KR0125694Y1 - Reinforcement structure of sides of rear body for an automobile - Google Patents

Abstract

The present invention relates to a side reinforcement structure of a rear body for automobiles, in order to prevent damage to the fuel tank during side impact, the side frame 7 is extended to both sides of the lower frame 5 and the side frame A horizontal member 3 provided with a reinforcing plate 9 having a predetermined shape between the seven and a reinforcing pipe 10, 12 having a pipe shape in the longitudinal direction at a predetermined position of the reinforcing plate 9. ) Is mounted on the area adjacent to the fuel tank (4) located on the bottom of the floor panel (1) of the rear body of the car, thereby improving the lateral rigidity of the rear body to damage the fuel tank (4) in the event of a side collision of the vehicle. It is prevented from becoming.

Description

Side reinforcement structure of car rear body

1 is a schematic perspective view of a rear body according to the present invention,

2 (a) and 2 (b) are cross-sectional views taken along line A-A showing an embodiment according to FIG. 1,

3 (a), (b) is a perspective view of the reinforcing pipe according to FIG.

4 is a cross-sectional view of the horizontal member according to the prior art.

* Explanation of symbols for main parts of the drawings

1: Rear floor panel 2,3: Horizontal member

4 fuel tank 5 lower frame

6,8 flange portion 7: side frame

9: reinforcement plate 10,12: reinforcement pipe

11: home

The present invention relates to a reinforcement structure of a rear body of an automobile. In particular, the rear body of an automobile is designed to effectively absorb the impact energy in the event of a side collision of the vehicle to reinforce the side rigidity of the vehicle and to prevent the fuel tank from being damaged. The side reinforcement structure.

Automobile rear body is connected to the rear frame and rear bumper to disperse the impact energy generated by the rear vehicle and the collision, and also to protect the body by improving the lateral stiffness and lateral strength even in the event of side collision. A plurality of horizontal members are installed by welding, rivet joints, etc., particularly in a vehicle in which a fuel tank is installed between the third horizontal member and the fourth horizontal member. If the member does not absorb the side impact energy effectively, the fuel tank may be damaged and the vehicle may be fired, resulting in a serious accident.

By the way, in the case of the second horizontal member, as shown in FIG. 4, the side frame 41 is integrally bent on both sides of the lower frame 40 by a plate material having a predetermined thickness, and the side frame 41. The horizontal member 43 is bent horizontally when receiving a large impact energy instantaneously due to the relatively weak rigidity of each bent portion of the reinforcing member 42, the structure is attached horizontally between the Since the deformation occurs in the horizontal member 43 itself, as a result, it is impossible to prevent leakage of oil due to damage of the fuel tank 4, and of course, when manufacturing the horizontal member 43, a multi-step process is inevitably required. Therefore, there was a drawback that the production cost would increase.

Therefore, the present invention was devised to solve the above drawbacks, and the reinforcement was added to minimize the deformation of the horizontal member, thereby improving the reinforcing effect so that the fuel tank could be prevented from being damaged during the side collision of the vehicle body. It is an object of the present invention to provide a side reinforcement structure of an automotive rear body.

The present invention for achieving the above object is formed by extending both sides of the lower frame and the side frame is bent outwardly integrally integrally facing each other, the reinforcement plate is bent to form a substantially self-shaped between the side frame The member is provided, and a reinforcing pipe having a pipe shape in the longitudinal direction is fixedly attached to a predetermined position of the reinforcing plate.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view of a rear body according to the present invention, Figure 2 (a), (b) is a cross-sectional view of the AA line showing an embodiment according to Figure 1, respectively, the rear floor panel bent to a predetermined shape ( The third horizontal member 2 and the fourth horizontal member 3 are welded to the lower predetermined position of 1), respectively, and the fuel tank 4 is interposed between the third horizontal member 2 and the fourth horizontal member 3. Is mounted.

Wherein the fourth horizontal member 3 is made of a side frame (7) having a flange portion 6 bent at a predetermined angle at both ends of the lower frame (5) as shown in FIG. A reinforcing plate 9 having a predetermined flange portion 8 integrally formed at both ends is attached to the edges of the reinforcing plate 9 while being bent in a substantially U shape between the side frames 7. The reinforcement pipe 10 which has a pipe shape along the longitudinal direction is attached.

In addition, as another embodiment of the present invention, as shown in FIG. 2 (b), the reinforcing pipe 10 is longitudinally connected to one of the side frames 7 and the lower frame 5 of the fourth horizontal member 3. ) Can be attached directly.

Meanwhile, as another embodiment according to the present invention, as shown in FIG. 3 (b), a reinforcement pipe 12 having a plurality of grooves 11 having a relatively small outer diameter on the outer circumference may be used. The reinforcement pipe 12 may also be welded to the edge of the reinforcement plate 9 in the same manner as the above-described structure.

Therefore, the side reinforcement structure of the rear body for a vehicle according to the present invention is to absorb the impact energy applied to the rear body in the side collision of the vehicle in the reinforcement plate 9 and the reinforcement pipe 10 in double, horizontal member ( 3) It can prevent the phenomenon that the body itself does not effectively respond to the impact energy, twisting or bending, and in the case of the reinforcement pipe 12, a large impact energy such that the reinforcement pipe 12 is bent is transmitted in the axial direction. When the plurality of grooves 11 having a relatively small outer diameter are pressed together and folded like wrinkles, the reinforcement pipe 12 and the horizontal member 3 can be prevented from being deformed as a whole.

As described above, according to the side reinforcement structure of the rear body for automobiles of the present invention, as the reinforcement pipes 10 and 12 support the horizontal members 3 in the longitudinal direction, the impact energy applied during the side collision of the vehicle is reduced. It is effectively absorbed to have the effect of preventing the fuel tank 4 from being damaged as much as possible.

Claims (2)

Horizontal members having a reinforcing plate (9) bent in a substantially ruler shape between the lower side frame (5) and the side frame is formed in both sides bent outwardly facing each other and is formed between the side frame (7) ( (3) In the rear body side reinforcement structure installed under the rear floor panel (1) of the automobile, characterized in that the reinforcement pipe (10) made of pipe shape in the longitudinal direction at the predetermined position of the reinforcement plate (9) is additionally installed. Side reinforcement structure of car rear body. The side of the rear body of claim 1, wherein the reinforcing pipe 10 is longitudinally attached to one of the connecting parts of the lower frame 5 and the side frame 7 of the horizontal member 3. Reinforcement structure.