Automatic balancing mechanism for a rotor

摘要

A weight member (33) is attached to a rotor (25) so as to forcibly offset a center of gravity of a rotor from a rotating axis (28), centrifugal force moves two movable weight members (29/30) to appropriate positions for canceling the unbalance due to the center of gravity offset from the rotating axis, and stoppers (31/32) restrict the movement of the two movable weight members in a sectoral area (AR1) opposite to the center of gravity so that the rotor is free from vibrations due to the characteristic angular velocity. <IMAGE>