JP2018114872A - Inlet part structure of filler pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inlet part structure of a filler pipe which can secure an atmosphere passage in an inlet part of the filler pipe and enables reduction of the number of components.SOLUTION: A retainer 20 and a filler neck 30 are attached to an inlet part 11 of a filler pipe 10, and the retainer 20 has a welding part 26 and a retainer atmosphere passage 24. The filler neck 30 has: a filler neck body part 31; a filler pipe attachment part 37 which is formed at a lower part of the filler neck body part 31 and to which the filler pipe 10 is attached; and a filler neck upper plate part 32 which is formed at an upper part of the filler neck body part 31 and to which the retainer 20 is attached. The filler neck upper plate part 32 has a filler neck atmosphere passage 33 communicating with the retainer atmosphere passage 24; and a filler neck welding groove 35 welded to the welding part 26 of the retainer 20.SELECTED DRAWING: Figure 5

Description

The present invention relates to a filler pipe inlet portion structure for injecting fuel from a vehicle body filler port into a fuel tank.

As shown in FIG. 15, a filler pipe 110 is attached to inject fuel from a fuel filler port 3 provided in the vehicle body 2 into a fuel tank 1 for an automobile.
Further, the fuel tank 1 is provided with a canister 160 so as not to release the fuel evaporative gas generated in the fuel tank 1 to the outside. The canister 160 is connected to the inlet 111 of the filler pipe 110 to supply air. A tip of the atmospheric flow pipe 150 is attached (see, for example, Patent Document 1).
At this time, a filler neck 130 having an air filter is attached to the tip of the atmospheric flow path pipe 150 that sends air to the canister 160 so that dust, water, and the like do not enter the atmospheric flow path pipe 150.

  As shown in FIG. 16, the inlet portion 211 of the filler pipe 210 covers an air flow path pipe 250 that sends air to the canister 160, a filter member 230 that incorporates an air filter 231, and an air introduction path. Some have a resin cover 220, and the number of parts is large (for example, refer to Patent Document 2).

Furthermore, as shown in FIGS. 17 and 18, the filler pipe 310 is also formed of a synthetic resin. However, the tip 331 of the filler neck 330 attached to the tip of the filler pipe 310 has a threaded portion 321 for attaching a fuel cap (not shown) and a seal surface 322 abutting against the fuel cap for ensuring rigidity and sealing performance. Some use a metal retainer 320.

A resin cover 320 that forms an air introduction path is also attached to the filler neck 330 at the tip 331 of the filler neck 330. Further, a nozzle guide 340 for holding the tip of the fuel gun is also attached inside the filler neck 330.
Although it is desired to reduce the number of parts by integrating these parts, it is difficult to integrate these parts because the shape of the air introduction path and the like is complicated. It was.

JP 2011-256760 A JP 2009-156103 A

Therefore, the present invention aims to provide an inlet portion structure of a filler pipe that can secure an air flow path at the inlet portion 111 of the filler pipe 110 and reduce the number of parts.

In order to solve the above problems, the present invention of claim 1 is directed to a filler pipe inlet portion structure for injecting fuel from a vehicle body fuel filler port to a fuel tank.
A synthetic resin retainer and a synthetic resin filler neck are attached to the inlet of the filler pipe.
The retainer has a cylindrical retainer main body, a filler neck formed on the lower portion of the retainer main body, and a welded portion to be welded, and a retainer air channel communicating with the filler neck.
The filler neck includes a cylindrical filler neck main body, a filler pipe mounting portion that is formed at a lower portion of the filler neck main body portion to attach a filler pipe, and a filler neck upper plate portion that is formed at the upper portion of the filler neck main body portion and welds a retainer. Have
The filler neck upper plate portion has a filler pipe inlet portion structure characterized by having a filler neck atmospheric flow channel communicating with the retainer atmospheric flow channel and a filler neck welding groove welded to the welded portion of the retainer.

