A vehicle substructure for a motor vehicle driven at least semi-electrically including at least one chassis auxiliary frame for a rear axle chassis and a battery system arranged in a forward travel direction in front of the chassis auxiliary frame with a battery support structure for receiving at least one battery device. The battery support structure is connected to the body. A mounting carrier serves to transfer a load from the chassis auxiliary frame into the battery support structure in a crash event. The mounting carrier is suitable and configured so as to fixedly connect the chassis auxiliary frame and the battery system to one another prior to being installed in the vehicle, thereby providing a pre-mounting assembly. The mounting carrier can be downwardly disengaged from the chassis auxiliary frame and the battery system after the marriage has been established.

A subframe structure includes: right and left vehicle body side frames; a vehicle body cross-member extending in the vehicle width direction between the vehicle body side frames; a load transmission member connecting a portion of each vehicle body side frame that extends longitudinally frontward from a bent portion of the vehicle body side frame and a portion that is located laterally centrally relative to the laterally outer end portions of the vehicle body cross-member; right and left longitudinal members extending along the vehicle body side frames; and a front cross-member extending in the vehicle width direction between the longitudinal members. The front cross-member has a first attachment portion attached to each longitudinal member, an extension portion extending in the vehicle width direction from the first attachment portion, and a second attachment portion attached to the load transmission member at a laterally outer end portion of the extension portion.

A vehicle body includes a floor assembly having a center floor and a rear floor, a pair of side structures connected to both sides of the floor assembly, and a pair of side sills connected to both side edges of the floor assembly, wherein each side sill includes an inner side sill facing an interior of the vehicle body, an outer side sill facing an exterior of the vehicle body, and first and second side sill reinforcements disposed between the inner side sill and the outer side sill, and wherein a rear end portion of the first side sill reinforcement overlaps a front end portion of the second side sill reinforcement.

Vehicle comprising a bottom structure arranged at a bottom rear side of the vehicle, wherein the vehicle is an automobile for use on public roads, wherein the bottom structure: comprises at least a vortex part which is inclined upwards when seen in a direction from a front end of the vehicle to a rear end of the vehicle, wherein the vortex part covers substantially the width of the vehicle, and is adapted to, when the vehicle is moving forward, generate an bottom air vortex below the vortex part.

A vehicle body structure includes a system of connected unitized body structure components, with at least one of the system of connected unitized body structure components including a hollow portion.

A base floor part made of plastic or composite material for a replacement floor for enlarging a rear cargo space of a motor vehicle, such as a compact car or an off-road vehicle, on which a wheelchair can be stored, is described. The base floor part may be connected to the vehicle body. The base floor part may include a preformed marking at which a front end portion can be separated to enable coupling with an extension floor part.

A vehicle-body structure includes a floor panel constituting a floor of an occupant space, a center frame disposed to be higher than and away from the floor panel at a vehicle-width-direction central portion of the occupant space and extending in a front-rear direction, and connecting members each extending upward from the floor panel, having an upper portion fixed to the center frame, and connecting the center frame to the floor panel.

An electric-vehicle-body structure includes a floor panel constituting a floor of an occupant space, and a center frame disposed to be higher than and away from the floor panel at a vehicle-width-direction central portion of the occupant space and extending in a front-rear direction. A battery unit includes battery frames disposed at a lower position than the floor panel and extending in the front-rear direction. Such a positional relation is achieved in which the battery frames and the center frame overlap each other in a plan view.

A vehicle-body structure includes a first floor panel constituting a floor of an occupant space, a dash panel, a second floor panel provided on a vehicle rear side of the occupant space, a connection panel connecting a rear portion of the first floor panel and a front portion of the second floor panel, and a center frame disposed to be higher than and away from the first floor panel at a vehicle-width-direction central portion of the occupant space and extending in a front-rear direction. A front portion of the center frame is connected to the dash panel. A rear portion of the center frame is connected to the connection panel.

To decrease the retraction amount of a traveling motor at front collision. A vehicle-body structure includes a floor panel constituting a floor of an occupant space including a seat on which a passenger sits, a center frame disposed to be higher than and away from the floor panel at a vehicle-width-direction central portion of the occupant space and extending in a vehicle front-rear direction, and a connecting member extending upward from the floor panel, having an upper portion fixed to the center frame, and connecting the center frame to the floor panel. A traveling motor is arranged on a vehicle front side of the connecting member.