JP6708965B2 - Vehicle rear structure - Google Patents

Description

The present invention relates to a vehicle rear structure.

In Patent Document 1 below, as a rear structure of a vehicle in which a spare tire is provided under the floor, a stringer that connects a rear end cross and a rear cross member arranged in front of the stringer (a load distributing member 7 in Patent Document 1 below). And a structure for attaching a towing hook to the stringer is shown. Accordingly, even when a pulling load is applied to the pulling hook, the load can be distributed to the cross member and the rear side member as well as the stringer.

JP, 2006-88740, A

The towing hook shown in Patent Document 1 is provided at the center position in the vehicle width direction, but in this case, at the time of a rear collision, the hook pushes the wheel of the spare tire forward to cause a tire hit to the fuel tank ( Fuel leakage may occur due to a spare tire collision. Also, the hook is an obstacle when taking out the spare tire.

The present invention has been made in view of the above technical problems, and an object thereof is to provide a vehicle rear structure capable of preventing fuel leakage due to a tire hit to a fuel tank at the time of a rear impact and facilitating removal of a spare tire. And

A vehicle rear structure according to a first invention for solving the above-mentioned problems,
A first rear side member and a second rear side member that extend in the vehicle front-rear direction at both ends in the vehicle width direction;
A first rear cross member extending in the vehicle width direction behind the fuel tank and connecting the first rear side member and the second rear side member;
A rear end cross that extends in the vehicle width direction at the rearmost portion of the vehicle and connects the first rear side member and the second rear side member;
A stringer that extends in the vehicle front-rear direction and connects the rear end cross and the first rear cross member;
A vehicle rear structure comprising a hook attached to the stringer and a spare tire attached to a lower surface side of the first rear cross member,
The spare tire is arranged such that its center is located closer to the first rear side member than the center position in the vehicle width direction,
The stringer is arranged closer to the second rear side member than a center position in the vehicle width direction in a range overlapping the spare tire .

A vehicle rear structure according to a second invention for solving the above-mentioned problems,
In the vehicle rear structure according to the first aspect of the invention,
The stringer does not overlap the wheel portion of the spare tire in the vehicle width direction and does not overlap the tire portion of the spare tire.

A vehicle rear structure according to a third invention for solving the above-mentioned problems,
In the vehicle rear structure according to the first or second invention,
The spare tire is supported by a spare tire hanger,
The stringer does not overlap with the spare tire hanger in the vehicle width direction.

A vehicle rear structure according to a fourth invention for solving the above-mentioned problems,
In the vehicle rear structure according to any one of the first to third inventions,
The stringer is arranged at a position within 20% of the vehicle width from the center position in the vehicle width direction.

A vehicle rear structure according to a fifth invention for solving the above-mentioned problems,
In the vehicle rear structure according to any one of the first to fourth inventions,
The filler pipe connected to the fuel tank is provided so as to extend toward the second rear side member side from the center position in the vehicle width direction.

A vehicle rear structure according to a sixth invention for solving the above-mentioned problems,
In the vehicle rear structure according to any one of the first to fifth inventions,
A second rear cross member that extends in the vehicle width direction between the first rear cross member and the fuel tank in the vehicle front-rear direction and that connects the first rear side member and the second rear side member,
A bracket protruding rearward from the second rear cross member,
The lower surface of each of the first rear cross member, the stringer, and the bracket serves as a contact surface with respect to the upper surface of the spare tire.

According to the vehicle rear portion structure of the present invention, it is possible to prevent fuel leakage due to a tire hit to the fuel tank at the time of a rear collision, and to facilitate removal of the spare tire.

It is a schematic bottom view showing the vehicle rear part structure concerning the example of the present invention. It is a schematic partial perspective view showing the stringer periphery in the Example of this invention. FIG. 3 is a schematic bottom view for explaining the moving direction of the spare tire at the time of a rear collision in the example of the present invention. It is a schematic bottom view explaining the contact surface of the spare tire in the Example of this invention. It is a schematic top view explaining the offset rear impact test of 70% overlap.

Hereinafter, a vehicle rear portion structure according to the present invention will be described with reference to the accompanying drawings.

[Example]
FIG. 1 is a schematic bottom view showing a vehicle rear structure according to an embodiment of the present invention. A vehicle rear structure according to an embodiment of the present invention will be described first with reference to FIG.

The first rear side member 11 and the second rear side member 12 respectively extend in the vehicle front-rear direction at both ends in the vehicle width direction. The first rear side member 11 and the second rear side member 12 include a first rear cross member 16 extending in the vehicle width direction behind the fuel tank 13, a rear end cross 15 extending in the vehicle width direction at the rearmost portion of the vehicle, The first rear cross member 16 and the fuel tank 13 in the vehicle front-rear direction are connected by a second rear cross member 14 extending in the vehicle width direction.

