A mechnical transmission for drive wheels, especialy for mobile work machines

摘要

The invention relates to a mechanical transmission for drive wheels, especially for mobile work machines, comprising: a sprocket (6) keyed on a drive shaft (8) rotatably supported to a frame (13); an internally-cogged crown (4) connected to a hub (2) of a drive wheel of a work machine; at least one intermediate gear wheel (5) coupled to the sprocket (6) and the crown (4) and rotatable supported by an intermediate member (9). Two gear couplings (3) and (7) are provided, each of which is equipped with own externally-activated means for command, which gear couplings (3) and (7) connect the intermediate member (9) with the frame (13) and the drive shaft (8).