car body structure

Abstract

In the vehicle body structure, the front ends of a pair of left and right rear frames (12) made of hot stamping materials are connected to the rear ends of a pair of left and right side beams (11) made of high tension materials. The rear frame is composed of an inclined portion (14) and a horizontal portion (15), wherein the inclined portion inclines toward the inside in the vehicle width direction as it moves toward the rear; the horizontal portion becomes approximately horizontal from the rear end of the inclined portion as it moves toward the rear The rear part of the side member has a first widening part (11a), and the first widening part (11a) is widened toward the inner side of the vehicle width direction through the bending part (11b), and the front part of the inclined part of the rear frame has The second widening part (12a), the second widening part widens toward the outside in the vehicle width direction, the rear end of the first widening part is connected to the front end of the second widening part, and the vehicle width direction of the first widening part The inner wall and the inner wall in the vehicle width direction of the inclined part are continuous in a straight line when viewed from above. Therefore, the rear frame is made of a hot stamped material, which can reduce weight while ensuring strength. Not only that, it can also effectively absorb rear surface impacts the collision energy.

Description

technical field [0001] The present invention relates to an automobile body structure in which the front ends of a pair of left and right rear frames made of a hot stamp material are connected to the front ends of a pair of left and right side members made of a high-tensile material. rear end. Background technique [0002] The following Patent Document 1 discloses a structure in which the thickness of the upper half of the rear frame made of a hot stamping material is set to be larger than the thickness of the lower half, and the rear frame is spaced at predetermined intervals in the front-rear direction. A first softening zone, a second softening zone, and a third softening zone are formed at intervals, and according to this, when a collision load of a rear surface collision is input, the rear frame is crushed into a zigzag shape to absorb collision energy. [0003] In addition, the following Patent Document 2 discloses a structure in which a rear frame made of a hot stampi...

AI Technical Summary

Problems solved by technology

[0009] However, the structures described in Patent Document 1 and Patent Document 2 have a problem of increased manufacturing cost due to the need to form a softened zone on a part of the rear frame made of a hot stamped molding material.

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