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Calculation method of each leaf stress of non-end contact type few-leaf parabolic primary and secondary springs

A parabolic, main and auxiliary spring technology, applied in the field of vehicle suspension leaf springs, can solve complex problems

Active Publication Date: 2019-04-16
山东双力板簧有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the straight sections of the ends of each piece of the main spring are not isomorphic, the lengths of the secondary spring and the main spring are not equal, and the calculation of the end force of each piece of the main spring and the secondary spring after the primary and secondary contact is very complicated. Failure to give the stress calculation method of each piece of main spring and auxiliary spring at different positions of the non-end contact few-piece parabolic variable-section main and auxiliary springs

Method used

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  • Calculation method of each leaf stress of non-end contact type few-leaf parabolic primary and secondary springs
  • Calculation method of each leaf stress of non-end contact type few-leaf parabolic primary and secondary springs
  • Calculation method of each leaf stress of non-end contact type few-leaf parabolic primary and secondary springs

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Embodiment

[0056] Example: The width of a non-end contact type few-piece parabolic variable-section primary and secondary springs is b=60mm, the modulus of elasticity E=200GP, half of the installation distance l 3 =55mm; among them, the number of main reeds m=2, half the length L of the main spring M =575mm, the horizontal distance l from the root of the main spring parabolic segment to the main spring end point 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 thickness h of the straight section at the end of the first main spring 11 =7.04mm, the length of the straight section at the end l 11 =212.99mm, the thickness ratio of the parabola segment β 1 =h 11 / h 2M =0.64; the thickness h of the straight section at the end of the second main spring 12 =6.05mm, the length of the straight section at the end l 12 =157.30mm, the thickness ratio of the parabola segment β 2 = 0.55. Number of secondary reeds n=1, half len...

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Abstract

The invention relates to a stress calculating method of each spring of a non-end contact type few-leaf parabola main-auxiliary spring, and belongs to the hang rack steel plate spring technical field; according to structure parameters, elasticity modulus, auxiliary spring useful load and main-auxiliary spring bearing load of each main spring and each auxiliary spring of the non-end contact type few-leaf parabola variable cross-section main-auxiliary spring, the method can calculate the stress of each main spring and each auxiliary spring in a random position; through embodiments and ANSYS emulation proof, the method can obtain accurate and reliable stress calculation values of each main spring and each auxiliary spring in a random position, thus providing accurate calculation method for the stress values of each main spring and each auxiliary spring in a random position of the non-end contact type few-leaf parabola variable cross-section main-auxiliary spring, improving design level, performance and life of the product, improving vehicle driving smoothness, reducing product design and test cost, and accelerating product develop speed.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for calculating the stress of each leaf of a non-end contact type few-piece parabolic primary and secondary spring. Background technique [0002] The force of the first main spring of the few variable cross-section main and auxiliary springs is complex, not only bears vertical loads, but also bears torsional loads and longitudinal loads. Therefore, the end straight section of the first main spring is actually designed The thickness and length are greater than the thickness and length of the straight sections at the ends of the other main springs, that is, most of them use a few leaf springs with non-equal structures at the ends to meet the complex stress requirements of the first main spring. . In addition, in order to meet the design requirements of different composite stiffnesses, auxiliary springs of different lengths are usually used. Therefore, the positions of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/367
Inventor 刘瑞军王炳超周长城汪晓于曰伟赵雷雷王凤娟
Owner 山东双力板簧有限公司
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