Three-freedom double-layer oil film type spherical hinge

Abstract

The invention relates to a three-dimensional double-layer oil film type spherical hinge, wherein a ball and socket is provided with a oil feeding pressure inlet and an oil-return pressure inlet; a major semi-sphere is arranged in the concave spherical surface of the ball and socket, and a minor semi-sphere is arranged in the major semi-sphere; the end surface of the major semi-sphere is connectedwith a cover board; a mandrel respectively passes through a central circular hole of the ball and socket, the major semi-sphere, and the minor semi-sphere; the ball and socket, the major semi-sphere,and the minor semi-sphere are mounted and connected together; a ball-and-socket oil groove is arranged on the concave spherical surface, and is communicated with the oil feeding pressure inlet through an oil passage, and an oil inlet of the ball-and-socket oil groove is provided with a ball-and-socket throttleer; and the convex spherical surface of the minor semi-sphere is provided with a minor semispherical oil groove which is communicated with a mandrel oil passage arranged in the mandrel, and an oil passage inlet of the minor semispherical oil groove is provided with a minor semispherical throttleer. The spherical hinge has large transmission rigidity in structure, little friction, and long service life, and can obtain a mechanism of five degree of freedom when the spherical hinge is used in matched pair, is applied to multidimensional vibration as a driving source and a connecting piece of a table board, and can improve dynamic response performance of the table board.

Description

technical field [0001] The invention relates to a ball joint type connection mechanism in the field of mechanical transmission, in particular to a low-friction, high-rigidity, no-gap, bearing-bearing shaft that uses the principle of hydrostatic support to form a high-pressure oil film on the surface of a spherical rotating pair. Connection mechanism for tensile and compressive loads. Background technique [0002] One of the core technologies for developing a high-response multi-dimensional shaking table is to provide a device that can realistically transmit the amplitude of the excitation source to the shaking table while connecting the excitation source and the shaking table surface to eliminate overconstraint. The device should also have notable features such as seamless connection, high connection rigidity, and low rotational friction. Its application in the field of multi-dimensional vibration can effectively improve the dynamic response characteristics of the vibration ...

AI Technical Summary

Problems solved by technology

The Chinese patent "Bidirectional Bearing with Five Degrees of Freedom Static Pressure Spherical Bearing" (application number: 200810088894.9) discloses a connection mechanism scheme with double spherical joints and five degrees of freedom. The mandrel is connected, so that the hydraulic support force between the four layers of oil film is coupled through the mandrel, making it difficult to statically debug the oil film of the mechanism

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