Variable Stiffness Spherical Joint and Its Variable Stiffness Design Method

Abstract

The variable stiffness ball joint and its design method include a ball joint body and an outer jacket fitted on the ball hinge body, and are characterized in that there is an annular sealing space along the circumference between the ball hinge body and the outer jacket. The above-mentioned annular sealing space goes deep into the rubber layer of the ball joint body, and an annular stopper is set in the annular sealing space. The annular gap, the minimum radial width of the annular gap is X, 0.5mm<X<10mm. The invention satisfies the requirement that the required rigidity of the ball joint is small when the load is small, and the required rigidity increases significantly when the load is large, and the load-bearing requirements can be limited in time, and can effectively prevent external dust, soil or even sand particles from entering the ball joint, increasing the load. It increases the release space of the rubber, effectively avoids the "bending" deformation of the rubber, is conducive to the increase of the pre-compression of the product, prevents the occurrence of rubber cracks, and improves the fatigue life.

Description

technical field [0001] The invention relates to a variable stiffness spherical hinge and a variable stiffness design method thereof, belonging to the field of spherical hinge design. Background technique [0002] During the loading and running process of the ball joint products, according to the different installation positions and design functions, they can realize the functions of vibration reduction, traction and flexible connection. In order to ensure the comfort of vehicle operation, the stiffness of spherical joint products is required to be small at small loads (normal operation); in order to ensure the reliability of vehicle operation, the stiffness of products is required to be significantly increased at large loads (starting and braking). Timely limit, which requires the spherical joint product to have a certain degree of variable stiffness. [0003] Since the rubber is easy to tear under the action of tensile load, the radial deformation of the ball joint must be...

AI Technical Summary

Problems solved by technology

[0009] The existing patents mentioned above meet the bearing requirements of ball joint products with low stiffness under small loads (normal operation), obvious increase in stiffness under heavy loads (starting and braking), and the ability to limit the position in time. Fatigue life and reliability needs to be improved

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