JPH0612151U - Fuel tank mounting structure - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a fuel tank mounting structure capable of increasing the mounting strength of a supporting member of a fuel tank and preventing deformation and damage of the supporting member by a simple supporting structure. A lateral bracket 3 attached to a cross member 2 supports an upper portion of a tank support member 7, and a flange 1a of a fuel tank 1 is supported on a lower side of the tank support member 7. When constructing such a fuel tank mounting structure, the lower portion of the lateral bracket 3 is extended along the tank support member 7, and the extended portion 6 is provided.
And the substantially central portion of the tank support member 7 are joined together.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fuel tank mounting structure for supporting a fuel tank on a vehicle body via a bracket.

[0002]

[Prior art]

 As an example of a structure for attaching a fuel tank to a vehicle body, there is known a structure in which the fuel tank is arranged on the back side of a floor panel below a rear seat (for example, see Japanese Utility Model Laid-Open No. 60-29724). In this mounting structure, the stepped portion of the floor panel and the cross member form a closed cross section, and the front flange of the fuel tank is directly supported by the cross member and the rear flange is directly supported by another cross member.

However, the structure described in the above publication has a problem that mounting workability is poor because the structure is mounted close to the floor panel. In addition, since the tank height is restricted by the cross member bulging rearward and by the floor panel, there is a problem that the capacity of the fuel tank is limited.

Therefore, in order to improve the workability of mounting the fuel tank and increase the strength of the mounting portion and the capacity of the fuel tank, a lateral bracket mounted on the cross member 2 as shown in FIG. It is proposed that the tank supporting member 17 is used by using the tank supporting member 13.

The lateral bracket 13 holds a lateral rod and is composed of two panels 14 and 15, and is inclined downward from one end 14a, 15a on the lower side toward the other end 14b, 15b. I am letting you. Horizontal pieces 14d and 15d projecting inward are integrally formed on the lower side, and vertical pieces 14e and 15e are integrally formed on the other end portions 14b and 15b, respectively.

Further, two bolt holes are formed in the side wall of one panel 14, and bolt holes 14 f, 15 f are formed in each side wall of both panels 14, 15, so that the end portion of the lateral rod (not shown) is formed. Is designed to hold.

The tank supporting member 17 is provided with an extension piece 17b extending in the horizontal direction at the lower end of the main body portion 17a. The extension piece 17b is provided with a bolt insertion hole corresponding to the bolt hole of the lateral bracket 13. A bolt insertion hole 8 is also formed in 17b.

Therefore, when mounting the fuel tank, the lateral brackets 13 are formed by welding the horizontal pieces 14d, 15d and the vertical pieces 14e, 15e of both panels 14, 15 to each other. Then, the tank support member 17 is attached to the side wall of the one panel 14 using the bolts 9a and 9a.

Thereafter, the bolt 9b is inserted into the bolt hole 8 of the extending piece of the tank support member 17 and the bolt hole of the front flange 1a to support the fuel tank 1 as shown in FIG. Further, the rear flange is supported by another cross member, and the other part of the flange is attached to a side member to hold the fuel tank 1.

[0010]

[Problems to be solved by the device]

 However, the fuel tank mounting structure of this type has a structure in which the bracket 13 extending below the cross member 2 and the supporting member 17 support the fuel tank 1, so that the mounting workability of the tank 1 is improved. Although it is possible and the capacity can be increased, the attachment strength is weak because the tank support member 17 is only attached to the lateral bracket 13 by the two bolts 8.

That is, since the tank support member 17 supports the fuel tank 1 in a cantilever manner between the lateral bracket 13 and the front flange 1 a, the tank support member 17 applies an inertial force in the front-rear direction to the fuel tank 1. And the like, the bending moment with the mounting portion of the tank support member 17 as a fulcrum becomes large. Therefore, in some cases, the tank support member 17 may be deformed or damaged.

The present invention has been made to solve the above problems, and an object thereof is to provide a fuel tank mounting structure capable of improving mounting strength while improving mounting workability and capacity. .

[0013]

[Means for Solving the Problems]

 According to the present invention, a lateral bracket is attached to a cross member arranged on the back side of the floor panel, and the upper portion of the tank support member is supported by the lateral bracket, while the fuel tank is attached to the lower side of the tank support member. In the fuel tank mounting structure in which the flange of is supported, the lower portion of the lateral bracket is extended along the tank supporting member, and the extending portion is connected to the substantially central portion of the tank supporting member. And

[0014]

[Action]

 According to the fuel tank mounting structure according to the present invention, the upper portion of the tank supporting member is supported by the lateral bracket extending below the cross member, and the extending portion extending from the lateral bracket is provided with the tank supporting member. Since the substantially central portion is supported and the fuel tank is attached to the lower portion of the tank supporting member, the tank supporting member is supported at three points. Therefore, when a force is applied in the front-rear direction to the fuel tank, the arm length becomes shorter because the joint between the tank support member and the above-mentioned extension becomes a fulcrum, and the bending moment becomes smaller accordingly. Installation strength is improved.

[0015]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are views for explaining a mounting structure of a fuel tank according to an embodiment of the present invention. FIG. 1 is a perspective view and FIG. 2 is a sectional view taken along line II-II of FIG. is there. In the figure, a fuel tank 1 is attached to a cross member and a side member (not shown) arranged on the back side of a floor panel of a vehicle body. One of the cross members is a lateral bracket 3 and a tank supporting bracket. It is configured to be supported via 7.

