Design method for blanking length of each leaf main spring of non-equal bias frequency type three-stage gradient stiffness leaf spring
A technology of stiffness and bias frequency, which is applied to the design field of the blanking length of the main spring of each piece of the bias frequency type three-stage gradient stiffness leaf spring. The blanking length of the leaf spring cannot meet the requirements of the non-equal bias frequency type three-stage gradient stiffness leaf spring design and CAD software development requirements, etc.
Inactive Publication Date: 2018-09-18
SHANDONG UNIV OF TECH
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Problems solved by technology
However, the deflection analytical calculation of the unequal-bias frequency three-stage gradient stiffness leaf spring is very complicated, and is restricted by key issues such as the calculation of the equivalent thickness of the overlapping parts of the leaf springs at each stage, the design of the initial tangent arc height, and the calculation of the surface shape. Previously, the design method for the blanking length of each piece of the main spring of the non-equal bias frequency three-stage gradient stiffness leaf spring has not been given at home and abroad, which cannot meet the design and CAD software development requirements of the non-equal bias frequency three-stage gradient stiffness leaf spring
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[0061] 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. The total number of pieces of the main spring and secondary springs at all levels is N=5, where the number of main reeds is n=2, and the thickness of each main spring is h 1 = h 2 =8mm; half of the active length of each main spring is L1T =525mm,L 2T =450mm; half of the clamping length is L 1 = L 1 = L 1T -L 0 / 2=500mm; L 2 = L 2T -L 0 / 2=425mm, the difference ΔL between the second main spring and the first half of the main spring 12T = L 1T -L 2T =75mm. 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 A21...
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The invention relates to a design method for the blanking length of each main spring 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 based on the structural parameters of each piece of main spring and secondary springs at all levels, the clamping distance of saddle bolts, elastic modulus, each contact load, rated load, and the design requirements of the remaining tangent arc height of the main spring under rated load , the middle diameter of the lugs at both ends, on the basis of the design of the initial tangent arc height of the main spring and the calculation of the initial surface shape, through the superposition of surface micro-elements, the blanking of each piece of the main spring of the non-equal frequency three-stage gradient stiffness leaf spring Length is designed. It can be seen from the blanking processing test of the prototype that the design method of the blanking length of each main spring of the non-equal-biased three-stage gradient stiffness leaf spring provided by the present invention is correct, and an accurate and reliable design of the blanking length of each main spring is obtained. value. Utilizing the method can increase material utilization rate, improve processing technology and increase production efficiency.
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 non-equal bias frequency type three-stage gradually changing 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 In th...
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IPC IPC(8): F16F1/18G06F17/50
CPCF16F1/185G06F30/17
Inventor 周长城赵雷雷刘灿昌汪晓杨腾飞邵明磊王凤娟
Owner SHANDONG UNIV OF TECH