Abstract: A joining structure of a vehicle frame that includes: a vehicle frame including a tubular first frame and a second frame, the first frame being formed in a closed cross section shape by extrusion molding of a lightweight metal, the second frame being formed in an open cross section shape of which one side is open by die-casting of a lightweight metal, and the second frame being superposed with the first frame in a state of contact therewith; a slit portion formed in the second frame, the slit portion extending along a marginal edge portion at an opening direction side of the second frame; a first welded portion structured by welding the marginal edge portion of the second frame to the first frame; and a second welded portion structured by welding a periphery edge portion of the slit portion to the first frame.

Abstract: A suspension member that includes: a rear cross member having a pair of secondary side rails; a front cross member; a right and left pair of front body mounts; and a right and left pair of side rails that are each formed in a closed cross-sectional shape having a higher ductility than a ductility of the front body mounts and the secondary side rails, extend in the extension direction of the secondary side rails, and are covered from vehicle body upper side by and joined to the front body mounts in a state in which vehicle body rear side sections of the side rails are covered from their vehicle body upper side by and joined to the secondary side rails and vehicle body front side sections of the side rails overlap front end portions of the front body mounts as seen in a plan view.

Abstract: There is provided a vehicle connecting member including: a front face portion that is connected to a crash box; a first connecting section inserted with and connected to a front end portion of a side member provided running along a vehicle front-rear direction at the vehicle front-rear direction rear side of the crash box; a second connecting section that is formed at a vehicle width direction outside of the first connecting section in a vehicle plan view, and that is connected to a lower end portion of an outrigger provided running along the vehicle front-rear direction at the vehicle width direction outside of the side member so as to extend toward a vehicle vertical direction lower side; and one or more lateral ribs that couple together the first connecting section and the second connecting section.

Abstract: A reinforcing structure of a vehicle frame member includes: ribs that integrally connect standing wall portions, that are formed at a planar portion of a vehicle frame member, to one another, and that reinforce the planar portion; portions of gradually changing thickness that are formed at connected portions of the ribs with the standing wall portions; portions of gradually changing height that are formed at the connected portions of the ribs with the standing wall portions; first curved portions that are formed at the portions of gradually changing thickness; second curved portions that are formed at the portions of gradually changing thickness; third curved portions that are formed at the portions of gradually changing height; and fourth curved portions that are formed at the portions of gradually changing height.

Abstract: A suspension member that includes: a rear cross member having a pair of secondary side rails; a front cross member; a right and left pair of front body mounts; and a right and left pair of side rails that are each formed in a closed cross-sectional shape having a higher ductility than a ductility of the front body mounts and the secondary side rails, extend in the extension direction of the secondary side rails, and are covered from vehicle body upper side by and joined to the front body mounts in a state in which vehicle body rear side sections of the side rails are covered from their vehicle body upper side by and joined to the secondary side rails and vehicle body front side sections of the side rails overlap front end portions of the front body mounts as seen in a plan view.

Abstract: A joining structure of a vehicle frame that includes: a vehicle frame including a tubular first frame and a second frame, the first frame being formed in a closed cross section shape by extrusion molding of a lightweight metal, the second frame being formed in an open cross section shape of which one side is open by die-casting of a lightweight metal, and the second frame being superposed with the first frame in a state of contact therewith; a slit portion formed in the second frame, the slit portion extending along a marginal edge portion at an opening direction side of the second frame; a first welded portion structured by welding the marginal edge portion of the second frame to the first frame; and a second welded portion structured by welding a periphery edge portion of the slit portion to the first frame.

Abstract: The suspension member includes: a rear cross member that extends along the vehicle width direction, and that includes a left and right pair of sub side rails that integrally extend from respective vehicle width direction end portions of the rear cross member toward the vehicle body front side; and a left and right pair of side rails that extend along the extension direction of the sub side rails, that each include a bent portion protruding toward the vehicle body lower side at an extension direction intermediate portion of the side rail, wherein the upper side of an end portion further toward a vehicle body rear side than the bent portion is covered by, and joined to, the respective sub side rail, and the lower side of the end portion further toward the vehicle body rear side than the bent portion is in an exposed state.

Abstract: There is provided a vehicle connecting member including: a front face portion that is connected to a crash box; a first connecting section inserted with and connected to a front end portion of a side member provided running along a vehicle front-rear direction at the vehicle front-rear direction rear side of the crash box; a second connecting section that is formed at a vehicle width direction outside of the first connecting section in a vehicle plan view, and that is connected to a lower end portion of an outrigger provided running along the vehicle front-rear direction at the vehicle width direction outside of the side member so as to extend toward a vehicle vertical direction lower side; and one or more lateral ribs that couple together the first connecting section and the second connecting section.