JPH05104963A - Circumferential structure of automotive fuel tank - Google Patents

Abstract

PURPOSE:To reduce the weight and the cost while keeping the function for avoiding failure of a filler tube in the case of side collision. CONSTITUTION:The circumferential structure of automotive fuel tank has rear side members 1, a rear cross member 2 arranged between the rear side members 1, a sub-frame 3 whose front end part 3a and rear end part 3b are connected to the rear side member 1 and the rear cross member 2 respectively, a fuel tank 5 arranged on these car body members, and a filler tube 6 whose one end part 6a is supported by a car body decorative member 7 and another end part 6b is supported by the fuel tank 5 so that both end parts are communicated each other. This filler tube 6 is arranged so as to be located nearly on the connected part 10b of the rear cross member 2 and the rear end part 3b of the sub-frame 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure around a fuel tank for an automobile.

[0002]

2. Description of the Related Art As a technique of this kind, for example, as shown in FIGS. 5 to 7 (refer to the maintenance manual B13 type car issued by Nissan Motor Co., Ltd. in January 1990, reference code A010020), The structure around the fuel tank for an automobile includes a rear side member 1.1 and the rear side member 1.
A rear cross member 2 installed between the first and second sub-frames 3, a front end portion 3a of which is joined to the rear side member 1 with a joining portion 10a and a rear end portion 3b of which is joined to the rear cross member 2 with a joining portion 10b; A fuel tank 5 disposed on these vehicle body members via a fuel tank band 4, one end portion 6a thereof is supported by a vehicle body decorative member 7 such as a rear fender panel, and the other end portion 6b thereof is supported by the fuel tank 5. It has the filler tube 6 connected. Reference numeral 8 is a tire. A cap 9 is screwed onto one end 6 a of the filler tube 6. Since FIG. 5 is symmetrical with respect to the vehicle center (OX), only the left side is disclosed.

[0003]

However, the path of the filler tube 6 passes through the outside of the subframe 3 and the connecting portion 10b between the rear end portion 3b of the subframe 3 and the rear cross member 2. In order to protect the filler tube 6 in the event of a side collision, the rear side members 1 and 1 and the rear cross member 2 are reinforced by increasing the plate thickness. Therefore, there is a demand for improvement that causes an increase in weight or a rise in cost.

Also, in the case of a side collision, the flange 11 between the upper panel 11 and the lower panel 12 of the subframe 3
In order to prevent the filler tube 6 from being damaged by a and 12a, the connecting portion 10 with the rear cross member 2 is formed.
flange 12a of the lower panel 12 of the subframe 3 of b
Is bent upward so that the flanges of both flanges 11a and 12a are not exposed, but this also causes a cost increase, and improvement is desired.

The present invention has been made in view of the above points, and it is an object of the present invention to reduce the weight and the cost while maintaining the function of preventing the filler tube from being damaged during a side collision. This is intended to be achieved.

[0006]

As a structure around a fuel tank for an automobile of the present invention, a rear side member and a rear cross member installed between the rear side members,
A sub-frame having a front end portion coupled to the rear side member and a rear end portion coupled to the rear cross member, a fuel tank disposed in these vehicle body members, one end portion supported by a vehicle body decorative member, and the other. In a structure around a fuel tank for an automobile, which has a filler tube whose end is supported and communicated with the fuel tank,
The filler tube is arranged so as to pass through a substantially upper portion of a connecting portion between the rear end portion of the sub-frame and the rear cross member.

[0007]

[Operation] According to this structure, even if a side collision occurs, the joint portion between the rear end of the subframe and the rear cross member moves together with the filler tube due to the collision energy. There is no interference. Moreover, because of this structure, the plate thickness of the collision response member can be thin as in the conventional case, so that it is possible to reduce the weight and cost, and further, since it is not necessary to bend one of the flanges of the subframe, the cost can be reduced. become.

[0008]

1 is a plan view of a structure around a fuel tank for an automobile according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. The same members as those in FIG. 5 to FIG. 7 are denoted by the same reference numerals, and overlapping description will be omitted.

