Design method for root thickness of end-contactless few-leaf root-enhanced sub-spring

A technology of root thickness and design method, applied in calculation, special data processing applications, instruments, etc., can solve the problems of complex design of main and auxiliary spring thickness, failure to give the design method of auxiliary spring thickness, and inability to meet the requirements of precise design, etc.

Inactive Publication Date: 2016-09-07
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thickness of the straight section at the root of the auxiliary spring determines the composite stiffness of the main and auxiliary springs, which has an important impact on the ride comfort of the vehicle; then, because the straight sections at the ends of each main spring are not isomorphic, the length of the auxiliary spring is shorter than that of the main spring. At the same time, the root is provided with a slash reinforced section. Theref

Method used

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  • Design method for root thickness of end-contactless few-leaf root-enhanced sub-spring
  • Design method for root thickness of end-contactless few-leaf root-enhanced sub-spring
  • Design method for root thickness of end-contactless few-leaf root-enhanced sub-spring

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Embodiment 1

[0033] Example 1: The width of a non-end contact type few-piece root-reinforced variable-section primary and secondary springs is b = 60 mm, half of the installation distance l 3 =55mm, length Δl of oblique line segment=30mm, elastic modulus E=200GPa. The number of main reeds m=2, half the length L of the main reed M =575mm, the distance l from the root of the parabolic segment of the main spring to the end point of the main spring 2Mp = L M -l 3 -Δl=490mm, the distance l from the root of the oblique line section of the main spring to the end point of the main spring 2M = L M -l 3 =520mm; the thickness h of the straight section at the root of each piece of main spring 2M =11mm, the end thickness h of the oblique line section of the main spring 2Mp =10.23mm, the thickness ratio of the oblique line section of the main spring γ M = h 2Mp / h 2M =0.93; Thickness h of the end straight section of the first main spring 11 =7mm, the thickness ratio of the parabolic segment o...

Embodiment 2

[0055] Embodiment 2: The width of a non-end contact type few-piece root-reinforced variable-section primary and secondary springs is b = 60mm, the length of the oblique line segment Δl = 30mm, and half of the installation distance l 3 =60mm, elastic modulus E=200GPa. The number of main reeds m=2, half the length L of the main reed M =600mm, the distance l from the root of the parabolic segment of the main spring to the end point of the main spring 2Mp = L M -l 3 -Δl=510mm, the distance from the root of the oblique line section of the main spring to the end point of the main spring l 2M = L M -l 3 =540mm; the thickness h of the straight section at the root of each main spring 2M =12mm, the end thickness h of the oblique line section of the main spring 2Mp =11mm, the thickness ratio of the oblique line section of the main spring γ M =h 2Mp / h 2M =0.92; Thickness h of the straight section at the end of the first main spring 11 =7mm, the thickness ratio of the parabolic...

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Abstract

The present invention relates to a design method for a root thickness of an end-contactless few-leaf root-enhanced sub-spring, and belongs to the technical field of suspension leaf springs. According to the method, the thickness of a flat straight section of a sub-spring root of end-contactless few-leaf root-enhanced main and sub springs with a variable cross section can be designed according to a structure parameter of each leaf of main spring, a length and a leaf number of a sub-spring, a thickness ratio of an inclined line segment of the sub-spring and a thickness ratio of a parabolic line segment, an elastic modulus, and a main and sub spring composite stiffness design requirement value. It can be known by instances and simulation verification that the design method for the root thickness of the end-contactless few-leaf root-enhanced sub-spring, which is provided by the present invention, is correct, and an accurate and reliable sub-spring root thickness design value can be obtained, and a reliable design method is provided for design of the end-contactless few-leaf root-enhanced main and sub springs, and by using the method, the design level, product quality and performance of the few-leaf main and sub springs with the variable cross section as well as vehicle driving smoothness can be improved. Moreover, design and experiment costs can be lowered, and product development can be sped up.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the thickness of the root of a non-end contact type auxiliary spring with few pieces of root reinforcement. Background technique [0002] Due to the complex stress of the first main spring with variable cross-section, it not only bears vertical load, but also bears torsional load and longitudinal load. Therefore, the thickness of the straight section at the end of the first main spring is actually designed to be thicker than The other main springs are thicker, that is, in the actual design and production, most of them use a few parabolic variable-section main and auxiliary leaf springs with non-equal ends; at the same time, in order to strengthen the few parabolic variable-section main and auxiliary springs If the stress intensity is high, a slanted line section is usually added between the straight section and the parabolic section at the root, that is, the...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/367
Inventor 周长城赵雷雷邵明磊王凤娟汪晓于曰伟袁光明
Owner SHANDONG UNIV OF TECH
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