Three-degree-of-freedom hooke hinge

Abstract

The invention provides a hooke hinge for a six-degree-of-freedom parallel motion platform. The hooke hinge has three degrees of freedom, namely a degree of freedom of rotation around an X axis, a degree of freedom of rotation around a Y axis, and a degree of freedom of rotation around a Z axis. Each degree of freedom of rotation is mainly composed of four parts, namely a hinge support, a pin shaft, a bearing and a bearing cap; the structure of the degree of freedom of rotation around the X axis comprises a base, a left support, a right support, a central pin shaft, the bearing and the bearing cap; the structure of the degree of freedom of rotation around the Y axis comprises a base, a left support, a right support, two combined pin shafts, the bearing and the bearing cap; the structure of the degree of freedom of rotation around the Z axis comprises the base shared with the degree of freedom of rotation around the X axis, and the pin shaft, the bearing and the bearing cap.

Description

technical field [0001] The invention relates to a hinge element in a parallel motion platform, in particular to a three-degree-of-freedom Hooke hinge. Background technique [0002] The six-degree-of-freedom (6-DOF) parallel motion platform is a parallel motion mechanism that was first used in flight simulators. It is composed of six driving rods connecting the upper and lower platforms through hinges. The six driving rods can be independent ground motion, known as the Stewart platform. This platform has the advantages of large bearing capacity, high rigidity, high precision, and stable structure, and has been widely used in many fields. [0003] The hinge is the key component of the six-degree-of-freedom parallel motion platform. At present, the hinge forms of the parallel motion platform are mostly articulated pairs such as 6-SPS, 6-UPS or 6-SPU. The SPS type refers to the connection form of the hinge as a spherical joint (Spherical joint). The UPS and SPU types refer to ...

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, spherical hinges are expensive and difficult to process. In fact, they are difficult to obtain. Hooke hinges are called the key substitutes for spherical hinges.

However, the traditional Hooke hinge has only two rotational degrees of freedom, which cannot meet the requirements of the platform's degree of freedom. Therefore, this application discloses a three-degree-of-freedom Hooke hinge to solve the problems of parallel platform hinge accuracy and price.

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