DRIVE SPROCKET WHICH HAS ROTATING MEMBERS WHICH ARE ENGAGED BY DRIVE LUGS OF A TRACK

摘要

A drive mechanism includes a drive shaft (20) and a sprocket drive assembly (22). The sprocket drive assembly (22) includes a hub (24) mechanically coupled to the drive shaft (20), a first side support (32) secured to the hub (24), a second side support (36) secured to the hub (24), and a plurality of engagement members (44) each interposed between the first side support (32) and the second side support (36). Each of the plurality of engagement members (44) is rotatably secured to each of the first side support (32) and the second side support (36). The drive mechanism further includes a track assembly (99) which has a plurality of shoes (80) which are secured to one another to form a track, and a plurality of drive lugs (118) which are mounted to the plurality of shoes (80). Each of the plurality of drive lugs (118) has a first grasping notch (124) and a second grasping notch (126) defined therein. The plurality of drive lugs (118) includes a first drive lug (118) and a second drive lug (118) which are adjacent to each other. The first grasping notch (124) of the first drive lug (118) and the second grasping notch (126) of the second drive lug (118) cooperate to engage one of the plurality of engagement members (44) when the hub (24) is driven by the drive shaft (20).