| 摘要 |
In a reduction gears-integrated actuator that is provided with harmonic reduction gears 14, an electric motor 7 and a rotation position detector 26, the rotor 11 is composed of a cup-shaped rotation yoke 12, a permanent magnet 13 is fixed on the outer circumference of the rotation yoke 12, a circular spline 15 is formed to be like a silk hat, the flange portion 15a is fixed at one end portion of the actuator frame 2, and the cylindrical portion 15b is disposed opposite to the inner circumference of the rotation yoke 12 via a gap. A cup-shaped housing 18 that is coupled to the output shaft 5 is provided on the inner circumferential side of the flexible spline 16 between the output shaft 5 and the rotation shaft 6, and an elastic member 25 that gives a preload is provided between the housing 18 and the bearing 21 for supporting the rotation shaft 6, whereby it is possible to shorten the length of the actuator in its axial direction, and a drive torque can be increased without running counter to downsizing and lightening of the weight thereof. That is, it is possible to provide an inexpensive reduction gears-integrated actuator. <IMAGE> |
