Device for mechanically fracturing rock, in particular rock blocks in quarries, and method for producing the wedge surfaces of the jaws

摘要

A device for mechanically fracturing blocks of rock in quarries consists of a hydraulic cylinder/piston unit (1), to the cylinder housing (2) of which a pipe (14) is coaxially fastened in a detachable manner. The pipe (14) has longitudinal slots (36, 37) at its end facing away from the cylinder housing (2). The shells (38, 39) formed by the longitudinal slots (36, 37) have wedge-shaped surfaces (34, 35) on their inside. In the pipe (14), a rod (22) is arranged so as to be longitudinally displaceable by the piston (3) of the cylinder/piston unit (1). In the region of the wedge-shaped surfaces (34, 35) of the pipe (14), the rod (22) has wedge-shaped surfaces (42, 43) corresponding with these. By longitudinally displacing the rod (22), the wedge-shaped surfaces (34, 35) or (42, 43) slide on one another, as a result of which the jaws (40, 41) of the shells (38, 39) are moved transversely by elastic widening of the shells (38, 39). The method for producing the wedge-shaped surfaces (34, 35) of the pipe (14) takes place in that, after arrangement of the longitudinal slots (36, 37), the shells (38, 39) are opened up to the wedge angle ( alpha ), after which their outsides are turned to the original round dimension of the pipe (14) in the region (33). IMAGE