| 摘要 |
A dual-type damper for damping vibration of a rotation axle, having (a) a damper pulley (12) including a boss portion (26) joined to the rotation axle, a cylindrical portion (28) located radially outwardly of the boss portion, and a connection portion (30) connecting the boss and cylindrical portions; (b) a first damper mass (14) disposed radially outwardly of the cylindrical portion, concentrically with the same; (c) a first resilient member (16) interposed between the cylindrical portion and the first damper mass; (d) a metallic annular member (22) press-fitted onto an inside surface of the cylindrical portion; (e) a second damper mass (130) having a cylindrical shape and disposed between the connection portion and the annular member, in an inner space of the cylindrical portion, concentrically with the cylindrical portion; (f) a second resilient member (134) disposed between the annular member and one axial end of the second damper mass, so as to secure the second damper mass to the annular member and (g) a third resilient member (140) mounted on an outside surface of the second damper mass, or on an inside surface of the cylindrical portion. |
