| 摘要 |
PURPOSE:To provide a motor in which an accelerating mechanism employing ball bearings is built, by securing one of an outer race and a retainer on a motor casing, transmitting the rotation of a rotor to the other and picking off an accelerated output from an inner race. CONSTITUTION:A magnet 13 and a yoke 14 constitute a rotor. One end of the yoke 14 is secured on the retainer 5 of an antifriction ball bearing 1. A coil 16 and a yoke 17 constitute a stator. The yoke 17 is secured on a casing 18. An outer race 2 is secured on the upper plate 18a of the casing 18. An output shaft 20 is fixedly fitted in an inner race 3 and supported at its lower part by a bearing 21. When magnetic flux passing through a magnetic circuit constituted by the magnet 13 and the yokes 14, 17 is interlinked with a current flowing through the coil 16, a prescribed turning force acts to the rotor. As a result, two kinds of speeds, one of which is the speed of the rotor and the other of which is the heightened speed of the rotor, can be obtained from a single motor. |
