JPH078278Y2 - Fuel tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a fuel tank for an automobile.

(Prior Art) Generally, a drain hole for draining fuel and the like in the tank is formed at the bottom of the fuel tank, and the drain hole is normally closed by screwing a bolt.

By the way, it is desirable to provide the drain hole on the lowermost surface of the tank in order to reliably remove the fuel in the tank without remaining, but when the drain hole is provided on the lowermost surface of the tank like this. The bolt protrudes further downward than the lowermost surface of the tank, so that the head of the bolt collides with the road surface when the vehicle is traveling on a bad road, and the bolt is damaged or the drain hole. There is a possibility that the seal may become defective.

Therefore, conventionally, as shown in FIG. 4, for example, the bottom wall (A) of the tank is partially inclined obliquely upward to form the inclined wall (B).
The drain hole (C) is formed by forming a drain hole (C) in the
It has been proposed that the head of a bolt (D) that closes the tank be located above the lowermost surface of the tank.

When draining fuel from the tank having the above structure, the vehicle is inclined so that the inclined wall (B) is substantially horizontal and the drain hole (C) is located at the lowest portion of the tank. Although fuel or the like is extracted from the drain hole (C), it is very difficult to accurately incline the entire vehicle so that the inclined wall (B) is horizontal, and the inclined wall (B) is inevitable. A tilt occurs, which makes it impossible to drain all the fuel in the tank.

The present invention was developed in view of the above circumstances, and an object of the present invention is to keep the fuel and the like in the tank even if the head of the bolt that closes the drain hole is located above the lowermost surface of the tank. It is to provide a fuel tank that can be reliably pulled out.

(Means for Solving the Problem) However, according to the present invention, an intermediate wall that is one step higher than the general surface of the bottom wall is formed at a corner portion of the bottom wall of the fuel tank, and a drain hole is formed in the intermediate wall. While being formed, a weir surrounding the drain hole is provided at a boundary of the intermediate wall with the bottom wall and is one step higher than the intermediate wall.

According to the present invention, when the vehicle is tilted together with the fuel tank and the fuel and the like are extracted, even if some of the fuel remains in one corner of the intermediate wall in the tank, the vehicle is kept horizontal with the fuel tank. When returning to the state, the residual fuel is blocked by the weir and prevented from flowing to the bottom wall side, and is reliably discharged from the drain hole of the horizontal intermediate wall.

(Embodiment) A fuel tank according to the present invention will be described below with reference to an embodiment shown in the drawings.

The fuel tank shown in the figure basically has a welded flange (10) having an open top surface and extending outward at the periphery of the opening.
A box-shaped lower housing (1) provided with a box-shaped lower housing (1), and a box-shaped upper housing (2) having a lower surface opened and a welding flange (20) facing the welding flange (10) provided on the circumference of the opening. , The upper housing (2) is placed on the lower housing (1), and both welding flanges (1
Both housings (1) and (2) are integrally assembled by fixing the 0) and (20) by seam welding.

In the embodiment shown in the drawings in the above fuel tank, the intermediate wall (3), which is one step higher than the general surface of the bottom wall (11), is provided at the corner portion of the bottom wall (11) of the lower housing (1). Forming a circular drain hole (4) in the center of the intermediate wall (3), forming a circular drain hole (4) in the center of the intermediate wall (3), A ring-shaped retainer (5) is fixed to the upper surface of (3) so as to communicate with the drain hole (4), and a bolt (6) is attached to the drain hole (4) from the lower surface side of the intermediate wall (3). ), The drain hole (4) is closed by the bolt (6).

The intermediate wall (3) shown in the figure is slightly higher than the head (60) of the bolt (6) with respect to the bottom wall (11), and is slightly higher than the bottom wall (11).ゞ I try to be parallel.

Further, a concave groove (51) extending in the radial direction is formed on the lower surface of the retainer (5) shown in the figure, and fuel or the like on the intermediate wall (3) is drained through the concave groove (51). The discharge is made to the hole (4) side.

Further, as shown in FIG. 2, the boundary portion of the intermediate wall (3) with the bottom wall (11) is bulged further upward so that it is higher than the intermediate wall (3). And a weir (7) surrounding the drain hole (4).

To remove the fuel from the fuel tank with the above structure, jack up one side of the car,
As shown in FIG. 3, the intermediate wall (3) is the bottom wall (11).
The bolt (6) is removed after inclining it so that the fuel in the tank is discharged to the outside through the drain hole (4).

Even if most of the fuel in the tank is discharged and the fuel is no longer discharged from the drain hole (4), the tank is inclined as shown in FIG. Part of the fuel (G) remains on the intermediate wall (3) inclined downward from the drain hole (4).

Therefore, when the jack-up of the automobile is released and the tank is returned to the horizontal state, the fuel remaining on the intermediate wall (3) tends to flow to the bottom wall (11) side. (7) prevents the inflow to the bottom wall (11) side,
It becomes horizontal and the groove (5
It is discharged to the outside through 1) and the drain hole (4).

(Effect of the Invention) As described above, according to the present invention, the intermediate wall, which is one step higher than the general surface of the bottom wall, is formed at the corner portion of the bottom wall of the fuel tank, and the drain hole is formed in the intermediate wall. Therefore, the head of the bolt that closes the drain hole is located above the lowermost surface of the tank, and the bolt will not be damaged during traveling on a bad road.

Moreover, according to the present invention, a weir is provided at the boundary between the intermediate wall and the bottom wall, which is higher than the intermediate wall and is different from the drain hole. Therefore, the vehicle is tilted to extract fuel and the like. At this time, even if a part of the fuel remains in one corner of the intermediate wall in the tank, the remaining fuel is blocked by the weir and prevented from flowing to the bottom wall side by returning the automobile to a horizontal state, Since it is surely discharged from the drain hole of the intermediate wall in the horizontal state, it is possible to surely stop the fuel and the like in the tank without remaining.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the fuel tank according to the present invention, FIG. 2 is a perspective view of the essential part, and FIG. 3 is a tilted view of the fuel tank according to the present invention. FIG. 4 is a cross-sectional view of an essential part showing a state in which the fuel tank is in a closed state, and FIG. (11) …… Bottom wall (3) …… Intermediate wall (4) …… Drain hole (7) …… Weir

Claims (1)

[Scope of utility model registration request] 1. A corner portion of a bottom wall of a fuel tank,
By forming an intermediate wall that is one step higher than the general surface of the bottom wall,
A fuel tank characterized in that a drain hole is formed in the intermediate wall, and a weir surrounding the drain hole is provided at a boundary of the intermediate wall with the bottom wall so as to be higher than the intermediate wall.