FITTING STRUCTURE

PROBLEM TO BE SOLVED: To hinder the occurrence of excessive vibration in a rotary shaft 5 by stabilizing fixing condition of a member 3 to be fitted to the rotary shaft 5. SOLUTION: A fitting shaft 7 possible to be tightly fitted in a fitting hole 9 of the fitted member 3 is coaxially and integrally formed with an end surface of the rotary shaft 5, and a first screw shaft 11 is coaxially and continuously formed to the fitting screw 7 for integration. A first male screw part 13 is thread-cut in the outer peripheral surface of the first screw shaft 11, and a first nut 15 is provided in the outer peripheral surface of the first screw shaft 11. A first female screw part 17 to be screwed to the first male screw part 13 is thread-cut in the inner peripheral surface of the first nut 15, and a second screw shaft 19 is coaxially and continuously formed to the first screw shaft 11 for integration. A second male screw part 21 having outside diameter smaller than the inner diameter of the first nut 13 is provided in the outer peripheral surface of the second screw shaft 19 in a direction opposite to the first male screw part 13. A second nut 23 is provided in the outer peripheral surface of the second screw shaft 19, and a second female screw part 25 to be screwed to the second male screw part 21 is thread-cut in the inner peripheral surface of the second nut 23. COPYRIGHT: (C)2006,JPO&NCIPI