Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps

A design method and parabolic technology, applied in the field of vehicle suspension leaf springs, can solve problems such as complex deformation calculations, inability to meet the design requirements of small-piece variable-section leaf springs, and inability to provide analytical design formulas

Active Publication Date: 2016-05-25
慕贝尔汽车部件(太仓)有限公司
View PDF3 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the calculation of the deformation at any position of the non-isomorphic few-piece variable-section leaf spring at any position is very complicated, it has not been possible to give the non-isomorphic few-piece variable-section main spring at the end. Design method of main and auxiliary spring clearance at the contact point of section and auxiliary spring
[0003] Although someone has previously given a design method for a few variable-section leaf springs, for example, Peng Mo and Gao Jun once proposed the design of variable-section leaf springs in "Automotive Engineering", 1992 (Volume 14) No. 3 Calculation method, this method is mainly designed for the small-piece parabolic variable-section leaf spring with the end isomorphic. Design of the gap between the main spring and the auxiliary spring at the contact point between the straight section of the end and the auxiliary spring of the main spring with a small number of variable cross-sections
At present, although some people have used the ANSYS modeling and simulation method for the gap between the main and auxiliary springs with small variable cross-sections, this method can only simulate and verify the gap between the main and secondary springs with small variable cross-sections given the actual design structure, and cannot provide Accurate analytical design formula to meet the requirements of analytical design, not to mention the rapid development of vehicles and the development of modern CAD design software for suspension leaf springs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps
  • Design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps
  • Design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: The sheet number N=2 of a few sheet parabolic variable-section main springs, wherein, the half length L=575mm of each sheet main spring, the width b=60mm, the modulus of elasticity E=200GPa, the straight section of the root Thickness h 2 =11mm, half of the installation distance l 3 =55mm, the distance from the root of the parabola segment to the end point of the spring l 2 =L-l 3 =520mm; Thickness h of the straight section at the end of the first main spring 11 =7mm, that is, the thickness ratio β of the parabolic segment of the first main spring 1 =0.64; the thickness h of the straight section at the end of the second main spring 12 =6mm, that is, the thickness ratio β of the parabolic segment of the second main spring2 =0.55; half length L of secondary spring A =455mm, that is, the horizontal distance l from the end point of the auxiliary spring to the end point of the main spring 0 =L-L A = 120mm, the auxiliary spring is in contact with a certain...

Embodiment 2

[0053] Embodiment two: the sheet number N=2 of a few sheet parabolic variable section main spring, wherein, the half length L=600mm of each sheet main spring, width b=60mm, modulus of elasticity E=200GPa, root thickness h 2 =14mm, half of the installation distance l 3 = 60mm, the distance from the root of the parabola end to the end point of the spring l 2 =L-l 3 =540mm; Thickness h of the straight section at the end of the first main spring 11 =9mm, that is, the thickness ratio β of the parabolic segment of the first main spring 1 =0.64, the thickness h of the straight section at the end of the second main spring 12 = 8mm, that is, the thickness ratio β of the parabolic segment of the second main spring 2 =0.57; half of the length of the auxiliary spring L A =490mm, that is, the horizontal distance l from the end point of the auxiliary spring to the end point of the main spring 0 =L-L A = 110 mm. Half of the active load of the auxiliary spring required by the design i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Half lengthaaaaaaaaaa
Widthaaaaaaaaaa
Elastic modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps, and belongs to the technical field of suspension steel plate springs. The method comprises the steps that according to the structural size and elastic modulus of each parabolic type variable cross-section main spring, an end point deformation coefficient of each main spring and a deformation coefficient Gx-CD of the Nth main spring on the contact point of an auxiliary spring and the end straight section; then, according to the auxiliary spring acting load design requirement value and the end point deformation coefficient of each main spring, the endpoint force FN of the Nth main spring is obtained; then, according to the thickness h2 of the straight section at the root of the Nth main spring, the FN and the Gx-CD, the main and auxiliary gaps between the contact points of the auxiliary springs and the end straight sections of the main springs are designed. According to simulation verification, the accurate and reliable main and auxiliary spring gap design values can be obtained by means of the method, the auxiliary spring acting load design requirement is met, and the product design level and performance and the vehicle ride comfort are improved; meanwhile, the product development speed is increased, and the design and testing expenses are lowered.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the gap between the end of a main spring with a small parabola variable cross-section and an auxiliary spring. Background technique [0002] In order to meet the variable stiffness design requirements of the vehicle suspension under different loads, a small number of variable cross-section leaf springs are 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 After a certain load is exceeded, the main and auxiliary springs are in contact and work together. 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 longitudinal loads. Therefore, the end thickness of the first leaf spring actually designed is usually thicker than...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 周长城王炳超于曰伟王凤娟邵明磊汪晓张云山
Owner 慕贝尔汽车部件(太仓)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com