JPH0517302Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a fuel suction device for an automobile fuel tank.

Conventional Technology The fuel tank of an automobile is located near the ground, such as under the trunk. For this reason, if you drain the fuel from the bottom of the tank, there is a risk that the fuel drain pipe will be damaged by uneven road surfaces or stones thrown by tires while driving, making it impossible to supply fuel to the engine. The upper pipe plunges into the tank from above to suck up fuel and supply it to the engine.

In this case, the inside of the fuel tank becomes negative pressure, and the bottom of the tank protrudes upward, or the bottom of the tank contacts the road surface and deforms upward, blocking the lower end of the suction pipe and preventing the supply of fuel to the engine. In order to avoid this, the lower end of the suction pipe is spaced upward from the bottom of the tank (see, for example, Japanese Utility Model Application Publication No. 127129/1983).

Problems that the invention aims to solve: Therefore, the fuel in the tank that can be drawn up by the suction pipe is up to the level of the lower end of the suction pipe.For example, the fuel that can be drawn up by the suction pipe and supplied to the engine is 40
In this case, the fuel tank needs to have a capacity of 45 to 50, which increases the size and weight of the fuel tank accordingly.

Means for Solving the Problems Therefore, the present invention was developed with the aim of solving the above problems.The lower end of the suction pipe is inserted upward from the bottom of the tank, and An extension pipe that is longer than the distance between the lower end and the bottom of the tank is provided so that it can move up and down, and around the suction port at the tip of the extension pipe, the suction port is held near the bottom of the tank, and a A plurality of barrier members capable of restricting the inflow of water are arranged approximately radially, and are installed inside the extension pipe, and the extension pipe is installed on the bottom of the tank between the lower end of the suction pipe and the extension pipe or the barrier member. An elastic body is provided that biases toward.

In other words, according to the present invention, the suction pipe has the suction port at the tip of the extension pipe connected to the bottom end near the bottom of the tank, so it is possible to suck up the fuel in the tank to the level near the bottom of the tank. In addition to eliminating the need to increase the capacity of the tank, this extension pipe is biased toward the bottom of the tank, so the bottom of the tank will not face upwards due to negative pressure inside the tank or contact with the road surface. If the extension pipe deforms to As the suction pipe moves downward, the fuel can be sucked up to the bottom of the tank. The error can also be absorbed by an extension conduit energized towards.
In addition, if a relatively large foreign object such as a piece of duct tape, a piece of cloth, or a stopper of a bottle or can containing soft drinks etc. accidentally enters the tank, the above-mentioned barrier member will prevent the foreign object from entering the tank. This can prevent the intake port from being blocked.

Embodiments Hereinafter, the present invention will be explained based on illustrated embodiments.

Reference numeral 1 denotes a fuel tank, which is provided with a replenishment port 2 at one end of its upper surface, through which liquid fuel 3 can be replenished. A suction pipe 4 penetrates the upper surface of the tank 1 into the tank 1, and its lower end 5 opens above the tank bottom surface 6 by a distance L, and the lower end 5 has a pipe longer than the distance L. Connect the extension pipe line 7.

According to the embodiment shown in FIGS. 1 to 3, the extension pipe line 7 has a vertically elongated main body part 9 with a hollow internal passage 8, and the open lower end of the main body part 9 is in contact with the tank bottom surface 6. A suction port 11 is provided between the facing base plates 10. On the outer peripheral surface of the lower end of the main body part 9, four vertical plates 12, which extend around the periphery of the suction port 11 and serve as restraint members, are radially provided. The vertical plates 12 are formed with spring support parts 13 that protrude in a direction perpendicular to the internal passage 8, and the lower ends of the vertical plates 12 are formed with the base plates 1.
It is fixed at 0.

On the other hand, a shallow receiving part 15 with a large diameter into which an O-ring 14 is fitted is formed at the upper end of the main body part 9, an annular bulging part 16 is formed on the outer periphery of the receiving part 15, and a bulging part 17 is formed in the cap 17. A plurality of inwardly directed claw portions 18 that engage with the lower end of the portion 16 are extended.

Then, the coil spring 19 is stored in the internal passage 8, the O-ring 14 is fitted into the receiving part 15, the cap 17 is attached from the end, and the bulging part 16 of the receiving part 15 is fitted.
The cap 17 is assembled by snap-engaging the claw portion 18 of the cap 17 to the lower end of the cap. Next, the lower end 5 of the suction pipe 4 is pushed in from the open upper end of the extension pipe line 7 against the bias of the coil spring 19, and the lower end 5 of the suction pipe 4 is placed at a required height position with respect to the tank bottom surface 6. Just fix it. In this state, the coil spring 19 is attached to the lower end 5 of the suction pipe 4.
and the spring support portion 13 of the vertical plate 12 are in an elastically contracted state.

Therefore, the extension pipe line 7 is always urged toward the tank bottom surface 6 by the coil spring 19, and the base plate 10 is brought into contact with the tank bottom surface 6.
If the pump (not shown) is operated in this state, the fuel 3 will be transferred to the suction port 11 located along the tank bottom 6.
It flows into the internal passage 8 from the inside, and is sucked up from the lower end 5 of the suction pipe 4 through the internal passage 8.

