| 摘要 |
PURPOSE:To make a damper smaller by reducing the axial length of a hub with a damper weight fitted into inner and outer surfaces of a cylindrical rib turning together with a rotating shaft. CONSTITUTION:A hub 2 is formed cylindrically with a step and a small diameter section, namely, a boss section 2a thereof is mounted at the end of a crank shaft 1 in such a manner as to turn together with the shaft 1 through a key 3 with a large diameter section 2b projecting toward the side of the crank shaft 1. A first damper weight 4 is provided on the outer surface of the hub 2 while a second damper weight 5 on the inner surface thereof. The first damper weight 4 is for eliminating vibration of the crank shaft 1 at the high speed rotation and the second damper weight 5 for eliminating vibration thereof at the low speed rotation. |
