JPH059491Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fuel tank device having a fuel pump suitable for use in an electronically controlled fuel injection device of an automobile, etc. The present invention relates to a fuel tank device having a fuel pump that can prevent a filter from falling off from a pump body when the pump is attached.

[Prior art]

FIGS. 3 to 6 show a fuel tank device with a prior art fuel pump.

In the figure, reference numeral 1 indicates a fuel tank mounted on the rear side of an automobile, etc. A circular pump mounting hole 1A is bored on the top side of the fuel tank 1, and a hole 1A is formed around the pump mounting hole 1A. As shown in Figure 6,
Screw holes 1B, 1B,... are arranged at predetermined intervals in the circumferential direction.
... are drilled in each. A bracket 5, which will be described later, is placed around the pump mounting hole 1A and is screwed into each screw hole 1B. Further, fuel F such as gasoline is supplied and stored in the fuel tank 1 through a fuel filler port (not shown).

2 indicates a fuel pump, 3 indicates a pump body of the fuel pump 2, and the pump body 3 has a pump mounting hole 1A.
The fuel tank 1 is inserted into the fuel tank 1, and is positioned so as to be immersed in the fuel F by means of a bracket 5 and the like. The pump main body 3 has a built-in motor section 3A and a pump section 3B, and the fuel F sucked in from the filter 9 side, which will be described later, is delivered to a discharge pipe 4.
It is designed to be supplied under pressure to an external injection valve (not shown) or the like via the injector.

5 is a stem 6, 6,... on the upper side of the pump body 3.
The bracket 5 is provided with a flange portion 5A on the outer circumferential side thereof, and the flange portion 5A is provided with positions corresponding to the screw holes 1B of the fuel tank 1. screw 7,
7, ... are inserted through the screw holes 5B, 5, respectively.
B,... are drilled. The bracket 5 is placed around the pump mounting hole 1A to cover the pump mounting hole 1A, and by screwing the screw 7 into each screw hole 1B through each screw hole 5B, It is designed to be fixed as shown in FIG. Further, the discharge pipe 4 passes through the bracket 5 and projects to the outside of the fuel tank 1.

Reference numeral 8 indicates a suction pipe bent into an L shape, which is provided on the lower end side of the pump body 3, and the base end 8A of the suction pipe 8 is connected by fitting into the suction port (not shown) of the pump body 3. and the fifth one is on the tip side.
As shown in the figure, a flexible hose 10, which will be described later, is fitted and connected. A pair of protrusions 8 protrude to the left and right on the tip side of the suction pipe 8.
B, 8B are provided, and rectangular engagement holes 8C, 8C are bored in each protrusion 8B. Also,
Each engagement hole 8C is provided on the inner periphery of the tip side of the suction pipe 8.
An annular step portion 8D for positioning an O-ring 11, which will be described later, is formed closer to the base end side 8A than the above.

9 is a filter that removes dust etc. from the fuel F sucked into the pump body 3; 10 is the filter 9;
A flexible hose is shown in which the filter 9 is removably connected to the distal end of the suction pipe 8, and the flexible hose 10 is supported by the spring load of a spring 12, which will be described later, as shown in FIG. The middle portion thereof is formed into a bellows shape so as to be bendable, and engagement protrusions 10A, 10A that removably engage with the respective engagement holes 8C of the suction pipe 8 are provided protruding from the tip side. When the distal end side of each flexible hose 10 is fitted into the suction pipe 8, the engagement projections 10A engage with the engagement holes 8C, thereby preventing the distal end from coming off.
When replacing the filter 9, etc., by twisting the flexible hose 10 with respect to the suction pipe 8, the engagement between each engagement protrusion 10A and each engagement hole 8C is released, and the flexible hose 10 is replaced with the filter. 9 can be attached and detached from the suction pipe 8.

Reference numeral 11 indicates an O-ring attached to the outer peripheral side of the tip of the flexible hose 10, and as shown in FIG. 8 and the flexible hose 10.

Further, reference numeral 12 denotes a spring that presses the filter 9 against the bottom surface 1C of the fuel tank 1 in order to suck the fuel F to the end.
It is hooked in a wound state to each of the protrusions 8B, and its one end side 12B is in contact with the proximal end side 8A of the suction pipe 8, and the other end side 12C is in contact with the filter 9, respectively. The spring 12 is adapted to press the filter 9 in the direction of arrow A so as to tilt it downward, as shown in FIG. 4, until the pump body 3 is installed in the fuel tank 1.

