| 摘要 |
PURPOSE:To attain high precision by making detachable a rotor and a stator of an electric motor integrated with a boring edge and reducing weight put on an automatic drill or movable parts of a boring robot. CONSTITUTION:A stator (magnet) 9 is fixed to the interior of a rear lid 10 inserted into an exterior cylinder 1, and bearings 11, 12 are provided in the middle of the interior of said lid. A rotor shaft 2 is provided with a rotor (coil) 14 which winds round the stator 9, while a boring edge 3 is fixed on the other end of the shaft 2. Since the automatic drill is thus light in weight of its movable parts, it is improved in high speed responsiveness and precision. |
