The technology relates to autonomous vehicles having hitched or towed trailers for transporting cargo and other items between locations. Aspects of the technology provide a smart hitch connection between the fifth-wheel of a tractor unit and the kingpin of a trailer. This avoids requiring a person to make physical pneumatic and electrical connections between the fifth-wheel and kingpin using external hoses and cables. Instead, the necessary connections are made internally, autonomously. For instance, the fifth-wheel may provide air pressure via one or more slots arranged on a connection surface, and the trailer is configured to receive the air pressure through one or more openings on a contact surface of the kingpin. An electrical connection section of the fifth-wheel may also provide electrical signals and/or power to an electrical contact interface of the kingpin. Rotational information about relative alignment of the trailer to the tractor unit may also be provided.

An automated trailer coupling arrangement includes a receiver member fixed to a towed vehicle and including pneumatic and electrical couplers, a shuttle member including pneumatic and electrical couplers, a control arm assembly supported on a towing vehicle and including a carrier member configured to operably couple and uncouple with the shuttle member, and an actuator coupled to the carrier member configured to move the carrier member between a first position where the carrier member is coupled with the shuttle member and the shuttle member is spaced from the receiver member, and a second position where the pneumatic and electrical couplers are respectively coupled and the carrier member is uncoupled and spaced from the shuttle member, wherein the control arm is configured to move a vertical and horizontal directions as the carrier member is moved between the first and second positions.

An automated trailer coupling arrangement includes a receiver member fixed to a towed vehicle and including pneumatic and electrical couplers, a shuttle member including pneumatic and electrical couplers, a control arm assembly supported on a towing vehicle and including a carrier member configured to operably couple and uncouple with the shuttle member, and an actuator coupled to the carrier member configured to move the carrier member between a first position where the carrier member is coupled with the shuttle member and the shuttle member is spaced from the receiver member, and a second position where the pneumatic and electrical couplers are respectively coupled and the carrier member is uncoupled and spaced from the shuttle member, wherein the control arm is configured to move a vertical and horizontal directions as the carrier member is moved between the first and second positions.

Apparatuses, systems, and methods for determining and verifying operational states of fifth wheels. Certain methods for determining the operational state of the fifth wheel may include sensing, with at least one sensor, magnetic flux caused by a magnet on a movable component movable to lock the fifth wheel to a kingpin of a towed vehicle and determining an end position of the movable component based on the magnetic flux. The end position of the movable component is then compared to a threshold position and an operational state of the fifth wheel is determined based on the comparison of the end position of the movable component to the threshold position.

An underbed hitch mounting system is described. The mounting system may be utilized for towing vehicles wherein the mounting system may selectively accommodate either a fifth wheel hitch or a gooseneck hitch. The mounting system may include at least one rail capable of being connected to a vehicle frame, wherein the rail includes at least one socket. The socket may be engaged with a receiving member, wherein the receiving member may be engaged with a leg of a fifth wheel hitch. A mid rail may be connected to the rails and may include a hitch ball socket that is capable of engagement with a hitch.

A king pin coupler assembly of a fifth wheel coupling. A coupler plate has a king pin aperture therein. A king pin is positioned to extend axially through the king pin aperture of the coupler plate. The king pin has a first portion with a neck for engaging a fifth wheel of the fifth wheel coupling, the first portion extending to a first side of the coupler plate. The king pin has a second portion on a second side of the coupler plate and welded to the coupler plate. A shielding apparatus is secured to one or both of the king pin and the coupler plate. The shielding apparatus includes a cover sealed to the first side of the coupler plate. The cover extends over the first portion of the king pin to shield the first portion of the king pin during liquid immersion of the king pin coupler assembly.

A first assembly combinable to the heavy equipment and a second assembly pivotally attached to the first assembly for rotation about a first axis and configured for pivotal attachment to the vehicle for rotation about a second axis. A tow rod extending from the first assembly with a third axis extending therethrough and combinable to the heavy equipment and configured for rotation with respect to the heavy equipment about the third axis.

A first assembly combinable to the heavy equipment and a second assembly pivotally attached to the first assembly for rotation about a first axis and configured for pivotal attachment to the vehicle for rotation about a second axis. A tow rod extending from the first assembly with a third axis extending therethrough and combinable to the heavy equipment and configured for rotation with respect to the heavy equipment about the third axis.

A road tractor semi-trailer combination 1 is equipped with a system for detecting the position of a road tractor relative to a semi-trailer. This system comprises a magnet 13 which is accommodated in the center of the bottom of the kingpin and a sensor unit 11 which is fixed to the bottom of the fifth wheel 9. The sensor unit can be displaced between a resting position at a distance from the magnet where the position of the magnet cannot be detected, and an operating position at a distance from the magnet where the position of the magnet can be detected indeed. The fifth wheel is equipped with a handle for displacing a locking pawl which locks the kingpin in the fifth wheel in coupled state of the road tractor and the semi-trailer. This handle is connected via a pulling cable to the sensor unit for displacing the sensor unit to the operating position simultaneously with the displacement of the locking pawl.

An upper deck frame assembly for a trailer chassis includes a flushed floor section defining a first floor height, and a header section, with a header, forward of the flushed floor section and defining a second floor height above the first floor height. A towing assembly may be secured to the header. A reduced size header section increases usable floor space, and the towing assembly is securable to the header.