The prior art is constructed as described above, and when installing the pump body 3 of the fuel pump 2 into the fuel tank 1, first insert the pump body 3 together with the filter 9 etc. into the fuel tank 1 through the pump installation hole 1A, In order to press the filter 9 against the bottom surface 1C of the fuel tank 1 against the spring 12, the bracket 5 is pressed in the direction of arrow B as shown in FIG.
After the flange portion 5A is brought into contact with the circumference of the pump mounting hole 1A, the bracket 5 is appropriately rotated together with the pump body 3 etc. in the direction of arrow C to align each screw hole 5B and each screw hole 1B. Align each screw 7 with the
The bracket 5 is screwed onto the upper surface of the fuel tank 1 by screwing as shown in the figure.

Next, in this state, a fuel supply pipe (not shown) is connected to the protruding end side of the discharge pipe 4, and the pump body 3 is
When power is supplied from the outside to the motor section 3A, the pump 3B is rotationally driven by the motor 3A, and the fuel F in the fuel tank 1 is sucked into the pump body 3 through the filter 9, and the fuel is discharged from the discharge pipe 4. It is supplied under pressure to an injection valve or the like via a supply pipe or the like.

Since the filter 9 is pressed in the direction of arrow A in FIG. 1 by the spring 12, it is constantly pressed against the bottom surface 1C of the fuel tank 1, and even when the remaining amount of fuel is sucked into the pump body 3.

[Problem that the invention attempts to solve]

By the way, in the above-mentioned conventional technology, the filter 9
When the flexible hose 10 integrated with the flexible hose 10 is fitted into the suction pipe 8, each engaging protrusion 10A engages with each engaging hole 8C, as shown in FIG. However, in order to facilitate replacement of the filter 9, the engagement is easily released by twisting the flexible hose 10 together with the filter 9. and,
Since the spring 12 constantly presses the filter 9 in the direction of arrow A, the spring 12 applies a spring load to the flexible hose 10 in the direction of pulling it out from the suction pipe 8. Further, the O-ring 11 attached to the outer peripheral side of the tip of the flexible hose 10 is elastically deformed between it and the stepped portion 8D of the suction pipe 8, and an elastic force is applied to the flexible hose 10 in the direction of pulling it out from the suction pipe 8. is working.

Therefore, in the prior art, in order to install the pump body 3 inside the fuel tank 1, the bracket 5 is pressed in the direction of arrow B in FIG. Since the filter 9 is pressed against the bottom surface 1C of the fuel tank 1 by the spring 12 when aligning with the hole 1B,
The rotational force in the direction of arrow C acts in a direction to twist the flexible hose 10 with respect to the suction pipe 8 via the filter 9, and the rotational force acts in a direction to twist the flexible hose 10 with respect to the suction pipe 8, and the rotational force acts on the flexible hose 10 through the filter 9 in a direction that twists the flexible hose 10 with respect to the suction pipe 8.
There is a drawback that the filter 9 may accidentally fall off from the pump body 3 due to the spring load of the spring 12 acting on the flexible hose 10 and the elastic force of the O-ring 11. be.

The present invention was developed in view of the above-mentioned drawbacks of the conventional technology.The present invention makes it easy to align the screw holes on the bracket side with the screw holes on the pump mounting hole side when installing the pump body in the fuel tank. The present invention provides a fuel tank device having a fuel pump that can reliably prevent accidents such as filter falling off.

[Means for Solving the Problems] The feature of the configuration adopted by the present invention in order to solve the above-mentioned problems is that the upper side of the fuel tank protrudes upward from around the pump mounting hole, and the upper end side is equipped with a jig. A plurality of positioning protrusions are provided as L-shaped bent parts that engage with the pump, and the bent parts of the respective positioning protrusions are inserted into the bracket, and each screw hole on the bracket side is connected to each screw hole on the pump mounting hole side. A plurality of alignment holes are drilled to be aligned with the screw holes, and with the bent portions of each alignment protrusion protruding from each of the alignment holes, each of the bent portions and each alignment hole of the bracket are drilled. The bracket is temporarily positioned around the pump mounting hole by engaging a jig with the periphery and pressing the filter against the bottom surface of the fuel tank against a spring.

