Matching design method of pre-clamping stress of tertiary gradient rigidity leaf spring equal-thickness main springs

A pre-clamping, leaf spring technology, applied in computing, special data processing applications, instruments, etc., can solve the problems that the suspension three-level gradient stiffness leaf spring cannot be satisfied, and the accurate and reliable three-level gradient stiffness leaf spring has not been given. , to achieve the effect of reducing design and test costs, improving design level and speeding up development speed

Inactive Publication Date: 2018-07-06
SHANDONG UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, according to the information we have found, due to the constraints of the calculation of the equivalent thickness of the main spring and the overlapping parts of the roots of the auxiliary springs of each level and the calculation of the difference in pre-clamping stress between the main springs, there has been no prior research at home and abroad. An accurate and reliable matching design method for the pre-clamping stress of the three-stage gradient stiffness leaf spring with equal thickness of the main spring cannot meet the rapid development of vehicles and the requirements for modern CAD design of the suspension three-stage gradient stiffness leaf spring

Method used

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  • Matching design method of pre-clamping stress of tertiary gradient rigidity leaf spring equal-thickness main springs
  • Matching design method of pre-clamping stress of tertiary gradient rigidity leaf spring equal-thickness main springs
  • Matching design method of pre-clamping stress of tertiary gradient rigidity leaf spring equal-thickness main springs

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Embodiment 1

[0024] Embodiment 1, the width b of a leaf spring with three grades of gradual stiffness = 60mm, the thickness of each main spring is equal, that is, the main spring is superimposed with equal thickness, 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 is h=8mm, and half of the active length of each main spring is L 1T =525mm, L 2T =475mm, L 3T=425mm. The number of sheets of the first secondary spring n 1 =1, the thickness h of the first secondary spring A11 = 10 mm. The number of pieces of the secondary secondary spring n 2 = 1, the thickness h of the secondary secondary spring A21 =12mm; the number of pieces of the third secondary spring n 3 =1, the thickness h of the third auxiliary spring A31 = 13 mm. The first contact load P k1 =1800N, the second contact load P k2 =2600N, the third contact load P k3 =3100N, rated load P N =7500N, the allowable stress ...

Embodiment 2

[0044] Embodiment 2, the width of a leaf spring with three grades of gradual stiffness b=63mm, the thickness of each main spring is equal, that is, the main spring is superimposed with equal thickness, 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 is h=9mm; half of the active length of each main spring is L 1T =525mm,L 2T = 470mm. The number of sheets of the first secondary spring n 1 =1, the thickness h of the first secondary spring A11 = 11 mm. The number of pieces of the secondary secondary spring n 2 = 1, the thickness h of the secondary secondary spring A21 = 12 mm. The number of sheets of the third secondary spring n 3 =1, the thickness h of the third auxiliary spring A31 = 13 mm. The first contact load P k1 =1800N, the second contact load P k2 =2300N, the third contact load P k3 =3000N, rated load P N =7000N, allowable stress of the first main sp...

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Abstract

The invention relates to a matching design method of pre-clamping stress of tertiary gradient rigidity leaf spring equal-thickness main springs, and belongs to the technical field of suspension gradient rigidity leaf springs. According to the number of the main springs, the number of all levels of subsidiary springs, and structural parameters of the main springs and all the levels of subsidiary springs, a contact load, a rated load and the allowable stress of the first main spring under the rate load are set from the first time, the second time and the third time, and the pre-clamping stress of all the equal-thickness main springs of the tertiary gradient rigidity leaf springs are subjected to matching design. As can be known from prototype testing, the matching design method of the pre-clamping stress of the tertiary gradient rigidity leaf spring equal-thickness main springs is correct, and a reliable technological basis is laid for designing the free tangent arc height of all the equal-thickness main springs of the tertiary gradient rigidity leaf spring. By means of the method, it can be ensured that the pre-clamping stress of all the main springs meets design requirements, the design level of a product is increased, and the reliability of the product and vehicle driving safety are improved; meanwhile, the design and testing cost is lowered, and the product developing speed is increased.

Description

technical field [0001] The invention relates to a matching design method for the pre-clamping stress of a thick main spring such as a leaf spring with gradually changing stiffness of a vehicle suspension, especially a three-stage gradually changing stiffness leaf spring. Background technique [0002] In order to meet the design requirements of vehicle ride comfort under different loads, three-stage gradient stiffness leaf springs can be used, that is, between the last leaf of the main spring and the first leaf of the first auxiliary spring, and between the last leaf of the first auxiliary spring and the first leaf of the second auxiliary spring. There are three-stage gradient gaps between the first secondary secondary reeds, and between the second secondary secondary reed end and the third secondary secondary reed first. Among them, the most widely used is the equal-thickness main spring type three-stage gradual change. Stiffness leaf spring, that is, the thickness of each l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17
Inventor 周长城赵雷雷毛少坊于曰伟汪晓杨铖兆李晓晗杨腾飞梁宇通
Owner SHANDONG UNIV OF TECH
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