Heavy vehicle for breaking up ground with retracting and steering rear wheels

摘要

A machine (1) for breaking up ground including, a frame (2) supported by at least one pair of front wheels or tracks (3, 3') and by at least one pair of rear wheels or tracks (4, 4'); a driver's cab (5) made out of said frame (2); means (6) of breaking up the ground connected to said frame (2); traction systems supported by said frame (2) for rotating one or more of said wheels or tracks (3, 3', 4, 4'). At least one rear wheel or track (4) having a horizontal axis (7) belonging to a chassis (8) integral with said frame (2) and provided with at least one first actuator (9) that works with manoeuvering systems (10) accessible from the driver's cab (5) to rotate the rear wheel or track (4) around a vertical axis (13) while turning the front wheels or tracks (3, 3') of the machine.