Further, in this embodiment, the spare tire 17 including the tire 17a and the wheel 17b is attached to the lower surface side of the first rear cross member 16 by the spare tire hanger 18. Further, the spare tire 17 is attached so as to approach the first rear side member 11 side in the vehicle width direction. That is, the spare tire 17 is arranged such that its center is located closer to the first rear side member 11 side than the center position in the vehicle width direction.

The spare tire hanger 18 includes a fixed first spare tire hanger member 19 and a movable second spare tire hanger member 20, and supports the spare tire 17.

The first spare tire hanger member 19 extends substantially in the vehicle width direction so as to pass through the lower surfaces of the tire 17a and the wheel 17b, and one end 19a thereof is the first rear side member 11 and the other end 19b is the first rear cross member. The spare tire 17 is fixed to each of the parts 16 and supports the spare tire 17 from the lower surface side.

The second spare tire hanger member 20 is a substantially U-shape that passes through the lower surfaces of the tire 17 a (tire portion) and the wheel 17 b (wheel portion), and both end portions 20 a and 20 b of the second spare tire hanger member 20 are of the second rear cross member 14. The lower surface of the second rear cross member 14 is fixed to the lower surface so as to be movable in a predetermined angle range below the second rear cross member 14 in the vehicle height direction. The second spare tire hanger member 20 is detachably fixed by a spare tire hanger hook 18a provided on the lower surface of the rear end cross 15 at a substantially intermediate position thereof.

With the above-described structure, the second spare tire hanger member 20 supports the spare tire 17 from the lower surface side, and removes the second spare tire hanger member 20 from the spare tire hanger hook 18a to take out the spare tire 17. Is something that can be done.

As described above, in the present embodiment, since the spare tire 17 is provided so as to be close to the first rear side member 11 side in the vehicle width direction, a substantially U-shaped first tire supporting the spare tire 17 is provided. 2 The intermediate position of the spare tire hanger member 20 is also on the first rear side member 11 side in the vehicle width direction, and accordingly, the installation location of the spare tire hanger hook 18a is also on the first rear side member 11 side with respect to the center in the vehicle width direction. Has become.

By the way, FIG. 2 is a schematic partial perspective view showing the vicinity of the stringer in the embodiment of the present invention. As shown in FIGS. 1 and 2, in the present embodiment, the stringer 21 extending in the vehicle front-rear direction is arranged closer to the second rear side member 12 side than the center position in the vehicle width direction, and the rear end cross 15 and the first rear side. The cross member 16 is connected. A stringer-side hook 22 that can be used during transportation or jacking up is provided at the location where the stringer 21 is attached to the rear end cross 15. The load applied to the stringer-side hook 22 during transportation or jacking-up is distributed to the first rear cross member 16 and the first and second rear side members 11 and 12 via the stringer 21.

Further, the stringer 21 does not overlap with the wheel 17b of the spare tire 17 in the vehicle width direction, but overlaps only with the tire 17a. That is, the stringer side hook 22 does not overlap with the wheel 17b of the spare tire 17 in the vehicle width direction, but overlaps only with the tire 17a. In addition, the overlapping portion with the tire 17a may be the entire widthwise direction of the stringer 21 or a part thereof (in FIG. 1, the stringer 21 is shown overlapping with the entire widthwise direction). ..

FIG. 3 is a schematic bottom view for explaining the moving direction of the spare tire at the time of a rear collision in this embodiment. The white arrow in the figure indicates the moving direction of the spare tire 17. As shown in FIG. 3, in the present embodiment, at the time of a rear impact, the stringer side hook 22 does not push the wheel 17b of the spare tire 17 forward as in the prior art, and the advance amount of the spare tire 17 is suppressed, In addition, the spare tire 17 will fly obliquely forward, and fuel leakage due to a tire hit to the fuel tank 13 can be prevented.

Further, in this embodiment, the spare tire 17 can be easily removed. That is, if the stringer side hook 22 is arranged near the center of the spare tire 17 as in the prior art, it becomes difficult to remove the spare tire 17, but in the present embodiment, the stringer side hook 22 is located at the center of the spare tire 17. Since it is displaced from the vicinity, it is easy to remove the spare tire 17.

Furthermore, in the present embodiment, it is possible to suppress the first rear cross member from breaking during a frontal collision. For example, at the time of a frontal collision, a forward force is applied to a seat (not shown). At that time, the fixed point of the seat tries to move upward so that the first rear cross member 16 is bent, but this is suppressed by providing the stringer 21 as in the present embodiment. You can

By the way, as shown in FIG. 1, the second rear cross member 14 is provided with a bracket 23 at substantially the same position as the wheel 17b of the spare tire 17 in the vehicle width direction. The bracket 23 projects rearward and serves as a contact surface for the spare tire 17 (particularly the tire 17a).

