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First-grade rigidity-gradual-changed plate spring equal-thickness main spring free tangent line arc height design method

A leaf spring and rigidity technology, applied in the design field of free tangent arc height of thick main spring, can solve problems such as unsatisfactory, unprovided accurate and reliable design method, free tangent arc height, etc., to improve design level, reduce design and test cost, and the effect of speeding up development

Inactive Publication Date: 2018-07-13
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, due to the calculation of the equivalent thickness of the equal-thickness main spring, the maximum stress, the difference in pre-clamping stress between each piece of equal-thickness main spring, and the calculation of the pre-clamping stress of each piece of equal-thickness main spring Constrained by matching design, no accurate and reliable design method has been given for the free tangent arc height of each piece of the main spring with equal thickness of the first-level gradient stiffness leaf spring, which cannot meet the rapid development of vehicles and the modernization of the first-level gradient stiffness leaf spring CAD design requirements

Method used

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  • First-grade rigidity-gradual-changed plate spring equal-thickness main spring free tangent line arc height design method
  • First-grade rigidity-gradual-changed plate spring equal-thickness main spring free tangent line arc height design method
  • First-grade rigidity-gradual-changed plate spring equal-thickness main spring free tangent line arc height design method

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Embodiment 1

[0035] Embodiment 1, the width b=60mm of a leaf spring with gradually changing stiffness, the modulus of elasticity E=200GPa, half the effective length L 1T =525mm, half the length L of the straight section of the root clamped by the saddle bolt 0 = 50mm. The number of main reeds is n=3, the thickness of each main spring of equal thickness is h=8mm, and the half of the active length of each main spring is L 1T =525mm, L 2T=450mm, L 3T = 350mm. The number of auxiliary reeds m = 2 pieces, the thickness h of each auxiliary reed A1 = h A2 =13mm, half of the working length of each auxiliary spring is L A1T =250mm,L A2T = 150 mm. Start contact load P k =1900N, rated load P N =7500N, the allowable stress of the first main spring under rated load [σ 1 ]=400MPa. The design value H of the initial tangent arc height of the first main spring after assembly and pre-clamping gC1 = 100 mm. According to the number of main reeds and auxiliary reeds, the structural parameters of e...

Embodiment 2

[0067] Embodiment two, the width b=63mm of a leaf spring with gradually changing stiffness, the modulus of elasticity E=200GPa, half the length L of the straight section of the root clamped by the saddle bolt 0 = 55mm. The number of main reeds is n=2, the thickness of each main spring of equal thickness is h=9mm, and half of the active length of each main spring is L 1T =525mm,L 2T = 450mm. The number of auxiliary reeds m = 2 pieces, the thickness h of each auxiliary reed A1 = h A2 =13mm, half of the working length of each auxiliary spring is L A1T =250mm,L A2T = 150mm. Start contact load P k =1800N, rated load P N =7000N, allowable stress of the first main spring under rated load [σ 1 ]=400MPa. The design requirement value H of the initial tangent arc height of the first main spring after assembly and clamping gC1 =95mm. According to the number of main reeds and auxiliary reeds, the structural parameters of each leaf spring, elastic modulus, initial contact load, ...

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Abstract

The invention relates to a first-grade rigidity-gradual-changed plate spring equal-thickness main spring free tangent line arc height design method, and belongs to the technical field of suspension rigidity-gradual-changed plate springs. According to the numbers of main springs and secondary springs, structural parameters of all the plate springs, elastic modules, initial contact load, rated load,allowed stress of a first main spring under the rated load and a design requested value of an initial tangent line arc height of the clamped first main spring, the free tangent line arc height of each equal-thickness main spring of first-grade rigidity-gradual-changed plate springs is designed. Known from prototype testing, the first-grade rigidity-gradual-changed plate spring equal-thickness main spring free tangent line arc height design method is correct; and an accurate and reliable designed value of a free tangent line arc height of each equal-thickness main spring can be obtained. The method can guarantee the initial tangent line arc height of the first main spring and the clamping stress of each main spring to meet the design requirement so as to improve the product design level, the product reliability and the product service life, meanwhile, reduces the design and test costs, and accelerates the product development speed.

Description

technical field [0001] The invention relates to a method for designing the free tangent arc height of a thick main spring such as a plate spring with gradually changing stiffness of a vehicle suspension, especially a leaf spring with gradually changing stiffness. Background technique [0002] In order to meet the design requirements of the ride comfort of the vehicle under different loads, one-stage gradient stiffness leaf springs can be used, that is, a certain primary and secondary spring gradient gap is designed between the last main spring and the first main and secondary springs. Among them, The most widely used is the one-stage gradient stiffness leaf spring of the equal-thickness main spring type. In order to improve the strength and service life of the main spring, through the different free tangent arc heights of each main spring, ensure that the initial tangent arc height and clamping stiffness characteristics of the main spring after assembly and pre-clamping meet...

Claims

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Application Information

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IPC IPC(8): F16F3/02G06F17/50
CPCF16F3/023F16F2228/066F16F2230/40F16F2238/022G06F30/17G06F30/20G06F2119/06
Inventor 周长城汪晓于曰伟梁勋乾杨腾飞杨铖兆李晓晗刘灿昌梁宇通
Owner SHANDONG UNIV OF TECH
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