JPS59168256A - Feed pump supporting structure of fuel tank - Google Patents

Abstract

PURPOSE:To improve soundproofing characteristics and increase the capacity of the tank by a method wherein the outer periphery of the feed pump is covered with a cover made of vibration insulating material and a supporting seat is extended at the lower end of the cover while the pump is held by the part of the cover through a stay secured to the rear surface of a lid. CONSTITUTION:The outer periphery of the feed pump 6 is converted integrally by the cover 20 made of vibration insulating material. The supporting seat 21, projecting downwardly lower than a strainer 9 arranged at the bottom of the feed pump 6 is extended at the lower end of the cover 20. A plurality of supporting seats are formed intermittently and respective seats are utilized as the flow path 22 of fuel. A pair of protuberances 23 are formed integrally at the upper outer periphery of the cover 20 with an interval in up-and-down direction and the stay 4 is retained between the protuberances 23. A clamp piece 25 is connected at the lower end of the stay 4 and opposing flanges 25b at the tip end of the clamp piece 25 are clamped with bolts and nuts 25c. The feed pump 6 is held by the calmp piece 25 from the outer periphery of the cover 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel tank mainly used in various vehicles, and particularly to a feed pump for an in-tank pump type fuel tank, in which a feed pump is provided with a membrane inside the tank body. 0 Prior Art Related to Support Structure For example, in an automobile fuel tank, the feed pump is generally placed outside the tank body, and the fuel in the tank is sucked in and discharged by the cough feed pump. When the fuel is drawn out, vapor tends to occur in the outlet pipe before it reaches the feed pump, which can cause paper locks and interfere with the smooth supply of fuel.

Therefore, in recent years, three feed pumps have been installed inside the fuel tank body.
A 1ft in-tank pump type fuel tank has been developed, and since the feed pump pumps fuel from within the tank body, the inner part of the outlet vibe is raised and the occurrence of leakage can be prevented. 1 is in the spotlight.

An example of this in-tank pump type fuel tank is explained with reference to Figure 1.2.
a, /'b are welded and joined at their circular flanges /a1°/b% to form a tank body, and a feed pump (to be described later) is installed in an arbitrary part of the earthen wall of this tank body with a durable working hole j. It is formed. J is a lid that closes the working hole 2 r'x, and a clamp piece 1a is attached to the lower end of the lower surface of the coffin rod J.
A stay l is fixedly connected to the outside, and an out red piston is passed through and installed. t is a feed pump, and the feed pump is held by the clamp piece 4a via a vibration isolating material 11, for example, a ring-shaped vibration isolating rubber //, and the clamp piece %t! Fasten the opposing flange 41 portions of the L tip with bolts/nuts/2, and tighten the clamp piece 4ta.
In order to prevent it from falling down, it is supported by being firmly tightened in a semi-rigidly connected state. The outlet vibrator sKmH is connected to the outlet tB of this feed pump g with an elastic hose 10 made of rubber or the like.

However, with this conventional structure, there is a problem in that the vomiting noise from the feed pump resonates outside using the tank body as a sounding body. 9. Due to the need to suspend the feed pump B inside the tank body with a stay, the stay Q, lid,
? Considering the molding error, assembly error, etc. of the clamp piece ≠ a, and so that it does not interfere with the feed pump body allowance B,
It is necessary to ensure a sufficient willow distance H between the strainer B and the strainer 9. As a precaution, there is a problem where the amount of fuel remaining in the tank increases and the actual tank capacity becomes smaller.

OBJECTS OF THE INVENTION In view of the conventional situation, an object of the present invention is to provide a feed pump support structure for a fuel tank that has excellent noise characteristics, reduces power, and can increase the actual tank capacity. be.

According to the present invention, the outer periphery of the feed pump is integrally covered with a cover made of a strainer, and a strainer at the bottom of the feed pump is attached to the lower end of the core bar. The core feed pump is held by a portion of the outer cover by a stay fixed to the back surface of the lid that closes the working hole in the upper wall of the tank body.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

In FIG. 3.4, the feed pump t is integrally covered with a cover 20 made of a vibration-proofing material, for example, vibration-proofing rubber. The lower end of the cover O extends from a support seat 2/ that protrudes below the strainer 9 on which the feed pump is disposed at the bottom.

A plurality of support seats 27 are formed intermittently, and each support seat 27
,,') between 7 and 7.2. In addition, the tip of the support seat 2/ is formed into a pressed angle shape to reduce the number of springs. A pair of protrusions 23 are integrally molded in the circumferential direction on the outer edge of the top portion of the cover 70, spaced apart from each other in the vertical direction. ! ,? , from 7JK,
Staff 1 with Stay I! :, forms a part, and is supported by a stay q between the core and the sword. Clamp pieces X and t are connected to the lower end of the stay V, and the opposing flange parts ko and tb of the two flap pieces are connected with bolts.
The clamp piece 2j is used to cover the feed pump, and the clamp piece 2j is held from the outer periphery of the clamp piece 2j. The ring-shaped clamp piece cover, 20, has a slightly larger diameter than the outer diameter of the protrusion, and its width varies approximately the same as the dimension between the protrusion, υ, and 2.1. It is formed.

The feed pump t is attached in advance to the clamp piece 2j on the protrusion υ, ? of the cover 20. Attach it to the locking part formed by J, and press the flange part of the clamp piece 8, 2! This is done by fastening b with bolts and nuts 2jc. In this example, the clamp piece of the stake on the feed pump is held loosely from 2.4 K and covered at the bottom of the tank body in the light condition: lO
The lower end support seat, l/, is placed in contact.

