Clamping device with an electric motor

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United States of America Patent

PATENT NO 9281775
APP PUB NO 20140184106A1
SERIAL NO

14004535

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention relates to a clamping device (1), for example swing tensioners (1), bracing elements, machine vises or block cylinders, with a movable clamping element (2) for clamping a workpiece with a defined clamping force, and with an electric motor (10) for mechanically driving the clamping element (2), also with a control unit that controls the electric motor (10). The invention provides that the control unit detects an electrical operating parameter of the electric motor (10) as a measure of the clamping force. The contact of the clamping element with the workpiece is detected in this manner. Subsequently, the electric motor (10) is then driven further by a defined number of revolutions, the number of revolutions after contact with the workpiece defining the clamping force. The invention further comprises a corresponding control method.

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Patent Owner(s)

Patent OwnerAddress
LUDWIG EHRHARDT GMBH35321 LAUBACH

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heidt, Nikolaus Lich, DE 2 7
Kroell, Harald Laubach, DE 10 140
Woerner, Stefan Muenzenberg, DE 34 183

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