In the drawing, reference numeral 20 denotes a fuel tank surrounding structure for an automobile according to the present invention. The automobile fuel tank surrounding structure 20 includes a rear side member 1.1 and the rear side member 1.1.
A rear cross member 2 installed between the sub-frames 3, a front end 3a of which is joined to the rear side member 1 with a joint 10a and a rear end 3b of which is joined to the rear cross member 2 with a joint 10b; A fuel tank 5 disposed on these vehicle body members via a fuel tank band 4, one end portion 6a thereof is supported by a vehicle body decorative member 7 such as a rear fender panel, and the other end portion 6b thereof is supported by the fuel tank 5. It has the filler tube 6 connected. Reference numeral 8 is a tire. A cap 9 is screwed onto one end 6 a of the filler tube 6. Since FIG. 1 is symmetrical with respect to the vehicle center (OX), only the right side is disclosed. Reference numeral 21 is a floor panel. A bolt 22 is inserted into the connecting portion 10b of the rear end portion 3b from the lower side of the rear cross member 2, the subframe 3 is held via a collar 23, and a lower end portion of the bolt 22 is screwed with a nut 24. ing.

The filler tube 6 is arranged so as to pass through a substantially upper portion of a connecting portion 10b between the rear end portion 3b of the sub-frame 3 and the rear cross member 2. Therefore, according to this structure, even if a side collision occurs, the rear tube 3 and the rear cross member 2 together with the filler tube 6 can be absorbed by the collision energy.
Since the connecting portion 10b with and moves together, it does not interfere with the filler tube 6. Further, since the filler tube 6 is disposed so as to pass substantially above the coupling portion 10b, the filler tube 6 does not interfere with the road surface and is not affected by stones and the like. Moreover, because of this structure, the plate thickness of the collision response member may be thin as in the conventional case, so that the weight and cost can be reduced, and further, the subframe 3
Since it is not necessary to bend one of the flanges 11a and 12a, the cost can be reduced.

FIG. 3 is a plan view of a structure around a fuel tank for an automobile according to a second embodiment of the present invention, and FIG. 4 is a sectional view taken along line BB of FIG. This vehicle fuel tank surrounding structure 30
Is different from the vehicle fuel tank surrounding structure 20 mainly in that the filler tube 6 is arranged substantially linearly on the extension line of the rear cross member 2, and is otherwise the same, and therefore is duplicated. The description will be omitted. In the structure of the second embodiment, since the filler tube 6 is not positioned behind the rear cross member 2, the protection performance of the filler tube 6 in the case of a rear surface collision is further improved.

[0012]

As described above, according to the present invention, the structure around the fuel tank for an automobile includes a rear side member,
A rear cross member installed between the rear side members, a subframe having a front end portion connected to the rear side member and a rear end portion connected to the rear cross member, and a fuel tank arranged in these vehicle body members. And a filler tube having one end supported by the vehicle body decorative member and the other end supported by the fuel tank and connected to each other, in the fuel tank surrounding structure for an automobile, the filler tube is a rear end of the subframe. Therefore, even if a side collision occurs, even if a side collision occurs, the sub tube together with the filler tube due to the collision energy. Since the rear end of the frame and the joint between the rear cross member move together, the filler tube Interference that is not to be, there is no gasoline leakage problems. Moreover, because of this structure, the plate thickness of the collision response member can be thin as in the conventional case, so that it is possible to reduce the weight and cost, and further, since it is not necessary to bend one of the flanges of the subframe, the cost can be reduced. Therefore, it is possible to reduce the weight and cost while maintaining the function of preventing the filler tube from being damaged at the time of a side collision.

[Brief description of drawings]

FIG. 1 is a plan view of a structure around an automobile fuel tank according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a plan view of a structure around an automobile fuel tank according to a second embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG.

FIG. 5 is a plan view of a conventional structure around a fuel tank for an automobile.

6 is a side view taken along the arrow D in FIG.

7 is a cross-sectional view taken along line CC of FIG.

[Explanation of symbols]

 20 Automotive Fuel Tank Surrounding Structure 30 Automotive Fuel Tank Surrounding Structure 1 Rear side member 2 Rear cross member 3 Subframe 3a Subframe front end 3b Subframe rear end 5 Fuel tank 6 Filler tube 6a Filler tube one end 6b The other end of the filler tube 7 Car body decorative member 10a Joint portion 10b Joint portion

Claims (1)

[Claims] 1. A rear side member, a rear cross member installed between the rear side members, a subframe having a front end portion coupled to the rear side member and a rear end portion coupled to the rear cross member, and A structure for a fuel tank for an automobile, comprising: a fuel tank disposed in a vehicle body member; and a filler tube having one end supported by a vehicle body decorative member and the other end supported by the fuel tank and in communication with each other. A structure around a fuel tank for an automobile, wherein the tube is arranged so as to pass through a substantially upper portion of a joint between the rear end of the sub-frame and the rear cross member.