Patent ID: 6722005
Filing Date: 2004-04-20
Classification: B23Q,Y10T

Abstract:
A turret, comprising:a relatively stationary housing connectable to a machine tool and having housing elements including a fixed columnar housing element and a base housing element, said columnar housing element having a free end with an outside diameter greater than an outside diameter of said base housing element; a toolholder mounted for rotation about an axis of rotation on said housing, configured for mounting a plurality of machine tools, and connected to said base housing element; an electric drive for rotating said toolholder into a particular operating station for a desired one of the machine tools, said electric drive having a rotor and a stator with coil windings surrounded by said rotor, said toolholder surrounding said stator and said rotor with said rotor being in direct contact on an external circumference thereof with said toolholder and being rigidly connected to said toolholder to transmit torque, said stator having an inner surface in direct contact with said free end of said fixed columnar housing element; and friction reducing bearings arranged axially and radially relative to said axis of rotation and between said columnar housing element and said toolholder; whereby, rotational movement of said toolholder is performed directly by said electric drive without gearing.