| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ball screw which is low in cost and compact in size, and improved in durability and reliability.SOLUTION: A cylindrical link member 7 is externally fit to a nut 3, a support hole 6 is formed on a line passing through a center of a screw shaft 2 while mutually opposing a part of an external peripheral face of the nut 3, the link member 7 has a wing 9 which is arranged at the external peripheral face while opposing it, and connected to a drive part, a round hole 7a is formed at part of the external peripheral face while mutually opposing it, one end of a pivot shaft 8 is pressure-fixed to the round hole 7a, and the other end of the pivot shaft 8 is fit and inserted into the support hole 6 via a prescribed clearance. Even if there is an assembling error or the like, the link member 7 can turn independently from the nut 3, a moment load applied to a ball screw 1 is thereby absorbed, and the generation of prying which influences a life of the ball screw 1 between the nut 3 and the screw shaft 2 can be prevented.</p> |
