Electric power tool

An electric power tool includes an output shaft, drivable by an associated drive motor, and a brake apparatus for braking the output shaft rotating in the unpowered state of the associated drive motor. The output shaft is mounted in a rotatable manner in an associated housing and the brake apparatus...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Bayer, Heiko, Laber, Sebastian, Esenwein, Florian, Lutz, Manfred
Format:	Patent
Sprache:	eng
Schlagworte:	COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING DRESSING OR CONDITIONING OF ABRADING SURFACES DYNAMO-ELECTRIC MACHINES ELECTRICITY FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GENERATION GRINDING HAND TOOLS MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MANIPULATORS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS POLISHING PORTABLE POWER-DRIVEN TOOLS TRANSPORTING
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Beschreibung
Zusammenfassung:	An electric power tool includes an output shaft, drivable by an associated drive motor, and a brake apparatus for braking the output shaft rotating in the unpowered state of the associated drive motor. The output shaft is mounted in a rotatable manner in an associated housing and the brake apparatus has a magnetic-field brake unit with at least one first and one second brake element. The first brake element is arranged radially with respect to the output shaft in a rotationally fixed manner in the associated housing and includes at least one first and one second magnetic pole configured to generate a magnetic field that alternates in the circumferential direction of the output shaft. The second brake element is magnetically conductive and rotationally connected to the output shaft via an activatable coupling device.