Patent ID: 7473060
Filing Date: 2009-01-06
Classification: B23B,B23Q,Y10T

Abstract:
1. A clamping device for clamping a tool or tool holder ( 2 ) in a machine spindle ( 1 ), comprising a drawbar ( 6 ) that has a longitudinal axis and that can axially move between a clamping position and a release position, a clamping spring ( 18 ) for actuating the drawbar ( 6 ) in the direction of the clamping position, a minimum of one sensor ( 20 ) that is disposed within the machine spindle ( 1 ) for monitoring the clamping force, and a clamping cone ( 8 ) disposed on the front end of the drawbar ( 6 ) and having a plurality of clamping elements ( 9 ) resting against its outside surface, which clamping elements, via the axial movement of the clamping cone ( 8 ) by means of the drawbar ( 6 ), can be moved back and forth between a clamping position in which the tool or tool holder ( 2 ) is retained and a release position in which the tool or tool holder ( 2 ) is released, characterized in that a transponder assembly ( 26 , 27 ) with a stationary stator ring ( 27 ) and a rotor ring ( 26 ) that can be axially moved within the stator ring ( 27 ) by the lifting movement of the drawbar ( 6 ) is dedicated to the sensor ( 20 ) for the wireless transmission of sensed data and of energy.