JP5739245B2 - Fuel filter - Google Patents

Description

  The present invention relates to a fuel filter attached to a fuel filler port of a fuel filler pipe connected to a fuel tank.

  Fuel supply to the fuel tank of the work vehicle is performed by pouring fuel from a fuel container such as a polytank into a fuel supply pipe connected to the fuel tank main body. Usually, a filter for filtering fuel to be supplied is attached to the fuel filler opening. In such a configuration, when a large amount of fuel is poured into the fuel filler port, the filter is blocked by the fuel, and the air passage for allowing the air in the fuel tank to escape to the outside may be closed. In this case, not only fuel cannot be supplied smoothly to the fuel tank, but also there is a possibility that fuel will blow out from the fuel filler port when the air passage again communicates with the outside.

  In response to the above-described problem, there is a configuration in which an air vent pipe is provided between the fuel filler opening and the fuel tank main body to connect both of them separately from the fuel filler pipe (see Patent Document 1). Further, there is a configuration in which a part of the oil supply pipe bulges outward and this bulged portion is used as an air passage (see Patent Document 2).

Japanese Utility Model Publication 2-8819 JP 2002-192964 A

  However, in the configuration of Patent Document 1, since an air vent pipe is added separately from the fuel supply pipe, the cost increases and the appearance around the fuel tank is also impaired due to the presence of the air vent pipe. Further, in the configuration of Patent Document 2, a new process is required for a part of the oil supply pipe, resulting in an increase in cost.

  An object of the present invention is to provide a fuel filter capable of smoothly removing air from a fuel tank body without processing a fuel supply pipe.

A first characteristic configuration of a fuel filter according to the present invention is a fuel filter attached to a fuel filler port of a fuel filler pipe connected to a fuel tank,
A cylindrical main body provided with a filter part that allows passage of fuel, and a holding part that holds the main body part in the fuel filler port,
The holding portion is provided on the outer periphery of the main body portion so as to form an air passage between the outer peripheral surface of the main body portion and the inner peripheral surface of the oil supply pipe, and communicates with the air passage. Has vents attached ,
Blocking the tip of the nozzle from contacting the bottom of the main body when the filter is formed on at least the outer peripheral surface of the main body and the fuel supply nozzle is inserted into the main body. Part is provided in the main body,
The blocking part is a rib provided in the filter part along the longitudinal direction inside the main body part,
The end of the rib that blocks the tip of the nozzle is on the holding unit side of the filter unit, and the circumferential direction of the main body part of the partition unit provided in the filter unit And is located between the partition portion closest to the holding portion.

[Operation] The fuel filter can supply fuel to the fuel tank from the main body provided with the filter portion, and is held at the fuel supply port of the fuel supply pipe by the holding portion provided on the outer periphery of the main body. The holding portion is provided on the outer periphery of the main body so that an air passage is formed between the outer peripheral surface of the main body and the inner peripheral surface of the oil supply pipe, and is connected to the air passage and has a mesh attached thereto. Since the air vent is provided, the air passage can be formed between the outer peripheral surface of the main body and the inner peripheral surface of the fuel supply pipe only by attaching the fuel filter to the fuel supply pipe.

With this configuration, when the fuel is supplied to the fuel tank through the filter unit, the region through which the fuel passes and the region through which the air passes can be surely partitioned, so that the air in the fuel tank body can be smoothly supplied. Can be pulled out.
When the fuel supply nozzle is inserted to the back of the fuel filter close to the bottom of the main body, the region through which the fuel passes through the filter is limited to the vicinity of the bottom of the main body. In such a case, for example, if dust accumulates in the filter part at the bottom of the main body part, the fuel does not pass smoothly through the filter, or the tip of the nozzle is blocked, making it difficult to supply fuel, and the fueling time is reduced. In addition to being longer, fuel can overflow from the body during refueling.
However, as in this configuration, when the filter part is formed on the outer peripheral surface of the main body part and the fuel supply nozzle is inserted into the main body part, the tip of the nozzle contacts the bottom part of the main body part. If the main body is provided with a blocking portion that prevents the fuel from flowing, a sufficient gap can be secured between the tip of the nozzle and the bottom of the main body, so that fuel can be reliably supplied from the filter portion on the outer peripheral surface of the main body. be able to.

