B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
305/63
B62D 55/20 (2006.01) B62D 55/12 (2006.01)
Patent
CA 1096425
ABSTRACT A tread belt drive system for heavy mobile equip- ment includes an endless thread belt made up of a plurality of identical links joined together by link connecting pins. Each of the links has a ground engaging bottom and a top having a cog, or cog portion, positioned medially of the link ends, which cog has fore and aft driving surfaces. A pair of longi- tudinally extending tumbler rim and roller engaging surfaces which extend above the cog are positioned on the top of the link, one on each side of the cog. The links have fore and aft pin connections with the pin center below the engaging sur- faces in alignment with the driving surfaces. The drive sys- tem also includes rollers which support the weight of the equipment and drive and idler tumblers each having a rim and teeth. The teeth of the driving and idler tumblers are entrap- ped between the fore and aft driving surfaces of the cogs of adjacent links to drive and guide the endless belt; the rollers and the rims of the tumblers bear on and roll along the engag- ing surfaces of the links and the link connection pins follow the tumbler rotation on its pitch circle. In a preferred em- bodiment, the driving surfaces of the cogs have an involute gear rack profile; and the driving teeth of the tumbler have an involute gear profile.
308540
Gregor Robert A.
Morgan Ned L.
Bucyrus-Erie Company
Hewitt Neville S.
LandOfFree
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