Design method for gradually-changing gaps of double-stage auxiliary spring type non-equal offset-frequency plate spring with gradually-changing stiffness

Abstract

The invention relates to a design method for gradually-changing gaps of a double-stage auxiliary spring type non-equal offset-frequency plate spring with gradually-changing stiffness, and belongs to the technical field of suspension steel plate springs. According to the design method, the two-stage gradually-changing gaps delta MA1 and delta A12 of the double-stage auxiliary spring type non-equal offset-frequency plate spring with the gradually-changing stiffness can be designed according to structural parameters, the elastic modulus, the u-bolt clamping distance, the contact load each time, and the remaining tangential arc height required value under a rated load of each main spring and each auxiliary spring. It can be known, from a result of a prototype loading deflection test, that the design method of the gradually-changing gaps of the two-stage auxiliary spring type non-equal offset-frequency type plate spring with the gradually-changing stiffness is correct, and a reliable technological base is laid for design for the two-stage auxiliary spring type non-equal offset-frequency type plate spring with the gradually-changing stiffness and CAD software development. By adoption of the method, accurate and reliable design values of the two-stage gradually-changing gaps can be obtained, the design level of products is increased, and travelling smoothness and safety of vehicles are improved; and meanwhile, the design and test cost can be further lowered, and product development can be accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for a gradual change gap of a two-stage auxiliary spring type non-equal bias frequency type gradual change stiffness leaf spring. Background technique [0002] In order to improve the design requirements of the ride comfort of the vehicle under the rated load, the auxiliary spring of the original one-stage gradual stiffness leaf spring is split and designed into two-stage auxiliary springs, that is, a two-stage auxiliary spring type gradual stiffness leaf spring is adopted; at the same time, due to Restricted by the strength of the main spring, usually through the initial tangent arc height of the main spring, the initial tangent arc height of the first-level auxiliary spring and the second-level auxiliary spring, the distance between the main spring and the first-level auxiliary spring and the first auxiliary spring and the second The two-stage gradient gap bet...

AI Technical Summary

Problems solved by technology

However, due to the fact that the deflection of the two-stage auxiliary spring type non-equal bias frequency type gradient stiffness leaf spring is very complicated during the gradual change process, and is restricted by the design of the initial tangent arc height, the shape of the leaf spring surface and the calculation of the arc height of the surface at any position, according to According to the research data, the gradual gap design method of the two-stage auxiliary spring type non-equal bias frequency type gradient stiffness leaf spring has not been given before, so it cannot meet the rapid development of the vehicle industry and the modernization of the suspension spring and suspension CAD design and software development requirements

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