PURPOSE: To prevent the inversion phenomena of an output by comprising a primary coupling plate attached to a rotor, a secondary coupling plate attached to an output shaft, and a connecting rod, and arranging the connecting rod on the side of the rotor than the rotor rolling face.
CONSTITUTION: A coupling device 41 comprises a primary coupling plate 42, a secondary coupling plate 43, and a connecting rod 44. The primary coupling plate 42 and the secondary coupling plate 43 are coupled by the connecting rod 44, and the connecting rod 44 is held freely in diametrical direction by the secondary coupling plate 43, absorbs the eccentric motion of the rotor 11, and transmits only the rotation from the primary coupling plate 42 to the secondary coupling plate 43. Besides, since the connecting rod 44 is positioned in the side inner than the rotor rolling face 5, the reverse rotation of the connecting rod 44 vanishes, and the secondary coupling plate 43 and the output shaft 21 of the coupling device do not rotate reversely, and the inversion of the motor output can be prevented.
OBA MASATOSHI
SAKATA MINORU
