TWI443257B - Fuel supply device - Google Patents

Description

Fuel supply device

The present invention relates to a fuel supply device that is held in an opening of a fuel tank of a two-wheeled vehicle or the like and that sends fuel out of the fuel tank.

A conventional fuel supply device for a motorcycle is generally fixed to a flange portion of a fuel tank by a pump portion, a motor portion that drives the pump portion, and a stator portion that constitutes the motor portion and that covers an opening portion of the fuel tank. In addition, in recent years, various proposals have been made for the miniaturization and weight reduction of the fuel supply device.

Further, there is proposed a device for delivering a pressurized fuel discharged from a fuel supply device to a discharge pump of an engine, a connector for connecting an external electric circuit, and a motor portion for driving a pump portion of the fuel tank. The flange portion is integrally molded, and the stator core wound around the wire is integrally molded into the molded body in the molding process (see, for example, Patent Document 1 and FIG. 1).

(previous technical literature) (Patent Literature)

(Patent Document 1) Japanese Patent Laid-Open Publication No. 2009-222055

Although the conventional fuel supply device is configured as described above, the exhaust amount of the two-wheeled vehicle is from the light 50 cc to the heavy duty 2000 c, and the fuel supply amount of the fuel supply device differs depending on the exhaust amount. Therefore, it is necessary to change the specifications of the stator portion, the motor portion, and the pump portion depending on the amount of supply.

However, in the conventional fuel supply device, there is a problem that the flange portion and the motor portion are integrally formed, and it is necessary to prepare a flange portion which is integrally molded by a plurality of moldings depending on the amount of exhaust gas.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a fuel supply device which is a housing in which a pump unit and a motor unit are integrally molded, and a flange portion in which a discharge tube and a connector are integrally formed. When it is attached to the fuel tank, it can be combined with each other, and the flange portion can be shared even if the casing changes depending on the specifications. Therefore, it is possible to cope with a plurality of types of exhaust gas, and it is possible to reliably supply electric power to the motor portion.

The fuel supply device of the present invention is configured by a motor unit that drives the pump unit, and a flange portion that is fixed to the fuel tank so as to cover the opening of the fuel tank while holding the pump unit and the motor unit, and is configured to pass through the discharge pipe. When the fuel in the fuel tank is sent to the outside of the fuel tank, the fuel supply device is characterized in that the discharge pipe, the electric power supply means for supplying electric power to the motor portion, and the flange side for extending the pump portion and the motor portion are provided. The joint portion is integrally formed with the flange of the flange portion, and the stator portion molded with the wire portion of the motor portion and the stator core, and the casing side joint portion coupled to the flange side joint portion are integrally formed at case.

The fuel supply device of the present invention is a form in which a casing in which a pump portion and a motor portion are integrally formed, and a flange portion in which a discharge pipe and a connector are integrally formed are joined to each other, whereby a size of the casing can be provided. The amount of exhaust gas is not the same, and the flange portion can be shared, and can be handled in accordance with a plurality of types of exhaust gas, and the electric power can be surely supplied to the motor portion.

(Embodiment 1)

Fig. 1 is a longitudinal sectional view of a fuel supply device according to a first embodiment of the present invention, and Fig. 2 is an enlarged view of a main part of Fig. 1, and Fig. 3 is a partial cross-sectional view of a flange side joint portion, and Fig. 4 is a housing An oblique view of the side joint portion, and Fig. 5 is a longitudinal sectional view of another embodiment.

The configuration of the fuel supply device 100 according to the first embodiment of the present invention will be described with reference to Figs. 1 to 4 .

The fuel supply device 100 is hoisted in the opening 2a of the fuel tank 2 for storing the fuel 1, for example, in the motorcycle, and the pump unit 20, the motor unit 30 belonging to the drive source of the pump unit 20, and the pair of fuel tanks. The flange portion 40 of the mounting member of 2 is formed.

The pump unit 20 is configured by accommodating the impeller 5 in the pump base 3 and the pump cover 4, and the pump in the fuel supply device 100 according to the embodiment of the present invention is a so-called turbo pump.

The impeller 5 formed in a disk shape is housed so as to be sandwiched from both sides of the front and back sides of the pump base 3 and the pump cover 4, and the center portion is engaged with the shaft 9c of the rotor portion 9 to be described later, and is fixed by The bearing 6 in the central portion of the pump cover 4 is supported to be freely rotatable. The pump base 3 and the pump cover 4 are held by a pump holder 18 which is engaged by a snap-fit with a hole 10c provided at one end of the casing 10 to be described later. Combined and fixed. A suction port 4a for sucking the fuel 1 in the fuel tank 2 is disposed on the fuel tank 2 side (the lower side in FIG. 1) of the pump cover 4.

A C-shaped pump flow path 20a is formed on the outer peripheral side of the impeller 5, the pump base 3, and the pump cover 4 on the side opposite to the impeller 5, and the fuel 1 in the fuel tank 2 is combined with the pump cover 4. The suction filter 7 filters and flows in from the suction port 4a, flows through the pump flow path 20a by the rotation of the impeller 5, and is pressurized, and is pressure-fed to the motor unit 30 side.

The fuel that is pumped from the pump unit 20 to the motor unit 30 is passed between the stator core 8a and the rotor unit 9 (see FIG. 2), which will be described later, and is supplied to the fuel via the communication passage 11f formed in the flange portion 40, which will be described later. Path 11d (Fig. 1).

The motor unit 30 is a brushless motor and is composed of a stator portion 8 and a rotor portion 9, and the stator portion 8 is composed of a stator core 8a formed of a magnetic body and a coil 8b wound around the stator core 8a. The rotor portion 9 is composed of a magnet 9b fixed to the outer circumferential surface of the cylindrical rotor core 9a and a shaft 9c inserted in the center of the rotor core 9a.

The rotor portion 9 is rotatably provided on the inner circumference of the stator core 8a, and the shaft 9c is rotatably supported by a bearing 6 (shown in Fig. 1).

In addition, the magnet 9b is formed into a cylindrical plastic magnet by mixing a magnetic powder into a thermoplastic resin material such as PPS (phenylene sulfide), and is magnetized so as to be formed on the outer peripheral side opposite to the stator core 8a. Magnetic poles with different directions of rotation.

In addition, the stator cores 8a (Fig. 2) are formed by pressing the magnetic steel sheets stacked in the axial direction, and the teeth 8c protruding toward the center side of the motor unit 30 are formed at an equiangular interval in the circumferential direction, for example, six. . The stator core 8a is provided with an insulator 8d made of an insulating material so as to cover the surface thereof, and a wire 8b is wound around the insulator 8d. The coil 8b is supplied with a three-phase alternating current from a control device (not shown), and is connected in a star shape so as to generate a rotating magnetic field in the circumferential direction, and is connected to three load terminals 12a, 12b, and 12c (the second) to be described later. Figure).

Further, the casing 10 is formed of a thermoplastic resin such as a polyacetal resin, and is integrally molded with a stator core 8a and a wire 8b, and is electrically connected to the coil 8b and disposed on a casing side to be described later. Since the load terminals 12a, 12b, and 12c and the stator portion 8 on the outer circumference of the joint portion 10a are filled with a resin material, the fuel does not directly contact the coil 8b, and the strand 8b can be prevented even if a deteriorated fuel or a low-quality fuel is used. Corrosion.

The housing side joint portion 10a that is detachably formed on the flange side joint portion 11e of the flange portion 40 to be described later is provided on the opposite side of the pump portion 20 of the casing 10 (in the direction of the upper side in the first drawing), Further, the engagement recess 10a1 is disposed at an inner circumference of the casing-side joint portion 10a at a pitch of substantially 120 degrees (see FIG. 4).

The flange portion 40 is constituted by a flange 11 or the like in which a discharge pipe 11a and a connection portion 11b are integrally molded with a thermoplastic resin material such as PPS resin or POM resin, and the discharge pipe 11a is connected via a fuel pipe (not shown). When the pressurized fuel is sent to an engine (not shown), the connecting portion 11b belongs to the power supply means and has a terminal 11b1 for supplying electric power to the coil 8b. The flange 11 is formed in a flat plate shape orthogonal to the axial direction (the upper and lower directions in FIG. 1 ), and is fitted to the circular opening portion 2 a of the fuel tank 2 and between the outer surface of the fuel tank 2 and the outer surface of the fuel tank 2 In a state where the flat plate portion is in close contact with each other, the flat portion is attached to the fuel tank 2 by being connected by a fixing metal member (not shown). In the center portion of the flange 11, a communication passage 11f that communicates the fuel filtered by the discharge filter 16 to be described later to the fuel passage 11d is formed.

A check valve 13 is disposed in the middle of the fuel passage 11d. The check valve 13 is composed of a valve body 13a, a valve seat 13b, and a spring 13c. The spring 13c is a coil spring, and is in a compressed state in a state where the check valve 13 is completed. The valve body 13a is in contact with the valve seat 13b by the elastic force of the spring 13c, and acts on the downstream side of the valve body 13a toward the fuel passage 11d by the fuel pressure discharged from the pump unit 20 during the operation of the fuel supply device 100. The force in the direction of the left side in Fig. 1 is larger than the spring force of the spring 13c, the valve body 13a is separated from the valve seat 13b, and the fuel flows to the discharge pipe 11a.

On the other hand, in the stop of the fuel supply device 100, since the valve body 13a comes into contact with the valve seat 13b due to the elastic force of the spring 13c, the fuel passage 11d is blocked by the check valve 13. Therefore, the fuel in the fuel passage 11d on the downstream side of the check valve 13 and the fuel in the fuel pipe (not shown) connected to the discharge pipe 11a are not returned to the fuel tank 2 via the fuel supply device 100 but are maintained. It stays in the tube as it is, and the pressurized fuel pressure is also maintained. Therefore, at the next engine start, the fuel system is immediately supplied to the engine, and a quick engine start is possible.

In addition, in the middle of the fuel passage 11d on the downstream side of the check valve 13, the pressure regulating valve 14 is disposed in the fuel tank 2 (downward in the first drawing).

The pressure regulating valve 14 is composed of a valve body 14a, a valve seat 14b, and a spring 14c. In this case, the spring 14c is a coiled spring, and is in a compressed state in the completed state of the pressure regulating valve 14. The pressure regulating valve 14 will be from the fuel supply device 100 The fuel pressure sent is adjusted to the desired pressure. Here, the desired pressure refers to the fuel pressure required from the engine side. In the pressure regulating valve 14, the contact/disengagement state of the valve body 14a and the valve seat 14b is determined in accordance with the magnitude relationship between the force acting on the valve body 14a due to the fuel pressure and the spring force of the spring 14c.

That is, when the fuel pressure in the fuel passage 11d is equal to or lower than the desired pressure, the valve body 14a abuts against the valve seat 14b, and the pressure regulating valve 14 is closed. When the fuel pressure of the fuel passage 11d exceeds the desired pressure, the valve body 14a is separated from the valve seat 14b and the pressure regulating valve 14 is opened, and a part of the fuel in the fuel passage 11d is returned to the fuel tank 2 via the pressure regulating valve 14. Internally (i.e., returning to the low pressure region), thereby maintaining the fuel pressure in the fuel passage 11d at the desired pressure. A through hole 10b is provided in a position of the casing 10 on the fuel tank 2 side of the pressure regulating valve 14 corresponding to the pressure regulating valve 14, and the fuel discharged from the pressure regulating valve 14 is returned to the fuel tank 2 through the through hole 10b.

Further, as is apparent from FIGS. 1 to 3, a flange-side joint portion 11e is formed in the flange 11 of the flange portion 40, and the flange-side joint portion 11e is detachably formed with the casing 10 The casing side joint portion 10a is provided with an engagement convex portion 11e1 at a pitch of substantially 120 degrees on the outer circumference of the flange side joint portion 11e, and the engagement convex portion 11e1 is snap-fitted to the casing side The engagement recess 10a1 of the joint portion 10a is engaged.

Further, power supply terminals 17a, 17b, 17c are electrically disposed at the outer periphery of the flange-side joint portion 11e, and the power supply terminals 17a, 17b, 17c are electrically connected to the terminal 11b1, and when the flange-side joint portion 11e is coupled to the housing The side joint portion 10a is electrically connected to the load terminals 12a, 12b, and 12c (see Fig. 3).

15a is an O-ring of the airtight member, and is an airtight state in which the joint between the flange side joint portion 11e and the casing side joint portion 10a is achieved.

Further, a discharge filter 16 for filtering the fuel 1 sent out of the fuel tank 2 is disposed inside the flange side joint portion 11e. The discharge filter 16 is formed in a daisy-shaped tubular shape or a drum-shaped filter material, and is arranged concentrically with respect to the cylindrical shape of the rotor portion 9, and the fuel system flowing between the stator core 8a and the rotor portion 9 is opposed to The discharge filter 16 flows toward the arrow A, the arrow B, and the arrow C (second diagram), and flows evenly in the circumferential direction of the discharge filter 16, so that the pressure loss is reduced.

In addition, the connection passage 11f is disposed at a substantially central portion of the discharge filter 16, and the rotor portion 9, the discharge filter 16, and the communication passage 11f are linearly formed, so that the fuel smoothly passes and the pressure loss is small. Further, the filter material uses a non-woven fabric and has excellent filtration properties for a mesh filter or the like.

Next, the operation of the fuel supply device 100 configured as described above will be described. The drive current is supplied from the terminal 11b1 of the connector portion 11b via the power supply terminals 17a, 17b, 17c and the load terminals 12a, 12b, and 12c to the coil 8b from a control circuit (not shown), and the rotating magnetic field is generated in the stator portion 8. The teeth 8c of the opposing faces facing the rotor portion 9.

The magnet 9b disposed in the rotor portion 9 rotates in accordance with the magnetic pole, and the impeller 5 engaged with the shaft 9c of the rotor portion 9 also rotates, and a swirling flow occurs in the C-shaped pump flow path 20a.

The fuel 1 in the fuel tank 2 flows in from the suction port 4a provided in the pump cover 4 via the suction filter 7, flows through the pump flow path 20a by the rotation of the impeller 5, is pressurized, and is pumped to the motor. The side of the portion 30 (above the pump portion 20 in Fig. 1).

The fuel 1 that is pressure-fed to the motor unit 30 side passes between the stator core 8a and the rotor portion 9, flows into the communication passage 11f formed in the flange portion 40 via the discharge filter 16, and is supplied to the fuel passage 11d. The fuel that has flowed into the fuel passage 11d is regulated by the pressure regulating valve 14 to a desired pressure, and is discharged from the discharge pipe 11a to an internal combustion engine such as an engine of a vehicle (not shown).

During the stop of the fuel supply device 100, the fuel connected to the fuel pipe 11d on the downstream side and the fuel pipe of the discharge pipe 11a by the action of the check valve 13 is held at the pressurized fuel pressure.

Fig. 5 is a view showing another embodiment for explaining the effects of the present invention.

The fuel supply device shown in the first to fourth figures described above is a vehicle having a light displacement of, for example, 50 cc to 250 cc, which is lighter in weight, and the medium shown in Fig. 5 is a medium sized medium of 400 cc. A fuel supply device for vehicles with a heavy duty of 2000 cc.

In Fig. 5, reference numeral 80 denotes a stator portion, and its outer diameter is substantially the same as that of the stator portion 8, but the overall length is formed to be long. The 90-series is a rotor portion, and its outer diameter is substantially the same as that of the rotor portion 9, but the overall length is formed to be long.

Further, the entire length of the casing 100 and the stator core is also formed to be long, and is integrally molded with a resin.

The fuel supply device configured as described above is formed such that the stator portion 80 and the rotor portion 90 are longer than the stator portion 8 and the rotor portion 9, and the drive current is supplied from the terminal 11b1 to the stator portion 80 from a control circuit (not shown). When the wire is twisted, the magnetic force generated by the teeth of the stator portion 80 facing the opposing surface of the rotor portion 90 is strong, the torque generated in the rotor portion 90 is large, and the number of rotations can be increased, so that the discharge is performed. The discharge amount of the discharge from the tube 11a also becomes large, and can correspond to a vehicle having a large displacement.

As described above, according to the fuel supply device of the first embodiment of the present invention, by separately using the stator portion 80 and the rotor portion 90, it is possible to provide a fuel supply device that does not require preparation of a plurality of flange portions 40 and corresponding to a plurality of types of exhaust gas. .

Further, since the power supply terminals 17a, 17b, 17c are provided on the outer circumference of the flange-side joint portion 11e, and the load terminal 12a electrically connected to the power supply terminals 17a, 17b, 17c is provided on the inner circumference of the casing-side joint portion 10a. 12b, 12c, when the housing side joint portion 10a is fitted to the flange side joint portion 11e, the power source terminals 17a, 17b, 17c and the load terminals 12a, 12b, 12c are simultaneously contacted, and the slave connector 11b The supplied electric power is surely supplied to the motor unit 30.

(Embodiment 2)

The configuration of the fuel supply device 200 according to the second embodiment of the present invention will be described. Fig. 6 is an enlarged view of a main part of a fuel supply device according to a second embodiment of the present invention. Fig. 7 is a side view showing the flange side joint portion of Fig. 6. Fig. 8 is a perspective view showing the housing side joint portion of Fig. 6.

In Fig. 6, only the component numbers different from those in Fig. 1 are the same as those in the first embodiment.

In the sixth embodiment, the housing 101 is integrally inserted with a stator core 8a, a coil 8b, and load terminals 120a and 120b electrically connected to the coil 8b and disposed on the inner circumference of the housing-side joint portion 101a. 120c.

In FIGS. 7 and 8, the power supply terminals 170a, 170b, and 170c are electrically connected to the terminal 11b1 on the outer circumference of the flange-side joint portion 110e of the flange 110. (Refer to Fig. 1), and when the flange-side joint portion 110e is coupled to the casing-side joint portion 101a, it is electrically connected to the load terminals 120a, 120b, and 120c.

Further, the engagement convex portion 110e1 is disposed at an inner circumference of the flange-side coupling portion 110e at a distance of substantially 120 degrees, and the engagement concave portion 101a1 is disposed at a distance of substantially 120 degrees within the housing-side joint portion 101a. Since the circumference, the motor unit 30 and the pump unit 20 (see FIG. 1) can be firmly fixed to the flange portion 40.

Further, according to the fuel supply device of the second embodiment of the present invention, the power supply terminals 170a, 170b, and 170c are disposed at intervals of approximately 120 degrees from the outer periphery of the flange-side joint portion 110e, and are spaced apart from the aforementioned engagement recess portion by approximately 120 degrees. When the 101a1 is deviated from the predetermined angle, the load terminals 120a, 120b, and 120c that are in contact with the power supply terminals 170a, 170b, and 170c are provided on the inner circumference of the casing-side joint portion 101a, and thus have the following effects: The elastic force of the casing-side joint portion 101a acts on the load terminals 120a, 120b, and 120c, and the power supply terminals 170a, 170b, and 170c and the load terminals 120a, 120b, and 120c are in contact with each other in a mechanically stable state, and will be unillustrated. The power supplied from the connector is supplied to the motor unit (not shown) in a sure and balanced manner.

(Embodiment 3)

The configuration of the fuel supply device 300 according to the third embodiment of the present invention will be described.

Figure 9 is a longitudinal sectional view showing a fuel supply device according to a third embodiment of the present invention. The other components are the same as those of the first embodiment only for the component reference numerals different from those of the first embodiment.

In the fuel supply device according to the first embodiment or the second embodiment of the present invention, the engagement convex portion 11e1 is disposed in the flange side joint portion 11e, and the engagement concave portion 101a1 is disposed on the casing side joint portion 101a, and the engagement convex portion is disposed. The portion 11e1 is engaged with the engagement recessed portion 101a1. However, as shown in Fig. 9, the wire member 19 may be inserted into the flange-side joint portion 210e in advance, and a current may be applied to the wire member 19, thereby joining the flange side. The portion 210e is melted to weld the combined casing side joint portion 210a.

At this time, after the load terminals 12a, 12b, and 12c are inserted into the power supply terminals 17a, 17b, and 17c and electrically connected, the flange side joint portion 210e is coupled to the case side joint portion 210a by welding, and the load is applied. The terminals 12a, 12b, and 12c are inserted into the power supply terminals 17a, 17b, and 17c. Since the housing 10 and the flange 11 are integrally formed, the flange-side joint portion 210e and the shell are welded by hot wire. When the body-side joint portions 210a are melted and welded to each other, the welding operation can be easily performed.

