Patent ID: 11969850
Assignee: nan
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. A power tool, including a hand-held and hand-guided random orbital polishing or sanding power tool, comprising:
a static body, a motor, an eccentric element driven by the motor and performing a rotational movement about a first rotational axis, and a plate-like backing pad connected to the eccentric element in a manner freely rotatable about a second rotational axis, first and second rotational axes extending substantially parallel to one another and are spaced apart from one another;
at least part of an external circumferential surface of the eccentric element having an at least discrete rotational symmetry in respect to the first rotational axis so as to form a rotationally symmetric part of the eccentric element;
the power tool having at least one first bearing provided between the rotationally symmetric part of the external circumferential surface of the eccentric element and the static body of the power tool so that the eccentric element is guided in respect to the static body in a manner rotatable about the first rotational axis; and
the power tool having a mechanical gear arrangement with at least two meshing gear wheels, the mechanical gear arrangement being provided functionally between a driving shaft driven by the motor and the eccentric element, and at least one of the at least two meshing gear wheels being attached to the eccentric element in a manner adapted for transmitting torque to the eccentric element, wherein
the mechanical gear arrangement comprises a first central gear wheel, a plurality of first pinion gear wheels meshing the first central gear wheel, a plurality of second pinion gear wheels each located coaxial to one of the plurality of first pinion gear wheels and attached thereto in a torque proof manner or forming an integral part of the respective first pinion gear wheel, and a second central gear wheel meshing the plurality of second pinion gear wheels; and
the second central gear wheel is attached to the eccentric element in a torque proof manner or the second central gear wheel forms an integral part of the eccentric element.