Therefore, according to the structure of this embodiment, the entire outer periphery of the feed pump is covered with a cover m made of anti-vibration rubber. The characteristics are very good. Nine, is the feed pump t the support seat under the cover 70 fi? Since the bottom of the tank body BKuWlt is held by /, the vibration is attenuated by this support mtt, so if the pump movement is directly transmitted to the tank body bottom B side, it will not melt. On the other hand, in this way, the feed pump does not have a negative load phase that is a hot point on the rounding and stakes that are attached to the bottom BK of the tank body through the support VJ4>t, and the core stay 4 is exclusively applied in the lateral direction and H -ti downward fII6! , the stay l has enough strength to control the force 1, and the stay l is rounded to hold the outer periphery of the cover and W in a loop, which can significantly reduce vibration transmission to the stay l side. It also has the effect of preventing vibration of the tank body/which is transmitted from the still.

9. Round the feed pump t through the support seat 11 to the bottom of the tank body BK: 9i7, the support seat? / makes it possible to keep the distance between the strainer 9 and the bottom part B of the tank body as small as possible and keep it constant by t1, thereby expanding the fuel suction limit of the rounding pump t, thereby increasing the actual tank capacity.

Here, as shown in the molded base of the support seat 2/, seven air vent holes 26 are inserted into the upper part of the strainer.
Or, if a concentrated 27 is formed, the strainer 9
Even if air bubbles are generated due to the vortex generated in the vicinity, they can be pulled out through the hole U or groove 27, making the pair of paper rods more profitable. 9. The difference in dimensions Wa between the upper and lower buttons of the stay l and the feed pump t can be absorbed by the elastic deformation of the protrusions υ and 7J, but in some cases the protrusions 2J1
．． Since the dimension between υ is shown by the chain droplet in FIG. 03, the width of the bracket 2j may be set larger than the width of the bracket 2j to absorb the error.

The space example shown in Fig. 5.6 includes the bracket of the cover jO,
Form multiple protrusions, 2&, in the radial direction on the outer 1F7I held by the 2-layer 1, and rub the core center 2t onto the ring-shaped lamp piece 2, and attach the covers y and o. A snap part 2 is integrally molded on the outer peripheral surface of the first draw, and a core snap part, 2
By attaching the clamp piece λ to the stacking tag 2ta, while holding the feed pump loosely from the C1 stay a K, it is possible to control the rotational direction and vertical direction of the feed pump t. It is intended to restrict f#J.

The embodiment shown in FIG. 7 has a cover 20 for the same purpose.
For external use in the central part of the body! While a snap part 2d is provided, an extension 11c is provided vertically at the lower end r of the stay, and this extension 11cK is designed to attach the snap part M to the tag 1d. In this embodiment, the support seat at the lower end of the cover 20? The cover, the support seat of '20), which is in contact with the bottom BK of the tank body, is rounded and covers the strainer, so that the feed pump ≦ can be brought as close to the bottom BK of the tank body as possible. Tank capacity can be increased. still,
Even in the case of this embodiment, it is often necessary to bring the support seat into contact with the bottom B of the tank body, but the effect of the present invention can be exerted even if the support seat is brought as close as possible to the bottom B of the tank body, as in this embodiment. Of course.

In addition, the retention of the feed pump t by the stay l is 11 inches,
In addition to these, for example, as shown in FIG.
While cutting and forming or protruding the locking hook part gs,
The outer periphery of the cover 220 (anchoring part, ? 2 integrally molded, locking hook part 1ef; c core w: @ part, 70
You may also assist.

In the actual example Ir'f shown in FIG. 9, the inlet 7 of the feed pump 2 is provided protruding toward the outside of the support seat)/, and a strainer 9 is provided at the end of this inlet 7 to increase the fuel suction rate. It's something like that.

Effects of the Invention As described above, the present invention has the practical advantages of improving the irregularity characteristics of the fuel tank, increasing the actual tank capacity, increasing roundness, quality, and reliability. It has great effects.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an example of a conventional structure, and Figure 2 is a cross-sectional view showing an example of a conventional structure.
3 is a cross-sectional view showing essential parts of an embodiment of the present invention; FIG. 4 is a cross-sectional view taken along line IV-■ in FIG. 3; Figure @6. is the second aspect of the present invention.
6 is a sectional view taken along line 11-■ in FIG. 5; FIG. 7 is a sectional view showing a third embodiment of the present invention;
FIG. 8 is a sectional view showing a different example of the feed pump holding portion, and FIG. 9 is a half sectional view showing a different example of the feed pump. /...Tank general, K...Work hole, J...Lid, q...Stay, t...Feed pump, De...
Strainer, 20...Cover 1, 11...Support seat,
J: Clamp piece, B: Bottom of tank body. 4 Figure 5 JP-A-59-IG825G (6) S-do

Claims (3)

[Claims] (1) A stay is fixed to the back of the lid that is formed on the upper wall of the tank body and closes the nine working holes, and the feed pump is supported by this stay, and the outer periphery of the feed pump is separated from the shell material. In addition to integrally covering the
9. A feed pump support for a fuel tank, characterized in that a support seat that protrudes below a strainer at the bottom of the feed pump is fully extended at the lower end of the cover, and the feed pump is held by a portion of the outer cover by the stay. structure. (2) In the outer circle of the cover marked with #, a locking part with a stay that restricts the vertical movement of the elbow cover is formed, and the core cover? A feed pump support structure for a fuel tank according to claim 1, wherein the support structure is loosely held by a leaf stay. (3) The feed pump support structure for a fuel tank according to claim 1, wherein the support seat is brought into contact with the bottom of the tank body.