VEHICLE REAR BODY STRUCTURE

摘要

A vehicle rear body structure 10 includes a left rear frame 13 that is formed to have a closed section. The left rear frame 13 has a lower member 22 that is formed to have a thickness dimension larger than an upper member 23 thereof. The left rear frame 13 has a first soft zone 24, a second soft zone 25, and a third soft zone 26. The first to third soft zones 24, 25, and 26 are portions with lower strength. The second soft zone 25 is provided in a ring shape throughout the circumference of the left rear frame 13. The first soft zone 24 and the third soft zone 26 are arranged in a lower half part of the left rear frame 13.

主权项

1. A vehicle rear body structure comprising:
rear frames that extend in a vehicle front-rear direction and are arranged on respective left and right sides at a vehicle body rear part, each of the rear flames being composed of an upper half part and a lower half part which are attached to each other so as to form a closed area in a cross-sectional direction thereof; and a bumper beam that extends in a vehicle widthwise direction between the rear frames and bridges rear ends thereof, wherein each rear frame has a first soft zone, a second soft zone, and a third soft zone that are arranged in respective different positions spaced from one another in the vehicle front-rear direction and in that order from a vehicle front side to a vehicle rear side, each of the first soft zone, the second soft zone and the third soft zone having lower strength than other portions of said rear frame, said second soft zone is disposed between said first soft zone and said third soft zone, said second soft zone is disposed on said upper and lower half parts of said rear frame in manner that forms a ring shape extending along a circumference of said rear frame in the cross-sectional direction, and said first soft zone and said third soft zone are disposed on said lower half part of said rear frame.