| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a rolling-element screw device easily formed in an outer diameter portion of a nut body with recesses for fitting circulation parts. <P>SOLUTION: At both ends of a straight passage 5 of the nut body 2, the pair of circulation parts 8 are provided, in each of which a direction change passage 6 is formed for connecting a loaded rolling-element rolling passage 3 and the straight passage 5. The pair of circulation parts 8 are respectively fitted in the pair of recesses 15 formed in the outer diameter portion of the nut body 2. The direction change passage 6 of each circulation part 8 has a curve passage connected to the loaded rolling-element rolling passage 3. The curve passage is formed in such a way that, when seen in the axial direction of the nut body 2, the track of the centerline of a rolling element moving in the curve passage forms a circular curve. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
