JPH0326988Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The disclosed technology belongs to the technical field of the structure of a fuel tank case that covers a fuel tank of an automobile.

This invention relates to an automobile fuel tank case structure consisting of an exterior material that is supported on the upper part of the floor between the suspension towers of the rear wheel house on both sides of the vehicle body, and the fuel tank is supported and fixed inside. In particular, the invention relates to an automobile fuel tank case structure in which the exterior material has a closed cross section, extends in the width direction of the vehicle body, and its ends are supported and fixed to suspension towers of rear wheel houses on both sides of the vehicle body. It is.

<Prior Art> As is well known, a fuel tank case for an automobile protects the fuel tank by covering the outer periphery of the fuel tank with an exterior material such as a panel material. The fuel tank case can be installed in the lower part of the car body behind the rear seat, which provides better stability for the car body and has the advantage of being able to hold a large amount of fuel. A backpack-type system is often used, which has the advantage of being installed on the upper part and making effective use of the dead space between the rear wheel houses behind the rear seats. .

Of these, the latter backpack-type fuel tank and fuel tank case are attached to the vehicle body by fixing the fuel tank case to the floor and back of the rear seat between the rear wheel houses, and attaching the fuel tank to the vehicle body. The fuel tank is supported and installed inside the case.

<Problem to be solved by the invention> However, since various loads are applied to the car body from various directions, it is necessary to use many car body reinforcement materials in each part of the car body, and the above-mentioned When a fuel tank and a fuel tank case are installed according to the above-mentioned system, the load applied to the suspension tower inward in the axle direction due to vibration input from the road surface is mainly applied, and the reinforcing material is inserted between the suspension towers. In order to do so, it is necessary to avoid interference with the fuel tank case fixed on the floor, and the reinforcing material used for this purpose has to be designed with a small cross-sectional area. There was a negative point that it was undesirable due to insufficient strength.

Furthermore, bending loads are applied rapidly due to twisting of the vehicle body, and if a reinforcing material having a large plate thickness is used to cope with this, there is a problem in that fuel efficiency deteriorates due to the increase in weight.

The purpose of this invention is to solve the technical problem of the automobile fuel tank case structure based on the above-mentioned conventional technology, and to ensure reinforcement of the vehicle body between the suspension towers without changing the position of the fuel tank. In particular, it is an object of the present invention to provide an excellent fuel tank case structure for an automobile that takes advantage of the backpack-style design, improves the reliability of the vehicle body, and is beneficial to the field of application of reinforcement technology in the automobile industry. .

<Means for solving the problem> In order to solve the above-mentioned problem, the configuration of this invention, which is based on the above-mentioned utility model registration claim, is based on the above-mentioned purpose. This is a fuel tank case structure for an automobile, which has a fuel tank inside and is formed of an exterior material extending between the suspension towers of the rear wheel house, the exterior material having a closed cross section and both ends extending along the width of the vehicle body. This is an automobile fuel tank case structure that extends in the direction and is fixed to the suspension tower of the rear wheel house on both sides of the vehicle body.

<Function> Thus, the closed-section exterior material, which is supported on the upper part of the floor between the suspension towers of the wheel houses on both sides of the vehicle body and has the fuel tank inside, is extended in the width direction of the vehicle body. A technical measure is taken in which both ends are fixed to the suspension tower and the vehicle body reinforcement between the suspension towers is achieved by a strong member having a large closed cross-sectional area.

<Example> Next, an example of this invention will be described below based on the drawings.

In the embodiment shown in FIGS. 1 and 2, 1 is a fuel tank case, which forms the center of the gist of this invention, and the fuel tank case 1 includes a first plate 2 and a second plate as exterior materials. 3. The third plate 4 is sequentially joined at its edges to form a box-like shape with a closed cross section, and a fuel tank 5 is fixed and housed therein by appropriate means such as assembly.

The fuel tank case 1 is inserted between the suspension towers 6', 6' of the rear wheel high speed wheels 6, 6 on both sides at the rear of the vehicle body, and the side portions at both ends and the upper extension portion are bolted. At the same time, the lower surface is tightened to the center floor 8 and the upper surface to the upper back 9 by bolts 7'.

