| 摘要 |
PURPOSE:To stop the swivel motion of a damper when it is rotated at high speed and prevent a damage to the bearing in its pivotally mounted part, by providing a pair of stopper pins radially movable in accordance with the rotational speed of a flywheel further forming the side of the damper into a fan shape. CONSTITUTION:In a dynamic damper of such a constitution that a speed variation of rotation in a drive power source is reduced, a pair of stopper pins 9 radially movable in accordance with the rotational speed of a flywheel 1 are provided, further the side of a damper 7 is formed into a fan shape. As the rotary drive power source increases its rotation at high speed, a weight 13 is caused to move outward with the pins 9 to form narrower clearances between fan-shaped sides 7a of the damper 7 and the pins 9. While as the rotation increases to high speed a variation of torque decreases to cause the damper to swivel in a less degree of angle. When the speed of rotation exceeds a prescribed speed, the weight 13 and the pins 9 reach an outermost position, the pins 9 hold the damper 7 from its both sides to stop its swivel motion. |
