The present invention relates to an idler arrangement (80) for maintaining the desired tension in an endless track (34), said endless track (34) is part of a track assembly (30) comprising a track support beam (31), track road wheels (32) and at least one sprocket (33) arranged to drive the endless track (34) arranged around the track road wheels (32) and the sprocket (33), said idler arrangement (80) comprising: an idler wheel (35); an idler wheel support (81) fitted to the track support beam (31) and configured such that the idler wheel is movably arranged in relation to the support beam; a control unit (70); idler wheel position adjusting means operated by the control unit and arranged to position the idler wheel (35) in a desired position: and means for determine a requested torque to be applied by the sprocket and forwarding the determined information to the control unit, wherein the control unit is configured to operate the idler wheel position adjusting means to maintain, or adjust, the position of the idler wheel (35), based on a requested torque applied by the sprocket (33), to maintain the desired tension in the endless track (34). The invention furthermore relates to a method for operating the idler arrangement (80).

A power machine configured as a mini-loader includes a mini-loader frame defining a front end opposite a rear end and a first side opposite a second side, at least one first-side motor supported by the first side of the frame, at least one second-side motor supported by the second side of the frame, and four endless track pods. The four endless track pods include a first endless track pod and a second endless track pod supported by the first side of the frame, and a third endless track pod and a fourth endless track pod supported by the second side of the frame. The endless tracks of the first and second endless track pods are powered by the at least one first-side motor and the endless tracks of the third and fourth endless track pods are powered by the at least one second-side motor to propel the power machine.

A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have height adjustable actuators connecting the frame to the tracks. Each actuator may have a cylinder attached to the frame, a piston slidably disposed within the cylinder, and a rod connected at a first end to the piston and connected to a track at a second end. The milling machine may have a tank storing hydraulic fluid and a fluid conduit connecting the tank to the cylinder. The milling machine may have a control valve selectively controlling a flow rate of the hydraulic fluid in the fluid conduit. The milling machine may also have a controller that determines a height of the frame relative to the ground surface based on the flow rate.

A track system for a rubber tracked work vehicle comprises temperature sensor and an antenna attached to a track wheel. The antenna is connected to the temperature sensor to transmit to a receiver a temperature signal generated by the temperature sensor. A work vehicle comprising the track system and a temperature measuring method are also disclosed.

A swing leg assembly, coupled to a paving machine for spreading, leveling and finishing concrete, includes a pivotable swing leg coupled to the paving machine. The swing leg may pivot between multiple angular orientations relative to the paving machine. A jacking column is coupled to the swing leg, and a crawler track is coupled to the jacking column. A slew drive coupled to the jacking column and crawler track rotates the crawler track relative to the jacking column between multiple angular orientations. A processor using sensors determines the angular positions of the swing leg and crawler track, and in response to determining a change in angular orientation of the swing leg controls the slew drive to cause the crawler track to rotate relative to the jacking column.

A swing leg assembly, coupled to a paving machine for spreading, leveling and finishing concrete, includes a pivotable swing leg coupled to the paving machine. The swing leg may pivot between multiple angular orientations relative to the paving machine. A jacking column is coupled to the swing leg, and a crawler track is coupled to the jacking column. A slew drive coupled to the jacking column and crawler track rotates the crawler track relative to the jacking column between multiple angular orientations. A processor using sensors determines the angular positions of the swing leg and crawler track, and in response to determining a change in angular orientation of the swing leg controls the slew drive to cause the crawler track to rotate relative to the jacking column.

A track system connectable to an axle of a vehicle has a track engaging assembly and an endless track. The track engaging assembly includes a frame, a drive wheel, front and rear idler wheel assemblies, a bogie assembly and a plurality of support wheel assemblies which includes leading, intermediate and trailing wheel assemblies that respectively apply leading, intermediate and trailing ground forces to a ground surface. A sum of the leading, intermediate and trailing ground forces defines a total ground force. The track system has an initial position wherein the total ground force is concentrated at the intermediate ground force, when the track system is at rest on a hard and flat level ground surface. In response to the bogie assembly pivoting about the bogie assembly axis, the total ground force is distributed between the intermediate ground force and at least one of the leading and trailing ground forces.

A cargo transport system is provided that has an ability to move cargo in an autonomous or semi-autonomous manner, using a compact lift vehicle capable of lifting relatively heavy objects. The system includes a cargo loading system, a sensor suite coupled with a controller, dunnage detection, cross-decking capability, cargo stacking capability, autonomous navigation, tip detection and prevention, or any combinations thereof. The system may include a fork assembly coupled with a mast and movable in a vertical direction relative to the mast. Further, the mast may be coupled with a platform or deck and movable in a horizontal direction relative to the platform, to allow the fork assembly to be lowered below a top plane of the platform when the mast is at a forward location relative to the platform. The controller and sensor suite and may provide for autonomous or semi-autonomous control and movement of the cargo transport system.

Methods and systems for attaching and detaching an item satchel from an autonomous delivery unit. An attachment system includes an attachment system frame, and a satchel comprising a plurality of external pins. The attachment system also includes a plurality of hooks, mechanically attached to the frame, each hook including a first engagement surface and a second engagement surface, one or more electric actuators, mechanically attached to the frame, and mechanically connected to the plurality of hooks. Each of the first engagement surfaces engage a corresponding pin of the plurality of external pins at a first position between the horizontal and vertical positions, and each of the second engagement surfaces engage the corresponding pin of the plurality of external pins at the vertical position to secure an item satchel to an autonomous delivery unit.

Methods and systems for attaching and detaching an item satchel from an autonomous delivery unit. An attachment system includes an attachment system frame, and a satchel comprising a plurality of external pins. The attachment system also includes a plurality of hooks, mechanically attached to the frame, each hook including a first engagement surface and a second engagement surface, one or more electric actuators, mechanically attached to the frame, and mechanically connected to the plurality of hooks. Each of the first engagement surfaces engage a corresponding pin of the plurality of external pins at a first position between the horizontal and vertical positions, and each of the second engagement surfaces engage the corresponding pin of the plurality of external pins at the vertical position to secure an item satchel to an autonomous delivery unit.