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Method for calculating stress of each leaf of end part contact type few-leaf diagonal main and assistant springs

A calculation method and technology of primary and secondary springs, applied to leaf springs, calculations, springs, etc., can solve problems that are not given, stress analysis and calculation are complicated, etc.

Inactive Publication Date: 2016-09-28
王炳超
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Problems solved by technology

Because the straight section at the end of the main spring is not isostructural, and when the load is greater than the working load of the auxiliary spring, the deformation and internal force of the main spring and the auxiliary spring are coupled. Therefore, each piece of the main spring and the auxiliary spring The end point force of the spring and the stress analysis and calculation at different positions are very complicated. At present, there has not been an accurate end-contact small-piece slash-line type variable-section main and auxiliary springs. The main springs and auxiliary springs are in different positions. Stress Calculation Method at

Method used

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  • Method for calculating stress of each leaf of end part contact type few-leaf diagonal main and assistant springs
  • Method for calculating stress of each leaf of end part contact type few-leaf diagonal main and assistant springs
  • Method for calculating stress of each leaf of end part contact type few-leaf diagonal main and assistant springs

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Embodiment

[0057] Embodiment: The number of main reeds m=2 of a certain end-contact type few-piece slanted-line variable-section leaf spring, wherein, half the length L of each main spring M =575mm, width b=60mm, elastic modulus E=200GPa, half of the installation distance l 3 =55mm, the distance l from the root of the oblique line to the end 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 thickness h of the end straight section of the first main spring 11 =7mm, that is, the thickness ratio β of the oblique line section 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 oblique line section of the second main spring 2 =0.55; the number of sheets of the secondary spring n=1, half the length L of the secondary spring A =525mm, the distance l from the root of the oblique line to the end of the...

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Abstract

The invention relates to a method for calculating a stress of each leaf of end part contact type few-leaf diagonal main and assistant springs, and belongs to the technical field of suspension steel plate springs. According to the method, stresses of each leaf of the main spring and the assistant spring in different positions can be calculated according to structural parameters of each leaf of the main spring and the assistant spring, an elastic model, an effect-taking load of the assistant spring and loads on the main and assistant springs in the end part contact type few-leaf diagonal variable-cross-section main and assistant springs. Through instances and simulation verification, the method for calculating the stress of each leaf of the end part contact type few-leaf diagonal variable-cross-section main and assistant springs is correct; obtained calculation values of the stresses in different positions are accurate and reliable; a technical basis is laid for stress intensity checking; the design level, product quality and vehicle driving smoothness of the end part contact type few-leaf diagonal variable-cross-section main and assistant steel plate springs can be improved and the service life of the end part contact type few-leaf diagonal variable-cross-section main and assistant steel plate springs can be prolonged; and meanwhile, the design and test expenses can be reduced and the product development speed can be increased.

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 an end-contact type few-leaf slash-line primary and secondary spring. Background technique [0002] For leaf springs with variable cross-sections, in order to meet the requirements of variable stiffness, it is usually designed as the main and auxiliary springs, and through the gap between the main and auxiliary springs, it is ensured that the main and auxiliary springs contact and work together after a certain load is greater than that to meet the vehicle suspension. Design requirements for leaf spring stiffness of frame 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 the vertical load, but also bears the torsional load and the longitudinal load. Therefore, the thickness of the straight section at the end of the first main s...

Claims

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Application Information

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IPC IPC(8): G06F17/50F16F1/18
CPCF16F1/185G06F30/17G06F30/23
Inventor 王炳超周长城
Owner 王炳超
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