| 摘要 |
A power sanding machine ( 10 ) has three circumferentially spaced cogged belts ( 40 ) to drive three discs ( 52 ) rotatably mounted to an inner bowl ( 30 ) which is rotatably mounted to a housing ( 12 ), which in turn is connected to an operating handle ( 14 ). Mechanical lock can rotationally affix the inner bowl ( 30 ) to the housing to circumferentially position a pulley at the left or right edge ( 326, 322 ) of the sanding machine or at the front end ( 330 ) of the sanding machine. Power cleaning and sanding machines ( 412, 500, 600 ) incorporate the three disc ( 52 ) arrangement or a direct-drive one disc arrangement ( 572, 672 ). The machines ( 412, 500, 600 ) include multiple floor finishing units ( 420, 514, 614 ) ganged together in unique arrangements.
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