Patent ID: 8498555
Filing Date: 2013-07-30
Classification: G03G,H02K

Abstract:
1. A rotary driving device comprising: a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member; a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof; a driver for rotating the rotary shaft about the axis thereof; a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, the mounting hole being aligned along a central axis set parallel to the axis of the rotary shaft; a pendulum loosely fitted in the mounting hole, the pendulum being caused to move radially outward within the mounting hole due to a centrifugal force produced by rotary motion of the disk on the rotary shaft; and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the pendulum is moved radially most outward in the mounting holes; wherein the disk has first and second surfaces facing in opposite directions, wherein the mounting hole is a conical hole having a diameter gradually increasing from the first surface toward the second surface, wherein the pendulum is a spherical body having a diameter larger than both a minimum diameter of the conical hole and the thickness of the disk, and wherein the adjustment mechanism includes a positioning disk arranged in face to face relation with the second surface and slidably and coaxially fitted on the rotary shaft and a locking member keeping the positioning disk from moving.