Contact load matching design method of non-equal-frequency-offset type three-stage rigidity-gradually-changing laminated spring

Abstract

The invention relates to a contact load matching design method of a non-equal-frequency-offset type three-stage rigidity-gradually-changing laminated spring, and belongs to the technical field of vehicle suspension steel plate springs. According to the contact load matching design method disclosed by the invention, the matching design of each contract load of the non-equal-frequency-offset type three-stage rigidity-gradually-changing laminated spring is performed according to half of the clamping length of the first piece of a main spring, the thickness, the allowable stress, the unloaded load and the rated load of each main spring, and the thickness, the allowable stress, the unloaded load and the rated load of each stage of an auxiliary spring. Through testing a sample machine, the contact load matching design method of the non-equal-frequency-offset type three-stage rigidity-gradually-changing laminated spring provided by the invention is right, so that a reliable technical basis is established for the design of the non-equal-frequency-offset type three-stage rigidity-gradually-changing laminated spring and the CAD software development; reliable design values of each contact load can be obtained through utilizing the contact load matching design method disclosed by the invention, so that not only are the design requirements for gradually-changing offset frequency of a suspension and driving smoothness of vehicles met, but also the design requirements for the stress intensity of the main spring can also be met; and besides, the design expenses and the experimental expenses are reduced, and the developing speed of products is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a contact load matching design method for a non-equal bias frequency type three-stage gradient 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 Leaf spring suspension, in which, ea...

AI Technical Summary

Problems solved by technology

However, due to the constraints of the equivalent thickness of the root overlapping part and the calculation of the maximum stress of the unequal frequency three-stage gradient stiffness leaf spring, the contact load of the unequal frequency three-stage gradient stiffness leaf spring has not been given before at home and abroad. The matching design method 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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