JPS60139529A - Internal functioning component part attaching structure in fuel tank - Google Patents

Abstract

PURPOSE:To enhance the utility of a lid and a feed pipe for various purposes, by fitting a feed pipe through the lid for blocking an access hole formed in the upper wall of a tank body, and as well by forming the section of the feed pipe projecting from the back surface of the lid, in a rectilinear shape. CONSTITUTION:The projecting section 6a of a feed pipe 6 is formed in a rectilinear and relatively short shape so that the welding work of the pipe 6 at the end edge of a boss section 5a of a lid 5 may be facilitated. Further since this projecting section 6a is connected with a feed pump 8 which is a functioning component part at the front end of the feed pipe 6, through a resilient tube 15, even if the position of this feed pump 8 is shifted greatly from the position of the access hole 4, inter alia, the position where the lid is pierced with the feed pipe 6, the resilient tube 15 may be connected therebetween, absorbing the positional shift. With this arrangement even if the kind or specification of a vehicle is altered, it may be sufficient to change the position of an attaching stay 7, and therefore, the assembly of the lid 5 and feed pipe 6 may be commonly used for various kinds of vehicles, thereby this assembly may be widely used for various purposes.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a structure for mounting internal functional parts of a fuel tank mounted on a vehicle such as an automobile.

As is well known, the fuel tank of a conventional functional automobile has internal functional parts such as a fuel strainer, feed pump, etc. at the end of the feed pipe, as well as a fuel gauge unit, remaining amount detector, etc., as is well known. Generally, in order to install these internal functional parts, a feed pipe is passed through and installed in a lid that closes a working hole made in the upper wall of the tank body, and a stay is fixed to the back of this lid. The various functional parts mentioned above are attached to the structure so that it can be suspended and supported. The various internal functional parts mentioned above are often placed at positions offset from the center of the tank body in consideration of the influence of fuel liquid movement when the vehicle turns, but on the other hand, the working holes in the upper wall of the tank body are The position of the side nursing hall,
Depending on the piping layout that connects the feed pipe fixed to the lid to the fuel supply system, the harness layout for electrical components such as the fuel gauge unit and remaining amount detector, it may not always be installed at the most suitable location on the upper wall of the tank body. It is normal that it is not done. For this reason, the feed pipe is often bent and protruded in a complicated manner so that the tip of the pipe reaches a set position on the surface side of the lid in accordance with the lid installation position, which varies depending on the vehicle type and specifications. This feed pipe is fixed by welding to the periphery of the boss part that is bent and formed on the back side of the lid, but as mentioned above, if the protruding part of the feed pipe is formed into a complicated bend, the bent part of the feed pipe becomes This can cause problems that get in the way and make welding work very difficult.Also, as mentioned above, depending on the car model,
The bending condition of the feed pipe varies depending on the specifications, so
The lid, feed pipe, and assembly are specialized parts and are not versatile, which is a major factor in increasing costs.

On the other hand, in addition to these problems, since various internal functional parts are suspended and supported by stays fixed to the lid, these functional parts are installed with the upper wall of the tank body as a reference, which causes the following problems. occurs. That is, the tank body is constructed by butting and joining the upper shell and the lower V-well, so when various functional parts are installed with the upper wall of the tank body as a reference as described above, the upper and lower shells Due to the accumulation of molding errors in the tank, molding errors in the lid and stay, assembly errors, etc., it is difficult to uniformly determine the positions of various internal functional parts in the tank as designed. Also,
Even if the positions of these functional parts in the tank are determined as designed, it is impossible to deal with the case where the bottom wall of the tank body is deformed due to road surface interference or the like. As a result, the fuel level height detection by the fuel gauge unit and the remaining amount detection by the remaining amount detector cannot be accurately detected, or the fuel suction port of the feed pump or feed pipe is too far away from the bottom wall of the tank body. , a problem arises in that a large amount of fuel remains unsucked.

Therefore, as in, for example, Japanese Utility Model Application Publication No. 52-30154 and Japanese Utility Model Application Publication No. 58-119419, it has been proposed that the tanker functional parts are urged toward the upper wall of the tank body by means of pressure. In addition, the lid/feed pipe assembly is not versatile because it is a special part, and the protrusion on the back side of the feed pipe lid is complicatedly bent, making it difficult to weld the pipe penetration part. It's a waste of time.

Purpose of the Invention In view of the conventional situation, the present invention is capable of increasing the versatility of a lid/feed pipe assembly, making it easy to weld the feed pipe penetrating portion, and furthermore making it possible to weld the functional parts inside the tank. It is an object of the present invention to provide a structure for mounting internal functional parts of a fuel tank in which the mounting reference can be set on the bottom wall of the tank body.

