| 摘要 |
PURPOSE: A reducer of a driving device for a screen fireproof shutter is provided to increase the efficiency of a driving device and to enable the driving device with a reducer to be integrated with a roller pipe. CONSTITUTION: A reducer of a driving device for a screen fireproof shutter comprises a housing, reductive worm gear array(3,4,5,6), gears(7,71) and a rotating sensor. The housing has a cylinder shape and one end of the housing is connected to a DC motor. The housing comprises a groove, into which a reductive worm gear array can be inserted. The reductive worm gear array consists of two stages so that the central line(31) of the worm of first-stage reductive worm gear row and the central line(61) of the worm wheel of a second-stage reductive worm gear row match with the central line(12) f a motor shaft. The first-stage reductive worm gear row is connected to a DC motor shaft(11). The second-stage reductive worm gear row comprises an output shaft. |
