Design Method of Primary and Secondary Spring Clearance of Non-equal Deviation Frequency One-stage Gradual Stiffness Leaf Spring

Abstract

The invention relates to a design method for a gap between a primary spring and a secondary spring of a non-equal partial frequency first-level gradient stiffness plate spring, and belongs to the technical field of suspension steel plate springs. According to the design method, the gap between the primary spring and the secondary spring of the non-equal partial frequency first-level gradient stiffness plate spring can be designed according to design requirement values of structural parameters of each primary spring and the corresponding secondary spring, an elasticity modulus, primary spring intensifying stiffness, primary and secondary spring composite intensifying stiffness, contact load, rated load, and remaining tangent arc height under the rated load. Model machine loading flexibility experimental results show that the design method for the gap between the primary spring and the secondary spring provided by the invention is correct; a reliable technical foundation is laid for the design of the non-equal partial frequency first-level gradient stiffness plate spring and the development of CAD software. By utilizing the method, an accurate and reliable design value of the gap of the primary spring and the secondary spring can be obtained; the design level, the quality and the performance of a product can be improved; the driving smoothness and the safety of a vehicle can be improved; meanwhile, the design and experimental test cost of the product can be reduced; the development speed of the product is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for the primary and secondary spring gaps of a non-equal bias frequency one-stage gradual stiffness leaf spring. Background technique [0002] In order to meet the strength requirements of the main spring of the first-level gradient stiffness leaf spring, the secondary spring is usually allowed to bear the load as soon as possible to reduce the complete contact load and the main spring stress, that is, the non-equal bias frequency one-level gradient stiffness leaf spring suspension is used. Among them, The gap between the primary and secondary springs of the non-equal frequency one-stage gradual stiffness leaf spring not only affects the primary and secondary spring gap, gradient stiffness, suspension bias frequency and vehicle ride comfort, but also affects the stress of the leaf spring, installation and assembly, and under rated load. Residual tangent arc heig...

AI Technical Summary

Problems solved by technology

However, due to the constraints of the initial tangent arc height of the main and auxiliary springs and the calculation of the surface shape at any position, the design method of the main and auxiliary spring gaps of the non-equal frequency one-stage gradient stiffness leaf spring has not been given before, which cannot meet the The rapid development of the vehicle industry and the requirements of modern CAD software development

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