Vehicle rear body structure

A vehicle rear body structure comprising:

• a rear frame extending in a front-and-rear direction of a vehicle body;
• a wheel house provided in the rear frame;
• a damper disposed on a side of a vehicle exterior of the wheel house and supporting a rear wheel;
• a rear bulkhead that is joined to the wheel house to partition a vehicle interior and a rear trunk and is gradually inclined downward to a front of the vehicle body toward the rear frame;
• and
• a damper base that is joined to the rear bulkhead through the wheel house so as to be disposed on the side of the vehicle exterior of the wheel house and is coupled to the damper, wherein
• the wheel house comprises
• a house peripheral wall that covers the rear wheel from a side of the vehicle interior and has a house corner ridge which is gradually inclined downward to a rear of the vehicle body toward the rear frame;
• and
• a house top portion that is formed on an upper end of the house peripheral wall,
• the damper base is joined to the side of the vehicle exterior of the wheel house so that a damper supporting portion is formed in a bag shape by the damper base and the wheel house,
• the damper supporting portion is coupled to the rear frame through the rear bulkhead and is coupled to the rear frame through the house corner ridge,
• the rear bulkhead and the house corner ridge are formed in an inverted V-shape in a side view such that a distance between the rear bulkhead and the house corner ridge gradually widens from the damper supporting portion to the rear frame,
• the wheel house is provided on both sides in a vehicle width direction of the rear bulkhead,
• the rear bulkhead includes
• a pair of legs that are respectively joined to the wheel houses provided on the both sides in the vehicle width direction;
• an upper cross member that couples upper ends of the pair of legs to each other;
• and
• a lower cross member that is disposed below the upper cross member and couples lower ends of the pair of legs to each other,
• the rear bulkhead is formed in an annular shape by the pair of legs, the upper cross member, and the lower cross member so that an opening is formed in the rear bulkhead,
• each leg of the pair of legs intersects with the upper cross member so that an upper corner is formed, and each leg of the pair of legs intersects with the lower cross member so that a lower corner is formed,
• each leg of the pair of legs includes
• a front plate portion that is joined to the wheel house to form a front leg wall of the leg and has a front flange protruding toward a side of the opening;
• and
• a rear plate portion that is joined to the wheel house to form an inner leg wall and a rear leg wall of the leg and has a rear flange joined to the front flange from a side of a rear of the vehicle body,
• the front flange and the rear flange are joined to each other to form a flange joint portion,
• the flange joint portion protrudes toward the opening, and
• the flange joint portion extends to the lower corner from the upper corner.