| 摘要 |
<p>Disclosed are dynamic dampers for suppressing harmful vibrations excited in a rotary shaft which enable to complete the installation thereof around the rotary shaft by only fixing one end thereof on the rotary shaft without imparing the performances thereof. One of the dynanic dampers are provided with elastic members (11, 12) disposed at both ends thereof, only one of the elastic members (11) has an engaging grove (15a) going round the outer surface thereof, and the inner diameter of one of the elastic members is made larger than that of the other elastic member ( DIAMETER A, DIAMETER B). The other dynamic damper is provided with elastic members disposed at both ends thereof, the elastic members have a supporting portion and an elastic portion, and only one of the supporting portion has a fixing portion having an engaging groove (15a) going round the outer surface thereof and an intermediate portion, the length of the intermediate portion is larger than the length of the supporting portion of the other elastic member in the axial direction of the rotary shaft. With these arrangenments, the dynamic dampers are free from the influence of the deformations resulting from the fixing at one end thereof only. Thus, the dynamic dampers enable to reduce the number of component parts, improve the assembly operability and reduce the manufacturing cost as well.</p> |
