HOLLOW ACTUATOR

To provide a hollow actuator whose signal line hardly becomes obstructive when connecting an output member with a driven member, in which a radio wave noise of an external environment is difficult to enter the signal line for transmitting a signal from a rotation sensor arranged around the output member.SOLUTION: An annular output member 5 and a rolling bearing 4 are arranged at a position being closer to one side in an axial direction with respect to a hollow motor 1. A signal line 10 connected to a rotation sensor 9 for detecting rotation of the output member 5 extends onto the other side in the axial direction with respect to a motor axis 1b by passing through a hollow hole of the motor axis 1b.SELECTED DRAWING: Figure 1 【課題】出力部材の周囲に配置された回転センサからの信号を伝送する信号線へ外部環境の電波ノイズが侵入しにくく、その出力部材と被駆動部材の連結の際に信号線が邪魔にならない中空アクチュエータを提供する。【解決手段】中空モータ１に対して環状の出力部材５及び転がり軸受４が軸方向一方側に寄った位置に配置され、その出力部材５の回転を検出する回転センサ９に接続された信号線１０が、モータ軸１ｂの中空孔を通過してモータ軸１ｂに対して軸方向他方側に出ている。【選択図】図１