CIRCULATING COMPONENT, MOVEMENT GUIDING DEVICE USING CIRCULATING COMPONENT, AND BALL SCREW

摘要

PURPOSE: To provide a circulating component surely picking up a spacer even if a clearance is formed between balls and to provide a ball screw using the circulating component. CONSTITUTION: A plurality of balls 11 and the plurality of spacers 16 are interposed between a screw shaft 9 of the ball screw and a nut 10 assembled to the screw shaft 9. The circulating component 12 is formed with a pickup groove 22 contacting with the balls in the both edges of the groove and picking up the balls 11 in a ball rolling passage and is provided with a spacer pickup part 23 contacting with the spacer 16 without contacting with the balls 11 and picking up the spacer 16 in the ball rolling passage.