Cam-driven three-degree-of-freedom parallel manipulator

The invention provides a cam-driven three-degree-of-freedom parallel manipulator. The cam-driven three-degree-of-freedom parallel manipulator comprises a fixed platform, a movable platform, three plane cams, a swing rod, a connecting rod, a large arm, a small arm and the like. A movement is controlled and driven by combining the three cams, a movement is transferred by virtue of three spatial connecting rod mechanisms, and the degree of freedom of the movable platform is limited by mutual constraint of three groups of spatial parallelogram structures, so that the movable platform and the fixed platform are parallel all the way and mobile degrees of freedom in three directions are remained, so that the movable platform moves in different positions in the space. The manipulator provided by the invention has the characteristics of being compact in structure, high in loading capacity, high in production efficiency, high in degree of automation, small in repetitive error, low in cost and high in practicality. 本发明提