| 摘要 |
<p>A geared motor comprising: an output shaft (14) rotatably received in a housing (11); a sun gear (17) securely supported on the output shaft (14) in the housing (11) and having a plurality of external teeth (21); a ring gear (22) housed in the housing (11) and having a plurality of internal teeth (23) meshed with the external teeth (21) of the sun gear (17), and the internal teeth (23) of the ring gear (22) having a pitch circle larger than that of the external teeth of the sun gear and being larger in number than the external teeth (21) of the sun gear (17); supporting means (24) for supporting the ring gear (22) in such manner that the center axis of the ring gear (22) is eccentrically revolvable with respect to the axis of rotation of the output shaft (14) and the ring gear (22) is prevented from being rotated about its center axis; and drive means (28) for generating electromagnetic forces one group of which has a plurality of force directions radially inwardly directed and the other group of which has a plurality of force directions radially outwardly directed, the different groups being circumferentially successively displaceable and driving the ring gear (22) to radially inwardly and outwardly move so that the output shaft (14) is driven to rotate about its axis of rotation.</p> |
