A lower vehicle-body structure of a vehicle includes a first cross member disposed on an intermediate portion of a front floor panel in a vehicle front-rear direction as a bridge in a vehicle width direction; a second cross member disposed in a kick-up portion between the front floor panel and a rear floor panel as a bridge in the vehicle width direction at a position in which at least a center portion in the vehicle width direction is higher than the first cross member; and a battery unit disposed below at least the front floor panel to a rear end position of the front floor panel. A high-strength portion for the front floor panel is formed on a rear end of the front floor panel on a lower end portion of the kick-up portion, and is coupled to both of a pair of left and right side sills.

A lower vehicle-body structure of an electric vehicle includes a bending facilitating portion located outward of a bent portion of a kick-up and bends as a breakage starter in a lateral collision, earlier than the bent portion, to reduce the amount of projection from the bending facilitating portion toward an outer side and reduce the likelihood of interference with a battery. Each of left and right side portions in a vehicle width direction of a kick-up is bent downward from a position inward of a rear side frame toward a side sill and connected to the side sill. A bending facilitating portion that facilitates bending under a lateral-collision load is formed outward of a bent portion of the kick-up and an outer side portion of the battery, and either inward of an inner end of the rear side frame or at substantially the same position as the inner end.

The rear structure for vehicles includes: a rear floor; and a pair of oblique members coupled to a lower surface of the rear floor and configured to be symmetrical with each other about a longitudinal centerline of the rear floor, each oblique member of the pair of oblique members extending from a first side and a second side, respectively, of the rear floor to a rear portion of the rear floor.

An embodiment rear floor side member assembly includes a rear side member including a rear inner portion disposed toward an inside of a vehicle body, a rear upper portion curved toward an outside of the vehicle body from the rear inner portion, and a rear lower portion curved from the rear inner portion toward the outside of the vehicle body, a reinforcement mounting portion formed on the rear lower portion, a rear side member reinforcement mounted on the reinforcement mounting portion, and a rear spring seat assembly mounted at a bottom part of the rear side member reinforcement.

Provided is a rear vehicle-body structure of a vehicle, capable of reducing vibrations transmitted from a rear wheel to a floor panel, while ensuring required performance for rear side frames and a cross member. The rear vehicle-body structure comprises a symmetric pair of frame members extending in a vehicle longitudinal direction along respective lateral sides of a rear of a vehicle body of the vehicle, and a rear-side rear cross member bridging the symmetric pair of frame members in a vehicle width direction, wherein an attachment portion between each of the frame members and the rear-side rear cross member provided with rigidity difference generation part to generate a rigidity difference between the frame member and the rear-side rear cross member.

An embodiment rear vehicle body structure of a vehicle including an underbody and an upper body coupled to the underbody includes a reinforcing member coupled to an upper surface of a rear floor panel provided on the rear side of the upper body and connected to both chassis frames of the underbody through the rear floor panel.

A vehicle-body structure for suppressing deformation of a lift gate opening is provided. Embodiments include a vehicle having a rear annular framework formed from a cross member, side braces, connecting members, and a rear header; a rear suspension on lower surfaces of side pillars in the same position as the cross member in a vehicle front-rear direction; and wheel well inner portions on the vehicle rear side with respect to the cross member, each having an upper end having a damper supporting portion for mounting a suspension damper. The side braces each connect a place near the cross member and a place near the damper supporting portion to each other in a vehicle up-down direction; and the connecting members each connect a place near each end portion of the rear header in a vehicle width direction and the place near the damper supporting portion to each other.

A vehicle body structure includes: a subframe arranged in front of an occupant compartment; a subframe rear base arranged in a width direction of a vehicle on a lower surface of the occupant compartment; a floor frame arranged in a longitudinal direction of the vehicle on the lower surface of the occupant compartment; a subframe mount part placed at a portion where the subframe rear base overlaps with the floor frame, to support the subframe; a mounting seat formed along a horizontal plane; a fastener to fix the subframe to the mounting seat; and a reinforcing member placed to overlap with the mounting seat. The reinforcing member includes a flange, which is continuous to surround a periphery of the fastener and is arranged in a vertical direction of the vehicle, at a portion thereof closer to the subframe, and outer in the width direction, than the fastener.

A vehicle body combination structure includes a center floor panel extending from a lower portion of a vehicle body along a longitudinal direction of the vehicle body, and a rear floor panel disposed at a rear of the vehicle body and connected to the center floor panel, wherein one end surface of the center floor panel and one end surface of the rear floor panel are vertically overlapped to form an overlap region, and wherein the rear floor panel and the center floor panel form a wheel base of the vehicle body.

An electric vehicle may include a body; a spare tire disposed in a rear portion of the body; and a brace fixed to the body, extending along a vehicle longitudinal direction, and supporting the spare tire from below. The brace may include a front end fixed to the body, a rear end fixed to the body at a position rearward of the front end, and a bent portion located between the front end and the rear end. The bent portion of the brace is located above a straight line extending between the front end and the rear end of the brace.