  According to a second characteristic configuration of the fuel filter according to the present invention, the main body is concentrically attached to the holding portion so that the main body is positioned at the center of the fuel supply pipe in a sectional view of the fuel supply pipe. There is a point.

[Operation] When the main body is attached concentrically to the holding section so that the main body is positioned at the center of the oil supply pipe in a sectional view of the oil supply pipe, the air passage is secured over the entire outer peripheral surface of the main body. be able to. Thereby, for example, when the fuel supply pipe is inclined, even if the fuel supplied flows out from a biased position on the outer peripheral surface of the main body, a ventilation path is provided on the side where the fuel does not flow out of the outer peripheral surface of the main body. Will be formed reliably. Therefore, it becomes easier for air in the fuel tank to escape during refueling.

It is a right view of a riding rice transplanter. It is a front top view of a riding rice transplanter. It is a top view which shows the structure of a fuel tank. It is a side view which shows the structure of a fuel tank. It is a perspective view which shows the filter for fuel installed in the oil supply pipe | tube. It is a figure which shows the filter for fuel installed in the fuel supply pipe, Comprising: (a) is a top view, (b) is a longitudinal cross-sectional view. It is a longitudinal cross-sectional view of the filter for fuels. It is a figure which shows the filter for fuels of 2nd Embodiment installed in the fuel supply pipe, Comprising: (a) is a top view, (b) is a longitudinal cross-sectional view. It is a longitudinal cross-sectional view which shows the filter for fuels of 3rd Embodiment installed in the oil supply pipe | tube.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, in the riding rice transplanter, for example, a fuel tank 2 is mounted below the riding portion 1. As shown in FIGS. 3 and 4, a fuel supply pipe 4 is connected to a connection port 3 formed at a portion where the side plate and the top plate of the fuel tank 2 are in contact with each other. The oil supply pipe 4 extends horizontally toward the side of the machine body and extends obliquely rearward and upward. The upper portion of the oil supply pipe 4 is supported by a frame 7 of the machine body via a mounting bracket 8, and the oil supply port 5 formed at the upper end of the oil supply pipe 4 is provided with a screw-type cap 6 that can be freely opened and closed. .

  As shown in FIG. 5, a fuel filter 10 that filters fuel supplied from the fuel filler port 5 is installed inside the fuel filler port 5. For example, a fuel supply nozzle 20 is inserted into the fuel filter 10 to supply fuel to the fuel tank 2.

  As shown in FIGS. 5, 6 (a), and 6 (b), the fuel filter 10 includes a cylindrical main body portion 12 having a filter portion 11 that allows passage of fuel on the outer peripheral surface and the bottom surface, and a main body. And a holding portion 13 that holds the portion 12 in the fuel filler opening 5. The holding portion 13 is formed in a bowl shape on the outer periphery of the upper end of the main body portion 12. A receiving seat 5a that extends partially inward is formed on the inner surface of the fuel filler opening 5, and the outer peripheral edge 13a of the holding portion 13 of the fuel filter 10 is received and supported on the receiving seat 5a. 10 is configured to be mounted in the oil supply pipe 4.

  The main body portion 12 is provided with the filter portion 11 with the partition portion 14 interposed between the entire lower circumferential direction and the bottom portion 12a. In the bowl-shaped holding part 13, a vent hole 15 is provided in a state where the partition part 16 is interposed in a part excluding the inner peripheral part 13 b which is a part continuous with the outer peripheral edge 13 a and the main body part 12. When such a fuel filter 10 is attached to the oil supply port 5 of the oil supply pipe 4, an air passage P is formed between the outer peripheral surface of the main body 12 and the inner peripheral surface of the oil supply pipe 4 by the air vent 15 of the holding part 13. Is done. By forming the air passage P in the fuel supply pipe 4, when the fuel is supplied to the fuel filter 10, the air passage in the height of the main body 12 is replaced with the air in the fuel tank 2 and the external air. It tends to occur at P. As a result, the air in the fuel tank 2 can be smoothly drawn out.

  The vent hole 15 formed in the holding part 13 may remain open when forming the vent path P, but in the present embodiment, it is configured with a mesh attached as in the filter part 11. Thus, if the ventilation hole 15 is comprised with a mesh, it can prevent that dust etc. enter from the ventilation hole 15 formed in the holding | maintenance part 13 at the time of oil supply.

