress of the first plate spring body under the rated load. It can be known from the development test that the provided matching design method for double-strengthened-end-portion non-isomorphic type variable-section plate spring pre-clamping stress is correct, the accurate and reliable matching design value of the pre-clamping stress of the various plate spring bodies can be obtained, and a reliable technology foundation is laid for free tangent line arc height design of various plate spring bodies. By utilization of the method, it can be ensured that the pre-clamping force of the various plate spring bodies meets the design requirement, the product design level and reliability and vehicle driving safety are improved, and the product service life is prolonged; and meanwhile, the product design and test expense is reduced, and the product development speed is increased.

Description

technical field [0001] The invention relates to a vehicle suspension with a few pieces of variable-section leaf springs, in particular to a design method for matching the pre-clamping stress of double-reinforced end non-equal structure variable-section leaf springs. 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 great attention to it, and it has been widely used in vehicle suspension systems. In order to strengthen the strength of the leaf spring, an inclined root section is added between the straight section and the parabolic section at the root of the leaf spring. An oblique section at the end is added be...

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 周长城赵雷雷于曰伟杨铖兆李晓晗梁宇通毛少坊汪晓杨腾飞
Owner SHANDONG UNIV OF TECH
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