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The Design Method of Limiting Deflection of End Non-Isostructured Leaf Spring with End Reinforcement

A reinforced, non-isostructural technology, applied in the direction of leaf spring, spring, calculation, etc., can solve the problems of difficult analysis and calculation, complex structure type of leaf spring, etc., to improve product design level, reduce design and test costs, speed up The effect of product development speed

Inactive Publication Date: 2018-03-16
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex structure type of end-reinforced few-leaf variable-section leaf springs, it is very difficult to analyze and calculate them. According to the research data, there has not been a reliable end non-equal structure few-leaf end at home and abroad. Design Method of Limiting Deflection of Reinforced Leaf Spring

Method used

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  • The Design Method of Limiting Deflection of End Non-Isostructured Leaf Spring with End Reinforcement
  • The Design Method of Limiting Deflection of End Non-Isostructured Leaf Spring with End Reinforcement
  • The Design Method of Limiting Deflection of End Non-Isostructured Leaf Spring with End Reinforcement

Examples

Experimental program
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Embodiment 1

[0026] Example 1: Half the length L of each leaf spring of a certain few-piece end-reinforced variable-section leaf spring M =575mm, width b=60mm, modulus of elasticity E=200GPa, thickness h of the straight section at the root 2M =11mm, half of the installation distance l 3 =55mm, the length of the oblique line segment Δl=30mm, the distance l from the root of the parabola segment to the end point of the spring 2M =L M -l 3 =520mm; end thickness h of the parabolic segment of the first leaf spring 1Mp1 =6mm, that is, the thickness ratio of the parabola segment β 1 = h 1Mp1 / h 2M =0.55, the distance l from the end of the parabola segment to the end point of the spring 1Mp1 = l 2M beta 1 2 =157.30mm, the thickness h of the straight section at the end 1M1 =7mm, that is, the thickness ratio of the oblique line segment γ M1 = h 1M1 / h 1Mp1 =1.17, the length l of the straight section at the end 1M1 = l 1Mp1 -Δl=127.30mm, the free length L of the limit block xw = 15 mm...

Embodiment 2

[0043] Embodiment 2: Half the length L of each leaf spring of a certain few-piece end-reinforced variable-section leaf spring M =600mm, width b=60mm, modulus of elasticity E=200GPa, thickness h of the straight section at the root 2M =12mm, half of the installation distance l 3 =60mm, the length of the oblique line segment Δl=30mm, the distance l from the root of the parabola segment to the end point of the spring 2M =L M -l 3 =540mm; end thickness h of the parabolic segment of the first leaf spring 1Mp1 =7mm, that is, the thickness ratio of the parabola segment β 1 = h 1Mp1 / h 2M =0.58, the distance l from the end of the parabola segment to the end point of the spring 1Mp1 = l 2M beta 1 2 =181.66mm, the thickness h of the straight section at the end 1M1 =8mm, that is, the thickness ratio of the oblique line segment γ M1 = h 1M1 / h 1Mp1 =1.14, the length l of the straight section at the end 1M1 = l 1Mp1 -Δl=151.66mm, the free length L of the limit block xw = 12...

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Abstract

The invention relates to a design method for limiting deflection of an end non-isostructural few-piece end reinforced leaf spring, belonging to the technical field of suspension leaf springs. According to the structural parameters, elastic modulus, maximum allowable safety stress and free length of the limit block of each leaf spring, the present invention can design the limit deflection of the few end reinforced leaf springs with non-isomorphic ends. Through the prototype load deformation test, it can be seen that the design method of the limit deflection of the end non-isostructural few-piece end reinforced leaf spring provided by the present invention is correct, and an accurate and reliable design value of the limit deflection can be obtained. The design of the isomorphic few-piece end-reinforced leaf spring and the development of CAD software have laid a reliable technical foundation. The method can improve the product design level, quality and performance, and the ride comfort of the vehicle, and at the same time, reduce the cost of product design and test and test, and accelerate the speed of product development.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for limiting the deflection of a leaf spring with a non-equal structure and a few end-reinforced end portions. Background technique [0002] With the rapid development of energy saving, comfort, light weight and safety of automobiles, leaf springs with variable cross-sections have light weight, high material utilization, no friction or small friction between sheets, low vibration and noise, and long service life. Advantages, it is increasingly concerned by vehicle suspension experts, manufacturers and vehicle manufacturers, and has been widely used in vehicle suspension systems. Usually, in order to meet the design requirements of processing technology, stress intensity, stiffness and lug thickness, a small number of variable cross-section leaf springs are processed into parabolic, oblique, root reinforced, end reinforced, and both ends reinforced types. In add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F1/18G06F19/00
CPCF16F1/185G16Z99/00
Inventor 周长城王凤娟刘灿昌邵明磊汪晓杨腾飞赵雷雷
Owner SHANDONG UNIV OF TECH