| 摘要 |
PURPOSE:To make it possible to prevent an impact force from acting on a rotor by arranging bearings on both sides of a rotary actuator, and providing a casing with a bearing for supporting an output shaft and for preventing the output shaft from moving in the axial direction. CONSTITUTION:A movable base 20 is provided with a rotary actuator 25 on both sides of which are formed a supporting part 26. The supporting part 26 is fitted with bearings 27 with their axes directed in the fore-and-aft direction. The rotary actuator 25, being fixed to the movable base 20 and supported by a shaft 28 penetrated by a linear ball bearing 27, is freely slidable in the fore-and-aft direction. The rotary actuator is moved in the fore-and-aft direction by means of a piston cylinder arranged on the movable base 20. An output shaft of the rotary actuator 25 is provided with a rotor arm 31.
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