| 摘要 |
A dynamic damper mounted on a rod-shaped oscillating member includes: a cylindrical metallic mass member formed of sintered metal or forging and adapted to be disposed radially outwardly of the oscillating member; two elastic support members formed on axially opposite sides of the metallic mass member to elastically support the metallic mass member; and an elastic covering layer integrally formed with the elastic support member and fixed in close contact with substantially the entire area of the surface of the metallic mass member. The metallic mass member has at least two slits extending through a wall thickness thereof, which are open in and extending axially inwardly from axially opposite end faces of the metallic mass member, respectively, and are filled with the elastic covering layer. The metallic mass further has inclined planes formed at radially inner edges of circumferentially opposite open-end edge portions of each slit. The inclined plane extends over an inner surface of the corresponding slit, the corresponding axial end face of the metallic mass member and the inner circumferential surface of the metallic mass member, to chamfer the radially inner edge of the corresponding open-end edge portion.
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