  According to the first aspect of the present invention, in the filler pipe inlet portion structure for injecting fuel from the vehicle body filler into the fuel tank, a synthetic resin retainer and a synthetic resin filler neck are attached to the filler pipe inlet portion. ing. For this reason, the retainer and the filler neck can be formed separately, welded at the time of assembly, and integrally attached to the inlet portion of the filler pipe, and the formation of an air flow path or the like is easy.

  The retainer has a cylindrical retainer main body, a welded portion welded to a filler neck formed at a lower portion of the retainer main body, and a retainer atmospheric flow path communicating with the filler neck. For this reason, the welded portion of the retainer can be integrally formed by welding to the filler neck, and the air can be sent to the filler neck via the retainer atmospheric flow path after being integrally formed.

The filler neck includes a cylindrical filler neck main body, a filler pipe mounting portion that is formed at a lower portion of the filler neck main body portion to attach a filler pipe, and a filler neck upper plate portion that is formed at the upper portion of the filler neck main body portion and welds a retainer. Have For this reason, the filler neck which welded the retainer to the filler neck upper board part can be attached to the filler pipe by the filler pipe attaching part. The cylindrical interior of the retainer main body and the filler neck main body can be integrally communicated.

The filler neck upper plate portion has a filler neck atmospheric flow channel communicating with the retainer atmospheric flow channel, and a filler neck welding groove welded to the welded portion of the retainer. For this reason, a retainer is welded to the filler neck welding groove of the filler neck upper plate portion, and burrs at the time of welding are sealed in the filler neck welding groove, so that the retainer and the filler neck are stably and reliably welded. In addition, the retainer atmospheric flow path and the filler neck atmospheric flow path can be communicated to send the atmospheric air to the canister.

According to a second aspect of the present invention, the filler neck is a filler pipe inlet portion structure to which an air filter communicating with the filler neck atmospheric channel is attached.

  In the present invention of claim 2, the filler neck is provided with an air filter communicating with the filler neck atmospheric flow path. For this reason, it can prevent that dust, rain water, and car wash water flow in from the air flowing in from the filler neck atmospheric flow path.

According to a third aspect of the present invention, the filler neck atmospheric flow path is a filler pipe inlet portion structure formed on the outer periphery of the filler neck welding groove of the filler neck upper plate portion.

In this invention of Claim 3, since the filler neck atmospheric flow path was formed in the outer periphery of the filler neck welding groove | channel of a filler neck upper board part, a retainer and a filler neck upper board part are welded to a filler neck upper board part. An air flow path can be formed between them, and the air from the retainer air flow path can be sent to a canister attached to the outer periphery of the filler neck.

According to a fourth aspect of the present invention, the retainer atmospheric flow path of the retainer is a filler pipe inlet portion structure formed on the outer periphery of the retainer provided on the outer periphery of the retainer body.

  In this invention of Claim 4, the retainer atmospheric | air flow path of a retainer is formed in the retainer outer peripheral part provided in the outer periphery of the retainer main body. For this reason, air can be taken in from the outer peripheral surface of a retainer main body, the space for air | atmosphere intake can be made small, and the shape of a retainer can be reduced in size. In addition, the retainer atmospheric channel can be communicated with the filler neck atmospheric channel of the filler pipe.

The present invention according to claim 5 is the filler pipe inlet portion structure in which the filler neck upper plate portion is formed with an air channel discharge hole and a drain hole.

  In the fifth aspect of the present invention, the filler neck upper plate portion is formed with the air channel discharge hole and the water drain hole, so that the air flowing from the filler neck air channel to the air channel discharge hole is supplied to the air filter and the air flow. In addition to being sent to the canister via the road pipe, rain water and car wash water can be separated from the atmosphere and discharged out of the vehicle through the drain hole.

The present invention of claim 6 is a filler pipe inlet portion structure in which a nozzle guide for holding an oil supply nozzle is attached to a welded portion between a retainer and a filler neck.

  In the present invention of claim 6, since the nozzle guide for holding the oil supply nozzle is attached to the welded portion of the retainer and the filler neck, the nozzle guide can be attached at the same time when the retainer and the filler neck are welded together. At the same time, the oil supply nozzle is held by the nozzle guide, so that the oil supply operation can be performed reliably.

