A conveyance device capable of conveying or pulling a cart having multiple wheels at a bottom portion thereof, includes a main body configured to travel, an engagement member provided in the main body and configured to engage at a predetermined position of the cart, a camera configured to capture an image of the cart, a height detection section configured to process the image of the camera to detect a height of the predetermined position of the cart, and a control section configured to cause the engagement member to engage at the predetermined position of the cart based on the height of the predetermined position of the cart detected by the height detection section.

A conveyance device capable of conveying or pulling a cart having multiple wheels at a bottom portion thereof, includes a main body configured to travel, an engagement member provided in the main body and configured to engage at a predetermined position of the cart, a camera configured to capture an image of the cart, a height detection section configured to process the image of the camera to detect a height of the predetermined position of the cart, and a control section configured to cause the engagement member to engage at the predetermined position of the cart based on the height of the predetermined position of the cart detected by the height detection section.

A towbarless tractor for towing an airplane having a nose landing gear includes a chassis, a body supported on the chassis, and a capture system. The capture system includes a lift body coupled to at least one of the body or the chassis, a cradle coupled to the lift body, and a side-shift actuator configured to selectively move the cradle along a lateral direction relative to the body.

A towbarless tractor for towing an airplane having a nose landing gear includes a chassis, a body supported on the chassis, and a capture system. The capture system includes a lift body coupled to at least one of the body or the chassis, a cradle coupled to the lift body, and a side-shift actuator configured to selectively move the cradle along a lateral direction relative to the body.

A tractor unit for transporting an elongated load includes a body that is supported, driven and steered by a wheel set comprising at least three ground-engaging wheels. At least two of the wheels are steerable and can transform between an aligned mode and a carousel mode. In aligned mode, the wheels are steerable and aligned with one another in a neutral steering position. In carousel mode, the wheels are oriented with their axes of rotation intersecting at a substantially common vertical axis within the the tractor unit body, so when the wheels are driven the tractor unit spins about this vertical axis. A load engagement mechanism is mounted pivotally on the tractor unit body about the vertical axis to allow counter rotation in an equal and opposite amount to the rotation of the tractor unit body in carousel mode, keeping the load fixed relative to the ground as the tractor unit spins.

A tractor unit for transporting an elongated load includes a body that is supported, driven and steered by a wheel set comprising at least three ground-engaging wheels. At least two of the wheels are steerable and can transform between an aligned mode and a carousel mode. In aligned mode, the wheels are steerable and aligned with one another in a neutral steering position. In carousel mode, the wheels are oriented with their axes of rotation intersecting at a substantially common vertical axis within the the tractor unit body, so when the wheels are driven the tractor unit spins about this vertical axis. A load engagement mechanism is mounted pivotally on the tractor unit body about the vertical axis to allow counter rotation in an equal and opposite amount to the rotation of the tractor unit body in carousel mode, keeping the load fixed relative to the ground as the tractor unit spins.