Patent ID: 6669416
Filing Date: 2003-12-30
Classification: B23Q,F16D,H02K,Y10T

Abstract:
A driving head for the numerically controlled setting movements around at least one axis of rotation of a tool spindle comprising:a housing through which the at least one axis of rotation extends; and at least one multi-pole external rotor motor arranged concentrically in relation to one axis of rotation and comprising: a ring-shaped soft-magnetic stator with single pole windings inserted in said housing; a ring-shaped rotor yoke disposed around said ring-shaped soft-magnetic stator, wherein said ring-shaped rotor yoke has an end side; permanent magnets fitted between said ring-shaped rotor yoke and said ring-shaped soft-magnetic stator; a rotor body connected to said end side of said ring-shaped rotor yoke, wherein said rotor body is rotatably supported in said housing; and a deformable diaphragm that is disposed around said rotor yoke under the pressure of fluid for blocking said rotor yoke and forming a blocking device.