The present invention of claim 7 is a filler pipe inlet portion structure in which an air passage pipe mounting portion is formed on a filler neck.

  In the present invention of claim 7, since the air passage pipe mounting portion is formed in the filler neck, the air passage pipe can be attached to the filler neck, and the structure of the inlet portion of the filler pipe can be simplified. The air can be blown from the inlet of the filler pipe to the canister or the like.

Since the filler neck has a filler neck upper plate portion, the filler neck in which a retainer is welded to the filler neck upper plate portion can be attached to the filler pipe by the filler pipe attachment portion.
Since the filler neck upper plate part has a filler neck atmospheric channel communicating with the retainer atmospheric channel and a filler neck welding groove welded to the retainer, the retainer is welded to the filler neck upper plate part to prevent burrs during welding. It is sealed in the filler neck welding groove to stably and reliably weld the retainer and filler neck. Further, the retainer atmospheric flow path and the filler neck atmospheric flow path can be communicated with each other to send the air to the canister.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention and is a front view of a state in which a retainer, a filler neck, and a nozzle guide are assembled. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention and is a side view of a state in which a retainer, a filler neck, and a nozzle guide are assembled. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention and is a plan view of a state in which a retainer, a filler neck, and a nozzle guide are assembled. FIG. 4 shows an embodiment of the present invention, and is a cross-sectional view of a state in which a retainer, a filler neck, and a nozzle guide are assembled, and is a cross-sectional view along the line AA in FIG. 3. FIG. 4 shows an embodiment of the present invention, and is a cross-sectional view of a state in which a retainer, a filler neck, and a nozzle guide are assembled, and is a cross-sectional view along the line BB in FIG. 3. The embodiment of the present invention is shown and it is a front view of a retainer. The embodiment of the present invention is shown and it is a side view of a retainer. The embodiment of the present invention is shown and is a top view of a retainer. The embodiment of the present invention is shown and is a front view of a filler neck. The embodiment of the present invention is shown and is a side view of a filler neck. The embodiment of the present invention is shown and is a top view of a filler neck. The embodiment of the present invention is shown and it is a front view of a nozzle guide. The embodiment of the present invention is shown and is a side view of a nozzle guide. 1, showing an embodiment of the present invention, is a plan view of a nozzle guide. FIG. It is a block diagram of a fuel tank, a filler pipe, a canister, an air circulation pipe, and an air filter. It is sectional drawing of the conventional filler pipe entrance part. It is sectional drawing of the other conventional filler pipe entrance part. It is an expanded sectional view of the tip part of other conventional filler necks.

The present invention relates to a structure of an inlet portion 11 of a filler pipe 10 for injecting fuel from a vehicle body fuel filler port provided in a vehicle body to a vehicle fuel tank.
Embodiments of the present invention will be described with reference to FIGS. The filler pipe 10 can be formed of a synthetic resin or a metal. In the present embodiment, the filler pipe 10 will be described using an example of the pipe formed of a synthetic resin.

In the embodiment of the present invention, as shown in FIG. 15, the filler pipe 10 connects the fuel tank 1 and the fuel filler 3 of the vehicle body 2 and allows fuel to flow into the fuel tank 1 from the fuel filler 3.
A retainer 20, a filler neck 30 and a nozzle guide 40 which will be described later are attached to the inlet portion 11 of the filler pipe 10. An air passage pipe 50 is connected to the filler neck 30, the air passage pipe 50 is connected to the canister 60, and the canister 60 is connected to the fuel tank 1.
The breather pipe 70 is also connected to the inlet 11 of the filler pipe 10.

  When the internal pressure of the fuel tank 1 increases due to the inflow of fuel or the increase in internal temperature, the atmosphere containing the fuel evaporative gas is introduced into the canister 60, and the fuel evaporative gas is adsorbed by the adsorbent of the canister 60, so that only the atmosphere Passes through a filler neck air filter 39b of a filler neck 30, which will be described later, and is released into the atmosphere. This prevents the fuel evaporative gas from being released into the atmosphere.