As shown in FIG. 6A, the fuel filter 10 is formed by concentrating the main body portion 12 on the holding portion 13 so that the main body portion 12 is positioned at the center of the oil supply tube 4 in a cross-sectional view of the oil supply tube 4. It is attached to. That is, the center of the main body portion 12 and the holding portion 13 is the point O. With this configuration, in the fuel filter 10, the fuel can be supplied to the fuel tank 2 while passing the fuel from the filter portion 11 of the main body portion 12 toward the periphery of the main body portion 12. Further, when the main body 12 is attached concentrically to the holding section 13 so that the main body 12 is positioned at the center of the oil supply pipe 4 in a cross-sectional view of the oil supply pipe 4, the ventilation path P is formed on the outer peripheral surface of the main body 12. It can be ensured throughout.
Thereby, for example, when the fuel supply pipe 4 is inclined, even if the fuel supplied flows out of a biased position on the outer peripheral surface of the main body 12, the fuel does not flow out of the outer peripheral surface of the main body 12. As a result, the air passage P is reliably formed. Therefore, it becomes easy for the air in the fuel tank 2 to escape to the outside during refueling.

As shown in FIG. 7, ribs 17 and 17 are erected inside the main body portion 12 of the fuel filter 10 at positions facing the inner surface in a state where the central portion is spaced from the bottom portion 12 a. The ribs 17, 17 are blocking portions for blocking the tip of the fuel supply nozzle 20 from contacting the bottom 12 a of the main body 12.
As shown in FIG. 7, the end portion 17 a on the holding portion 13 side of the rib 17 that blocks the tip portion of the nozzle 20 is separated from the end portion 11 a on the holding portion 13 side of the filter portion 11 and the partition provided in the filter portion 11. The part 14 is located between the partition part 14 (14 a) along the circumferential direction of the main body part 12 and closest to the holding part 13.

  When the fuel supply nozzle 20 is inserted deep into the fuel filter 10 near the bottom 12a of the main body 12, the area of the filter 11 through which the fuel passes is limited to the vicinity of the bottom 12a of the main body 12 and becomes smaller. At this time, if dust accumulates in the filter portion 11 of the bottom portion 12a of the main body portion 12, the fuel does not smoothly pass through the filter portion 11, or the tip end portion of the nozzle 20 is blocked and the fuel is supplied. It becomes difficult and not only the refueling time becomes long, but also the fuel may overflow from the main body 12 during refueling.

However, if the ribs 17, 17 are provided inside the main body 12 as blocking portions that prevent the tip of the nozzle 20 from contacting the bottom 12 a of the main body 12 as in this configuration, the main body of the nozzle 20 The insertion into the portion 12 is up to the position of the upper end of the ribs 17 and 17 which are blocking portions.
As a result, a sufficient gap can be secured between the tip of the nozzle 20 and the bottom 12 a of the main body 12, so that fuel can be reliably supplied from the filter portion 11 on the outer peripheral surface of the main body 12.
In particular, as shown in FIG. 7, when the filter part 11 of the main body part 12 is formed up to the position of the upper end of the ribs 17, 17, the filter part 11 is not blocked by the side surface of the nozzle 20, Is supplied to the fuel tank 2 through the filter unit 11 in a wide range. Therefore, the fuel supply to the fuel tank 2 is smooth, and the fuel is less likely to overflow from the main body 12 during refueling.
Moreover, the effect which reinforces the main-body part 12 by forming the ribs 17 and 17 in the partition part 14 of the filter part 11 is also acquired.

  The fuel supply pipe 4 connected to the fuel tank 2 includes a pipe portion that is horizontal with respect to the fuselage because the fuel supply port 5 is located on the side of the fuselage with respect to the fuel tank 2 arranged at the lower part of the fuselage. It may be formed in a letter shape. In that case, not only the fuel does not flow easily in the horizontal pipe part, but the refueled fuel may accumulate in the horizontal pipe part. In such a case, the oil supply pipe 4 is flexible, and is attached to the frame 7 of the riding portion 1 so that the oil supply port 5 is lifted via the attachment fitting 8 so that the support position of the oil supply port 5 is raised upward. It is preferable to incline the horizontal pipe portion of the oil supply pipe 4 downward. If it carries out like this, a fuel supply path will come down to the direction of the fuel tank 2 from the fuel supply port 5, and the flow of the fuel in a fuel supply path | route can be made smooth.

