STEPPING MOTOR Russian patent published in 1997 - IPC

FIELD: electromechanical automatic-control devices and systems with stepping rotation of output shaft. SUBSTANCE: armature 4 and electromagnet yoke 1 are multipole coaxial members of similar geometry forming magnetic circuit divided by working air gaps and embracing coil of electromagnet 3. Working air gaps are uniformly distributed over circumference with center aligned with common axis of yoke 1 and winding 3. Electromagnet yoke 1 is placed in motor frame. Armature 4 is mounted on shaft 5 whose extension carries dogs of ratchet 9 mounted on spider 8. Respective ratchet gear 10 is fixed on extension of other shaft 11 which carries other ratchet gear 12. Its dog is secured to frame. Butt ends of shafts are coupled through roller 14 and mounted in bearings 15, 16 and 17 and are free to run relative to each other. Electromagnet yoke 1 and armature 4 are mechanically joined by means of springs. EFFECT: improved design. 2 dwg