| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a superior effect of reducing dust generation than conventional ball screws by preventing dust generated within a nut from exiting outside as much as possible. <P>SOLUTION: A ball return path is formed within the nut 1, and ring-like non-contact seals 4 are disposed on both ends of the nut 1 in the axial direction. In addition to a greasing hole 8, a suction hole 7, which penetrates the nut 1 in the radial direction, is formed within the range of the track of the ball 3 (a rolling path formed from the spiral groove 1a of the nut 1 and the spiral groove 2a of a screw shaft 2). <P>COPYRIGHT: (C)2011,JPO&INPIT |
