US 11,724,757 B2
Roller frame assembly in ground-engaging track system having anti-backbending rollers and method
Gennaro Suanno, Peoria, IL (US); Benoit Abello, Dunlap, IL (US); and Michael James Darges, Raleigh, NC (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Oct. 29, 2020, as Appl. No. 17/84,162.
Prior Publication US 2022/0135155 A1, May 5, 2022
Int. Cl. B62D 55/14 (2006.01); B62D 55/06 (2006.01); B62D 55/20 (2006.01); B62D 55/30 (2006.01); B62D 55/21 (2006.01)
CPC B62D 55/14 (2013.01) [B62D 55/06 (2013.01); B62D 55/202 (2013.01); B62D 55/21 (2013.01); B62D 55/30 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A ground-engaging track system comprising:
a track roller frame including a front frame end and a back frame end;
an idler recoil assembly mounted to the track roller frame;
an idler supported by the idler recoil assembly at the front frame end, the idler including an idler tread surface extending circumferentially around an idler axis and being movable in fore-aft directions between a back stop position, and a forward position;
an inboard anti-backbending roller supported by the track roller frame;
an outboard anti-backbending roller supported by the track roller frame; and
an idler space is defined between the inboard anti-backbending roller and the outboard anti-backbending roller, and the idler tread surface is within the idler space at the forward position and at the back stop position of the idler;
a plurality of standard track rollers supported by the track roller frame and distributed longitudinally along the track roller frame back of the inboard anti-backbending roller and the outboard anti-backbending roller; and
wherein each of the inboard anti-backbending roller and the outboard anti-backbending roller is configured to contact only one of an inboard track chain and an outboard track chain in a track coupled to the track roller frame, and each of the plurality of standard rollers is configured to simultaneously contact both of an inboard track chain and an outboard track chain in a track coupled to the track roller frame.