The Design Method of the Root Thickness of the End-Contacted Few Parabolic Parabolic Variable Section Auxiliary Springs

A technology of root thickness and parabola, applied in the direction of leaf springs, springs, calculations, etc., can solve the problems of complex analysis and calculation of internal force of main and auxiliary springs, failure to meet design requirements, failure to give design methods, etc.

Active Publication Date: 2019-05-28
山东恒日悬架弹簧股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unequal structure of the straight section at the end of the main spring, the unequal lengths of the main and auxiliary springs, the deformation of the main and auxiliary springs, and the analysis and calculation of internal forces are very complicated, therefore, for the end-contact few-piece parabolic variable-section auxiliary spring The thickness of the straight section of the root has not been given a reliable design method before
Although some people have previously given the design and calculation methods of a few variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed a variable-section leaf spring in "Automotive Engineering", 1992 (Volume 14) No. 3 The design and calculation method is mainly for the design and calculation of the small-piece parabolic variable-section leaf spring with the same structure at the end. Thickness Design Requirements
At present, engineering designers mostly ignore the influence of unequal lengths of the main and auxiliary springs, and directly approximate the thickness of the root of the auxiliary spring according to the design method of the main spring. Accurate Design Requirements for Primary and Auxiliary Springs with Parabolic Variable Sections of Contact Few Plates

Method used

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  • The Design Method of the Root Thickness of the End-Contacted Few Parabolic Parabolic Variable Section Auxiliary Springs
  • The Design Method of the Root Thickness of the End-Contacted Few Parabolic Parabolic Variable Section Auxiliary Springs
  • The Design Method of the Root Thickness of the End-Contacted Few Parabolic Parabolic Variable Section Auxiliary Springs

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Embodiment 1

[0032] Embodiment 1: The width of the primary and secondary springs of a few-piece parabolic variable-section contact type at the end is b=60mm, the modulus of elasticity E=200GPa, half of the installation distance l 3 =55mm; Among them, the number of main reeds m=2, half the length L of each main spring M =575mm, the thickness h of the straight section at the root 2M =11mm, the horizontal distance l from the root of the parabola segment to the end point of the main spring 2M = L M -l 3 =520mm; Thickness h of the straight section at the end of the first main spring 11 =7mm, the thickness ratio of the parabolic segment of the first main spring to β 1 = h 11 / h 2M =0.64; the thickness h of the straight section at the end of the second main spring 12 = 6mm, the thickness ratio of the parabolic segment of the second main spring to β 2 = h 12 / h 2M = 0.55. The number of sheets of the auxiliary spring n=1, half the length L of the auxiliary spring A =525mm, the horizonta...

Embodiment 2

[0055] Embodiment 2: The width of the primary and secondary springs of a few-piece parabolic variable cross-section contact type at the end is b=60mm, the modulus of elasticity E=200GPa, half of the installation distance l 3 =60mm; Among them, the number of main reeds m=2, half the length L of each main spring M =600mm, the thickness h of the straight section at the root of the main spring 2M =12mm, the horizontal distance l from the root of the parabola segment to the end point of the main spring 2M = L M -l 3 =540mm; Thickness h of the straight section at the end of the first main spring 11 = 8mm, the thickness ratio of the parabolic segment of the first main spring to β 1 = h 11 / h 2M =0.67; the thickness h of the straight section at the end of the second main spring 12 =7mm, the thickness ratio of the parabolic segment of the second main spring to β 2 = h 12 / h 2M = 0.58. Number of secondary reeds n=1, half length L of secondary reeds A =540mm, the horizontal d...

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Abstract

The invention relates to a method for designating the thickness of the root of an end contact type few-leaf parabola-type variable-cross-section auxiliary spring, and belongs to the technical field of suspension steel plate springs. According to the method, the thickness of the root straight segment of each auxiliary spring leaf can be designed according to design required values of the structure parameters and elasticity modulus of each main spring leaf of an end contact type few-leaf parabola-type variable-cross-section main and auxiliary spring, the lengths and the number of the auxiliary spring leaves, the thickness ratio of parabolic segments of the auxiliary spring and the complex stiffness of the main and auxiliary spring. It can be known through living examples and simulation verification that the method for designating the thickness of the root of the end contact type few-leaf parabola-type variable-cross-section auxiliary spring is correct, accurate and reliable design values of the thicknesses of the root straight segments of the auxiliary spring can be obtained through the method, and product performance and vehicle smoothness can be improved; meanwhile, the design and experiment expense can be reduced, and the product development speed can be increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for designing the root thickness of an end-contacted few-piece parabolic auxiliary spring with variable cross-section. Background technique [0002] In order to meet the variable stiffness design of the vehicle suspension under different loads and the lightweight requirements of the vehicle suspension, a small number of primary and secondary springs with variable cross-sections are usually used. Due to the complex force of the first main spring of the small variable cross-section main and auxiliary springs, it not only bears vertical loads, but also bears torsional loads and longitudinal loads. Therefore, the end of the first main spring is actually designed to be straight The thickness and length of the section are greater than the thickness and length of the straight section at the end of each main spring, that is, most of them use a small number of variable-section ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50F16F1/18
CPCF16F1/185G06F30/15G06F30/17G06F30/367
Inventor 赵雷雷王炳超周长城于曰伟汪晓安艳王凤娟
Owner 山东恒日悬架弹簧股份有限公司
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