Further, in the power supply terminals 17a, 17b, and 17c and the load terminals 12a, 12b, and 12c, the power supply terminals 17a, 17b, and 17c and the load terminals 12a, 12b, and 12c may be separated by substantially 120 degrees in the same manner as in the second embodiment. The outer circumference of the flange side joint portion 210e and the inner circumference of the casing side joint portion 201a are joined.

1. . . fuel

1a. . . Spit tube

1b. . . Connector

1b1. . . Terminal

2. . . Fuel tank

2a. . . Opening

3. . . Pump base

3b. . . Insole

3c. . . Engagement hole

4. . . Pump cover

4a. . . suction point

5. . . impeller

6. . . Bearing

7. . . Suction filter

7a. . . suction point

8, 80. . . Stator section

8a. . . Stator core

8b. . . Line

8c. . . tooth

8d. . . Insulator

9, 90. . . Rotor section

9a. . . Rotor core

9b‧‧‧ magnet

9c‧‧‧axis

10, 101‧‧‧ shell

10a, 101a, 201a‧‧‧ housing side joints

10a1, 101a1‧‧‧ engaging recess

10b‧‧‧through hole

10c‧‧ hole

11, 110‧‧‧Flange

11a‧‧‧ spit tube

11b‧‧‧Connector

11b1‧‧‧ terminals

11b2‧‧‧Power terminal

11c‧‧‧ Bearing Maintenance Department

11d‧‧‧Fuel access

11e, 110e, 210e‧‧‧Flange side joints

11e1, 110e1‧‧‧ engaging convex parts

11f‧‧‧Contact Path

12a, 12b, 12c, 120a, 120b, 120c‧‧‧ load terminals

13‧‧‧ check valve

13a, 14a‧‧‧ body

13b, 14b‧‧‧ seat

13c, 14c‧‧ spring

14‧‧‧pressure regulator

15‧‧‧ cushion

16‧‧‧Spit filter

16a‧‧‧ filter paper

17a, 17b, 17c, 170a, 170b, 170c‧‧‧ power terminals

18‧‧‧ pump holder

19‧‧‧Wire

20‧‧‧ pump department

20a‧‧‧ pump flow path

30‧‧ ‧Motor Department

40‧‧‧Flange

100, 200, 300‧‧‧ fuel supply device

Fig. 1 is a longitudinal sectional view showing a fuel supply device according to a first embodiment of the present invention.

Fig. 2 is an enlarged view of a main part of Fig. 1.

Fig. 3 is a partially cutaway cross-sectional view showing the flange side joint portion of Fig. 1.

Fig. 4 is a perspective view showing the casing side joint portion of Fig. 1.

Fig. 5 is a longitudinal sectional view showing another embodiment of the first embodiment of the present invention.

Fig. 6 is an enlarged view of a main part of a fuel supply device according to a second embodiment of the present invention.

Fig. 7 is a side view showing the flange side joint portion of Fig. 6.

Fig. 8 is a perspective view showing the housing side joint portion of Fig. 6.

Figure 9 is a longitudinal sectional view showing a fuel supply device according to a third embodiment of the present invention.

1‧‧‧fuel

2‧‧‧fuel tank

2a‧‧‧ openings

3‧‧‧ pump base

4‧‧‧ pump cover

4a‧‧‧Inhalation

5‧‧‧ Impeller

6‧‧‧ bearing

7‧‧‧Inhalation filter

8‧‧‧ stator

9‧‧‧Rotor Department

9c‧‧‧axis

10‧‧‧shell

10a‧‧‧Shell side joint

10b‧‧‧through hole

10c‧‧ hole

11‧‧‧Flange

11a‧‧‧ spit tube

11b‧‧‧Connector

11b1‧‧‧ terminals

11d‧‧‧Fuel access

11e‧‧‧Flange side joint

11f‧‧‧Contact Path

13‧‧‧ check valve

13a, 14a‧‧‧ body

13b, 14b‧‧‧ seat

13c, 14c‧‧ spring

14‧‧‧pressure regulator

15‧‧‧ cushion

16‧‧‧Spit filter

18‧‧‧ pump holder

20‧‧‧ pump department

20a‧‧‧ pump flow path

30‧‧ ‧Motor Department

40‧‧‧Flange

100‧‧‧fuel supply unit

Claims (9)

