| 摘要 |
A motor-rotatable plate (1) for a floor cleaning machine has pivot bearings (4) for cleaning tools (2) located in open recesses (3) on the underside thereof. Each pivot bearing (4) consists of a tubular housing part (5) captively disposed in a respective recess (3), a bearing (6) disposed in the housing part (5), a bearing journal (7), one end of which is disposed in the bearing (6), a sleeve part (9) made of plastics moulded onto the free protruding end (8) of the bearing journal (7), the sleeve part (9) having axially extending rigid arms and radially resilient detent arms, onto which a cleaning tool (2) with a corresponding fitting can be located and locked. The opposed end faces of the housing part (5) and the sleeve part (9) each have one of an engaging tongue (10) or groove (11) forming a labyrinthine seal, and an elastomeric or rubber-type seal (12), between the inner wall of the housing part (5) and the bearing journal (7).
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