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

Claim 6:
7. 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 having a first axle and a second axle assembly having a second axle both on the first side of the frame;
a third axle assembly having a third axle and a fourth axle assembly having a fourth axle both on the second side of the frame;
a plurality of hubs each mounted to a different one of the first axle, second axle, third axle and fourth axle, wherein each of the plurality of hubs is configured to mount, one at a time, both of a wheel type tractive element and a track assembly type tractive element to the corresponding axle such that the power machine can be changed between using the wheel type tractive elements and the track assembly type tractive elements;
a plurality of anti-rotation devices each mounted directly to a different one of the first, second, third, and fourth axle assemblies, wherein each of the plurality of anti-rotation devices extends from the corresponding different one of the first, second, third, and fourth axle assemblies toward a track of a track assembly type tractive element mounted on the corresponding axle to engage and limit overall rotation of the track assembly;
a first variable displacement drive motor coupled to the first and second axles and configured to rotate the first and second axles to drive the wheel type tractive elements or track assembly type tractive elements mounted to the first and second axles;
a second variable displacement drive motor coupled to the third and fourth axles and configured to rotate the third and fourth axles to drive the wheel type tractive elements or track assembly type tractive elements mounted to the third and fourth axles; and
a control mechanism configured to control the first and second variable displacement drive motors using a first displacement control scheme when wheel type tractive elements are mounted to the axles, and to control the first and second variable displacement drive motors using a second displacement control scheme when track assembly type tractive elements are mounted to the axles, the first displacement control scheme being different than the second displacement control scheme.