An upper coupler for a semi-trailer has a generally planar bottom plate. A kingpin attaches thereto to couple with a fifth wheel of a tractor. A reinforcement member extends across a width of the bottom plate to reduce bending of the bottom plate as it rests on the fifth wheel of the tractor. Along the reinforcement member's length, the reinforcement member has varying second moments of area taken in cross sections perpendicular to the reinforcement member's length.

A method for providing wind alerts to a driver includes detecting, with one or more towable item sensors, that a towable item has been coupled to a hitch of a vehicle, detecting a wind condition with one or more wind sensors in response to detecting that the towable item has been coupled to the hitch, and outputting, with one or more output devices, an alert indicative of a high wind scenario when the wind condition is above a wind threshold.

A tailgate deactivation system. A switch includes two terminals configured to be electrically coupled to a tailgate power circuit that supplies power to at least a portion of a tailgate of a vehicle, and an actuator configured to electrically couple the two terminals in an on state to allow power to flow in the tailgate power circuit, and to electrically decouple the two terminals in an off state to inhibit power from flowing in the tailgate power circuit.

Disclosed is a utility trailer assembly capable of transitioning between a towing position and a utility position. The tow position allows for efficient transportation of the utility trailer assembly to and from various locations. In the utility position, the utility trailer assembly provides access to a plurality of storage and multi-use areas and compartments.

A cover plate assembly for a vehicle, characterized in that it includes:a cover plate provided with a flat plate-like main body of the cover plate; anda counter-part provided with a plate-like main body of the counter-part, the counter-part main body having a through-hole matching with the shape of the cover plate main body, and two guide plates projecting in the through-hole area and supporting the cover plate main body thereunder; wherein the cover plate assembly is in drawer structure, the cover plate being configured to be assembled to the counter-part by sliding along the guide plates. The cover plate assembly in drawer structure is simply structured, low in cost and easy to operate.

The invention relates to a trailer coupling for a motor vehicle, wherein the trailer coupling has a coupling arm, on the free end region of which a ball neck is formed, on which a coupling ball is arranged for attaching a trailer or coupling a load carrier to the motor vehicle. The coupling ball is spherical on the side thereof facing away from the ball neck and has a spherical segment plane on the side thereof facing the ball neck. Between the spherical segment plane and a portion of the ball neck which has a smaller outer circumference than the spherical segment plane there is arranged a throat portion having a transition contour extending in a concave manner between the ball neck and the spherical segment. The transition contour transitions with a coupling ball transition region into an external contour of the coupling ball, in particular into the spherical segment plane, and transitions with a ball neck transition region into an outer surface of the ball neck. According to the invention, the transition contour has a curved configuration having a non-constant radius.

The invention relates to a trailer coupling for a motor vehicle, wherein the trailer coupling has a coupling arm, on the free end region of which a ball neck is formed, on which a coupling ball is arranged for attaching a trailer or coupling a load carrier to the motor vehicle. The coupling ball is spherical on the side thereof facing away from the ball neck and has a spherical segment plane on the side thereof facing the ball neck. Between the spherical segment plane and a portion of the ball neck which has a smaller outer circumference than the spherical segment plane there is arranged a throat portion having a transition contour extending in a concave manner between the ball neck and the spherical segment. The transition contour transitions with a coupling ball transition region into an external contour of the coupling ball, in particular into the spherical segment plane, and transitions with a ball neck transition region into an outer surface of the ball neck. According to the invention, the transition contour has a curved configuration having a non-constant radius.

The disclosure provides a vehicle body rear structure, which can reduce damage to the vehicle during a collision from the rear. The vehicle body rear structure includes a chassis rear, a hook reinforcement part fixed to a lower surface of the chassis rear; and a hook fixed on a back side of the chassis rear through the hook reinforcement part, in which the hook reinforcement part includes a plurality of part members independent from each other, the plurality of part members are connected in series and joined in a front-back direction of the vehicle to form a joint boundary part, and the joint boundary part is disposed with a weakened part on a side close to the chassis rear.

A trailer coupling for a motor vehicle comprises a coupling arm, on the free end region of which a ball neck is formed, on which a coupling ball is arranged. The coupling ball is spherical on the side facing away from the ball neck and has a spherical segment plane on the side facing the ball neck. Between the spherical segment plane and a portion of the ball neck has a smaller outer circumference than the spherical segment plane there is arranged a throat portion having a transition contour extending in a concave manner between the ball neck and the spherical segment. The transition contour transitions with a coupling ball transition region into an external contour of the coupling ball and transitions with a ball neck transition region into an outer surface of the ball neck. The transition contour has a curved configuration having a non-constant radius.

A towing hook attachment structure includes: a towing hook; a bumper reinforcement having: a first wall extending in a vehicle width direction, a wall surface of the first wall facing the vehicle cabin; and an second wall and a third wall respectively extending to the vehicle cabin side from an upper end and a lower end of the first wall; and a nut member fastening the towing hook to the bumper reinforcement. The first, second and third walls are respectively provided with a first, second and third holes. The nut member is fixed to the bumper reinforcement while extending in a vehicle height direction and being inserted in the second hole and the third hole. A tip of the towing hook is inserted in the bumper reinforcement through the through hole and is fastened to the nut member.