Vehicle rear structure
A vehicle rear structure according to the present invention includes: a rear side frame disposed on each side of the rear portion of a vehicle body; and a rear cross-member coupling the rear side frames to each other. Each of the rear side frames includes a front-rear portion extending in a front-rear direction of the vehicle body and an oblique portion extending obliquely so as to be displaced gradually outward in a vehicle width direction as extending frontward from a front end of the front-rear portion, the oblique portion includes a narrowest portion at which the area of a closed cross-section is smallest, and the rear cross-member couples the narrowest portions to each other.
1. A vehicle rear structure comprising:
a rear side frame connected to a rear edge of a side sill disposed on each side of a vehicle body; and
a rear cross-member coupling the rear side frames to each other, wherein
each of the rear side frames includes a front-rear portion extending in a front-rear direction of the vehicle body and an oblique portion extending obliquely so as to gradually extend outward in a vehicle width direction and frontward in the front-rear direction of the vehicle body from a front end of the front-rear portion,
the front-rear portion and the oblique portion define a closed cross section, and the oblique portion includes a narrowest portion at which an area of the closed cross-section is smallest, and
the rear cross-member couples the narrowest portions to each other.
2. The vehicle rear structure according to claim 1 , wherein
the rear cross-member includes a front wall rising upward from a front edge of a bottom wall of the rear cross-member and a rear wall rising upward from a rear edge of the bottom wall, and
the front wall or the rear wall is disposed between the narrowest portions.
3. The vehicle rear structure according to claim 1 , wherein
the narrowest portion has a first mounting portion for a rear sub frame disposed below the rear side frames.
4. The vehicle rear structure according to claim 3 , wherein
the rear cross-member has a second mounting portion for the rear sub frame.
5. The vehicle rear structure according to claim 4 , wherein
a battery case is disposed forward of the rear cross-member,
the rear cross-member has a bracket mounting portion for a bracket through which the battery case is supported on the rear cross-member, and
the second mounting portion and the bracket mounting portion are adjacent to each other.
6. The vehicle rear structure according to claim 5 , wherein
a bulkhead is disposed inside the rear cross-member, and
the rear sub frame is attached to the bulkhead via the second mounting portion.
7. The vehicle rear structure according to claim 5 , further comprising
a gusset coupling the front-rear portion and the rear cross-member, wherein
the gusset is coupled to the rear cross-member in a range including the second mounting portion and the bracket mounting portion in the vehicle width direction.
8. The vehicle rear structure according to claim 7 , wherein
each of the rear side frames has a third mounting portion for the rear sub frame, the third mounting portion being adjacent to a coupling portion with the gusset, the coupling portion being formed on the front-rear portion.