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Design method for free tangent arc height of end reinforcement isostructural taper leaf spring

A technology of variable cross-section and leaf spring, applied in the design characteristics of spring/shock absorber, leaf spring, computer-aided design, etc. Complicated calculation of tightness and rigidity can achieve the effect of speeding up product development, reducing the cost of design development and testing, and improving the design level

Inactive Publication Date: 2018-06-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the information obtained, the calculation of the clamping stiffness of the few-piece parabolic variable-section leaf spring is very complicated due to the structure of the end reinforcement, etc., and it is affected by the free tangent arc height of each leaf spring and the assembly and clamping of each leaf spring. The initial tangent arc height of the spring, clamping stiffness, clamping end point force and pre-clamping stress are constrained by the relationship. Previously, no design method for the free tangent arc height of a small-piece variable-section leaf spring with a structure such as end reinforcement has been given.

Method used

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  • Design method for free tangent arc height of end reinforcement isostructural taper leaf spring
  • Design method for free tangent arc height of end reinforcement isostructural taper leaf spring
  • Design method for free tangent arc height of end reinforcement isostructural taper leaf spring

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Effect test

Embodiment 1

[0028] 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 of the saddle bolt clamping distance L 0 =50mm, the horizontal length of the oblique line segment Δl=30mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2 = L T -L 0 =525mm, elastic modulus E=200GPa. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 2 = 18mm, the end thickness h of the parabola segment 1p = 7mm, the thickness h of the straight section at each end 1 = 8mm. Thickness ratio of parabola segment β=h 1p / h 2 =0.3889, the thickness ratio of the oblique line segment γ=h 1 / h 1p = 1.1429. The horizontal distance l from the root of the oblique line segment to the end point of the leaf spring 1p = l 2 beta 2 =79.4mm, the length of the straight section at the end l 1 = l 1...

Embodiment 2

[0053] Embodiment two: the width b=60mm of a certain end reinforced equal structure few-piece parabolic variable-section leaf spring, and half the active length L T =575mm, half the length L of the straight section at the root 0 =50mm, the horizontal length of the oblique line segment Δl=30mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2 = L T -L 0 =525mm, elastic modulus E=200Gpa. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 2 = 16mm, the end thickness h of the parabola segment 1p = 7mm, the thickness h of the straight section at the end 1 = 8mm. The thickness ratio of the parabolic segment of each leaf spring β=h 1p / h 2 =0.4375, the thickness ratio of the oblique line segment γ=h 1 / h 1p = 1.1429. The horizontal distance l from the root of the oblique line segment to the end point of the leaf spring 1p = l 2 beta 2 = 100.5mm, the length of the st...

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Abstract

The invention relates to a design method for the free tangent arc height of an end reinforcement isostructural taper leaf spring, and belongs to the technical field of suspension taper leaf springs. In the design method, according to the number of leaf springs, the structural parameters of the leaf springs, the elasticity modulus and the design required values of the initial tangent arc height ofthe first leaf spring and pre-clamping stress of the leaf springs, the free tangent arc height of each leaf spring of the end reinforcement isostructural taper parabola leaf spring can be designed. Through prototype testing, it can be known that the design method for the free tangent arc height of the end reinforcement isostructural taper leaf spring is correct. By means of the method, it can be ensured that the initial tangent arc height of the first leaf spring and the pre-clamping stress of the leaf springs meet the design requirements, the product design level and reliability are improved,the service life is prolonged, and vehicle running safety is improved; and meanwhile, the product design and development and testing expenses are reduced, and the product development speed is increased.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for a vehicle suspension, in particular to a design method for the free tangent arc height 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 enhance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2228/06F16F2230/0082F16F2230/40F16F2238/02G06F30/15G06F30/17G06F30/20G06F2119/06
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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