Determination method for clamping end point force of end non-iso-structured small-blade variable-section plate springs

A non-isostructural, variable-section technology, applied in the direction of leaf springs, springs/shock absorbers, instruments, etc., can solve the problem that the clamping end point force of the non-equal-structured few-piece variable-section leaf spring at the end has not been given accurately and reliably, and cannot Satisfies the problems of suspension with few pieces of variable cross-section leaf springs, and achieves the effects of reducing design and test costs, improving design level, and speeding up development speed

Inactive Publication Date: 2018-06-29
SHANDONG UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, according to the research data, due to the constraints of the matching design of the pre-clamping stress between the leaf springs, no accurate and reliable determination of the clamping end force of the non-equal structure of the leaf springs with small and variable cross-sections has been given before. This method cannot meet the rapid development of vehicles and the requirements for the modern CAD design of suspension leaf springs with few pieces and variable cross-sections

Method used

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  • Determination method for clamping end point force of end non-iso-structured small-blade variable-section plate springs
  • Determination method for clamping end point force of end non-iso-structured small-blade variable-section plate springs
  • Determination method for clamping end point force of end non-iso-structured small-blade variable-section plate springs

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Embodiment 1

[0031] Example 1: The width of a few-piece parabolic variable section leaf spring with unequal structure at a certain end b=60mm, half of the span L T =570mm, half the length of the straight section of the root L 0 =50mm, elastic modulus E=200GPa. The number of leaf springs n=3, the thickness of the root straight section of each leaf spring is h 2 =18mm, the thickness of the flat end of each leaf spring h 11 = 9mm, h 12 =h 13 =8mm, the thickness ratio of the parabolic segment β 1 =h 11 / h 2 =0.5, β 2 = Β 3 =h 12 / h 2 =h 13 / h 2 = 0.444. Quota load P N =16000N, the allowable stress of the first leaf spring under the rated load [σ 1 ]=400MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the rated load and the allowable stress of the first leaf spring under the rated load, for each leaf of the parabolic variable section leaf spring of this configuration The clamping end force of the leaf spring is determined.

[0032] ...

Embodiment 2

[0061] Example 2: The width of a parabolic variable cross-section leaf spring with a few pieces of unequal structure at an end is b=60mm, half the span L T =570mm, half the length of the straight section of the root L 0 =50mm, elastic modulus E=200Gpa. The number of leaf springs n=4, the thickness of the root flat section of each leaf spring is h 2 =16mm; the thickness of the flat end of each leaf spring h 11 = 8mm, h 12 =h 13 =h 14 =7mm, the thickness ratio β of the parabolic segment of each leaf spring 1 =h 11 / h 2 =0.5, β 2 = Β 3 = Β 4 =h 12 / h 2 = 0.4375. Quota load P N =16800N, the allowable stress of the first leaf spring under the rated load [σ 1 ]=400MPa. According to the number of leaf springs, the structural parameters of each leaf spring, the elastic modulus, the rated load and the allowable stress of the first leaf spring under the rated load, for each leaf of the parabolic variable section leaf spring of this configuration The clamping end force of the leaf spring ...

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Abstract

The invention discloses a determination method for clamping end point force of end non-iso-structured small-blade variable-section plate springs, and belongs to the technical field of suspension small-blade variable-section plate springs. The method can determine the clamping end point force of each plate spring of the end non-iso-structured small-blade variable-section plate springs according tothe number of the plate springs, structural parameters of each plate spring, elastic modules, rated load and allowable stress of the first plate spring under the rated load. Through prototype testing,the determination method for the clamping end point force of the end non-iso-structured small-blade variable-section plate springs is correct; accurate and reliable clamping end point force values ofeach plate spring can be obtained; and reliable technological base is laid for free tangent line arc height design of each plate spring. The method can improve the product design level, reliability and service life and the vehicle driving safety, meanwhile, reduces the product design and testing costs, and accelerates the product development speed.

Description

Technical field [0001] The invention relates to a method for determining the clamping end force of a small-piece variable-section leaf spring of a vehicle suspension, in particular, a small-piece variable-section leaf spring with an end unequal structure. Background technique [0002] With the implementation of automobile energy-saving and lightweight policies, small-piece variable-section leaf springs are increasingly popular with vehicle suspensions due to their light weight, high material utilization, no friction or low friction between the plates, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers pay great attention to it, and it has been widely used in vehicle suspension systems. In order to meet the requirements of complex forces at the end of the first leaf spring, usually the thickness and length of the end straight section of the first leaf spring are greater than the thickness and length of the end straight sections of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F1/18G06F17/50
CPCF16F1/18G06F30/17G06F2119/06
Inventor 周长城王凤娟赵雷雷汪晓杨腾飞杨铖兆张云山朱召辉石莹
Owner SHANDONG UNIV OF TECH
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