Variable-rigidity spherical hinge and variable-rigidity design method

Abstract

The invention discloses a variable-rigidity spherical hinge and a design method. The variable-rigidity spherical hinge comprises a spherical hinge body and an outer sleeve, wherein the outer sleeve sleeves the spherical hinge body; the variable-rigidity spherical hinge and the design method are characterized in that an annular sealing space in the circumferential direction is formed between the spherical hinge body and the outer sleeve, the annular sealing space penetrates into a rubber layer of the spherical hinge body, an annular stopping block is arranged in the annular sealing space, and the annular sealing space is not completely filled with the annular stopping block; and an annular gap which is arranged in the axial direction is formed between the spherical hinge body and the annular stopping block, the minimum radial width of the annular gap is X, and X is larger than 0.5mm and less than 10 mm. According to the variable-rigidity spherical hinge and the design method, the requirements that the required rigidity is small of the spherical hinge under a small load, the required rigidity is obviously increased of the spherical hinge under a large load and the bearing requirements of the time limit can be met; and external dust, soils and even sand particles can be effectively prevented from entering the interior of the spherical hinge, the release space of the rubber is increased, the rubber is effectively prevented from being bent and deformed, the increase of the pre-compression amount of the product is facilitated, the generation of rubber cracks is prevented, and thefatigue life is prolonged.

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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