| 摘要 |
PURPOSE:To improve a coupling force and to facilitate a mounting work, by a method wherein a tightening metal for power transmission is formed with an inner ring, which has a spiral projection on its outer peripheral surface and can be decreased in size, and an outer ring which engages with the inner ring and can be increased in size. CONSTITUTION:A tightening metal is formed with an inner ring 28, which has a saw tooth-shaped projection 31 provided on its outer peripheral surface in a spiral manner along the direction of an axis, and an outer ring which has a saw tooth-shaped projection 33 engaged with the projection 31 and provided on its inner peripheral surface in a spiral manner. The tightening metal is coupled such that the inner and outer rings 28 and 29 are assembled together in a manner to gear the two projections 31 and 33 with each other, the inner ring is decreased in size to bring it into pressure contact with a shaft-shaped part 20, and the outer ring 29 is increased in size to force it into pressure contact with a ring- shaped part 21. This causes the two rings to be forced into pressure contact with each other through a high contact pressure, resulting in an increase in a coupling force and facilitation of a mounting work. |