Structure of the Invention In order to achieve the above-mentioned object, in the present invention, a feed pipe is penetrated and fixed to a lid that closes a working hole provided in the upper wall of the link main body, and a protrusion on the back side of the feed pipe is provided. is formed in a straight shape, and the feed pipe tip functional component, which is connected to the protrusion and is urged toward the bottom wall of the tank body by the pressure means, can freely slide up and down on the protrusion with its mounting stay. The protrusion is used as a sliding guide.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1 shows an in-tank pump type fuel tank to which the present invention is applied. In the figure, 1 indicates the tank body, and the upper wall 2 of this tank body 1 is used for work to arrange various internal functional parts. A hole 4 is formed therein. Reference numeral 5 denotes a lid that closes the working hole 4, and this lid 6 has a boss portion 5a protruding from the back side through which the feed vibro is disposed, and the feed vibro is inserted into the boss portion a. , boss portion 5a
The edges are fixed by welding. The protruding portion 6a from the boss portion 5a of the feed vibro is formed straight and relatively short to a length that does not interfere with the connection of an elastic tube 15, which will be described later. 1 is the installation stay for functional parts inside the tank,
This stay 1 is equipped with internal functional parts such as a feed pump 8, which is a functional part at the end of a feed pipe, a fuel gauge unit 8, and a remaining amount detector 10. A bracket 11 having a U-shaped side surface is fixed to the upper end of the mounting stay 1, and a mounting hole 111K formed approximately in the center of the bracket 11 is inserted into the protrusion 61 and lowered to the protrusion 6m. It is held and supported so that it can be moved freely, and the protrusion 6a is used as a sliding guide. Further, a notch 11b is provided at the tip of the bracket 11, and a stopper piece 12 fixed to the face of the lid 5 is engaged with this notch 11b to prevent rotation. Then, between the lid 5 and the bracket 11, a coil spring 14, for example, is elastically loaded as a pressure means 13 around the feed pipe protrusion 6a, and the stay 1 is integrated with the feed pump 8 etc. on the side of the bottom wall 3 of the tank body. The lower end of the stay 1 is elastically contacted and supported by the bottom wall 3 of the tank body. The protrusion 6a and the discharge port 8m of the feed pump 8 are connected to an elastic tube 15 made of rubber, resin, etc.
It is connected for communication.

Here, instead of elastically contacting and supporting the lower end of the mounting steerer with the tank body bottom wall 3, the feed pump 8 is elastically contacted with the tank body bottom wall 3 as shown in FIG.

It may be supported. Even in the case of collapse, it is desirable to insert an insulator IB in order to prevent abnormal noise from occurring due to direct contact with the bottom wall 3 of the tank body.

Instead of the coil spring 14 being elastically mounted between the lid 5 and the bracket 11 as described above, as the pressure means 13, as shown in FIG. A coil spring 11 may be stretched between them.

Furthermore, in place of the coil springs 14' and 17, a leaf spring 18 may be used as shown in FIG. 4. Leaf spring 18 dogleg shape or U
It is formed into a letter shape and is elastically mounted between the bracket 11 and the back surface of the lid device to urge the stay T downward.

A protruding piece 18a is bent at the tip of the lower side of the leaf spring 18, and the protruding piece 18m is inserted into the notch 1 at the end of the bracket 11.
1b, a notch 18b is formed at the top end of the leaf spring 1B, and a protrusion 19 fixed to the lid 5 is engaged with this notch 18b to prevent rotation of the stayer and the leaf spring 1B. It is stopping its own rotation. 8c in FIGS. 1 and 2 indicates a twist strainer provided at the suction port 8b of the feed pump 8.

According to the structure of the above embodiment, the protruding portion 651 of the feed vibro is formed straight and relatively short, so that welding work at the edge of the boss portion 5a can be performed very easily. The protruding portion 6a and the feed pump 8, which is a functional component at the end of the feed pipe, are connected to the elastic tube 15.
Since the feed pump 8 is connected at
Even if the forming position of the working hole 4, especially the position where the lid 5 passes through the feed pipe, is greatly deviated, the elastic tube 1
5 can be freely communicated and connected without causing any problems. Therefore, even if the working hole 4 in the upper wall 2 of the tank body and the installation position of the feed pump 8 are different depending on the vehicle model and model, the lid 5 and feed pipe 6 can be easily installed by simply changing the mounting stay. This makes it possible to share the assembly and widen the versatility.

On the other hand, the protruding part 6a on the rear side of the lid of the feed vibro is formed in a straight shape as described above, and serves as a sliding guide for the bracket 11 of the mounting stayer, and serves as a sliding guide for the feed pump 8, fuel gauge unit 9, etc. Internal functional parts such as the remaining amount detector 10 are mounted so as to be movable up and down with respect to the lid 5, and
The lower end of the stayer or the feed pump 8 is in elastic contact with the tank body bottom wall 3 because it is biased toward the tank body bottom wall 3 side by the coil spring 14 or 11 or leaf spring 18 or other elastic pressure means 13, so that the tank body 1 Even if there are molding errors, molding errors of the lid 5 and stayer, and assembly errors, these errors are absorbed and the suction port 8b of the feed pump 8, the remaining amount detector 10, and the fuel gauge unit 9
The position from the bottom wall 3 of the tank body can be kept constant.

