Design method for cutting lengths of various main springs of high-strength first-level gradual-change-rigidity leaf spring

A high-strength and stiffness technology, applied in the field of vehicle suspension leaf springs, can solve the calculation of gradient clamping stiffness and surface shape is very complex, does not give high-strength first-grade gradient stiffness leaf springs, affects material utilization and economic benefits and other problems to achieve the effect of reducing design and test costs, saving materials, and improving processing technology

CN106763383AInactive Publication Date: 2017-05-31SHANDONG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-05-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a design method for cutting lengths of various main springs of a high-strength first-level gradual-change-rigidity leaf spring and belongs to the technical field of suspension steel plate springs. According to the method, according to design requirement values of structural parameters of main springs and auxiliary springs of the high-strength first-level gradual-change-rigidity leaf spring, the elastic modulus, a rated load and the remaining tangent line arc height under the rated load, on the basis of main spring initial tangent line arc height design and first-piece main spring curved surface shape calculation, the cutting lengths of the various main springs are accurately designed on the basis of the superposition principle by dividing a first-piece main spring curved surface into a plurality of micro-curved-surface units. It can be seen that from a model machine loading test, the design method for the cutting lengths of the various main springs of the high-strength first-level gradual-change-rigidity leaf spring is right. Accurate design values of the cutting lengths of the various main springs can be obtained, materials are saved, the economic benefits are improved, the production efficiency can also be improved, the design and experiment cost is reduced, and the product development speed is increased.
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Description

technical field

[0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the blanking length of each main spring of a high-strength one-stage gradually changing stiffness 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, high-strength level one The surface under the given initial tangent arc height of the gradient stiffness leaf spring is neither a circular surface nor an oblique surface, nor a parabolic surface, but a cubic surface. Therefore, according to the span size of each main spring, the main The blanking length of the spring is designed, and it is difficult to obtain the accurate design value of the blanking length by using the traditional design method, which not only affect...

Examples

Embodiment

[0037] 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. The number of main reeds n=2 pieces, the thickness h of each main spring 1 = h 2 =8mm, half of the active length of each main spring is L 1t =525mm and L 2t =450mm, difference ΔL between the half length of the second main spring and the first main spring 12t = L 1t -L 2t =75mm; half of the clamping length of each main spring is L 1 = L 1t -L 0 / 2=500mm, L 2 = L 2t -L 0 / 2=425mm. The middle diameter d of the lugs at both ends of the first main spring e = 60mm. The number of auxiliary reeds m = 3 pieces, the thickness h of each auxiliary reed A1 = h A2 = h A3 =13mm, half of the active length is L A1t =350mm,L A2t =250mm,L A3t =150mm, half of the clamping length is L A1 = L A1t -L 0 / 2=325mm, L A2 = L A2t -L 0 / 2=225mm, L A3 = L A3t -L 0 / 2=125mm. The total number of she...