US Patent 7316050 Vacuum cleaning tool having an exchangeable attachment

A cleaning tool for a vacuum cleaning device has a housing and a motor arranged in the housing. A tool carrier and a rotatingly driven working tool are provided. The working tool has two ends rotatably supported in the tool carrier. The tool carrier and the working tool form a changing unit. The tool carrier is detachably secured on the housing by catch elements. A gear system is connected between the motor and the working tool, wherein the motor drives via the gear system the working tool. The gear system has a driving wheel driven by the motor and a driven wheel fixedly connected to the working tool. The tool carrier and the housing have wall sections that overlap one another and align the tool carrier relative to the housing and the driven wheel relative to the driving wheel when the changing unit is inserted into the housing.