Patent ID: 6901831

Claim:
A fixture ( 1 ) for supporting a workpiece in a machine tool ( 2 ), in particular a crankshaft in an inclined-bed turning and milling machine, by means of two support elements ( 14 , 15 ) arranged at a lateral distance from one another and radially moveable in relation to a workpiece ( 3 ), the support elements ( 14 , 15 ) being held in a housing ( 11 ), having the workpiece ( 3 ) lying on them and with their ends facing away from the workpiece ( 3 ) being formed as two levers ( 16 , 17 ) in a swiveling mounting in the housing ( 11 ), in which case the levers ( 16 , 17 ) are driveably connected to one another by a threaded spindle ( 31 ), with the threaded spindle ( 31 ) displaying counter-rotating thread sections ( 32 , 33 ) in its areas corresponding to the two support elements ( 14 , 15 ), with each of the threaded sections ( 32 , 33 ) engaging in a sliding block ( 37 or 38 ) and held in a rotating mounting in holes ( 35 , 36 ) worked into the support elements ( 14 , 15 ) at an angle perpendicular to the threaded spindle ( 31 ): characterized in that, the threaded spindle ( 31 ) is provided with a locking device ( 51 ) for locking it in the operating position to which it is set, the locking device ( 51 ) for the threaded spindle ( 31 ) comprising an adjusting element ( 52 ) connected to the housing ( 11 ) of the fixture ( 1 ), through which the threaded spindle ( 31 ) is passed, and two expanding wedges ( 57 , 58 ) which interact with the threaded spindle ( 31 ) and the adjusting element ( 52 ).