  The main body 12 of the fuel filter 10 may be entirely composed of metal or plastic, including the filter 11, or may be configured by attaching a metal mesh to a plastic frame, for example.

[Embodiment 2]
As shown in FIG. 8, in the fuel filter 10 of the present embodiment, the center O ′ of the main body 12 is provided at a position eccentric with respect to the center O of the holding part 13 in plan view. A part of the outer periphery of the main body 12 is close to a part of the inner periphery of the oil supply pipe 4. By disposing the main body portion 12 at a position eccentric with respect to the holding portion 13 in plan view, a portion 13A having a large area of the vent hole 15 and a portion 13B having a small area of the vent hole 15 are formed in the holding portion 13. Is done.

  In this way, the air passage P is reliably secured between one of the inner surfaces of the oil supply pipe 4 and the outer periphery of the main body portion 12 by the portion 13A where the region of the vent hole 15 in the holding portion 13 is large. As a result, it is possible to prevent the fuel from overflowing from the main body 12 by letting the air in the fuel tank 2 escape through the air passage P. For example, when the oil supply pipe 4 is tilted, the air passage P can be easily secured in the portion 13 </ b> A where the air vent 15 in the holding part 13 is large if the main body 12 is made to follow the lower surface of the oil supply pipe 4.

[Embodiment 3]
As shown in FIG. 9, in the present embodiment, the outer peripheral surface of the main body 12 of the fuel filter 10 is formed by completely distinguishing between a region of the filter unit 11 and a region 18 where the filter unit 11 does not exist. . The fuel passes through the filter unit 11 and flows out of the outer periphery of the main body unit 12 and is supplied to the fuel tank 2. At this time, the air flow path P may be blocked by the fuel flowing out from the outer periphery of the main body 12. However, if the filter portion 11 is provided not on the entire outer periphery of the main body portion 12 but on a part of the outer periphery as in the present embodiment, the fuel does not flow out from the region 18 where the filter portion 11 does not exist. The air passage P on the outer peripheral side of the 18 is not blocked with fuel. As a result, the air passage P is reliably ensured, and fuel can be supplied to the fuel tank 2 while performing smooth air venting.

[Other embodiments]

In the above embodiment, the example in which the holding portion 13 is provided on the entire outer periphery of the main body portion 12 has been described, but the holding portion 13 may be provided on a part of the outer periphery of the main body portion 12. Moreover, the shape of the main body 12 is not limited to a cylindrical shape, and the cross section may be configured in a rectangular tube shape such as a square.

  The present invention is not limited to rice transplanters, and can be widely used in fuel tanks for various work vehicles such as tractors, combines, and construction machines.

2 Fuel tank 4 Refueling pipe 5 Refueling port 10 Fuel filter 11 Filter section
11a End part 12 of filter part on holding part side Main body part 12a Bottom part 13 Holding part
14 Partition
14a The partition part 15 of the partition part provided in the filter part along the circumferential direction of the main body part and closest to the holding part 15 Ventilation hole 17 Rib (blocking part)
17a End 20 on the holding part side of the rib that blocks the tip of the nozzle 20 Nozzle P for fuel supply Ventilation path

Claims (2)

A fuel filter attached to a fuel filler port of a fuel pipe connected to a fuel tank,
A cylindrical main body provided with a filter part that allows passage of fuel, and a holding part that holds the main body part in the fuel filler port,
The holding portion is provided on the outer periphery of the main body portion so as to form an air passage between the outer peripheral surface of the main body portion and the inner peripheral surface of the oil supply pipe, and communicates with the air passage. Has vents attached ,
Blocking the tip of the nozzle from contacting the bottom of the main body when the filter is formed on at least the outer peripheral surface of the main body and the fuel supply nozzle is inserted into the main body. Part is provided in the main body,
The blocking part is a rib provided in the filter part along the longitudinal direction inside the main body part,
The end of the rib that blocks the tip of the nozzle is on the holding unit side of the filter unit, and the circumferential direction of the main body part of the partition unit provided in the filter unit A fuel filter that is located between the partition portion and the partition portion closest to the holding portion .   2. The fuel filter according to claim 1, wherein the main body portion is concentrically attached to the holding portion so that the main body portion is positioned at the center of the fuel supply pipe in a cross-sectional view of the fuel supply pipe.

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