| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamic damper having high shaft perpendicular spring characteristics regardless of the diameter size of a hollow propeller shaft, providing resonance characteristics from a low frequency region to a high frequency region, reducing cost by reducing metal portions, and easily fitted. SOLUTION: This dynamic damper is provided with: a damper mass 3 loosely fitted into the hollow shaft 2; fitting members 4, 5 positioned in both end sides of the damper mass 3 and fixed inside the hollow shaft 2 by compression; and connection members 7, 8 elastically connecting the damper mass 3 to the fitting members 4, 5 in the both sides so as to have the same axis 6 and inclined to the same axis 6. Due to this configuration, roles of the fitting members 4, 5 and the connection members 7, 8 are separated, and in the connection members 7, 8, a shearing component and a compression component become dominant. If the mass and rigidity of the connection members 7, 8 are adjusted, resonance characteristics are provided in a wide range of frequency while high shaft perpendicular spring characteristics are maintained. This promotes cost reduction and also facilitates manufacturing. COPYRIGHT: (C)2007,JPO&INPIT
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