The cross member 2 has a U-shaped cross section, is laid across the side member, and has a lateral bracket 3 attached thereto. The lateral bracket 3 supports a lateral rod for preventing the shake of the vehicle body, and is formed by joining two panels 4 and 5.

Both panels 4 and 5 have a substantially symmetrical shape, are inclined downward from one end 4a, 5a on the lower side toward the other end 4b, 5b, and are provided with stepped portions 4c, 5c in the middle. Then, horizontal pieces 4d and 5d projecting inward are provided between the step portions 4c and 5c and the one end portions 4a and 5a, and vertical pieces 4e and 5e are respectively provided to the other end portions 4b and 5b. It is integrally formed.

Further, the step portion 5 c of the other panel 5 is formed with an extending portion 6 extending downward along the side wall of the one panel 4. A bolt hole is formed in the center of the lower portion of the extending portion 6 and the side wall of the one panel 4. 4f and 5f are bolt holes formed in the side walls of the panels 4 and 5, respectively, and the ends of the lateral rods are supported by the bolts inserted and retained in the bolt holes 4f and 5f. There is. The tank supporting bracket 7 is provided with an extending piece 7b extending in the horizontal direction at the lower end of the main body portion 7a, and reinforcing flanges 7c are integrally formed on both side portions of the extending piece 7b and the main body portion 7a. There is. Then, a bolt insertion hole is formed at a substantially central portion corresponding to the bolt hole of the lateral bracket 3, and a bolt insertion hole 8 is also formed in the extension piece 7b.

Therefore, when mounting the fuel tank 1, the lateral bracket 3 and the tank supporting bracket 7 are fixed to the cross member 2. Regarding the lateral bracket 3, according to the width of the cross member 2, the horizontal pieces 4d and 5d of both panels 4 and 5 and the vertical pieces 4e and 5e are joined by welding, and the bolts of one panel 4 and the extension portion 6 are joined together. Insert bolts 9a and 9c into the holes and fasten them with a nut. Then, the lateral brackets 3 in which the tank supporting brackets 7 are continuously provided are welded and fixed to both side walls of the cross member 2.

In this state, the tank supporting bracket 7 hangs below the cross member 2, and a large distance is secured between the extending piece 7b of the bracket 7 and the back surface of the floor panel. After that, the bolt 9b is inserted into the bolt hole 8 of the extending piece 7b and the bolt hole provided in the front flange 1a of the fuel tank 1, and the fuel tank 1 is supported by screwing the nut. Although not shown, the rear flange of the fuel tank 1 is directly supported by another cross member and is also attached to a side member to arrange the fuel tank 1 on the back side of the floor panel.

As described above, in this embodiment, since the large distance from the back surface of the floor panel is secured, the mounting work is easy, and there is no restriction on the tank height or restriction by the cross member 2. Therefore, a sufficient tank capacity can be secured.

Further, the mounting strength of the fuel tank 1 is significantly improved as compared with the conventional one. That is, since the tank supporting bracket 7 supports the fuel tank 1 at three points of the lateral bracket 13, the extending portion 6 and the front flange 1a, the inertial force in the front-rear direction due to sudden braking or the like is applied to the fuel tank 1. When acting, the joint portion of the tank supporting bracket 7 with the extending portion 6 serves as a fulcrum, so that the substantial arm length is shortened from a to b, and the bending moment is reduced accordingly. Therefore, problems such as deformation and damage are prevented.

Further, in supporting the middle of the bracket 7, since a part of the other panel 5 is extended to form the extension portion 6, compared to the case where a separate extension component is fixed by welding, It is possible to avoid an increase in points and work man-hours.

In the above embodiment, the lateral bracket 13 is described as a case where the two panels 4 and 5 are joined to each other and the extending portion 6 is provided on one side. However, the lateral bracket 13 has a U-shaped cross section. It can also be applied to the case where the extending portion is integrally formed on the lower side of the single lateral bracket, and by attaching the tank supporting bracket 7 to this, the same operation and effect as described above can be obtained.

[0025]

[Effect of device]

 As described above, according to the fuel tank mounting structure of the present invention, the upper portion of the tank supporting member is supported by the lateral bracket, the substantially central portion is supported by the extending portion, and the fuel tank is supported on the lower side. Therefore, this tank support member will be supported at three points. As a result, the arm length when the force in the front-rear direction acts on the fuel tank is shortened, the mounting strength is improved accordingly, and the problem that the tank support member is deformed or damaged can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing a mounting structure of a fuel tank according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view showing a conventional fuel tank mounting structure.

4 is a sectional view taken along line IV-IV of FIG.

[Explanation of symbols]

 3 Lateral bracket 6 Extension part 7 Tank support member

Claims (1)

[Scope of utility model registration request] 1. A lateral bracket is attached to a cross member arranged on the rear surface side of a floor panel, and an upper portion of a tank support member is supported by the lateral bracket, while a fuel tank is attached to a lower side of the tank support member. In a fuel tank mounting structure in which a flange is supported, a lower portion of the lateral bracket is extended along a tank supporting member, and the extending portion is connected to a substantially central portion of the tank supporting member. Fuel tank mounting structure.