Patent ID: 7988581
Filing Date: 2011-08-02
Classification: F16H

Abstract:
1. A rotation output device comprising: a reduction gear transmission that comprises an input shaft having an eccentric rotation member that rotates eccentrically with the rotation of the input shaft, an external gear that has a through hole at its center and revolves orbitally while engaging with the eccentric rotation member, and an internal gear that surrounds the external gear while meshing with the external gear and allows the orbital revolution of the external gear, the internal gear has a number of teeth differing from the number of teeth of the external gear; a rotating disk that is fixed to one of the external gear and the internal gear at one end of the reduction gear transmission in an axial direction of the reduction gear transmission; a columnar bar that extends from the rotating disk and passes through the external gear, extends longer than the input shaft, and projects from the other end of the reduction gear transmission, the columnar bar rotates together with the rotating disk; and, a rotation angle detecting member that is attached to the columnar bar at outside of the reduction gear transmission and detects a rotation angle of the rotating disk; and a control device that controls a motor in accordance with a detecting signal of the rotation angle detecting member; wherein the rotating disk rotates with the rotation of the input shaft.