Spherical 5-bar link mechanism, robot arm having spherical 5-bar link mechanism and system having robot arm having spherical 5-bar link mechanism

摘要

A robotic arm with a parallel spherical five-bar linkage having a ground link, two inboard links, and two outboard links. Each inboard link is coupled to the ground link at an axis of rotation and has an intermediate axis spaced apart from the axis of rotation. Each outboard link is pivotally coupled to one of the inboard links at the intermediate axis. The two outboard links are pivotally coupled together at an outboard axis. A constraint limits the rotation of a first one of the outboard links about the intermediate axis of the coupled inboard link such that a maximum angle between the links is substantially less than 180°. A second one of the outboard links and the coupled inboard link are constructed and assembled such that the two intermediate axes are on the same side of a plane including the outboard axis and one of the axes of rotation.