A transportable machine including an elongated frame having a top end and a bottom end, a handle disposed on the top end of the frame, a base disposed on the bottom end of the frame, where the base and the frame together define a space configured to receive and support a load, and a wheel disposed on the bottom end of the frame. A track is coupled to the frame, where the track includes a roller and an endless belt configured to rotate about the roller. A motor is coupled to the roller, where the motor is operable to drive the endless belt, and a power supply provides power to the motor.

A suspension and drive system includes front and rear torsion axle assemblies. The front torsion axle assembly includes a front axle, a front shaft, and a front arm connecting the front axle to the front shaft. The rear torsion axle assembly includes a rear axle, a rear shaft, and a rear arm connecting the rear axle to the rear shaft. A center of the front torsion axle assembly and the rear torsion axle assembly together define a quadrilateral. The front axle defines a first vertex of the quadrilateral, the front shaft defines a second vertex of the quadrilateral, the rear shaft defines a third vertex of the quadrilateral, and the rear axle defines a fourth vertex of the quadrilateral. An interior angle of the quadrilateral at the fourth vertex is less than an interior angle of the quadrilateral at the second vertex.

A suspension and drive system includes front and rear torsion axle assemblies. The front torsion axle assembly includes a front axle, a front shaft, and a front arm connecting the front axle to the front shaft. The rear torsion axle assembly includes a rear axle, a rear shaft, and a rear arm connecting the rear axle to the rear shaft. A center of the front torsion axle assembly and the rear torsion axle assembly together define a quadrilateral. The front axle defines a first vertex of the quadrilateral, the front shaft defines a second vertex of the quadrilateral, the rear shaft defines a third vertex of the quadrilateral, and the rear axle defines a fourth vertex of the quadrilateral. An interior angle of the quadrilateral at the fourth vertex is less than an interior angle of the quadrilateral at the second vertex.

With an idler, a first member includes a first boss portion, a first rim portion, and a side plate. A second member includes a second boss portion, a second rim portion, and a side plate. A third member includes a third boss portion having a third axle hole portion configured to allow insertion of an axle. The third boss portion is disposed between the first boss portion and the second boss portion. A first welded portion is formed between the second boss portion and the third boss portion and connects the second and third boss portions. A second welded portion is formed between the first boss portion and the third boss portion and connects the first and third boss portions. A third welded portion is formed between the first rim portion and the second rim portion and connects the first and second rim portions.

The Reconfigurable Wheel-Track (RWT) is a novel mechanism that allows a wheel to transform into a track, and vice-versa. The wheel permits a vehicle to travel quickly over smooth and semi-rough terrain, then, on-the-fly, transform rapidly into a powered track for crossing extreme terrain. The reconfigurable wheel-track consists of several main components: an outer tire/tread, drive mechanisms for the wheel and track, support mechanisms for the outer tread when in either wheel mode or track mode, and a reconfiguration mechanism that facilitates the transformation from a wheel to a track and vice-versa. The reconfigurable wheel-track includes sensing, actuation, and controls to facilitate efficient and effective transition from wheel to track and vice-versa, and securely maintain each shape.

The Reconfigurable Wheel-Track (RWT) is a novel mechanism that allows a wheel to transform into a track, and vice-versa. The wheel permits a vehicle to travel quickly over smooth and semi-rough terrain, then, on-the-fly, transform rapidly into a powered track for crossing extreme terrain. The reconfigurable wheel-track consists of several main components: an outer tire/tread, drive mechanisms for the wheel and track, support mechanisms for the outer tread when in either wheel mode or track mode, and a reconfiguration mechanism that facilitates the transformation from a wheel to a track and vice-versa. The reconfigurable wheel-track includes sensing, actuation, and controls to facilitate efficient and effective transition from wheel to track and vice-versa, and securely maintain each shape.

The Reconfigurable Wheel-Track (RWT) is a novel mechanism that allows a wheel to transform into a track, and vice-versa. The wheel permits a vehicle to travel quickly over smooth and semi-rough terrain, then, on-the-fly, transform rapidly into a powered track for crossing extreme terrain. The reconfigurable wheel-track consists of several main components: an outer tire/tread, drive mechanisms for the wheel and track, support mechanisms for the outer tread when in either wheel mode or track mode, and a reconfiguration mechanism that facilitates the transformation from a wheel to a track and vice-versa. The reconfigurable wheel-track includes sensing, actuation, and controls to facilitate efficient and effective transition from wheel to track and vice-versa, and securely maintain each shape.

In a method of monitoring track tension in construction machinery, data on predetermined major factors for monitoring track tension are received. A machine learning algorithm is performed based on the data to determine a track tension state. Information on the track tension state is displayed.

In a method of monitoring track tension in construction machinery, data on predetermined major factors for monitoring track tension are received. A machine learning algorithm is performed based on the data to determine a track tension state. Information on the track tension state is displayed.

A track system for a vehicle, the vehicle having a drive axle, the track system comprising a drive sprocket including a hub structured to be connected to the drive axle, a plurality of teeth radially outward of the hub, a rim at least indirectly attached to the hub, the rim including: a body, a body outer surface, a recess in the rim body inward of the body outer surface, a resiliently deformable ring disposed in the recess, the ring structured and arranged with respect to the body so as to be less rigid than the body, a resiliently deformable tread extending outwardly of the rim-outer surface, the tread connected to the ring, a resiliently deformable track disposed around the drive sprocket, the track having a track-inner surface in contact with the tread.