Patent ID: 6619896
Filing Date: 2003-09-16
Classification: B23B,Y10S,Y10T

Abstract:
A device for releasably connecting a tool to a machine spindle, comprising a tool shank projecting on the tool, a connecting sleeve projecting on the spindle coaxially to the spindle axis and having a recess for accommodating the tool shank, and a clamping mechanism which engages in the region between the tool shank and the connecting sleeve and has an essentially radially movable clamping bolt, the radial movement of the clamping bolt being convertable in the manner of a wedge drive into an axial clamping movement between the tool shank and the connecting sleeve, the clamping mechanism having an actuating nut screwed onto an external thread, coaxial to the spindle axis, of the connecting sleeve, the axial movement of the connecting sleeve, during the clamping operation, with an axially displaceable intermediate ring arranged in a non-rotatable manner on the outside of the connecting sleeve and disposed between the actuating nut and the clamping bolt, being convertable into the radial movement of the clamping bolt, the clamping bolt being radially guided in a guide bore passing through a sleeve wall of the connecting sleeve and having a bolt wedge surface at an end projecting outwardly beyond the guide bore, the axially displaceable intermediate ring having an intermediate wedge surface bearing against and complementary to the bolt wedge surface of the clamping bolt, the intermediate wedge surface being defined by two lateral guide surfaces which face one another in the circumferential direction, are oriented in an axially parallel manner, laterally overlap a radially projecting end of the clamping bolt and in the process form an anti-rotation locking means for the axially displaceable intermediate ring.