JPH10213038A - Intank fuel pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of an oiltight part due to fatigue of the connection part of a feeding pipe and a set plate by the feeding pipe of the part extended to the discharge port of a fuel pump of the feeding pipe which is oiltightly passed through a fuel pump installed at the inside of a tank and the set plate clogging an opening by vibration, impact and engine vibration, etc., of a vehicle, etc. SOLUTION: This device has a base 13 which is provided by being floated from a set plate surface by a prescribed dimension within a fuel tank 1 by an opening leg 13b fixed to a set plate 2 and holds a fuel pump 10 and a supporter 13c which is formed integrally with this base 13 and is extended to the internal side of the fuel tank 1. The rising part, of a feeding pipe 14 is fixed to this supporter 13c and the supporter 13c and the feeding pipe 14 are joined and reinforced in a bridge shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-tank type fuel pump device for supplying liquid fuel for vehicles (hereinafter simply referred to as "fuel") to a fuel tank or an engine. The present invention relates to a structure of a fuel pump device.

[0002]

2. Description of the Related Art FIG. 6 is a side sectional view showing a conventional in-tank type fuel pump device disclosed in Japanese Utility Model Publication No. 1-37178. In the figure, reference numeral 1 denotes a fuel tank, which includes an upper surface 1a, a bottom surface 1b, and an opening 1c formed in the bottom surface 1b. Reference numeral 2 denotes a set plate on which the pump device is integrally assembled, and the opening 1c is oil-tightly closed via a packing 3. Reference numeral 4 denotes a sub-tank, which is fixed to the set plate 2. Reference numeral 5 denotes a fuel pump, which is attached to a pump holder 6 fixed to the set plate 2 in the sub-tank 4. The sub-tank 4 prevents the fuel level around the fuel pump 5 from dropping even when the vehicle body is tilted, so that fuel can be supplied. The fuel pump 5 prevents the fuel from being sent to an engine (not shown). 5a is a filter installed at the suction port of the fuel pump 5, and 5b is a discharge port of the fuel pump 5. The fuel pump 5 is installed upright with the suction port down and the discharge port 5b up in order to use the fuel in the tank 1 effectively.

Reference numeral 7 denotes an elastic joint pipe connected to the discharge port 5b, and reference numeral 8 denotes a feed pipe, which is fixed to the set plate 2 in an oil-tight manner and supplies fuel to the outside of the tank 1 through an inner diameter thereof. It is possible to send. A portion of the feed pipe 8 inside the tank 1 is bent downward in a U-shape, and is connected to a discharge port 5 b of the fuel pump 5 through a joint pipe 7 at a tip thereof. Reference numeral 9 denotes a power supply line, which is oil-tightly passed through the set plate 2 and connected to the power supply terminal 5c to supply a power source to an electric motor (not shown) of the fuel pump 5.

In the conventional in-tank type fuel pump device configured as described above, when an electric motor (not shown) of the fuel pump 5 is operated, an impeller (not shown) connected to the electric motor rotates. Then, the fuel in the fuel tank 1 is sucked through the filter 5a, and supplied from the discharge port 5b to the engine from the fuel tank 1 through the joint pipe 7 and the feed pipe 8.

[0005]

In the conventional in-tank type fuel pump device as described above, the feed pipe 8 is extended into the tank 1 because the fuel pump 5 needs to be set upright.
It must be bent in the shape of a letter and connected to the discharge port 5b via the joint pipe 9. For this reason, the feed pipe 8
The inside of the tank 1 is cantilevered by the set plate 2 and the connection between the feed pipe 8 and the set plate 2 is fatigued due to resonance with vibrations and shocks of the vehicle or the like and engine vibrations, thereby impairing oil tightness. There were challenges.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the fatigue of a connection between a feed pipe connected to a discharge port side of a fuel pump and a set plate due to vibration or impact of a vehicle. It is intended to obtain an in-tank type fuel pump device having a small amount of fuel.

[0007]

In the in-tank type fuel pump device according to the present invention, a feed pipe oil-tightly penetrating a set plate for closing an opening on the bottom surface of the fuel tank, and is fixed to the set plate. It has a base which is provided in the tank so as to be floated from the set plate surface by a predetermined dimension by an open leg and holds the fuel pump, and a support formed integrally with the base and extended to the inside of the fuel tank. The rising portion of the feed pipe is fixed, and the tip is connected to the discharge port of the fuel pump via a joint pipe.

