| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress scattering of dust generated inside a nut to ball screw installation atmosphere without sucking the dust, by lubricating a ball screw by supplying lubricant inside the nut. <P>SOLUTION: A ball returning route is formed inside the nut 1. Ring shape non-contact seals are arranged at both axial-direction ends of the nut 1. A gap between the non-contact seal 4 and a screw axis 2 is set to 0.1 mm or less. A dust removal hole 7 penetrating the nut 1 in a diameter direction is formed within a range of a track (a rolling path formed by a spiral groove 1a of the nut 1 and a spiral groove 2a of the screw axis 2) of a ball 3, separately from a greasing hole 8. <P>COPYRIGHT: (C)2012,JPO&INPIT |
