Matching design method for pre-clamping stress of non-equal-thickness main spring of two-stage progressive stiffness leaf spring

A non-equal thickness, pre-clamping technology, applied in the design characteristics of spring/shock absorber, computer-aided design, design optimization/simulation, etc., can solve problems such as unsatisfactory, improve design level, speed up development speed, reduce Effect of Design and Test Costs

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 researched data, due to the restriction of the calculation of the equivalent thickness of the overlapping part of the non-equal thickness main spring root and the stress-thickness difference between the various non-equal thickness main springs, no accurate and reliable calculation has been given before at home and abroad. The matching design method of the pre-clamping stress of the two-stage gradient stiffness leaf spring with non-equal thickness main spring cannot meet the requirements of the rapid development of vehicles and the modern CAD design of the suspension two-stage gradient stiffness leaf spring

Method used

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  • Matching design method for pre-clamping stress of non-equal-thickness main spring of two-stage progressive stiffness leaf spring
  • Matching design method for pre-clamping stress of non-equal-thickness main spring of two-stage progressive stiffness leaf spring
  • Matching design method for pre-clamping stress of non-equal-thickness main spring of two-stage progressive stiffness leaf spring

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Effect test

Embodiment 1

[0031] Embodiment 1, the width b=60mm of a certain two-stage gradually changing stiffness leaf spring, the thickness of each main spring is not equal, that is, the main spring is superimposed with non-equal thickness, half the length L of the straight section of the root clamped by the saddle bolt 0 = 50mm. The number of main reeds n=3 pieces, the thickness h of each main spring 1 = 9mm, h2 = h 3 =8mm, half of the active length of each main spring is L 1T =525mm,L 2T =450mm, L 3T = 350mm. The number of sheets of the first secondary spring m 1 = 1 piece, the thickness h of the first secondary spring A11 = h 4 =13mm, the working length of half of the first secondary spring is L A11T =250mm. The number of pieces of secondary secondary spring m 2 = 1, the thickness h of the secondary secondary spring A21 =13mm, half the working length of the secondary secondary spring is L A21T = 150mm. The first contact load P k1 =1900N, the second contact load P k2 =2640N, rated l...

Embodiment 2

[0055] Embodiment 2, the width b=63mm of a certain two-stage gradient stiffness leaf spring, the thickness of each main spring is not equal, that is, the main spring is superimposed with non-equal thickness, half the length L of the straight section at the root of the saddle bolt clamped 0 = 55mm. The number of main reeds n=2 pieces, the thickness h of each piece of non-equal thickness main spring 1 = 10mm, h 2 =9mm, half of the active length of each main spring is L 1T =525mm, L 2T = 450mm. The number of sheets of the first secondary spring m 1 = 1 piece, the thickness h of the first secondary spring A11 = h 4 =13mm, the working length of half of the first secondary spring is L A11T =250mm. The number of pieces of secondary secondary spring m 2 = 1, the thickness h of the secondary secondary spring A21 =13mm, half the working length of the secondary secondary spring is L A21T = 150 mm. The first contact load P k1 =1800N, the second contact load P k2 =2600N. Rat...

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Abstract

The invention relates to a matching design method for pre-clamping stress of a two-stage gradual stiffness plate spring with a non-equal-thickness main spring, belonging to the technical field of suspension gradual stiffness plate springs. The invention can carry out matching design on the pre-clamping stress of each non-equal-thickness main spring of the two-stage gradual change rigidity leaf spring according to the number of the main leaf spring, the number of the secondary leaf springs at each stage, the structural parameters of each leaf spring, the first and second contact loads, the rated load and the allowable stress of the first leaf main spring under the rated load. Through the prototype test, it can be seen that the matching design method for the pre-clamping stress of the non-equal-thickness main spring of the two-stage graded stiffness leaf spring provided by the invention is correct, which lays a reliable technical foundation for the design of the free tangent arc height of the non-equal-thickness main spring of the two-stage graded stiffness leaf spring. The method can ensure that the pre-clamping stress of each non-equal-thickness main spring meets the design requirements and improve the design level, reliability, service life and vehicle driving safety of products. At the same time, reduce the cost of product design and testing and speed up product development.

Description

technical field [0001] The invention relates to a plate spring with gradually changing stiffness of a vehicle suspension, in particular a matching design method for the pre-clamping stress of a main spring with two stages of gradually changing stiffness. Background technique [0002] In order to meet the design requirements of vehicle ride comfort under different loads, two-stage gradient stiffness leaf springs can be used, that is, between the last leaf of the main spring and the first leaf of the first auxiliary spring, and between the last leaf of the first auxiliary spring and the first leaf of the auxiliary spring. Between the first pieces of the second-stage auxiliary reed, there are two stages of gradual gaps. In order to meet the complex force requirements of the first main spring, non-equal thickness main springs are usually used, that is, the thickness of the first main spring is greater than that of other main springs; and in order to improve the reliability and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023F16F2226/04F16F2230/0035F16F2230/40F16F2238/022G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城杨腾飞于曰伟赵雷雷梁勋乾李晓晗杨铖兆周继磊梁宇通
Owner SHANDONG UNIV OF TECH
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