A filter device attached to the support, and a connecting pipe fixed to the tip of the support,
The rising part of the feed pipe is fixed to the support, and the feed pipe and the outlet of the filter device, the inlet of the filter device and one end of the connection pipe, the other end of the connection pipe, and the discharge port of the fuel pump are respectively jointed. They are connected via pipes.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a side sectional view of an in-tank type fuel pump device showing an embodiment of the present invention, and FIG.
3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a side view. In the drawing, reference numerals 1 to 3 are the same as those described in the conventional apparatus. Reference numeral 10 denotes a fuel pump which has a suction port 10a, a suction-side filter 11 mounted on the suction port 10a, and a discharge port 10b.
It is mounted upright with the 0a side down. Numeral 12 denotes a rubber mount made of an elastic material such as rubber, which is provided around a suction port 10a located at a lower end face of the fuel pump 10 so as to absorb vibration generated by operation of an electric motor (not shown) of the fuel pump 10. Is provided.

Reference numeral 13 designates the fuel pump 10 as the rubber mount 1
The base 13 is supported through the base 2, and has a leg 13 b that supports the base 13, and a column 13 c that is formed integrally with the base 13 and rises upward and has a U-shaped cross section. The column 13c supports a feeding pipe 14 described later and various parts mounted on the pump device. As shown in FIG. 2A, the leg portion 13b is composed of three leg portions 13b which are split and opened in three directions, and all three leg portions 13b are fixed to the set plate 2 respectively. Pump 1
The strength against the right and left and front and rear vibrations applied to the feed pipe 14 is improved. 13d is a rubber mount insertion hole.

Reference numeral 14 denotes a feed pipe, which penetrates the set plate 2 in an oil-tight manner, one end of which is drawn out of the fuel tank 1 and the other end of which is raised in the tank 1. It is fixed to the support 13c. The distal end is bent in a U-shape and connected to the discharge port 10 b of the fuel pump 10 via the joint pipe 15 and the band 16. The base 13 raises the suction port 10a above the bottom surface 1b of the fuel tank 1 by a predetermined level L1 so as to secure a predetermined remaining amount of fuel. Reference numeral 17 denotes a terminal plate, a flange 17a is fixed to the set plate 2 in an oil-tight manner, and a power supply terminal 18 to which an electric wire (not shown) to the fuel pump 10 is connected at the upper end, and a position of the remaining fuel amount. A thermistor terminal 19 for supplying power to a thermistor (not shown) for detecting the pressure is mounted in an oil-tight manner.

In the above-described fuel pump device, the base 13 lifted by the legs 13b to raise the suction port 10a of the fuel pump 10 from the bottom surface 1b of the fuel tank 1.
And a feed pipe 14 raised in the tank 1 are fixed by welding or the like. A base 13 that holds the fuel pump 10 is supported by three legs 13b that protrude in three directions so as to have vibration resistance in the left-right and front-rear directions, and a column 13c that rises from the base 13.
Since the feed pipe 14 and the support 13c are reinforced with each other in a bridge shape by fixing the feed pipe 14 to the feed pipe 14, the cantilever state of the feed pipe 14 is eliminated, and vibration and impact of the vehicle or the like are eliminated. Vibration of the feed pipe 14 is reduced, and fatigue due to vibration and impact of the oil-tight mounting portion between the feed pipe 14 and the set plate 2 is reduced, thereby preventing oil-tightness from being impaired.

In the in-tank type fuel pump device constructed as described above, the fuel pump 10 and the feed pipe 1 are attached to the base 13 and the support 13c fixed to the set plate 2.
The pump device unit is obtained by assembling the components 4 and various components associated therewith. This pump unit is a fuel tank 1
Is incorporated into the tank 1 through the opening 1c of the bottom surface 1b. When the electric motor of the fuel pump 10 is driven,
The fuel in the fuel tank 1 is sucked into the suction port 10a through the suction side filter 11 by the rotation of the impeller, and the joint pipe 15 and the feeding pipe 14 are discharged from the discharge port 10b.
Is supplied to the engine outside the fuel tank 1 through the engine.

