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Simulation calculation method for initial tangent arc heights of unequally-thick main springs of two-stage gradual-rigidity leaf springs

A technology of non-uniform thickness and leaf springs, which is applied in the field of simulation algorithm of the initial tangent arc height of thick main springs, can solve the problem that accurate and reliable two-stage gradient stiffness leaf springs with non-uniform thickness main springs cannot be satisfied. Gradient rigidity plate springs and other problems, to reduce design and test costs, improve design level, speed up the effect of development

Inactive Publication Date: 2018-07-10
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 research data, due to the constraints of the simulation calculation of the initial curvature radius of the first main spring after assembly and clamping, the accurate and reliable simulation of the initial tangent arc height of the two-stage gradient stiffness leaf spring with non-equal thickness main spring has not been given before. The experimental algorithm cannot meet the requirements of the rapid development of vehicles and the modern CAD design of the two-stage gradient stiffness leaf spring of the suspension

Method used

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  • Simulation calculation method for initial tangent arc heights of unequally-thick main springs of two-stage gradual-rigidity leaf springs
  • Simulation calculation method for initial tangent arc heights of unequally-thick main springs of two-stage gradual-rigidity leaf springs
  • Simulation calculation method for initial tangent arc heights of unequally-thick main springs of two-stage gradual-rigidity leaf springs

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Effect test

Embodiment 1

[0025] Embodiment 1, the width b=60mm of a certain two-stage gradient stiffness leaf spring, the thickness of each main spring is not equal, that is, the non-equal thickness superimposed main spring, half the length L of the straight section of the root 0 = 50mm. The number of main reeds is n=3, and the thickness of each main spring is h 1 = 9mm, h 2 = h 3 =8mm, half of the active length of each main spring is L 1T =525mm,L 2T =450mm, L 3T =350mm, the design value of the free tangent arc height of each main spring is H g10 =94.9mm,H g20 =70.4mm, H g30 = 42.2 mm. The number of sheets of the first secondary spring m 1 = 1 piece, the leaf spring thickness h of the first secondary spring A11 =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 leaf spring thickness h of the secondary secondary spring A21 =13mm, half the working length of the secondary secondary spring is L A2...

Embodiment 2

[0046] 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 of the root clamped by the saddle bolt 0 = 55mm. The number of main reeds n=2 pieces, the thickness h of each main spring 1 = 10mm, h 2 =9mm, half of the active length of each main spring is L 1T =525mm,L 2T = 450mm, the design value of the free tangent arc height of each main spring is H g10 =90.0mm, H g20 =71.6mm. 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. Accordi...

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Abstract

The invention relates to a simulation calculation method for initial tangent arc heights of unequally-thick main springs of two-stage gradual-rigidity leaf springs, and belongs to the technical fieldof gradual-rigidity leaf springs of a suspension. Through the adoption of the method, according to the number of the main springs, structural parameters of each unequally-thick main spring and a design value of height of each free tangent arc, simulation calculation can be performed on the initial tangent arc height of each unequally-thick main spring after assembly and clamping of the two-stage gradual-rigidity leaf springs. Prototype testing proves that the simulation calculation method for the initial tangent arc heights of the unequally-thick main springs of the two-stage gradual-rigidityleaf springs is correct, accurate and reliable simulation calculation value of the initial tangent arc height of each unequally-thick main spring can be obtained, and a reliable technological basis islaid for simulation calculation of pre-clamping force. By means of the method, the initial tangent arc height of the first main spring after assembly and clamping can meet the design requirement, design level and reliability of the product as well as vehicle traveling safety can be improved, and service life of the product can be prolonged; meanwhile, design and testing expenses of the product are reduced, and the product development rate is increased.

Description

technical field [0001] The invention relates to a leaf spring with gradually changing stiffness of a vehicle suspension, especially a simulation algorithm for the initial tangent arc height of a main spring with two stages of gradually changing stiffness without equal thickness. 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 impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F30/20G06F2119/06
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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