Abstract: A combined pile driver, pile drawer and drilling machine comprises a carriage (1), a turntable (1A) mounted on the carriage (1), support device (2), lifting device (4) and a mast system (5) comprising two mast units (3). The support device (2) comprises a tubular support bearing (9) which is hinged to the turntable (1A) at (6A) and the lifting device (4) comprises two hydraulic cylinder (6) which are hinged to the turntable (1A) at (6B) and to a bearing sleeve (9A) at (6C). The support device (2) further comprises a mast support (10) which surrounds the bearing (9) and extends through the sleeve (9A) and can be rotated about its own axis by means of an hydraulic cylinder (11) and a coupling (11A). Each mast unit (3) is mounted on the mast support (10) by brackets (14) and comprises a guide rail (13), a mast (12) which is slidable on the guide rail (13) by an hydraulic cylinder (15) and a cradle (30) which is movable on the mast (12) by an hydraulic feed cylinder (28).

Abstract: A rotary head for a drilling machine, the rotary head comprising: lower, intermediate and upper device (1,3 and 61 or 62) for engaging a plurality of drilling tools; a mechanism (8,5) for rotating drilling tools engaged by the engaging devices at a speed which is adjustable; and flushing structure comprising a plurality of flushing apertures (25,44,11 or 52) for supplying flushing fluid to or from drilling tools engaged by the engaging devices.