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Design Method of Maximum Limiting Deflection of High-Strength Level-1 Gradual Stiffness Leaf Spring

A design method and high-strength technology, which are applied to spring assemblies, leaf springs, springs, etc. composed of several springs, can solve the problem of not giving the design method of high-strength first-grade gradient stiffness leaf spring, high-strength first-grade gradient stiffness The calculation of the deflection of leaf spring is complicated, which can speed up product development, reduce design and testing costs, and increase service life.

Inactive Publication Date: 2019-03-29
SHANDONG UNIV OF TECH
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Problems solved by technology

However, due to the calculation of the deflection of the high-strength one-stage gradient stiffness leaf spring during the gradual contact process of the main and auxiliary springs is very complicated, according to the research data, the maximum limit of the high-strength one-stage gradient stiffness leaf spring has not been given before at home and abroad. Design method for deflection

Method used

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  • Design Method of Maximum Limiting Deflection of High-Strength Level-1 Gradual Stiffness Leaf Spring
  • Design Method of Maximum Limiting Deflection of High-Strength Level-1 Gradual Stiffness Leaf Spring
  • Design Method of Maximum Limiting Deflection of High-Strength Level-1 Gradual Stiffness Leaf Spring

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Embodiment

[0039] Embodiment: the width b=63mm of a certain high-strength one-level gradual stiffness leaf spring, half L of the saddle bolt clamping distance 0 =50mm, elastic modulus E=200GPa, maximum allowable stress [σ]=1200MPa. The number of main reeds n=2 pieces, half the clamping length L of the first main spring 1 =500mm, the thickness h of each main spring 1 = h 2 =8mm, main spring clamping stiffness K M = 51.44 N / mm. The number of auxiliary reeds m = 3 pieces, the thickness of each auxiliary reed h A1 = h A2 = h A3 = 11 mm. Composite clamping stiffness of primary and secondary springs K MA =178.62 N / mm. Start contact load P k =1842N, full contact load P w =6398N, rated load P N =7227N. According to the clamping stiffness of the main spring, the composite clamping stiffness of the main and auxiliary springs, the thickness and number of pieces of the main spring, the thickness and number of pieces of the auxiliary spring, the modulus of elasticity, and the Half the c...

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Abstract

The invention relates to a design method for the maximum limit deflection of a high-strength one-stage gradually changing stiffness leaf spring, and belongs to the technical field of suspension leaf springs. The present invention can start contact load, complete contact load and maximum The allowable stress is used to design the maximum limit deflection of the high-strength one-stage gradient stiffness leaf spring. Through the loading and deformation test of the prototype, it can be known that the design method of the maximum limit deflection of the high-strength one-level gradually changing stiffness plate spring provided by the present invention is correct, and an accurate and reliable design value of the maximum limit deflection can be obtained, which is a high-strength one-level gradually changing stiffness plate Spring design and CAD software development have laid a reliable technical foundation. Using the method can improve the product design level, quality and performance, improve the service life of the leaf spring and the driving safety of the vehicle; at the same time, reduce the product design and test costs, and accelerate the product development speed.

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 high-strength one-stage gradually changing rigidity leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength one-level gradient stiffness leaf springs can be used to meet the design requirements of vehicle ride comfort and suspension gradient bias frequency under different loads. Among them, according to the maximum limit The limit device set by the deflection design value can protect the leaf spring under the impact load, prevent the leaf spring from breaking due to impact, and enhance the service life of the leaf spring. Among them, the maximum limit deflection design value is changed from the maximum allowable Maximum allowable load under stress P maxX It is determined by the corresponding maximum main spring deflection. However, due to the calculation of the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F3/02F16F1/18F16F1/26G06F17/50
CPCF16F1/185F16F1/26F16F3/023F16F2238/022G06F30/17
Inventor 周长城赵雷雷王炳超汪晓陈海真邵明磊王凤娟
Owner SHANDONG UNIV OF TECH
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