| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin nut reducing partial wear of a screw thread and extending the service life even under a high contact pressure condition, and also to provide a sliding screw device using the nut. SOLUTION: The nut 3 is screwed with a screw shaft 1, is axially moved relatively with the screw shaft 1, and has a predetermined wall thickness. The predetermined wall thickness can approximately uniformize contact pressure distribution in an axial direction in contact faces of the nut and the screw shaft when the load is applied to the nut in an axial cross-section of the nut, and the contact pressure distribution is acquired by heat transmission-structure interaction analysis by a finite element method using two-dimensional axisymmetric model of the nut. The predetermined wall thickness is formed so that the expression of (the predetermined wall thickness)/(length in an axial direction of the resin nut) is within a range of 0.1-0.24. COPYRIGHT: (C)2009,JPO&INPIT
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