| 摘要 |
PROBLEM TO BE SOLVED: To firmly fix a shaft and a gear together by forming tapers in the same direction on the inner circumferential face of a hole in the gear and on the outer circumferential face of a cylinder part and forming a slit in the axial direction in the cylinder part. SOLUTION: According to force fitting of a bush 30, forces F1, F1 narrowing a slit S are applied to a cylinder part, 31, while forces F2, F2 deflecting opposed end parts 35, 35 inward are applied. These forces F1, F2 are applied by means of the inner circumferential face of a gear as reaction forces of force fitting of the bush 30. Therefore, the bush 30 functions as a cylindrical wedge which narrows the slit S of the cylinder part 31 according to its force fitting so as to fasten a shaft 10. In this way, the shaft 10 and the gear are fixed to each other firmly. As the tip part works so as to bite the shaft 10, the shaft 10 and the gear are fixed together more firmly. |
