DEVICE FOR TIGHTENING AND RELEASING THE CONICAL ROD OF A TOOL OR AN ACCESSORY ON A MACHINE-TOOL, ESPECIALLY ON A BORING MACHINE OR MILLING MACHINE

摘要

P THIS DEVICE INCLUDES A HOLLOW SPINDLE 2 MOUNTED IN A HOUSING 1 AND WHICH HAS AT ITS LOWER END, REGARDING THE CONICAL ROD 5, A RECEIVING CONE 4. A CLAMPING ROD 8 IS MOUNTED WITH ROTATION AND SLIDING BETWEEN A LOWER STOPPER 14 AND UPPER STOP 15, AND PRESENT AT ITS LOWER END, ORIENTED TOWARDS THE ROD 5 OF THE TOOL, A THREAD 9 WHICH CAN BE SCREWED INTO THE SAID ROD AND OF WHICH THE UPPER END IS CONNECTED TO A MOTOR 18 IN A WAY TO TURN WITH HIM, BUT WITH AXIAL FREEDOM. THE TWO STOPPERS 14, 15 ARE PROVIDED IN A HOUSING 11 SURROUNDING THE ROD 8. THE HOUSING 11 IS SUPPORTED AGAINST SPRINGS 13. IT MAY BE MOVED DOWN IN RELATION TO SPINDLE 2, UNDER THE ACTION OF A HYDRAULIC PISTON 19, AGAINST THE SPRING FORCE 13. /P