The Design Method of the Maximum Limiting Deflection of Non-equal Deviation Frequency Type Three-Stage Gradual Stiffness Leaf Spring
A technology of maximum limit and stiffness, applied in the field of bias-frequency three-stage gradient stiffness leaf springs, which can solve the complex deflection calculation and cannot meet the CAD software development requirements for the design of non-uniform bias-frequency three-stage gradient stiffness leaf springs, not given. Problems such as maximum limit deflection of non-equi-biased three-stage gradient stiffness leaf springs
Inactive Publication Date: 2019-02-19
SHANDONG UNIV OF TECH
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Problems solved by technology
However, because the deflection calculation of the non-equal frequency three-stage gradient stiffness leaf spring is very complicated, and is restricted by the gradual compound clamping stiffness and the calculation of the maximum allowable load, the non-equal deviation frequency three-stage spring has not been given before at home and abroad. The design method of the maximum limit deflection of the gradient stiffness leaf spring cannot meet the design and CAD software development requirements of the non-equal bias frequency type three-stage gradient stiffness leaf spring
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Embodiment
[0050] Embodiment: The width b of a non-equal-bias type three-stage gradient stiffness leaf spring is b=63mm, half of the clamping distance L of the saddle bolt 0 =50mm, elastic modulus E=200GPa, maximum allowable stress [σ]=800MPa. The total number of pieces of the main and auxiliary springs N = 5, where the number of main reeds n = 2, the thickness of each piece of the main spring h 1 = h 2 =8mm; half of the active length of each leaf of the main spring is L 1T =525mm,L 2T =450mm, half of the clamping length is L 1 =L 1T -L 0 / 2=500mm, L 2 =L 2T -L 0 / 2=425mm. The number of sheets of the first secondary spring n 1 = 1, thickness h A11 =8mm, half of the active length is L A11T =350mm, half of the clamping length is L A11 =L 3 =L A11T -L 0 / 2=325mm. The number of pieces of the secondary secondary spring n 2 =1, thickness h A21 =13mm, half of the active length is L A21T =250mm, half of the clamping length is L A21 =L 4 =L A11T -L 0 / 2=225mm. The number ...
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The invention relates to a design method for the maximum limit deflection of a non-equal bias frequency type three-stage gradually changing stiffness leaf spring, belonging to the technical field of vehicle suspension leaf springs. The present invention can be determined according to the structural parameters of each leaf spring, the clamping distance of the riding bolt, the elastic modulus, the contact load of each contact load, the maximum allowable stress, the maximum allowable load, the clamping stiffness of each level, and the gradient composite clip Based on the calculation of the tight stiffness, the maximum limit deflection of the unequal frequency three-stage gradient stiffness leaf spring is designed. It can be seen from the prototype test that the design method of the maximum limit deflection of the non-equal bias frequency type three-stage gradient stiffness leaf spring provided by the present invention is correct. This method can be used to obtain accurate and reliable maximum limit deflection design value, ensure that the limit device can protect the leaf spring under impact load, improve product design level, quality, reliability, service life and vehicle driving safety; at the same time, Reduce design and test costs and speed up product development.
Description
technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the maximum limit deflection of a non-equal bias frequency type three-stage gradient stiffness leaf spring. Background technique [0002] In order to meet the ride comfort of the vehicle under different loads, the main spring and auxiliary spring of the original one-stage gradient stiffness leaf spring can be split into two stages respectively, that is, a three-stage gradient stiffness leaf spring is used; at the same time, in order to ensure the stability of the main spring Stress intensity, usually through the initial tangent arc height of the main spring and the third-level auxiliary spring and the three-level gradual change gap, so that the third-level auxiliary spring can properly bear the load in advance, thereby reducing the stress of the main spring, that is, the non-equal frequency type three-level gradual change stiffness leaf spring suspension. I...
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IPC IPC(8): F16F3/02F16F1/18F16F1/26G06F17/50
CPCF16F1/185F16F1/26F16F3/023F16F2230/00F16F2230/0023F16F2238/022G06F30/17G06F30/20
Inventor 周长城于曰伟赵雷雷汪晓杨腾飞毛少坊邵明磊
Owner SHANDONG UNIV OF TECH