The fuel tank case 1 is attached to the center floor 8 by welding and fixing weld nuts 10 on the back side in advance, and by using bolt insertion holes 11...
11'... are bored in each cross member 12,
and a mounting bracket 13 are fixed to the center floor 8 by welding, the fuel tank case 1 is placed on the top of the cross member 12 and the mounting bracket 13, and the hole drilled in the fuel tank case 1 is fixed to the center floor 8 by welding. Bolts 7', 7'... are inserted through 11', 11'..., and the cross members 12,
The mounting bracket 13 is screwed into the weld nuts 10 on the lower surface of the mounting bracket 13 to be fixed.

In addition, when attaching the fuel tank case 1 to the upper bag 9, weld nuts 10 are welded and fixed to the back side of the upper bag 9 in advance, and holes 11' and 1 drilled in the fuel tank case 1 are used.
1'... and a hole 11' drilled in the upper bag 9,
The bolts 7', 7', .

In the above configuration, the outer periphery of the fuel tank 5 is a fuel tank case 1 consisting of the first plate 2, second plate 3, and third plate 4, which are exterior materials.
to prevent the fuel tank 5 from being deformed or damaged due to shock vibrations from the outside. Since the suspension towers 6', 6' are extended and fixed to the suspension towers 6', 6' by bolts 7, 7..., the space between the suspension towers 6', 6' on both sides of the vehicle body is supported by the fuel tank case 1. , so that the load applied to each suspension tower 6 inward in the vehicle width direction due to input from the road surface while driving is reliably supported by the closed cross section of the fuel tank case 1.

In this case, the torsion of the vehicle body causes a backlash of 9
Since the bending load applied to the upper bag 9 is reduced, the thickness of the upper bag 9 does not need to be so thick, and can be made as thin as possible, making it easier to weigh and reduce fuel consumption.

It goes without saying that the embodiment of this invention is not limited to the above-mentioned embodiment. For example, as in the embodiment shown in FIG. The outer periphery of the plates 2', 3', 4' is fixed to the suspension tower 6' of the rear wheel houses 6, 6 on both sides of the vehicle. , 6', and the exterior material covering the tank case may not be a combination of several plates but may be integrally molded. Adoptable.

<Effects of the invention> As described above, according to this invention, basically when installing a fuel tank case of an automobile, it is possible to install the fuel tank case in a backpack style without changing the fuel tank arrangement.
While utilizing the advantages of the backpack type, an excellent effect can be achieved in that the rigidity of the automobile body can be improved and the reliability of the automobile body against shocks and vibrations can be increased.

That is, the fuel tank is installed internally, and the closed-section exterior material provided between the suspension towers on both sides of the vehicle body is extended and its ends are fixed to both suspension towers. The case can be used not only as a tank case, but also as a reinforcement material for the vehicle body, as in the past.Moreover, since it is supported by the wide closed section of the fuel tank case that covers the outer periphery of the fuel tank, it can be used as a tank case while driving. Input from the road surface causes a load to be applied to the suspension tower inward in the vehicle width direction, and the suspension tower is sufficiently supported, resulting in the excellent effect of making the support and reinforcement of the vehicle body more reliable and strong.

In addition, since the bending load applied to the upper back due to torsion of the vehicle body is reduced, the thickness of the upper back can be made thinner, reducing weight, which also has the effect of improving fuel efficiency.

[Brief explanation of the drawing]

1 and 2 are views of one embodiment of this invention; FIG. 1 is a partial perspective view, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a longitudinal sectional view of another embodiment. 6...Rear wheel house, 6'...Suspension tower, 5...Fuel tank, 2,3,
4...Exterior material, 1...Automobile fuel tank case.

Claims (1)

[Scope of utility model registration request] In a fuel tank case structure of an automobile, which is supported on the upper part of the floor between the rear wheel houses on both sides of the vehicle body, has a fuel tank inside, and is formed of an exterior material extending between the suspension towers of the rear wheel house. A fuel tank case structure for an automobile, characterized in that the case has a closed section, both ends thereof extend in the width direction of the vehicle body, and are fixed to suspension towers of rear wheel houses on both sides of the vehicle body.