| 摘要 |
PURPOSE:To prevent the damage of a coupler of a boss of a cup of a flywheel by forming thinly the thickness of the intermediate part between the coupler and a permanent magnet holder, thereby suppressing the vibration produced at the holder side to be transmitted to the boss. CONSTITUTION:A boss 17 fixed to a crankshaft and a cup 18 which holds a permanent magnet 13 are integrated, for example, by a plastically coupling coupler 18, thereby forming a flywheel 12. In this case, the thickness of the intermediate part 23 between the coupler 19 and the part whitch holds the permanent magnet is formed thinly as compared with the thickness of the part which holds the permanent magnet 13, thereby isolating the flywheel 12 into the rigid boss 17 side and the cup 18 side. The boss 17 and the cup 18 may be coupled with rivets. |
