To provide a finite-rotation motor wherein the life of a bearing for rotatably supporting the rotor thereof is lengthened.
The finite-revolution motor comprises a stator 2, the rotor 1 that is driven by electromagnetic force between the rotor and the stator and is rotated within the range of a finite rotation angle, and the bearings 8 that rotatably support the rotor. The bearings include first cylindrical members 9 fixed on the rotor and second cylindrical members 11 that are placed on the inner circumferential surface or the outer circumferential surface of the first cylindrical members and are rotatable relative to the first cylindrical members. The motor is provided with bearings 13 for second cylindrical member that rotatably support the second cylindrical members and an actuator 17 that rotationally drives the second cylindrical members.
SAITO MITSUNORI
INOUE MASAO
IMASHIRO AKIHIKO
