Patent ID: 8091941

Claim:
A lower structure of a vehicle body rear part, comprising: a spare tire housing formed on a rear floor in the vehicle body rear part, the spare tire housing having a lower surface; a side frame comprising a right side frame disposed on a right side of the rear floor and a left side frame disposed on a left side of the rear floor, each of the right side and left side frames extending in a vehicle longitudinal direction; a rear cross member disposed in front of the spare tire housing and extending in a vehicle width direction to connect the right side frame and the left side frame of the vehicle body rear part, the right side frame and the left side frame respectively extending rearwardly of the rear cross member; and a hook reinforcing member for a traction hook, the hook reinforcing member extending in the vehicle longitudinal direction and being disposed in the center of the lower surface of the spare tire housing with respect to the vehicle width direction, wherein the side frame defines a division position at which each of the right side and left side frames is divided into a frame front part and a frame rear part, and wherein the hook reinforcing member defines a division position at which the hook reinforcing member is divided into a reinforcing member front part and a reinforcing member rear part, so that when a load is applied from the vehicle rear to the vehicle body rear part, the side frame is deformed so as to be bent in an upward convex shape at said division position of the frame front part and frame rear part, and the rear floor and the hook reinforcing member are deformed so as to be bent in a downward convex shape at said division position of the reinforcing member front part and the reinforcing member rear part.