Importance

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Abstract

A dynamic damper that has high lateral spring characteristics regardless of the size of a hollow propeller shaft and enables resonance characteristics to be obtained from low to high frequency ranges, wherein metal components are reduced and costs are lowered without bonding, and the dynamic damper is easily mounted. The dynamic damper has a damper mass (3) that freely fits into a hollow shaft (2) and is covered on the surface with an elastic member; mounting members (4, 5) that are disposed at the two ends of the damper mass (3) and are composed of elastic members fixed by compression inside the hollow shaft (2); and elastic connecting members (7, 8) that elastically and integrally connect the damper mass (3) to the mounting members (4, 5) so that the damper mass and mounting members have the same axis (6), and that are inclined in relation to this axis (6). The roles of the mounting members (4, 5) and the connecting members (7, 8) can thereby be divided, sheared components and compressed components play a major role among the connecting members (7, 8), and adjusting the mass and rigidity of the connecting members (7, 8) allows high lateral spring characteristics to be maintained, resonance characteristics to be achieved in a wide range of frequencies, and the dynamic damper to be easily manufactured at low cost.

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First Claim