Stepping Motor With Shaft to Translation
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
A third coil is added to a conventional stepping motor for the purpose of shifting the rotor and shaft of the motor along their axis. This translational motion of the stepping motor is useful in achieving a dual function from the motor. In Fig. 1, a conventional stepping motor is shown. This motor with a rotor 10 and shaft 12 does not have translational motion. The stepwise rotation of shaft 12 is accomplished by selectively energizing coils 1 and 2. In Fig. 2, coil 3 has been added for the purpose of shifting rotor 14 and its shaft 16 along the axis of rotation. When coil 3 is energized, rotor 14 and its shaft 16 shift along the axis of rotation towards the bottom of Fig. 2. Shaft 16 rides in bearings 20 and 22. In an energized position, shaft 16 extends further out from the bottom edge of bearing 20.