Embodiment 2 FIG. FIG. 3 is a side sectional view of an in-tank type fuel pump device according to a second embodiment of the present invention,
FIGS. 4A and 4B are three views of the support, where FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a side view. FIG. 5 is FIG.
FIG. 5 is a sectional view taken along line VV of FIG. In the figure, 1-3, 1
Reference numerals 0 to 19 are the same as those in the first embodiment, and a description thereof will be omitted. Reference numeral 21 denotes a filter device, and the fuel pump 1
The filter holder 22 filters the dust in the fuel discharged from the filter holder 22.
It is attached to f with a screw 23. Reference numeral 24 denotes a metallic connection pipe fixed to the tip of the column 13 c, one end of which is connected to the discharge port 1 of the fuel pump 10 through the joint pipe 15.
0b, and the other end is connected to the inflow port 21a of the filter device 21 via the joint pipe 15. 2
Numeral 5 denotes a feed pipe, one end of which is passed through the set plate 2 in an oil-tight manner and is drawn out of the fuel tank 1 and the fuel pump
The fuel discharged from 0 is supplied to the outside. The other end has its rising portion fixed to the column 13c,
The tip is connected to the outlet 21b of the filter device 21 via the joint pipe 15.

The operation of the thus constructed in-tank fuel pump device is the same as that of the first embodiment, and a description thereof will be omitted.

In the second embodiment, a fuel pump 10 and a filter device 21 are integrally mounted inside a fuel tank 1 as an in-tank type fuel pump device. When the filter device 21 is provided between the discharge port 10b of the fuel pump 10 and the feed pipe 25, the filter device is mounted on a filter holding portion 13f in which the rising of the feed pipe 25 and the support 13c are joined and mutually reinforced in a bridge shape. 21 can be attached. As described above, since the rising of the feed pipe 25 and the column 13c are mutually reinforced, even if the filter device 21 and other parts are mounted on the column 13c, the filter device 21 and other components due to the vibration or impact of the vehicle or the like may be used. Even if the mass of the parts is added to the support 13c, the feed pipe 25
Vibration of the oil-tight part can be eliminated. Further, a connection pipe 24 connecting the filter device 21 and the discharge port 10b of the fuel pump 10 is fixed to the tip of the support 13c,
Since each is connected by joint pipe 15,
This portion can also have vibration resistance and shock resistance.

[0017]

According to the in-tank type fuel pump device of the present invention, a support is formed integrally with a base supporting the fuel pump to form a support. Since the portion is fixed and the support and the feed pipe are mutually reinforced, fatigue due to vibration and impact of the mounting portion between the feed pipe and the set plate is reduced, and oil tightness is not impaired.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an in-tank type fuel pump device according to a first embodiment of the present invention.

2 (A) is a plan view, FIG. 2 (B) is a front view, and FIG. 2 (C) is a side view.

FIG. 3 is a side sectional view of an in-tank type fuel pump device according to a second embodiment of the present invention.

4 (A) is a plan view, FIG. 4 (B) is a front view, and FIG. 4 (C) is a side view showing a support according to Embodiment 2 of the present invention.

FIG. 5 is a sectional view taken along line VV in FIG. 4 (B).

FIG. 6 is a side sectional view showing a conventional in-tank type fuel pump device.

[Explanation of symbols]

1 fuel tank, 2 set plates, 5, 1
0 Fuel pump 7, 15 Joint pipe, 13 base, 1
3b leg 13c strut, 14, 25 feed pipe, 21
Filter device 24 Connecting pipe

Claims (2)

[Claims] 1. An in-tank type fuel pump device assembled into the fuel tank from an opening at a bottom surface of the fuel tank, wherein a set plate for closing the opening of the fuel tank, an oil-tight penetrating the set plate and one end is provided. A feed pipe for sending a fuel liquid out of the fuel tank, a base fixed to an inner surface of the fuel tank of the set plate and having a predetermined length from the surface of the set plate by open legs from at least three directions; A fuel pump installed on the base with its suction port side down; and a column formed integrally with the base and extended to the inner surface side of the fuel tank. An in-tank type fuel pump wherein the end side is fixed, and the other end is connected to a discharge port of the fuel pump via an elastic joint pipe. Apparatus. 2. A connection pipe fixed to a tip of a support, and a filter device attached to the support and filtering a fuel liquid sent from a fuel pump, wherein the support is connected to the other end of a feed pipe. With the other end of the feed pipe fixed, the other end of the feed pipe is connected to the outlet of the filter device, the inlet of the filter device is connected to one end of the connection pipe, and the other end of the connection pipe is connected to the discharge port of the fuel pump. 2. The in-tank fuel pump device according to claim 1, wherein the fuel tanks are connected via joint pipes each having elasticity.