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Calculation method of active load of auxiliary spring of non-end contact double reinforced primary and auxiliary spring with few pieces

A reinforced, non-end technology, which is applied in calculation, special data processing applications, instruments, etc., can solve the complex calculation of deformation and cannot meet the non-end contact double-reinforced small-piece variable-section primary and secondary springs. The requirements of the applied load checking calculation, the inability to meet the design requirements of the leaf spring with a small number of variable cross-sections, etc.

Active Publication Date: 2019-02-19
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acting load of the auxiliary spring is determined by the structural parameters of each piece of the main spring, the material characteristic parameters, the length of the auxiliary spring, and the gap between the main and auxiliary springs, and affects the ride comfort of the vehicle. Then, due to the strengthening of the end and root It is very complicated to calculate the deformation of the small-piece variable-section leaf spring at any position. Previously, it has not been possible to provide a checking method for the active load of the non-end contact double-reinforced small-piece variable-section main and secondary springs.
[0003] Although some people have previously given the design and calculation method of a few inclined-line variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed the variable-section The design and calculation method of the leaf spring, this method is mainly for the design of the leaf spring with a small number of parabolic cross-sections with the same structure at the end. , and it cannot meet the requirements of checking the load of the auxiliary spring of the non-end contact double-reinforced main and auxiliary springs with small pieces and variable cross-sections

Method used

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  • Calculation method of active load of auxiliary spring of non-end contact double reinforced primary and auxiliary spring with few pieces
  • Calculation method of active load of auxiliary spring of non-end contact double reinforced primary and auxiliary spring with few pieces
  • Calculation method of active load of auxiliary spring of non-end contact double reinforced primary and auxiliary spring with few pieces

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: The number of main reeds of a reinforced few-piece variable-section leaf spring is N=2, wherein, half of the length of each main spring is L=575mm, width b=60mm, elastic modulus E=200GPa, and the root is straight segment thickness h 2 =11.43mm, half of the installation distance l 3 =55mm; the length Δl of the oblique line section at the root of each main spring 2 = 30mm, length Δl of oblique section at the end 1 =30mm; the distance l from the root of the oblique line section at the root to the end point of the main spring 2 =L-l 3 =520mm, the distance l from the root of the parabola segment to the end point of the main spring 2p =L-l 3 -Δl 2 =490mm; root thickness h of parabola segment 2p =10.28mm, the thickness ratio of the oblique section at the root γ=h 2p / h 2 =0.90; The end thickness h of the parabolic segment of the first main spring 11p =5.65mm, the thickness ratio of the parabolic segment of the first main spring to β 1 = h 11p / h 2p =...

Embodiment 2

[0047] Embodiment 2: The number of sheets N=2 of double-reinforced variable-section main springs at certain ends and roots, wherein, half of the length L=600mm of each sheet main spring, width b=60mm, elastic modulus E=200GPa, and the root is flat Straight section thickness h 2 =14.79mm, half of the installation distance l 3 =60mm, the length Δl of the oblique line section at the root of each main spring 2 =30mm, the length of oblique line at the end Δl 1 =30mm; the distance l from the root of the oblique line section at the root to the end point of the main spring 2 =L-l 3 =540mm, the distance from the root of the parabola segment to the end point of the main spring l 2p =L-l 3 -Δl 2 =510mm; root thickness h of parabola segment 2p =13.3mm, the thickness ratio of the oblique section at the root γ=h 2p / h 2 =0.90; The end thickness h of the parabolic segment of the first main spring11p =7.3mm, the thickness ratio β of the parabolic segment of the first main spring 1 =...

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Abstract

The invention relates to a checking calculation method of the auxiliary spring working load of non-end-part contact-type double-strengthened few-piece main and auxiliary springs, and belongs to the technical field of the suspension steel plate spring. Firstly, the end point deformation coefficient G<x-Fi> and the half rigidity K of each piece of main spring as well as the deformation coefficient G<x-CD> of the Nth piece of main spring on the contact point of a parabolic segment and the auxiliary spring can be determined according to the structure size and the elasticity modulus of each piece of an end-part and root-part double-strengthened main spring with a variable cross section; and subsequently, according to the half rigidity K of each piece of main spring, the deformation coefficient G<x-CD> and the thickness h2 of the root part straight section of the Nth piece of main spring and a main and auxiliary spring interval design value [Delta], carrying out checking calculation on the auxiliary spring working load. Through simulation verification, by use of the method, the accurate and reliable checking calculation value of the auxiliary spring working load of the non-end-part contact-type double-strengthened few-piece main and auxiliary springs with the variable cross sections can be obtained so as to improve product design levels and vehicle smoothness. Meanwhile, design and experiment cost is lowered, and a product development speed is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking and calculating the active load of an auxiliary spring of a double-reinforced main and auxiliary spring with non-end contact. Background technique [0002] For a few leaf springs with variable cross-section, in order to meet the requirements of variable stiffness, it is usually designed as the main spring and the auxiliary spring. Among them, the main spring is designed with a certain gap at the contact point with the auxiliary spring to ensure that after a load greater than a certain , the main spring and the auxiliary spring are in contact and work together to meet the design requirements of the vehicle suspension for the stiffness of the leaf spring under different load conditions. Since the first piece of the main spring with variable cross-section is subjected to complex forces, it not only bears vertical loads, but also bears torsional loads and long...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 李国栋刘兆金吴金贤周长城王炳超于曰伟赵雷雷许祥利邵明磊王凤娟
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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