Suzuki Motor Corporation

Norio Nishida

Takayuki Souma

Masahiro Asou

A lower structure of a vehicle body rear part includes a spare tire housing formed on a rear floor, a rear cross member disposed in front of the spare tire housing to connect side frames, and a hook reinforcing member disposed in the center in the vehicle width direction on the lower surface of the spare tire housing and extending in the vehicle longitudinal direction. The front end portion of the hook reinforcing member is connected to the rear cross member, and the rear end portion thereof extends to the rear end portion of the rear floor. The side frame at the vehicle rear of the rear cross member is divided into a frame front part and a frame rear part in the vehicle longitudinal direction, and the hook reinforcing member is divided into a reinforcing member front part and a reinforcing member rear part in the vehicle longitudinal direction. The frame front part has a rigidity higher than that of the frame rear part, and the reinforcing member rear part has a rigidity higher than that of the reinforcing member front part, and the two division positions coincide with each other in the longitudinal direction.

Lower structure of vehicle body rear part

A lower structure of a vehicle body rear part, when receiving a load from a rear side of the vehicle, prevents deformation of a spare tire housing toward a front side of the vehicle and displacement of the front end of a spare tire toward the front side of the vehicle, and also facilitates the tipping up of a rear portion of the spare tire. In particular, a lower structure of a vehicle body rear parthas a spare tire housingformed in a rear floorof the vehicle body rear parta rear cross memberwhich joins paired side framesarranged respectively on a left side and a right side in a vehicle width direction, and which is provided at a location frontward of the spare tire housingand a hook reinforcementfor a tow hook, extending in a vehicle front and rear direction and arranged at a center, in the vehicle width direction, of a bottom surface of the spare tire housing, wherein a front end of the hook reinforcementis attached to the rear cross member, the hook reinforcementforms a closed cross section in cooperation with the rear floorand is formed such that the closed cross section is larger on a rear side than on a front side, and the hook reinforcementis divided into a reinforcement front portionand a reinforcement rear portion(FIG.).

A lower structure of a vehicle body rear portion, includes: a spare tire housing formed in a rear floor; a cross member joining paired side frames, and being provided at a location frontward of the housing; a reinforcement for a hook, being arranged at a center of the housing; and a bumper member provided at a rear end of the vehicle body, in which a front side of the reinforcement is attached to the cross member, the reinforcement forms a closed cross section so that the closed cross section is larger at a rear side than at a front side, the reinforcement includes front and rear portions obtained by dividing the reinforcement at a location corresponding to a center of a spare tire, and an upper side of a rear end of the rear portion is arranged below the bumper member and overlaps with the bumper member (FIG.).

Lower structure of vehicle body rear portion

A lower structure of a vehicle body rear part includes a spare tire housing formed on a rear floor, a rear cross member disposed in front of the spare tire housing to connect side frames, and a hook reinforcing member extending in the vehicle longitudinal direction. The side frame at the vehicle rear of the rear cross member is divided into a frame front part and a frame rear part in the vehicle longitudinal direction, and the hook reinforcing member is divided into a reinforcing member front part and a reinforcing member rear part in the vehicle longitudinal direction. The lower structure is configured so that when a load F is applied from the vehicle rear to a vehicle body rear part, the side frame is deformed so as to be bent in an upward convex shape at a division position of the frame front part and the frame rear part, and also the rear floor and the hook reinforcing member are deformed so as to be bent in a downward convex shape at a division position of the reinforcing member front part and the reinforcing member rear part.

Growing community of inventors

Hamamatsu, Japan

Norio Nishida