Roll-pitch-roll-yaw surgical tool

摘要

A robotic surgical tool includes an elongate shaft having a working end and a shaft axis. A wrist member has a proximal portion pivotally connected to the working end to rotate relative to the working end around a pitch axis which is nonparallel to the shaft axis. An end effector is pivotally mounted on a distal portion of the wrist member to rotate around a wrist roll axis of the wrist member. The wrist roll axis extends between the proximal portion and the distal portion of the wrist member. The end effector is pivotally mounted to rotate relative to the wrist member around a yaw axis which is nonparallel to the wrist roll axis. A torsion tube is coupled with the end effector base and is rotatable to turn the end effector base around the wrist roll axis of the wrist member. The torsion tube extends through an interior of the elongate shaft to a proximal end opposite from the working end of the elongate shaft. The torsion tube is bendable around the pitch axis with rotation of the wrist member around the pitch axis relative to the working end.