Calculation Method of Main Spring Deflection of Two-Stage Secondary Spring Type Non-equal Deviation Frequency Gradual Stiffness Leaf Spring

Abstract

The invention relates to a calculation method for the deflection of a main spring of a two-stage auxiliary spring type non-equal bias frequency type gradually changing stiffness leaf spring, belonging to the technical field of suspension leaf springs. According to the structural parameters, elastic modulus, saddle bolt clamping distance, rated load and each contact load of each leaf spring and auxiliary spring, the present invention can adjust the two-stage auxiliary spring type non-equal deviation frequency type gradient stiffness leaf spring in different The main spring deflection under load is calculated. It can be seen from the test results of the loading deflection of the prototype that the calculation method of the main spring deflection of the two-stage auxiliary spring type non-equal deviation frequency type gradient stiffness leaf spring provided by the present invention is correct, and it is a two-stage auxiliary spring type non-equal deviation frequency type gradual change stiffness The design of the leaf spring and the development of CAD software have laid a reliable technical foundation. This method can be used to obtain accurate and reliable calculated values ​​of the main spring deflection under different loads, improve the design level, quality and performance of the product, and the ride comfort and safety of the vehicle; at the same time, it can also reduce the design and test costs and speed up the production process. development speed.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for calculating the deflection of a main spring 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 , where the deflection of the main spring under different loads affects the gradient stiffness of the leaf spring, the static and dynamic deflection and bias frequency of the suspension, the ...

AI Technical Summary

Problems solved by technology

However, the calculation of the deflection of the main spring during the gradual change process is very complicated due to the two-stage secondary spring type non-equal bias frequency type gradient stiffness leaf spring, which is not only related to the structural parameters of the main spring and secondary spring, the clamping stiffness of the main spring, and the It is related to the composite clamping stiffness of secondary springs at all levels, and is also related to the contact load

According to the researched data, it can be seen that the calculation method of the main spring deflection of the two-stage auxiliary spring type non-equal deviation frequency type gradient stiffness leaf spring has not been given before, and most of them use the prototype test method to determine the main spring deflection. Therefore, It cannot meet the requirements of the rapid development of the vehicle industry and the modern CAD design and software development of suspension springs and suspensions

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