| 摘要 |
PURPOSE:To dispense with a traction device which is customarily provided separately from a polishing unit so as to reduce the size of the device and the working space, and further dispense with the attaching and detaching work of peripheral apparatuses so as to improve working efficiency. CONSTITUTION:This drive device of a hole inner surface polishing unit is provided with a grinder which is inserted in the rotor bore 11 of a turbine rotor 12 capably of advancing and retreating so as to polish the inner surface. Further, it is provided with a feed motor 37 for travel working loaded on a device main body, hollow arms 39, 45 pivotally supported with the device main body at the base end, travelling wheels 40, 46 mounted on the extreme ends of the hollow arms 39, 45, drive force transmitting mechanisms 38, 44 which are mounted in the hollow arms 39, 45 and constituted of a plurality of bevel gears 55, 56, 57, 58, 59 to transmittedly drive the feed motor 37 for travel working and the travelling wheels 40, 46, and oscillating links 41, 47 to be connected to the hollow arms 39, 45 and oscillates them. |
