Interchangeable-tool machine interface for a cleaning brush

An attachment comprising:

• a drive interface or an output interface of an interchangeable-tool machine interface that comprises:
• the drive interface;
• and
• the output interface, the drive interface and the output interface being separable and connectable without tools by axial displacement along a common axis of rotation, and the drive interface and the output interface being connectable in several discrete angular positions,
• wherein the output interface comprises:
• a plurality of centering walls;
• a plurality of resiliently displaceable latching walls, the plurality of centering walls and the plurality of resiliently displaceable latching walls arranged so as to be angularly offset from one another in a circumferential direction about the axis of rotation;
• and
• a plurality of torque-transmission walls that are radially parallel to and spaced apart radially from the plurality of centering walls and the plurality of latching walls,
• wherein the drive interface has a plurality of centering and mating latching walls that are arranged so as to be angularly offset from one another in the circumferential direction, the plurality of centering and mating latching walls configured to correspond both to the plurality of centering walls and to the plurality of latching walls of the output interface, and
• wherein, in a connected state of the drive interface and the output interface, each of the plurality of centering and mating latching walls is interposed between (i) an associated one of the plurality of torque-transmission walls and (ii) one of (a) an associated one of the plurality of centering walls or (b) an associated one of the plurality of latching walls.

A cleaning brush or hand-held power tool, comprising:

• a cleaning-brush drive unit;
• a cleaning-brush attachment;
• and
• an interchangeable-tool machine interface comprising:
• a drive interface operably connected to the cleaning-brush drive unit such that the drive interface is driven by the cleaning-brush drive unit;
• and
• an output interface operably connected to the cleaning-brush attachment so as to drive the cleaning-brush attachment, the drive interface and the output interface being separable and connectable without tools by axial displacement along a common axis of rotation, and the drive interface and the output interface being connectable in several discrete angular positions, wherein the output interface comprises:
• a plurality of centering walls;
• a plurality of resiliently displaceable latching walls, the plurality of centering walls and the plurality of resiliently displaceable latching walls arranged so as to be angularly offset from one another in a circumferential direction about the axis of rotation;
• and
• a plurality of torque-transmission walls that are radially parallel to and spaced apart radially from the plurality of centering walls and the plurality of latching walls,
• wherein the drive interface has a plurality of centering and mating latching walls that are arranged so as to be angularly offset from one another in the circumferential direction, the plurality of centering and mating latching walls configured to correspond both to the plurality of centering walls and to the plurality of latching walls of the output interface, and
• wherein, in a connected state of the drive interface and the output interface, each of the plurality of centering and mating latching walls is interposed between (i) an associated one of the plurality of torque-transmission walls and (ii) one of (a) an associated one of the plurality of centering walls or (b) an associated one of the plurality of latching walls.