EXPANSION CHUCKING DEVICE

摘要

The invention relates to an expansion chucking device comprising a base body (2), an expansion sleeve (4) which is arranged on an axial end of the base body (2) and which forms a central receiving element (5) for the component which is to be chucked, and a chucking ring (6) which surrounds the expansion sleeve (4) by forming an annular-shaped pressure chamber (7) therebetween and which is screwed to the base body (2). The pressure chamber (7) is filled with hydraulic means (11) and the expansion sleeve (4) can be deformed in an elastic manner in order to fix a component in the receiving element (5) wherein the chucking ring (6) is axially displaced by rotation in relation to the base body (2) and reduces the volume of the pressure chamber (7). The invention is characterised in that several slits (4b) are embodied in the expansion sleeve (4), said slits extending in an axial direction and are arranged at a distance from each other in the peripheral direction. The expansion sleeve (4) is sealed in relation to the pressure chamber (7) in order to prevent hydraulic means(11) from penetrating into the slits (4a).