| 摘要 |
PROBLEM TO BE SOLVED: To efficiently convert axial force of a bolt into torque in the direction for expanding an annular groove in a fastener to fix a fastener main body and a shaft and a fastener and a mechanism element having a hole fitted to this or the like by expanding the annular groove by pressing a male taper ring in the annular groove of the fastener main body by fastening force of the bolt. SOLUTION: In an annular fastener main body 2, an annular groove whose thickness gradually changes and a bolt inserting hole to communicate with this annular groove, are bored in the shaft direction. In a male taper ring 12, a diameter of an inside diameter part and an external shape part gradually changes in the shaft direction, and a screw hole for a bolt is bored in the shaft direction. A bolt 24 inserted into the bolt inserting hole is screwed in the screw hole of male taper ring 12 fitted to and inserted into the annular groove, and the male taper ring 12 is pulled in the annular groove by axial tension of the bolt 24, and the annular groove is expanded, and a shaft 20 fitted to and inserted into the inside diameter part of the fastener main body 2 and the fastener main body 2, and the fastener main body 2 and a mechanical element 22 having a hole fitted to this, are fixed together. Coating surfaces 16 and 18 of a solid lubricant are formed on an inside diameter surface and an outside diameter surface of the male taper ring 12. |
