| 摘要 |
<p>A device for controlling the sweeping angle of a fan comprises a casing; a main gear (5) meshing with a shaft of a worm gear (3); a spindle (7) and a hollow shaft (6); said main gear (5) is mounted on one of said spindle (7) and said hollow shaft (6), said spindle (7) being rotatably concentrically placed within said hollow shaft (6); a planetary carrier (9) fixedly mounted on one end of said hollow shaft (6) carrying a planet gear (11) rotatable around its own axis; a crank pin (10) fixed on said planet gear (11); a connecting bar (14) with its one end articulated on said crank pin (10); a sun gear (12) integrated with one end of said spindle (7) and meshing with said planet gear (11); a clutch means (16-18) disposed between said spindle and said hollow shaft and an adjusting means (19-21) for controlling said clutch means.</p> |