Therefore, the amount of unsuction from the feed pump 8 does not increase, and on the contrary, the feed pump 8 is moved to the bottom wall of the tank body 3 without taking into account the deformation of the bottom wall 3 of the tank body due to interference with the road surface.
Even if it is installed close to or grounded, the bottom wall of the tank body 3
When the tank body 1 is deformed, it can be absorbed by the movement of the stay 1, so that the fuel suction limit by the feed pump 8 is expanded, and there is an advantage that the effective effective volume of the tank body 1 can be expanded. Furthermore, fuel measurement by the fuel gauge unit 8 and remaining amount detector 10 is performed by measuring the level of fuel from the bottom wall 3 of the tank body.
Since the heights of the gauge unit 9 and the detector 10 from the tank body bottom wall 3 are constant regardless of molding errors of the tank body 1, etc., accurate measurements can be performed.

The above is an example of an in-tank pump type fuel tank, but in the case of a general type fuel tank in which the feed pump is installed outside the tank body, a twer strainer 21 is attached to the mounting steerer as shown in Figure 5. Attachment: The suction pipe 21m of this Tsuyuel strainer 21 and the feed pipe protrusion 8a are connected with the elastic tube 15. Further, in this embodiment, an elastic tube 15 is effectively utilized as the pressure means 13, and the elasticity of the elastic tube 15 urges the strainer 21 together with the mounting stay 1 toward the bottom wall 3 of the tank body. I'm trying to get the same effect. As the elastic tube 15, as shown in FIG. 6, a coil spring 15m embedded therein to increase the spring force may be used.

In particular, in the embodiments shown in FIGS. 1 and 7, each of the functional parts 8, 9, and 10 extends between the lid 5, in other words, the tank body top wall 2, and the tank body bottom wall 3. It is supported by the provided feed pipe protrusion 6a and the mounting stay 1, and is urged toward the tank body bottom wall 3 side by the compression means 13, so that the mounting stability is excellent and reliable mounting can be performed. It can be done.

In addition, in the above-mentioned side embodiment, the stopper piece 12 fixed to the lid 5 is used to prevent the rotation of the mounting stayer, but in addition to this, as shown in Fig. Specifically, other pipes 22 such as return pipes or evaporator pipes are penetrated and fixed at intervals that do not interfere with welding work, and the cutout 11b of the bracket 11 is engaged with this pipe 22. The pipe 22 can be effectively used as a stopper. However, in this case, it goes without saying that the protrusion 22m of the cough pipe 22 on the back side of the lid 5 is formed in a straight shape so as not to hinder the welding operation with the edge of the boss portion 5b of the pipe 22.

Effects of the Invention As described above, according to the present invention, since the protrusion on the back side of the lid of the feed pipe is formed in a straight shape, during welding work of the feed pipe penetrating portion on the back side of the lid, This has the advantage that the work can be done easily without the protrusion getting in the way.

In addition, even if the feed pipe protrusion and the feed pipe end functional component are largely offset in the front-rear or left-right direction, it is sufficient to change the bending shape, length, etc. of the simple structure of the mounting stay. capable of responding, therefore,
Even if the working hole on the top wall of the rank body and the placement position of the feed vibe tip machine parts vary depending on the vehicle model and specifications, the lid and feed pipe assembly can be shared, increasing versatility. It has great practical effects.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a sectional view showing different examples of feed pump support, Figs. 3 and 4 are sectional views showing different examples of the pressure means, and Fig. 5. 6 is a sectional view showing a different example of the feed pipe tip functional component, FIG. 6 is a sectional view showing a different example of the elastic tube, and FIG. 7 is a sectional view showing a different example of the rotation prevention structure of the mounting stay. 1...tank body 2...tank body upper wall 3...
Tank body bottom wall 4... Working hole 5... Lid 6.
...Feed Vibro m...Protruding part 1...Mounting stay 8.21...Feed pipe tip functional part 13.
... Repression means 15 ... Elastic tube Fig. 3 Fig. 4

Claims (1)

[Claims] (1) A feed pipe is fixed through a lid that closes a working hole provided in the upper wall of the tank body, and a protrusion on the back side of the lid of the feed pipe is formed in a straight shape. , and the feed pipe end functional component, which is urged toward the bottom wall of the tank body by the pressure means, is held and supported by its mounting stay on the protrusion so as to be slidable up and down, and the protrusion is slidably guided. A fuel tank internal functional parts mounting structure characterized by: