JP4749319B2 - Fuel filter in fuel supply device - Google Patents

Description

  The present invention belongs to the technical field of a fuel filter in a fuel supply device mounted on a vehicle such as a motorcycle or a four-wheeled vehicle.

  In general, in a fuel supply device mounted on a vehicle such as a motorcycle or a four-wheel vehicle, a fuel filter is provided in a fuel flow path between a fuel tank and a fuel suction portion of a fuel pump constituting the fuel supply device. There are some which are configured to be sucked into a fuel pump in a state where coarse dust or the like contained in the fuel stored in the fuel tank is filtered. By the way, in recent years, a so-called in-tank type fuel supply device provided in the fuel tank has been proposed as the fuel supply device. In this case, the fuel supply device is provided in the fuel tank, so that downsizing is required. For this reason, it is a problem to reduce the arrangement space of the fuel filter disposed in the fuel suction portion of the fuel pump.

By the way, as for a fuel filter, it is known that securing a large surface area (filtration area) will improve filtration performance and durability. For this reason, as a measure for improving the surface area of the fuel filter and reducing the installation space, the long fuel filter is folded in half with a gap between them to form a laminated state. The ones that have been set up are proposed.
JP 2002-303217 A

  However, the conventional one has a configuration in which a long fuel filter is simply folded in half in a predetermined arrangement space. For this reason, when incorporating a fuel filter in a narrow arrangement space, the shape of the material of the fuel filter may be difficult to maintain, and it is difficult to maintain a state in which there is a gap between the two folded states. Depending on the state of incorporation, the planned surface area may not be ensured, and even if the air gap exists and the air filter is assembled in a folded shape, the fuel filter deforms during use and the air gap becomes It is assumed that the fuel filter will disappear, and if this is the case, there is a problem that the performance of the fuel filter deteriorates or the fuel filter is consumed at an early stage, and this is the problem to be solved by the present invention.

The present invention, which was created for the purpose of solving these problems in view of the such circumstances above, the invention of claim 1, the suction passage of the fuel pump, Oh presence void portion Ida Then, when providing the long fuel filter in the laminated state by bending , the holder provided to hold the fuel filter in the laminated state is a core member built in the bag-like fuel filter. The fuel filter in the fuel supply apparatus.
According to a second aspect of the present invention, the holder is an integrated member that integrates both ends of the fuel filter, and the integrated member is provided integrally with the middle bone member. A fuel filter in the fuel supply device according to Item 1.

With the invention of claim 1 , the fuel filter can be easily assembled, and the fuel filter can be easily deformed over a long period of time, and can maintain excellent filtration performance and durability performance. Can be a pump.
According to the invention of claim 2, the number of parts can be reduced, and the assembling work can be further simplified.

Next, a first embodiment of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a fuel pump that constitutes a fuel supply device, and the fuel pump 1 is configured in an in-tank type that is attached via a holder 2b provided integrally with a bottom piece 2a of the fuel tank 2. Yes.
The fuel pump 1 includes a pump part P positioned below and a motor part M above the pump part P. The motor part M and the pump part P are connected to a cylindrical yoke 3. The upper end of the yoke 3 is caulked with a ring-shaped upper bracket 4.

  Reference numeral 5 denotes an armature constituting the motor unit M, and an upper end portion of an armature shaft (motor shaft) 6 constituting the armature 5 is rotatably supported by the upper bracket 4. On the other hand, the lower end portion 6a of the armature shaft 6 passes through a through hole 7a formed in the shaft core portion of the ring-shaped lower bracket 7 fixed to the lower end portion of the yoke 3 so as to constitute the pump portion P. The bearing 7b disposed in the through hole 7a is rotatably supported. The armature 5 of the motor unit M is set to rotate in the yoke 3 when the coil 5a wound around the armature 5 is excited by the supply of external power.

The outer peripheral edge of the lower bracket 7 is caulked to the lower edge 3a of the yoke 3 together with the outer peripheral edge of the pump bracket 8 arranged in abutting manner below the lower bracket 7. The lower bracket 7 and the pump bracket 8 constitute a pump part P.
A concave portion 7c that opens downward is formed on the lower surface of the lower bracket 7, and the pump bracket 8 is abutted against the opening-side end surface of the concave portion 7c. Thus, a pump chamber PR corresponding to the recess 7c is formed. And the lower end part 6a of the said armature shaft 6 penetrates the through-hole 7a of the lower side bracket 7, and protrudes below, The projecting end part has reached in the said pump chamber PR, This pump chamber PR A disk-shaped impeller 9 having a blade portion 9a formed at the outer peripheral edge is key-fitted to the projecting lower end portion 6a of the armature shaft so as to pass through and be supported in a non-rotating manner. Accordingly, the impeller 9 of the pump part P is set to rotate as the motor part M is driven.

Further, on the outer diameter side of the concave portion 7c of the lower bracket 7, a ring-shaped concave portion 7d that is a fuel flow path is formed facing the blade portion 9a of the impeller 9, and communicated with the ring-shaped concave portion 7d. Thus, a motor part-side discharge part 7e penetrating in the vertical direction and communicating between the motor part M and the pump part P is established. On the other hand, the upper surface of the pump bracket 8 is formed with a recess 8a that protrudes into the pump chamber PR and loosely fits the lower end portion 6a of the armature shaft 6 that supports the impeller 9 in a non-rotating manner, and the impeller blade portion 9a. A ring-shaped concave portion 8b serving as a fuel flow path is formed facing the (lower bracket ring-shaped concave portion 7e). Further, a cylinder hole-shaped fuel suction portion 8c that penetrates in the vertical direction and communicates with the ring-shaped recess 8b and sucks fuel is formed.
Further, the upper bracket 4 is provided with a fuel discharge portion 4a constituted by a through hole communicating in the vertical direction, and one end portion of a pipe material 4b is connected to the upper end portion of the fuel discharge portion 4a, The other end of the pipe member 4b is connected to a discharge guide path 2c formed integrally with the fuel tank 2, and is guided from the pump part P side to the motor part M side via the motor part side discharge part 7e. The discharged fuel is set so as to be discharged to the discharge guide path 2c formed below the fuel discharge portion 4a via the upper bracket fuel discharge portion 4a.
The fuel discharge part 4a is provided with a check valve 4c, and when the pressure of the fuel discharged from the fuel discharge part 4a reaches a predetermined pressure, the check valve 4c is opened to induce fuel discharge. It is set to discharge to the path 2c side.

A fuel filter 10 according to the present invention is attached to the fuel suction portion 8c formed in the pump bracket 8, and the fuel filter 10 is positioned lower than the bottom piece 2a of the fuel tank 2. Is disposed in a filter housing portion 2d formed so as to protrude. The fuel in the fuel tank 2 is configured to be filtered by being stored in the filter housing portion 2d through the fuel filter 10, and fuel is supplied from the fuel suction portion 8c facing the filter housing portion 2d. By being sucked in, the filtered fuel is sucked into the pump part P, whereby the fuel sucked into the pump part P is configured not to be mixed with coarse dust or the like.
The fuel filter 10 includes a filter main body 11 that is long and formed in a bag shape, and a middle bone member 12 that is held inside the filter main body 11. The said filter main-body part 11 is comprised using general purpose materials, such as a nonwoven fabric generally used as a material with a filter function.

On the other hand, the middle bone member 12 is formed of a flexible resin material and is not easily deformable than the filter main body portion 11 but can be bent, and has a narrow and long plate shape that is substantially the same as the long dimension of the filter main body portion 11. The main middle bone portion 12a is provided. On one plate surface of the main central bone portion 12a, a plurality of (three in the present embodiment) are provided for expanding the bag state of the bag-like filter main body portion 11 with a U-shaped cross section and increasing the surface area. ) Is integrally formed perpendicularly to the main middle bone portion 12a. Further, a through hole 11a is formed in the filter main body 11, and a joint portion 11b formed in a cylindrical shape is formed at the hole edge of the through hole 11a, and a pump is connected via the joint portion 11b. A fuel suction part 8c extending in the downward direction and formed in the part P is set so as to fit into the bag of the filter main body part 11, whereby the fuel filter 10 is held in the filter housing part 2b. It is comprised so that. The fuel suction portion 8c is located in the bag of the filter main body portion 11, and sucks the fuel filtered by the fuel filter 10 and stored in the filter housing portion 2d from the bag of the filter main body portion 11. It is configured.
In addition, a locking projection 12c that protrudes from the other face plate toward the other side is formed at one end in the longitudinal direction of the main central bone portion 12a, while the other face plate at the other end in the longitudinal direction. A locking recess 12d that locks the locking protrusion 12c is formed so as to protrude from the other face plate, and the locking protrusion 12c and the locking recess 12d are the holder of the present invention. It corresponds to.

The fuel filter 10 was inserted into the bag, which is the filter main body 11, by inserting the middle bone member 12, and the locking protrusion 12 c and the locking recess 12 d were respectively opened on the corresponding surface portions of the filter main body 11. The filter main body part is made to protrude (exposed) from the inside of the bag through the protrusion hole, and the one face plate of the main central bone part 12a faces the outside and the other face plate faces the inside. 11 is formed in a laminated state by folding it together with the middle bone member 12. In this case, the fuel filter 10 is formed in a stacked posture in which a gap is formed between the two folds so that the inner sides of the filter main body 11 do not contact each other. Here, the stacking posture in which such a void portion exists is set so as to be held based on the fact that the middle bone member 12 is formed of a material that is more difficult to deform than the filter main body portion 11. Further, in the fuel filter 10 of the present embodiment, the locking projections 12c and the locking recesses 12d formed on the middle bone member 12 are locked, so that the ends of the stacked filter main body portions 11 are connected to each other. Although it is integrated so that the stacking posture does not change, the integration is performed in a state where the locking projection 12c and the locking recess 12d protrude from the filter body 11. Thus, it is possible to maintain a state in which a gap is formed between the filter main bodies 11. As a result, the fuel filter 10 is set so as to be maintained in a state in which the stacking posture with the gap portion between is maintained and the surface area of the filter main body portion 11 is ensured.
The fuel filter 10 configured as described above is accommodated in the filter accommodating portion 2d of the fuel tank 2 while maintaining the stacked posture. In the present embodiment, the filter main body portion 11 is stacked in the vertical direction. In this state, the fuel suction part 8c of the fuel pump 1 is fitted into the bag of the filter main body part 11 through the joint part 11b, and is held by the filter storage part 2d.

  In the present embodiment configured as described, when the impeller 9 of the pump part P rotates as the motor part M of the fuel pump 1 constituting the fuel supply device is driven, the fuel in the fuel tank 2 is supplied to the fuel filter 10. Is sucked into the fuel suction part 8c of the pump part P through the filter housing part 2d. In this case, the fuel filter 10 is laminated in a folded state and has a large surface area so that the filtration performance can be improved and the durability can be improved. Compactness can be achieved without securing a particularly large space. In this embodiment, since the fuel filter 10 is provided with a core member 12 that is less deformable than the filter main body 11, the filter main body 11 is stacked in a folded state with a gap between them. Can be easily assembled into the filter housing portion 2d, and there is no problem that the fuel filter 10 is deformed in the course of long-term use. The performance can be maintained, and an excellent fuel pump 1 can be provided.

  Moreover, in this structure, the filter main body 11 can be held in the posture by the middle member 12, and the locking protrusion 12c and the locking recess 12d are provided so that the locking protrusion is in a folded state in which it is folded in two. Since the portion 12c is locked to the locking recess 12d to be in an integrated state, the stacked posture is reliably maintained, and the function of the fuel filter 10 can be more reliably exhibited over a long period of time.

  Further, in this device, the locking projection 12c and the locking recess 12d, which are holding tools, are integrally formed on the middle bone member 12 having the fuel filter posture holding function, thereby reducing the number of parts. In addition, it is easy to attach to the filter body 11, and the fuel filter 10 can be incorporated with good workability.

Of course, the present invention is not limited to the above-described embodiment, and may be the second embodiment shown in FIG.
As in the first embodiment, the fuel filter 13 of the present embodiment includes a long bag-like filter main body 14, main and auxiliary middle bone portions 15 a and 15 b, locking protrusions 15 c, and locking recesses. 15d is provided, and in this structure, the stacking direction of the filter main body portion 14 is stacked in the front-rear direction. The stacking direction may be any direction. And in this thing, the side surface of the filter main-body part 14 will oppose with respect to the fuel suction part of a pump part, and the joint part 16 is arrange | positioned in the side surface part in the shape of a protrusion.

