| 摘要 |
<p>The apparatus which reduces the rotational speed of the motor and increases the torque thereof includes a transmission spindle shaft (24) rotating in a first rotational direction. A circular gear (28) having two sets of external gear teeth (34, 36) is operatively connected to the transmission spindle shaft for rotational movement thereby. An annulus gear (38) is fixedly disposed, such as for example by the surrounding transmission housing, and has internal gear teeth (40) which are engageable with the first set of external gear teeth (34) of the circular gear (28) upon overlap therebetween. An eccentric (26) is fixedly mounted on the transmission spindle shaft (24) and freely mounts the circular gear (28) thereon for maintaining the circular gear (28) and the annulus gear (38) in overlapping relationship, thus engaging the respective gear teeth thereof. By means thereof, the circular gear (28) traces a hypocycloid at reduced rotational speed within the annulus gear (38) in a second rotational direction opposite to the first rotational direction of the transmission spindle shaft (24). A rotatable drive hub (42) having internally disposed teeth (44) is disposed to surround a portion of the circular gear (28) and to receive the reduced rotational speed thereof by means of the overlap between the circular gear (28) and the drive hub (42). An output shaft (46) is connected to the drive hub (42) for receiving and transmitting the reduced rotational speed output. The various gears may preferably be made of a non-machined material, such as forged, cast, molded or extruded metal, plastic or other relatively rigid and durable material.</p> |