[Effect]

With the above configuration, when installing the pump body of the fuel pump into the fuel tank, each positioning protrusion can be inserted into each positioning hole of the bracket, and the bent part of each positioning protrusion can be made to protrude from each positioning hole. For example, each screw hole on the bracket side can be automatically aligned with each screw hole on the pump mounting hole side. In this state, if a jig is engaged between the bent part of each positioning protrusion and the periphery of each positioning hole of the bracket, the filter will be pressed against the bottom of the fuel tank against the spring, and the bracket will be pressed against the bottom of the fuel tank. can be pressed around the pump mounting hole of the fuel tank, eliminating the need to manually press the bracket around the pump mounting hole during screw tightening work.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. In the embodiment, the same components as those in FIG. 3 described above are given the same reference numerals, and their explanations will be omitted.

In the figure, 21 indicates a fuel tank, and this fuel tank 21 is formed almost in the same way as the fuel tank 21 described in the prior art, and a circular pump mounting hole 21A is bored in the upper surface side of the fuel tank 21. Around 21A are screw holes 21B and 21 into which each screw 7 is screwed.
B,... are drilled. However, a pair of alignment protrusions 22, 22 are provided on the fuel tank 21, located around the pump mounting hole 21A, and projecting upward so as to face each other in the diametrical direction. Here, each of the protrusions 22 is formed by bending a thick steel wire or the like into an L-shape, and the bent portions 22A thereof are oriented in the same direction. Each projection 22 is inserted into each alignment hole 23C, which will be described later, so that each screw hole 21B is aligned with each screw hole 23B, which will be described later.

23 is a stem 6, 6,
...shows a bracket attached via etc.
The bracket 23 is formed almost in the same way as the bracket 5 described in the related art, and is provided with a flange portion 23A on its outer circumferential side, and has screw holes 23B, 23B, . . . into which each screw 7 is inserted.
... has been drilled. However, the bracket 23
A pair of alignment holes 23C, , 23C are formed in the shape of an elongated rectangle at positions corresponding to the respective protrusions 22 of the fuel tank 21. Here, each alignment hole 23C is formed so that its width corresponds to the thickness of each protrusion 22, and its length corresponds to the length of each bent portion 22A, and there is no space in each alignment hole 23C. As shown in FIG. 2, each protrusion 22 is inserted through it. When the bracket 23 is pressed around the pump mounting hole 21A, the bent portion 22A of each protrusion 22 projects upward from each alignment hole 23C, and each screw hole 23B aligns with each screw hole 21A.
It is automatically aligned to B.

Furthermore, 24 connects the bracket 23 to the fuel tank 2.
A jig for temporary positioning is shown on the upper surface side of the jig 24, and on the distal end side of the jig 24, forked portions 24A are formed in a substantially U-shape and spaced apart by a predetermined distance corresponding to between the respective protrusions 22. A pair of downwardly inclined claw portions 24B, 24B are formed on the distal end side of the forked portion 24A. By pushing the jig 24 in the direction of arrow D in FIG. 2, each claw portion 24B is engaged between the bent portion 22A of each protrusion 22 and the upper surface of the flange portion 23A around each alignment hole 23C. The filter 9 is attached to the bottom of the fuel tank 21 by the spring 12.
This structure facilitates the operation of screwing each screw 7 into each screw hole 21B aligned with each screw hole 23B.

The fuel tank device according to this embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art.

However, in this embodiment, a pair of positioning protrusions 22 are provided around the pump mounting hole 21A of the fuel tank 21.
The bracket 23 has a pair of alignment holes 2 at positions corresponding to the respective protrusions 22.
3C, when inserting the pump body 3 from the pump mounting hole 21A and installing it in the fuel tank 21, align each protrusion 22 with each positioning hole 23C.
Each screw hole 23B of the bracket 23 can be automatically aligned with each screw hole 21B by simply inserting the bracket 23 into the inside. There is no need to rotate the filter 23, it is possible to prevent twisting force from acting on the filter 9 and the flexible hose 10, and the problem of the filter 9 falling off can be solved.