That is, the lower surface side of the spare tire 17 is supported by the spare tire hanger 18, and the upper surface side of the spare tire 17 is indicated by a broken line circle A in the schematic bottom view for explaining the contact surface of the spare tire in this embodiment of FIG. , B, and C, the contact surfaces are the three lower surfaces of the first rear cross member 16, the stringer 21, and the bracket 23.

In the present embodiment, the stringer 21 serves as the contact surface of the spare tire 17 at the position on the second rear side member 12 side from the center position in the vehicle width direction (broken line circle B in FIG. 4), and thus, compared to the prior art. The distance from the other two places (broken line circles A and C in FIG. 4) to the contact surfaces is increased, and the spare tire 17 can be fixed stably.

Further, in this embodiment, the stringer side hook 22 is prevented from overlapping the spare tire hanger 18 in the vehicle width direction. As a result, it is possible to prevent the stringer side hook 22 from coming into contact with the spare tire hanger 18 (particularly, the second spare tire hanger member 20) at the time of a rear collision and disengaging the spare tire hanger 18 from the spare tire hanger hook 18a. As a result, the fall of the spare tire hanger 18 and the flying object can be prevented.

FIG. 5 is a schematic top view illustrating a 70% overlap offset rear impact test, and shows a state in which the collision test barrier 2 is offset rearwardly impacted to the vehicle body 1. Note that FIG. 5 is a top view and the arrangement position of the stringers 21 is reversed from that in FIG. 1 which is a bottom view.

In the present embodiment, it is more preferable that the stringer 21 is arranged at a position within 20% (of the vehicle width) from the center position in the vehicle width direction. By setting in this way, in consideration of the offset rear collision, if the rear collision is from the second rear side member 12 side where the stringer 21 is close, the stringer 21 can not only absorb the collision energy, but also As shown in FIG. 5, the collision energy can be absorbed by the stringer 21 even when the rear collision occurs from the first rear side member 11 side with an overlap of 70% (or more).

A filler pipe 24 is connected to the fuel tank 13. In this embodiment, as shown in FIG. 1, the filler pipe 24 is provided so as to extend from the center position of the fuel tank 13 in the vehicle width direction to the second rear side member 12 side (stringer 21 side).

As a result, in this embodiment, it is possible to avoid a tire hit to the filler pipe 24 (a collision of the spare tire 17) at the time of a rear-end collision and prevent fuel leakage.

In this embodiment, it is more preferable to determine the positions of the stringer 21 and the stringer-side hook 22 in consideration of the stability at the time of jacking up.

The present invention is suitable as a rear structure of a vehicle.

1 Car Body 2 Crash Test Barrier 11 First Rear Side Member 12 Second Rear Side Member 13 Fuel Tank 14 Second Rear Cross Member 15 Rear End Cross 16 First Rear Cross Member 17 Spare Tire 17a Tire 17b Wheel 18 Spare Tire Hanger 18a Spare Tire Hanger Hook 19 First spare tire hanger member 19a One end 19b Other end 20 Second spare tire hanger member 20a, 20b End 21 Stringer 22 Stringer side hook 23 Bracket 24 Filler pipe

Claims (6)

A first rear side member and a second rear side member that extend in the vehicle front-rear direction at both ends in the vehicle width direction;
A first rear cross member extending in the vehicle width direction behind the fuel tank and connecting the first rear side member and the second rear side member;
A rear end cross that extends in the vehicle width direction at the rearmost portion of the vehicle and connects the first rear side member and the second rear side member;
A stringer that extends in the vehicle front-rear direction and connects the rear end cross and the first rear cross member;
A vehicle rear structure comprising a hook attached to the stringer and a spare tire attached to a lower surface side of the first rear cross member,
The spare tire is arranged such that its center is located closer to the first rear side member than the center position in the vehicle width direction,
The vehicle rear portion structure, wherein the stringer is arranged closer to the second rear side member than a center position in the vehicle width direction in a range overlapping with the spare tire . The vehicle rear portion structure according to claim 1, wherein the stringer does not overlap a wheel portion of the spare tire and does not overlap a tire portion of the spare tire in the vehicle width direction. The spare tire is supported by a spare tire hanger,
The vehicle rear structure according to claim 1 or 2, wherein the stringer does not overlap with the spare tire hanger in the vehicle width direction. The vehicle rear portion structure according to any one of claims 1 to 3, wherein the stringer is arranged at a position within 20% of a vehicle width from a center position in the vehicle width direction. The vehicle according to any one of claims 1 to 4, wherein the filler pipe connected to the fuel tank is provided so as to extend toward the second rear side member side from a center position in the vehicle width direction. Rear structure. A second rear cross member that extends in the vehicle width direction between the first rear cross member and the fuel tank in the vehicle front-rear direction and that connects the first rear side member and the second rear side member,
A bracket protruding rearward from the second rear cross member,
The lower surface of each of the first rear cross member, the stringer, and the bracket serves as a contact surface with respect to an upper surface of the spare tire. Vehicle rear structure.

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