Method for designing limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness

Abstract

The invention relates to a method for designing limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness, and belongs to the technical field of suspension leaf springs. According to the method, design can be carried out on the maximum limiting deflection of the two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness on the basis of calculation of clamping stiffness, gradually changing stiffness and maximum allowable load according to structure parameters, U-bolt clamping distances, loads of each contact and maximum allowable stresses of each main spring and each auxiliary spring. Prototype loading deflection experiments prove that the method for designing limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness is correct, and a reliable technical method is provided for the design of limiting deflections of two-stage auxiliary spring type non-equal offset frequency type leaf springs with gradually changing stiffness. By utilizing the method, correct and reliable maximum limiting deflection design values can be obtained, the design level, reliability and vehicle running safety of products can be improved, the design and experiment expenses can be reduced, and the product development speed can be improved.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a design method for limiting deflection of a two-stage auxiliary spring type non-equal bias frequency type gradient stiffness leaf spring. Background technique [0002] In order to improve the design requirements of the ride comfort of the vehicle under the rated load, a two-stage secondary spring type gradient stiffness leaf spring can be used. The initial tangent arc height of the spring and the second-stage auxiliary spring, and the two-stage gradual gap allow the auxiliary spring to bear the load in advance, thereby reducing the stress of the main spring, that is, the two-stage auxiliary spring adopts a non-equal frequency type gradient stiffness leaf spring suspension , wherein a limit device is set according to the maximum limit deflection to protect the leaf spring under impact load and prevent the leaf spring from breaking due to impact load, thereby improving the relia...

AI Technical Summary

Problems solved by technology

However, because the deflection of the two-stage main spring type unequal frequency gradient spring is very complex, and is restricted by the key issues of the maximum allowable load and the calculation of the gradient clamping stiffness, according to the information obtained, it has not been possible to give The design method of the limit deflection of the two-stage auxiliary spring type non-equal bias frequency type gradient stiffness leaf spring cannot meet the rapid development of the vehicle industry and the requirements of the modern CAD design and software development of the suspension spring suspension

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