Also, when screwing the bracket 23 onto the upper surface of the fuel tank 21, each claw portion 2 of the jig 24
4B to the bent portion 22A of each protrusion 22 and the bracket 2.
The flange portion 23 of the bracket 23 can be easily inserted and engaged between the upper surface of the flange portion 23A of the bracket 23 and the upper surface of the flange portion 23A of the bracket 23
The lower surface of A can be maintained in a pressed state around the pump mounting hole 21A of the fuel tank 21, and the filter 9 can be pressed against the bottom surface of the fuel tank 21 against the spring 12. In this state, there is no need for the operator to press the bracket 23 downward with his or her hands, and each screw 7 can be easily screwed into each screw hole 21B through each screw hole 23B, and the bracket Various effects can be achieved, such as greatly simplifying the screw-fastening work of 23.

In the above embodiment, the L-shaped alignment protrusions 22 are provided around the pump mounting hole 21A of the fuel tank 21, but the alignment protrusions 22 do not necessarily have to be L-shaped. For example, it may be formed into a U-shape. In this case, each U-shaped protrusion is inserted into each positioning hole 23C of the bracket 23 and projected, and the U-shaped protrusion and the flange portion 2 of the bracket 23 are connected to each other.
The bracket 23 may be temporarily positioned by inserting a flathead screwdriver or the like between it and the upper surface of the bracket 3A.

[Effect of idea]

As detailed above, according to the present invention, a plurality of positioning protrusions having an L-shaped bent portion on the upper side are provided around the pump mounting hole of the fuel tank, and a plurality of positioning holes are drilled in the bracket. Because I set it up,
When installing the pump body into the fuel tank, by inserting the bent parts of each positioning protrusion into each positioning hole and protruding, each screw hole of the bracket will automatically fit into each screw hole on the pump mounting hole side. The position can be aligned, and there is no need to rotate the bracket together with the pump body. Then, in this state, by engaging the jig between the bent part of each positioning protrusion and the bracket, the bracket will be pressed around the pump mounting hole while the filter is pressed against the bottom of the fuel tank. This not only simplifies the subsequent screw-fastening work, but also effectively prevents accidents such as the filter falling off, and greatly improves workability during installation.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Figure 1 is a perspective view of the main parts showing the state in which the fuel pump is inserted into the fuel tank, Figure 2 is a perspective view of the main parts showing the state in which the bracket is screwed to the fuel tank, and Figures 3 to 6. indicates the prior art, and the third
The figure is a vertical sectional view of the fuel tank with the fuel pump attached, FIG. 4 is a front view showing an enlarged lower part of the fuel pump before installation, and FIG. 5 is a sectional view in the direction of the − arrow in FIG. 4. FIG. 6 is a perspective view of main parts showing a state in which the fuel pump is inserted into the fuel tank. 3... Pump body, 7... Screw, 8... Suction pipe, 9... Filter, 10... Flexible hose, 12... Spring, 21... Fuel tank,
21A...Pump mounting hole, 21B...Screw hole, 2
2...Positioning protrusion, 23...Bracket, 2
3A...flange part, 23B...screw hole, 23C
...Positioning hole, 24...Jig.

Claims (1)

[Scope of utility model registration request] A fuel tank having a pump mounting hole formed on its upper surface side, a pump body inserted into the fuel tank through the pump mounting hole, and a pump body mounted on the upper side of the pump body and formed around the pump mounting hole. A fuel tank device having a fuel pump comprising a bracket screwed into each screw hole through each screw, and a filter detachably attached to the lower end side of the pump body and pressed against the bottom surface of the fuel tank by a spring. In the fuel tank, a plurality of positioning protrusions are provided on the upper surface side of the fuel tank, projecting upward from the periphery of the pump mounting hole, and having an L-shaped bent portion whose upper end side engages with a jig, and the bracket A plurality of positioning holes are formed through which the bent portions of the positioning protrusions are inserted, and each screw hole on the bracket side is aligned with each screw hole on the pump mounting hole side, and With the bent portions of each positioning projection protruding, a jig is engaged between each bent portion and the periphery of each positioning hole of the bracket, and the filter is placed against the spring on the bottom of the fuel tank. 1. A fuel tank device having a fuel pump, characterized in that the bracket is temporarily positioned around a pump mounting hole by pressing the bracket.