Further, a third embodiment shown in FIGS. 3 and 4 can be used.
In the fuel filter 17 of the present embodiment, a middle bone member 19 is inserted and disposed from one end in the longitudinal direction of a long bag-like filter main body 18. Further, the filter body 18 is formed with an edge 18a that is formed in a single sheet on all four sides, and the edge 18b on the other end side in the longitudinal direction of these edges 18a is formed long. A locking hole 18c is formed in the other end side edge 18b.
The intermediate member 19 is formed with a rectangular integrated part 19a, and the bag-like one end edge of the filter main body part 18 is integrated with the integrated part 19a in an outer fitting shape. As the middle bone member 19 and the filter main body 18 are integrated, the integrated portion 19a expands the bag-like portion of the filter main body 18 to increase the surface area of the filter main body 18 and, as will be described later. When the filter main body 18 is folded in half, a gap is formed in the inner portion of the filter main body 18 folded in half. Further, the main body 19b, which has a length in the longitudinal direction shorter than half of the length in the longitudinal direction of the filter main body 18, is provided in the portion of the central bone member 19 that is housed in the filter main body 18; A secondary middle bone portion 19c perpendicular to the bone portion 19b is formed. Further, a cylindrical joint portion 19d is integrally formed in the integrated portion 19a so as to protrude (expose) to the outside of the filter body portion 18, and a through hole 19e communicating with the joint portion 19d is opened. Thus, the joint portion 19d and the inside of the bag of the filter main body portion 19 are configured to communicate with each other. Further, the joint portion 19d is formed so that the opening 19f, which is a cylindrical hole, faces upward by being bent into an L-shape, but the locking receiving piece 19g protrudes on the side surface on the protruding side of the joint portion 19d. Are integrally formed.

  The fuel filter 17 is folded in half at a portion facing the end portion of the middle bone member 19 inserted into the bag to form a stacked posture, and further, the other end side of the filter body portion 18. The filter body portion is formed by bending the edge portion 18b upright and inserting and engaging the engagement receiving piece 19g of the middle bone member 19 into the engagement hole 18c formed in the other end side edge portion 18b. It is comprised so that 18 bi-folding attitude | positions (lamination | stacking attitude | position) may be hold | maintained, and the said locking hole 18c and the latching receiving piece 19g are equivalent to the holder of this invention. In this case, the filter main body 18 is provided with a rectangular integrated portion 19a in the intermediate bone member 19 that is difficult to be deformed, so that a void is formed between the two folds, and the surface area is increased. The latch receiving piece 19g is held by being latched in the latch hole 18c.

Furthermore, it is also possible to use an external fitting member such as a net that is externally fitted in a state where the filter main body portions are stacked as a holder for holding the filter main body portion in a stacked posture.
In addition, as a means for providing a stacking posture with a gap between the filter main body portions, an unevenness is formed on one surface of the filter main body portion, and the surface on the unevenness forming side is inwardly folded. It is good also as composition to do.

It is a partial cross section front view of a fuel pump. FIGS. 2A and 2B are a plan sectional view and a side view, respectively, of the fuel filter according to the second embodiment. FIGS. 3A and 3B are a plan view and a partial cross-sectional side view, respectively, of the fuel filter according to the third embodiment. 4A and 4B are a perspective view of a middle bone and a perspective view of a fuel filter in the third embodiment, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel pump 2 Fuel tank 5 Armature 6 Armature shaft 7 Lower bracket 8 Pump bracket 8c Fuel suction part 9 Impeller 10 Fuel filter 11 Filter body part 12 Middle bone member 12a Main middle bone part 12c Locking protrusion 12d Locking recess

Claims (2)

The suction passage of the fuel pump, Oh Upon providing the elongated fuel filter as stacked folded to exist a gap portion in Ida, a holder is provided for holding the fuel filter in the stacked state, the bag-like A fuel filter in a fuel supply device, wherein the fuel filter is a core member built in the fuel filter. The fuel supply according to claim 1 , wherein the holder is an integrated member that integrates both end portions of the fuel filter, and the integrated member is provided integrally with the middle bone member. Fuel filter in the device.

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