DIRECT-ACTING ACTUATOR OF INDUSTRIAL ROBOT.

摘要

The direct-acting actuator of an industrial robot which can fit and remove an elongated feed screw rapidly and safely within a limited work space. When a ball screw is to be fitted, the upper and lower end portions of the ball screw inserted diagonally into an inner space of a column (10) are fitted into holes (12a, 33a) of an upper plate and sheet member through a passage (12b) formed on a column upper plate (12) and opening in that end surface of this upper plate on the slider side and through a passage (33b) formed on the sheet member (33) of a slider (30) and opening in the tip surface of the sheet member respectively. The lower end of the ball screw is connected to a decelerator (52) and a bearing unit (22) fitted to the upper end of the ball screw and ball nut (34) meshed with the ball screw are fitted into the holes, respectively. Then, the bearing unit and the ball nut are fixed to the upper plate and to the sheet member, respectively. The ball screw can be removed in the procedures reverse to those described above.