A fuel supply device includes a motor unit that drives a pump unit, and a flange portion that is fixed to the fuel tank so as to cover the pump unit and the motor unit so as to cover the opening of the fuel tank, and is disposed via a discharge pipe The fuel supply device is configured to send the fuel to the outside of the fuel tank, the fuel supply device having the discharge pipe, a power supply means for supplying electric power to the motor portion, and a motor for holding the pump portion and the motor The flange-side joint portion that is extended is integrally formed on the flange of the flange portion, and the stator portion that forms the wire portion of the motor portion and the stator core is molded, and is coupled to the flange side. The casing-side joint portion of the portion is integrally formed with the casing; and further, the flange-side joint portion is provided with an engagement convex portion, and the casing-side joint portion is provided with the engagement with the engagement convex portion. Concave. The fuel supply device according to claim 1, wherein the engagement convex portion is disposed at an outer circumferential surface of the flange side joint portion at a distance of substantially 120 degrees, and the engagement concave portion is substantially 120 degrees. The distance between the housings is disposed on the inner circumference of the housing side joint portion. The fuel supply device according to claim 1, wherein a power supply terminal is provided on the outer circumference of the flange side joint portion, and a load terminal that is in contact with the power source terminal is provided on the outer circumference of the housing side joint portion. When the flange side joint portion is coupled to the casing side joint portion, the power source terminal is electrically connected to the load terminal. The fuel supply device according to claim 1, wherein a power supply terminal is disposed at an outer circumference of the flange-side joint portion at a distance of approximately 120 degrees, and a load terminal contacting the power source terminal is disposed at an inner circumference of the casing-side joint portion at a distance of approximately 120 degrees, when the flange is When the side joint portion is coupled to the casing side joint portion, the power source terminal is electrically connected to the load terminal. A fuel supply device includes a motor unit that drives a pump unit, and a flange portion that is fixed to the fuel tank so as to cover the pump unit and the motor unit so as to cover the opening of the fuel tank, and is disposed via a discharge pipe The fuel supply device is configured to send the fuel to the outside of the fuel tank, the fuel supply device having the discharge pipe, a power supply means for supplying electric power to the motor portion, and a motor for holding the pump portion and the motor The flange-side joint portion that is extended is integrally formed on the flange of the flange portion, and the stator portion that forms the wire portion of the motor portion and the stator core is molded, and is coupled to the flange side. The casing side joint portion of the portion is integrally formed with the casing; and the combination of the flange side joint portion and the casing side joint portion is performed by fusion bonding of the heat wires. A fuel supply device includes a motor unit that drives a pump unit, and a flange portion that is fixed to the fuel tank so as to cover the pump unit and the motor unit so as to cover the opening of the fuel tank, and is discharged. The fuel supply device sends the fuel in the fuel tank to the outside of the fuel tank, and the fuel supply device is characterized in that: the discharge pipe and the electric power for supplying electric power to the motor portion a supply means and a flange for integrally forming the flange portion joint portion for extending the pump portion and the motor portion, and a flange and a stator for forming the motor portion are molded by molding a stator portion of the core and a casing-side joint portion coupled to the flange-side joint portion are integrally formed in the casing; and the casing is integrally inserted and molded with a stator core, a wire, and an electric connection. Further, it is formed by a load terminal disposed on the outer circumference of the casing-side joint portion. The fuel supply device according to any one of claims 1 to 6, wherein a discharge filter for filtering the fuel sent to the outside of the fuel tank is disposed inside the flange side joint portion. . The fuel supply device according to claim 7, wherein the discharge filter is formed of a daisy-shaped tubular or drum-shaped filter material and is rotatable with respect to a rotor portion that receives a magnetic field generated by the stator portion. The cylindrical shape is arranged concentrically. The fuel supply device according to claim 8, wherein the filter medium is a non-woven fabric.