JP2010216331A - Fuel supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel supply device capable of preventing a suction filter device from coming out of a fuel pump in a comparatively simple structure. <P>SOLUTION: This fuel supply device includes the fuel pump 11 having a suction pipe 11a, a pump holder 31 supporting the fuel pump 11, and the suction filter device 13 having a connecting pipe 13b fitted with the suction pipe 11a, a locking piece 13c provided to the suction filter device 13, and a locking part 31e provided to the pump holder 31, wherein the locking part 31e locks the locking piece 13c, preventing coming out of the suction filter device 13 from the fuel pump 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fuel supply apparatus.

  Conventionally, there is a fuel supply device that is installed in a fuel tank of a vehicle and supplies fuel to an engine (for example, Patent Document 1).

  The fuel supply device of Patent Document 1 uses a fuel pump to discharge the fuel in the fuel tank toward the engine, and a suction filter device for filtering the fuel is mounted on the suction side of the fuel pump. Has been.

  In this fuel supply device, the connecting pipe (tubular portion) provided in the suction filter device is press-fitted into the suction pipe of the fuel pump, and the bottom of the fuel pump is inserted into the through hole of the fastening flange portion provided in the suction filter device. The protrusion is inserted, and the protrusion is prevented from coming out of the through hole by the ring that bites into the protrusion. In such a structure, the connecting pipe is prevented from coming off from the suction pipe by the fastening flange portion, the protrusion, and the ring.

JP 2006-57603 A

  However, the fuel supply device of Patent Document 1 has a problem in that the number of parts is large because the fastening flange portion, the protrusion, and the ring are necessary to prevent the connection tube from coming off from the suction tube.

  Therefore, an object of the present invention is to provide a fuel supply device that can prevent the suction filter device from coming off the fuel pump with a relatively simple structure.

  The fuel supply device of the present invention includes a fuel pump, a pump holder that supports the fuel pump, a suction filter device having a connection pipe that fits into a suction pipe of the fuel pump, and a latch provided in the suction filter device. And a locking portion that is provided on the pump holder and locks the locking piece to prevent the suction filter device from coming off the fuel pump.

  According to the present invention, the locking portion provided in the pump holder locks the locking piece provided in the suction filter device, thereby preventing the suction filter device from coming off from the fuel pump. In order to prevent the suction filter device from coming off, there is no need to provide the conventional ring separately from the locking portion and the locking piece, so the suction filter device can be prevented from coming off from the fuel pump with a relatively simple structure. Can do.

1 is a schematic configuration diagram showing a system including a fuel supply device according to an embodiment of the present invention. It is a longitudinal cross-sectional view which shows the principal part of the fuel supply apparatus concerning one Embodiment of this invention. It is an exploded view showing the fuel pump, pump holder, and suction filter device concerning one embodiment of the present invention. The pump holder and suction filter apparatus concerning one Embodiment of this invention are shown, (a) is a top view, (b) is a perspective view. It is a perspective view which shows the assembly | attachment process of the pump holder concerning one Embodiment of this invention, and a suction filter apparatus. It is a longitudinal cross-sectional view which shows the state by which the suction filter apparatus was assembled | attached to the pump holder concerning one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the state by which the suction filter apparatus was mounted | worn with the fuel pump concerning one Embodiment of this invention.

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

  As shown in FIG. 1, the fuel supply device 1 of the present embodiment is attached to a fuel tank 3 mounted on a vehicle, and constitutes a system for supplying fuel to an engine (not shown) with the fuel tank 3. ing.

  The fuel supply device 1 is fixed to the upper wall 3 a of the fuel tank 3 and hangs down from the opening 3 b formed in the upper wall 3 a to the inside of the fuel tank 3. The fuel supply device 1 is provided on a suction side of the fuel pump 11, a main body portion 7 as a lid, a reservoir 9 for storing fuel, a fuel pump 11 for sucking and discharging fuel inside the fuel tank 3, and a fuel pump 11. The suction filter device 13 and the fuel filter device 15 provided on the discharge side of the fuel pump 11 are provided.

  As shown in FIG. 2, the main body 7 is provided on a lid 7a for closing the opening 3b of the fuel tank 3, a bracket 7b extending downward from the lower surface of the lid 7a, and an upper surface of the lid 7a. And a connector 33 provided on the upper surface of the lid portion 7a.

  The reservoir 9 is formed in the upper surface opening and connected to the lower portion of the main body 7, and is disposed inside the fuel tank 3 in a state of being in contact with the bottom surface of the fuel tank 3. Inside the reservoir 9, a fuel pump 11, a suction filter device 13, and a fuel filter device 15 are inserted.

  As shown in FIGS. 2 and 3, the fuel pump 11 is formed in a substantially cylindrical shape, and is arranged so that the cylinder axis is along the vertical direction. The fuel pump 11 is provided with a suction pipe 11a for sucking fuel at a lower portion thereof, and the suction pipe 11a is opened downward. The suction pipe 11a is made of, for example, resin. The fuel pump 11 sucks the fuel inside the reservoir 9 as the fuel inside the fuel tank 3 from the suction pipe 11a via the suction filter device 13, and discharges the sucked fuel from the discharge pipe 11b. Thus, the fuel is sent to the engine via the fuel filter device 15 and the feed pipe 7c. The pressure of the fuel discharged from the fuel pump 11 is adjusted by a pressure regulator (not shown). A jet pump (not shown) is driven by the fuel returned from the pressure regulator to the fuel tank 3, and fuel outside the reservoir 9 is introduced into the reservoir 9 by the operation of the jet pump. Yes.

  The discharge pipe 11b is formed in the upper part of the fuel pump 11, and the fuel pump 11 is connected to the bracket 7 of the main body part 7 via the pump holder 31 in a state where the discharge pipe 11b is fitted in the recess 7e formed in the bracket. 7b is fixed.

  As shown in FIGS. 3 and 4, the pump holder 31 includes a cylindrical insertion portion 31 b and a bottom wall portion 31 a provided at the lower end portion of the insertion portion 31 b. The pump holder 31 is made of, for example, resin.

  More specifically, the insertion portion 31b is formed in a cylindrical shape, and the fuel pump 11 is inserted from above. The insertion portion 31 b supports the side surface of the fuel pump 11. A pair of claw portions 31d that are opposed to each other with the internal space of the insertion portion 31b interposed therebetween are formed in the peripheral portion of the insertion portion 31b, and the claw portions 31d are locking holes 7d formed in the bracket 7b. The pump holder 31 is fixed to the bracket 7b by this structure. In addition, a pair of cutout portions 31f communicating with the internal space of the insertion portion 31b is formed in the peripheral portion of the insertion portion 31b. The notch 31f is formed in a concave shape downward from the upper end of the insertion portion 31b.

  The bottom wall portion 31a supports the lower end portion of the fuel pump 11 inserted into the insertion portion 31b. The bottom wall portion 31a is formed with an opening portion 31c that communicates the inside and outside of the insertion portion. The opening 31c is formed in a size that allows a connecting pipe 13b, which will be described later, to be inserted from below and allows the locking piece 13c to pass therethrough.

  As shown in FIG. 3, the suction filter device 13 has a filter medium 13a for filtering fuel and a connecting pipe 13b to which the filter medium 13a is fixed. The filter medium 13a is made of, for example, a flexible mesh material. The connecting pipe 13b is provided in the upper part of the suction filter device 13 and opens upward, and its lower end opening is connected to the filter medium 13a. The connecting pipe 13 b is fitted with the suction pipe 11 a of the fuel pump 11 while being inserted through the opening 31 c of the pump holder 31. The suction pipe 11a is press-fitted into the connecting pipe 13b. With this structure, the fuel filtered by the filter medium 13a is introduced into the fuel pump 11 through the connecting pipe 13b and the suction pipe 11a. The connecting pipe 13b is made of, for example, resin.

  The suction filter device 13 is provided with a locking piece 13c, while the pump holder 31 is provided with a locking portion 31e for locking the locking piece 13c. By locking the stop piece 13 c, the suction filter device 13 is prevented from coming off and rotating from the fuel pump 11.

  The locking piece 13c is provided integrally with the connecting pipe 13b. Specifically, the locking piece 13c is made of resin, and constitutes a single resin molded product with the connecting pipe 13b. The locking piece 13c extends substantially horizontally from the side surface of the connecting pipe 13b and has a plate shape.

  On the other hand, the locking portion 31 e is provided on the bottom wall portion 31 a of the pump holder 31. The locking portion 31e has a bottom surface 31g that prevents the locking piece 13c from moving downward, and a pair of vertical surfaces 31h that prevents rotation of the locking piece 13c around the suction pipe 11a. A recess is formed on the upper surface of the portion 31a downward, and the inside of the recess communicates with the opening 31c. The locking portion 31e locks the locking piece 13c at the bottom surface 31g, thereby preventing the connecting pipe 13b from coming off from the suction pipe 11a, thereby preventing the suction filter device 13 from coming off from the fuel pump 11. . Further, the locking portion 31e locks the locking piece 13c with the vertical surface 31h, thereby preventing the connection pipe 13b from rotating with respect to the suction pipe 11a having the suction pipe 11a as the rotation center axis. The suction filter device 13 is prevented from rotating relative to the fuel pump 11 having 11a as the rotation center axis.

  Next, a procedure for mounting the suction filter device 13 to the fuel pump 11 will be described. First, as shown in FIG. 5, the connecting pipe 13 b of the suction filter device 13 is inserted into the opening 31 c of the pump holder 31 from below, and the locking piece 13 c is positioned inside the pump holder 31. Then, the suction filter device 13 is rotated around the central axis of the connecting pipe 13b (arrow A), and the locking piece 13c is positioned above the locking portion 31e (FIG. 6). From this state, the fuel pump 11 is inserted into the pump holder 31 from above the pump holder 31, and the suction pipe 11a is press-fitted into the connecting pipe 13b (FIG. 7). Thereby, the suction filter device 13 is fixed to the fuel pump 11. At this time, an initial gap may be formed between the locking piece 13c and the locking portion 31e, or the initial clearance is not formed by bringing the locking piece 13c and the locking portion 31e into contact with each other. You may do it. In the drawing, an example is shown in which the bottom surface 31g of the locking portion 31e and the locking piece 13c are in contact with each other, while the vertical surface 31h of the locking portion 31e and the locking piece 13c are separated from each other.

  In such a configuration, when an initial gap is not formed between the locking piece 13c and the bottom surface 31g of the locking portion 31e (FIGS. 2 and 6), the locking piece 13c is locked in this state. Since it is locked by the bottom surface 31g of the portion 31e, the connecting pipe 13b is prevented from coming off from the suction pipe 11a. On the other hand, when an initial gap is formed between the locking piece 13c and the bottom surface 31g of the locking portion 31e, the locking piece 13c is moved when the connecting pipe 13b moves in a direction (downward) from the suction pipe 11a. Is locked by the bottom surface 31g of the locking portion 31e, and further movement of the connecting pipe 13b in the pulling direction with respect to the suction pipe 11a is prevented, thereby preventing the connecting pipe 13b from coming off from the suction pipe 11a.

  If no initial gap is formed between the locking piece 13c and the vertical surface 31h of the locking portion 31e, the locking piece 13c is locked by the vertical surface 31h of the locking portion 31e in this state. Therefore, the rotation of the connecting pipe 13b with respect to the suction pipe 11a is stopped. On the other hand, when an initial gap is formed between the locking piece 13c and the vertical surface 31h of the locking portion 31e (FIG. 4B), when the connecting tube 13b rotates with respect to the suction tube 11a, The locking piece 13c is locked by the vertical surface 31h of the locking part 31e, and further rotation is prevented, whereby the rotation of the connecting pipe 13b with respect to the suction pipe 11a around the suction pipe 11a is stopped.

  As described above, in the present embodiment, the locking portion 31e provided in the pump holder 31 locks the locking piece 13c provided in the suction filter device 13, whereby the suction filter device for the fuel pump 11 is provided. 13 is secured. Therefore, it is not necessary to provide the conventional ring separately from the locking portion 31e and the locking piece 13c in order to prevent the suction filter device 13 from coming off from the fuel pump 11, so that the fuel pump 11 can be configured with a relatively simple structure. The suction filter device 13 can be prevented from coming off.

  In the present embodiment, the locking portion 31e locks the locking piece 13c, thereby preventing the rotation of the suction filter device 13 relative to the fuel pump 11 having the suction pipe 11a as the rotation center axis. The suction filter device 13 can be prevented from rotating with respect to the fuel pump 11 with a simple structure.

  Moreover, in this embodiment, the pump holder 31 has the insertion part 31b in which the fuel pump 11 is inserted from the upper part, and the bottom wall part 31a which supports the lower end part of the fuel pump 11 inserted in the insertion part 31b. . Therefore, the fuel pump 11 can be stably supported.

  Moreover, in this embodiment, the latching | locking part 31e is formed in the upper surface of the bottom wall part 31a of the pump holder 31, the pump holder 31 has the opening part 31c, and this opening part 31c is the insertion part 31b. The connecting pipe 13b is allowed to be inserted from below and the locking piece 13c is allowed to pass therethrough. Therefore, using the opening 31c into which the connecting pipe 13b is inserted, the locking piece 13c can be introduced into the pump holder 31 and the locking piece 13c can be locked by the locking portion 31e. Therefore, there is no need to provide an opening dedicated to the locking piece 13c in order to introduce the locking piece 13c into the pump holder 31, and the structure of the pump holder 31 can be simplified.

  The present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Fuel supply device 3 ... Fuel tank 11 ... Fuel pump 11a ... Intake pipe 13 ... Suction filter device 13b ... Connection pipe 13c ... Locking piece 31 ... Pump holder 31a ... Bottom wall part 31b ... Insertion part 31c ... Opening part 31e ... Locking part

Claims (3)

A fuel pump that has a suction pipe, sucks fuel in the fuel tank from the suction pipe, and discharges the sucked fuel;
A pump holder for supporting the fuel pump;
A suction filter device having a connecting pipe fitted to the suction pipe, and filtering the fuel sucked into the fuel pump;
A locking piece provided in the suction filter device;
A locking portion provided on the pump holder, for locking the locking piece to prevent the suction filter device from coming off the fuel pump;
A fuel supply device comprising:   2. The fuel supply device according to claim 1, wherein the locking portion locks the locking piece to prevent rotation of the suction filter device with respect to the fuel pump having the suction pipe as a rotation center axis. The suction pipe is provided at a lower portion of the fuel pump;
The connecting pipe is provided in an upper part of the suction filter device,
The locking piece is provided integrally with the connecting pipe,
The pump holder includes an insertion portion into which the fuel pump is inserted from above, and a bottom wall portion that supports the lower end portion of the fuel pump that is inserted into the insertion portion, while the locking portion is formed on the upper surface. And an opening that allows the connection pipe to be inserted from below and allows the locking piece to pass therethrough. Fuel supply device.

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