B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
B62D 55/14 (2006.01)
Patent
CA 2720821
A roller for supporting an endless track of a track laying tractor is mounted for rotation about a shaft or axle fixed between transversely spaced, parallel rails of a track support frame. The roller is constructed of mirror image halves having axially inner ends welded together, with a pair of thrust bushings being received on the shaft and respectively disposed in supporting relationship the roller halves. Each thrust bushing includes an axially outer end defined by an annular flange having an axially outwardly facing flat bearing surface. A pair of mounting brackets are respectively received on, and fixed to opposite ends of the shaft and fixed to the pair of rails of the support frame. Non-uniform edge loading of the bushings due to minor shaft deformations due to flexure of the track support frame rails is minimized by providing axially inwardly facing ends of the brackets with spherically contoured surfaces, and by locating an annular spacer between each bracket and bushing flat bearing surface, the annular spacer having outer and inner axially facing surfaces respectively shaped complimentary to the spherical contoured surface of the bracket and the flat bearing surface of the bushing.
Borden Ladner Gervais Llp
Deere & Company
LandOfFree
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