Patent ID: 11885100
Assignee: DOOSAN BOBCAT NORTH AMERICA, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC B  E

Claim 0:
1. A power machine comprising:
a frame having first and second opposing sides, each extending in a direction from a front of the power machine to a rear of the power machine;
a cab mounted on the frame;
a lift arm assembly pivotally coupled to the frame rearward of at least a portion of the cab and extending forward of the frame;
a first axle assembly and a second axle assembly each having an axle tube with an axle positioned therein and each disposed on the first side of the frame;
a first track assembly operably coupled to the first axle and a second track assembly operably coupled to the second axle on the first side of the frame;
a first drive motor operably coupled to each of the first and second axles and configured to rotate the first and second axles to drive the first and second track assemblies;
a third axle assembly and a fourth axle assembly each having an axle tube with an axle positioned therein and each disposed on the second side of the frame;
a third track assembly operably coupled to the third axle and a fourth track assembly operably coupled to the fourth axle on the second side of the frame;
a second drive motor operably coupled to each of the third and fourth axles and configured to rotate the third and fourth axles to drive the third and fourth track assemblies;
wherein each of the first track assembly, the second track assembly, the third track assembly and the fourth track assembly comprises:
a track frame providing an axle interface configured to engage and be attached to a corresponding one of the axles;
a track supported by the track frame;
a sprocket configured to drive the track around the track frame; and
an idler configured to tension the track on the track frame; and

wherein the power machine further comprises a plurality of anti-rotation devices each having a stop positioned to engage a different one of the first track frame, second track frame, third frame, and fourth frame, wherein the stop of each of the plurality of anti-rotation devices is fixed directly to and extends from a corresponding one of the first axle assembly, the second axle assembly, the third axle assembly and the fourth axle assembly, the stop of each of the plurality of anti-rotation devices extending toward the track of a corresponding track assembly mounted on the corresponding axle to engage the corresponding track assembly such that the corresponding track assembly is allowed to rotate until engagement with the corresponding stop.