Vehicle front body structure
A vehicle front structure includes a pair of side rails extending in a vehicle forward-rearward direction on right and left sides in a front portion of the vehicle and a hollow bumper reinforcement extending in a vehicle right-left direction and coupled to front ends of the pair of side rails. The bumper reinforcement includes side extension parts extending outward beyond the side rails, respectively. The vehicle front structure further includes load transmission members each extending from a front face of each of the side extension part of the bumper reinforcement through the side extension part and further extending rearward and toward the inward of the vehicle. In a small overlap crash, the load transmission member transmits a collision load directly to the side rail.
1. A front body structure of a vehicle, comprising:
a pair of side frame members extending in a forward-rearward direction of the vehicle on right and left sides in a front portion of the vehicle, respectively;
a hollow bumper reinforcement extending in a right-left direction of the vehicle and coupled to front ends of the pair of side frame members, the bumper reinforcement including side extension parts extending outward beyond the pair of side frame members, respectively; and
load transmission members extending from front faces of the respective side extension parts of the bumper reinforcement through the side extension parts and further extending rearward and inward of the vehicle, wherein
the bumper reinforcement includes an upper wall, a lower wall, a front wall, and a rear wall forming a hollow quadrilateral cross section, the bumper reinforcement further including at least one reinforcing wall disposed between the upper wall and the lower wall and connecting the front wall and the rear wall, and
each of the load transmission members is disposed between two adjacent walls among the upper wall, the lower wall, and the at least one reinforcing wall of the bumper reinforcement.
2. The front body structure of a vehicle according to claim 1 , wherein
each of the load transmission members is a hollow member including an upper wall and a lower wall, the upper wall and the lower wall of the load transmission member being respectively disposed in parallel to and adjacent to corresponding ones of the adjacent walls of the bumper reinforcement.
3. The front body structure of a vehicle according to claim 2 , wherein
the bumper reinforcement and the load transmission members are made of metal, and at least the upper wall and the lower wall of each load transmission member are welded to the bumper reinforcement in the front face and a rear face of the bumper reinforcement.
4. The front body structure of a vehicle according to claim 1 , wherein
each load transmission member includes a rear end spaced from a corresponding one of the side frame members, and in a small overlap crash, the rear end of the each load transmission member comes into contact with the side frame member, so that the load transmission member transmits a load input to a corresponding one of the side extension parts of the bumper reinforcement to the side frame member.