Flexible ball joint suitable for in-orbit application of high-precision mechanism of spacecraft

Abstract

The invention discloses a flexible ball joint suitable for the in-orbit application of a high-precision mechanism of a spacecraft, belonging to the technical field of mechanical structures. The flexible ball joint comprises two spherical bodies, a tensioning rope, tensioning studs and locking nuts, wherein the two spherical bodies are one part of a ball body, round holes and slots are arranged in the spherical bodies, and the tensioning rope penetrates through the round holes. The two spherical bodies are connected with each other through the tensioning rope, the tensioning studs and the locking nuts, and the contact surfaces of the two spherical bodies are spherical surfaces. The movement of the ball joint is restrained through the contact surfaces of the two spherical bodies and the tensioning rope, and the ball joint bears corresponding acting force. The reliable connection of the spherical bodies is ensured through the tensioning rope and the tensioning studs. The tensioning studs are in threaded connection with the corresponding locking nuts. According to the expected drawing force born by the ball joint, the tension of the tensioning rope is determined. The tightening torque of each locking nut is determined according to the magnitude of the tension of the tensioning rope. The contact parts of the two spherical bodies form the ball joint and can realize three-degree of freedom gap-free high-precision movement.

Description

technical field [0001] The invention relates to a flexible ball joint, in particular to a flexible ball joint suitable for on-orbit application of high-precision mechanisms of spacecraft, and belongs to the technical field of mechanical structures. Background technique [0002] The ball joint generally refers to the joint bearing, which is composed of an inner ring and an outer ring. The outer surface of the inner ring and the inner surface of the outer ring are mating spherical surfaces to realize the relative motion of three degrees of freedom between two connected objects. Due to the gap between the inner ring and the outer ring of the spherical plain bearing, it is difficult to meet the needs of high-precision mechanisms. Therefore, it has been proposed to use the elastic deformation of special structural forms to realize the three-degree-of-freedom relative motion between two objects, so as to meet the small and high-precision motion of high-precision mechanisms. Altho...

AI Technical Summary

Problems solved by technology

Although this method solves the motion error caused by the joint bearing clearance, the structure of the joint is complex, and the fatigue requirements of the joint material are high, which greatly increases the difficulty and cost of processing

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