On the other hand, when the tank bottom 6 is displaced due to a change in internal pressure or an external impact, the coil spring 16 expands and contracts and moves up and down the extension pipe 7 to absorb the displacement of the tank bottom 6, and the suction pipe 4 is fixed at a fixed position. does not change. That is, when the tank bottom surface 6 rises upward,
The base plate 10 of the extension pipe 7 is connected to the tank bottom 6
, and the extension pipe 7 moves upward against the coil spring 19 with the base plate 10 in contact with the tank bottom surface 6. In addition, the tank bottom 6
When the tank expands downward, the coil spring 19 expands and the extension pipe 7 moves downward with the base plate 10 in contact with the tank bottom 6.

Therefore, since the suction port 11 of the extended pipe line 7 also moves up and down in accordance with the displacement of the tank bottom surface 6, the suction port 11 is always maintained at a low position along the tank bottom surface 6. Therefore, the fuel 3 can be sucked up from the tank bottom 6 regardless of the displacement of the tank bottom 6.

Furthermore, if a relatively large foreign object enters the tank 1 from the fuel supply port 2, such as a piece of duct tape, a piece of cloth, or a stopper of a bottle or can containing soft drinks, etc., the foreign object enters the tank 1. Along with suction, suction port 1
It is attracted in one direction. However, since vertical plates 12 are provided radially around the suction port 11, the foreign matter can be absorbed by the vertical plates 12.
... prevents it from entering the suction port 11.
Therefore, even if the foreign object enters the tank 1, the fuel 3 can be sucked up without taking it out, and even if the foreign object is interposed between the adjacent vertical plates 12, , it is possible to continue drawing up the fuel 3 from between the other vertical plates 12 without any hindrance.

FIG. 4 shows a second embodiment of the present invention, in which an inlet 11 is opened between the tank bottom 6 and the lower end of the main body 9, and a vertical plate 12 is disposed around the inlet 11. ... are integrally formed with a cylindrical boss portion 20 fixed to the outer peripheral surface of the main body portion 9. According to this embodiment, the lower end of the vertical plates 12...
Since it is in direct contact with the tank bottom 6 without going through the base plate 10 as in the previous embodiment, the inlet 1
1 can be brought closer to the tank bottom 6,
Therefore, it is possible to increase the maximum amount of fuel that can be supplied to the engine relative to the capacity of the fuel tank 1.

FIG. 5 shows a third embodiment of the present invention, in which a cylindrical boss portion 2 is fixed to the outer peripheral surface of the main body portion 9.
0, a rod 23 consisting of a first joint part 21 extending obliquely downward in the radial direction of the cylindrical boss part 20 and a second joint part 22 hanging down from the tip of the first joint is constructed from the above embodiment. A large number of them are provided to form a wall member. According to this embodiment, since a gap is secured between each second joint portion 22 and the suction port 11, even if a foreign object is present between the adjacent rods 23, the fuel 3 can be removed from the entire periphery of the suction port 11. can be sucked up,
This makes it possible to suppress an increase in suction resistance caused by the presence of foreign matter. In addition, in the second and third embodiments, the lower end portion of the coil spring 19 is connected to the main body portion 9.
Of course, a flange or the like is provided inside for support.

Effects In summary, according to the present invention, the suction port of the extension pipe can be placed at a low position along the bottom surface.
Fuel can be sucked up from a low position relative to the bottom of the tank, allowing effective use of tank capacity. Furthermore, even if the tank bottom is displaced, the extension pipe expands and contracts in the vertical direction according to the displacement of the tank bottom, so the height position of the extension pipe inlet is always maintained at a constant level with respect to the tank bottom. Not only can the amount of fuel remaining in the tank be kept constant, but even if there is a vertical error in the installation position of the suction pipe, the height position of the suction port can be maintained constant, and the suction pipe can be Design and installation become significantly easier. Furthermore,
Since the suction port of the extension pipe is located low along the bottom of the tank, the minimum level of fuel that can be drawn up by the suction pipe is low, making it possible to reduce the amount of replenishment fuel even when refilling an empty tank. It is highly economical as it can be reduced. In addition, since a plurality of barrier members are arranged approximately radially around the inlet, in the event that a relatively large foreign object enters the tank, the inlet can be prevented from being blocked by the foreign object, preventing any hindrance. It is possible to continue supplying fuel without any problems.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
Fig. 2 is an external perspective view of the same embodiment, Fig. 3 is a sectional view of the fuel tank, Fig. 4 is a perspective view showing the second embodiment of the present invention, and Fig. 5 is a third embodiment of the present invention. It is a perspective view showing an example. 1... Fuel tank, 4... Suction pipe, 6... Tank bottom, 7... Extension pipe, 11... Inlet, 12
... Vertical plate (Jiyama member), 23... Rod (Jiyama member).

Claims (1)

[Scope of utility model registration request] In a fuel suction device for an automobile fuel tank, in which a suction pipe is provided that enters the fuel tank of the automobile from above, and the lower end of the suction pipe is separated upward from the bottom of the tank, the lower end of the suction pipe is An extended conduit that is inserted and longer than the distance between the lower end of the suction pipe and the bottom of the tank is provided so as to be movable up and down, and the inlet is placed near the bottom of the tank around the inlet at the tip of the extended conduit. A plurality of barrier members capable of holding the suction pipe and restricting the inflow into the suction port are arranged approximately radially, and are installed inside the extension pipe, and are connected to the lower end of the suction pipe and the extension pipe or the barrier members. A fuel suction device for a fuel tank for an automobile, characterized in that an elastic body is provided between the extension pipes to urge the extension pipe toward the bottom of the tank.