An embodiment front vehicle body structure of a vehicle body is provided. The vehicle body includes an underbody and an upper body coupled to the underbody, and the front vehicle body structure includes a pair of front wheel arch members respectively disposed on both sides of a front part of the upper body according to a vehicle width direction and a front seat mount unit including a front seat crossmember extending along the vehicle width direction and coupled to each of the front wheel arch members.

An embodiment joint structure for a vehicle body is provided. The vehicle body includes an underbody and an upper body coupled to the underbody, and the joint structure includes a front bulkhead coupled to an inside of each side sill of a pair of side sills provided on both sides of the upper body, respectively, a rear bulkhead coupled to the inside of each side sill of the pair of side sills on a rear side of the front bulkhead, and a support bracket coupled to the front bulkhead and the rear bulkhead along a length direction of the vehicle body.

A lower vehicle-body structure includes: a floor cross member coupling a side sill disposed on an outer side in a vehicle width direction of a vehicle body to a floor tunnel disposed in a center in the vehicle width direction of the vehicle body, and disposed so as to be held between seat brackets in a vehicle front-rear direction; and a tunnel reinforcing member provided in the floor tunnel, wherein the tunnel reinforcing member includes a first tunnel reinforcing member disposed at a position to overlap in the vehicle front-rear direction with the floor cross member, and second tunnel reinforcing members disposed at positions to overlap in the vehicle width direction at least partly with the seat bracket, and the seat brackets are coupled to the floor cross member.

The present invention provides a vehicle body side structure in which a center pillar (pillar) which extends upward from a side sill having a hollow cross section forms a closed cross section with a pillar inner thereof and a stiffener joined to an outer side in a vehicle-width direction of the pillar inner, and the stiffener has a protruding shape which protrudes outward in the vehicle-width direction, wherein the stiffener has an insertion portion into a cross section of the side sill, and has a fragile portion above the side sill.

A structure of a purpose-built vehicle, includes a vehicle body cross member coupled to a floor panel in a lower side of the floor panel of a vehicle body, a frame including frame side members and a frame cross member and coupled to a lower side of the vehicle body, a plurality of connection brackets located between the vehicle body cross member and the frame cross member, and fastening bolts coupled to the connection brackets while penetrating the frame cross member and a battery casing configured to accommodate a high-voltage battery.

A lower vehicle-body structure includes: a floor cross member coupling a side sill disposed on an outer side in a vehicle width direction of a vehicle body to a floor tunnel disposed in a center in the vehicle width direction of the vehicle body; seat brackets disposed to have the floor cross member therebetween in a vehicle front-rear direction at both ends in the vehicle width direction of the floor cross member, and coupled to the side sill and the floor tunnel, respectively; and a floor frame extending in the vehicle front-rear direction and disposed on a floor panel. At least portions of the seat brackets are disposed at positions to overlap with the floor frame in a planar view.

An automobile body structure is provided in which a carbon fiber-reinforced plastic cabin formed of a bathtub shape includes an inverted U-shaped roll bar providing a connection between front parts of a pair of left and right side frames, and a pair of left and right roll bar-supporting bars connecting an upper portion of the roll bar to rear parts of the pair of left and right side frames. Since a rear part of a roof panel and a front part of a tailgate panel are supported on a mounting bracket provided on the roll bar-supporting bar, it is possible, by changing the fore-and-aft position of the mounting bracket, to freely set the rear end position of the roof panel and the front end position of the tailgate panel and, moreover, it is possible to strongly support the roof panel and the tailgate panel.

A motor vehicle body includes a floor structure having at least one side member, and a superstructure arranged thereon and having a hinge pillar adjoining the floor structure. A reinforcing element is provided in a transition region of floor structure and hinge pillar. A first end portion of the reinforcing element is structurally connected to the floor structure and a second end portion of the reinforcing element located opposite the first end is structurally connected to the superstructure.

A lateral section structure (10) of a vehicle body is equipped with a center pillar (14) which extends in a vertical direction and in which an outer panel (31) and an inner panel (32) are joined. An opening section (96) into which a seatbelt component (50) is inserted is formed in the inner panel. The outer panel has a lower section and an upper section. The lower section forms a lower portion of the outer panel. The upper section overlaps the lower section and extends upward. A lower end of the upper section is inclined upward or downward in a forward-rearward direction of a vehicle body along a lower end of an overlapping section in which the lower section and the upper section overlap and are joined to each other, and is disposed at a position at which the lower end of the upper section faces the opening section.

An electric vehicle frame strut tower to body structure interface bracket is disclosed. An example electric vehicle disclosed herein includes a frame, a battery pack supported by the frame, a body coupled to the frame, a strut tower coupled to the frame to support the body and absorb road surface impacts on the electric vehicle, and a strut tower interface bracket to couple the strut tower to the body.