Abstract: In the case of a travel trailer having a battery and an axle (13) or a tandem axle, the battery (9) is designed for supplying electricity to a travel drive of a towing vehicle and/or to an optional travel drive of the travel trailer during trailer travel in road traffic, and is arranged as a flat battery (9) below a floor of the travel trailer, in a vehicle frame (1), wherein the height of the battery (9) essentially corresponds to the height of the vehicle frame (1).

Abstract: In a caravan that includes a battery and an axle, the battery is designed to supply power to a traction drive of a tractor vehicle and/or to an optional drive unit of the caravan when same is towed on the road, and the battery is mounted so as to be movable in the longitudinal direction of the caravan and can be moved by an adjustment mechanism.

Abstract: A vehicle chassis for a land vehicle, particularly for a motorhome or recreational vehicle, includes a front chassis module, particularly a traction unit, and a rear chassis module. The front chassis module is connected to the rear chassis module via at least one flange in order to form the vehicle chassis. The rear chassis module includes load-bearing components made of lightweight construction material. The rear chassis module includes at least two sub-modules; a frame module and an axle pan module that are combined to form the rear chassis module such that the frame module is connected to the front chassis module and the axle pan module is connected to the frame module.

Abstract: A self-supporting underframe for a vehicle, the vehicle, and a production method thereof. The underframe has two elongate monocoques arranged parallel and spaced apart from each other and at least 50% closed on at least four sides, wherein the monocoques each have a single-part, trough-like element having at least one lower base and two side walls extending upwards from the base. At least one cover element closes the trough-like elements over at least 50% of the longitudinal extent of the particular trough-like element. The at least one cover element of each of the two monocoques in each case includes at least one cross-strut cover element, and the cross-strut cover elements of the two monocoques are designed as a common, single-part cross-strut cover element spanning an intermediate space located between the trough-like elements of the monocoques. The cover elements are fixedly connected to the side walls of the monocoques.

Abstract: A self-supporting underframe for a vehicle, the vehicle, and a production method thereof. The underframe has two elongate monocoques arranged parallel and spaced apart from each other and at least 50% closed on at least four sides, wherein the monocoques each have a single-part, trough-like element having at least one lower base and two side walls extending upwards from the base. At least one cover element closes the trough-like elements over at least 50% of the longitudinal extent of the particular trough-like element. The at least one cover element of each of the two monocoques in each case includes at least one cross-strut cover element, and the cross-strut cover elements of the two monocoques are designed as a common, single-part cross-strut cover element spanning an intermediate space located between the trough-like elements of the monocoques. The cover elements are fixedly connected to the side walls of the monocoques.