| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent balls from bumping against each other when a nut moves down, to ensure smooth rolling of the balls when a ball screw is vertically used. <P>SOLUTION: A cylindrical recess 13 is formed in a lower part of a straight path 11, to form a ball delivering member 5 having a ball passing hole 6. A protrusion 61 making an inner diameter of the ball passing hole 6 smaller than the diameter of a ball 3 is formed radially outside the ball passing hole 6 so as to be elastically deformable. The ball 3 falling from the straight path 11 temporarily stops on the protrusion 61 of the ball delivering member 5. The protrusion 61 elastically deforms by the weight of the ball 3. The return force of a movable piece 53 having opened outward delivers the ball 3 to the curved path 41. Each of the plurality of balls 3 is delivered to the curved path 41 at intervals. On a top surface 51 of the ball delivering member 5, a circular hole 8 is formed for housing a protrusion of a rotary jig to be used for removal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