  When the internal pressure of the fuel tank 1 decreases due to intake negative pressure of an engine (not shown), fuel decrease, internal temperature decrease, etc., it passes through the filler neck air filter 39b attached in the filler neck 30, The atmospheric air is introduced into the canister 60 through the atmospheric flow pipe 50, the fuel evaporative gas adsorbed by the adsorbent of the canister 60 is desorbed, and the fuel evaporative gas is combusted in the engine.

As shown in FIGS. 1 to 5, the retainer 20, the filler neck 30 and the nozzle guide 40 are integrally assembled and attached to the inlet portion 11 of the filler pipe 10.
First, the shapes of the retainer 20, the filler neck 30 and the nozzle guide 40 will be described, and the structure attached to the inlet 11 of the filler pipe 10 will be described later.

  4 to 8, the retainer 20 includes a cylindrical retainer main body 21 and a retainer outer peripheral portion 22 formed on the outer periphery of the retainer main body 21, and the retainer main body 21 and the retainer outer peripheral portion 22. A plurality of retainer atmospheric flow paths 24 penetrating in the axial direction are formed, and an inlet portion of the retainer atmospheric flow path 24 forms a retainer atmospheric intake 23.

  A retainer bottom plate portion 25 is formed at the lower end of the retainer main body portion 21 so as to extend in a disc shape in the outer peripheral direction (lateral direction in FIG. 6). A retainer welding protrusion 26 is formed on the distal end side of the retainer body 21 in the axial direction (downward in FIG. 6). The retainer welding protrusion 26 is welded to a filler neck welding groove 35 of a filler neck 30 described later.

Next, the filler neck 30 will be described with reference to FIGS. 4, 5, and 9 to 11.
The filler neck 30 includes a cylindrical filler neck main body portion 31, a filler pipe mounting portion 37 that is formed at a lower portion of the filler neck main body portion 31 and attaches the filler pipe 10, and is formed at an upper portion of the filler neck main body portion 31. It has a filler neck upper plate portion 32 to be attached.

The filler neck main body 31 has a filler neck filter attachment portion 38 formed on one outer surface, and a filler neck air filter case 39 is attached to the filler neck filter attachment portion 38. A filler neck air filter 39 b is built in the filler neck air filter case 39. Under the filler neck air filter case 39, a filler neck atmospheric flow path mounting portion 39a is provided. The filler neck air filter 39b can prevent dust, rainwater, and car wash water from flowing into the canister 60 from the atmosphere flowing in from a filler neck atmospheric flow path 33 described later.

The filler neck main body 31 has a breather pipe mounting portion 31a formed on the other outer surface. As shown in FIG. 15, a breather pipe 70 is connected to the breather pipe mounting portion 31a. The breather pipe 70 is connected to the fuel tank 1.
The cylindrical interior of the filler neck main body 31 communicates with the cylindrical interior of the retainer main body 21 to form a single cylindrical hollow portion.

As shown in FIG. 11, the filler neck upper plate portion 32 is formed with a filler neck atmospheric flow path 33 communicating with the retainer atmospheric flow path 24 and a filler neck welding groove 35 welded to the retainer 20. The filler neck welding groove 35 is formed in an arc shape, and the retainer welding protrusion 26 of the retainer 20 is welded. A filler neck standing wall 36 is formed on the inner peripheral side of the filler neck welding groove 35, and when the retainer welding protrusion 26 is welded to the filler neck welding groove 35, the welding burr is sealed in the filler neck welding groove 35. The nozzle guide 40 to be described later is positioned.

The filler neck atmospheric flow path 33 is separated from the filler neck welding groove 35 on the outer periphery of the filler neck welding groove 35 and is formed in an arc shape, and extends in an arc shape on the outer peripheral portion of the filler neck atmospheric flow path 33. The filler neck atmospheric flow path outlet path 33a is formed. A filler neck atmospheric flow passage discharge hole 34 is formed in the filler neck atmospheric flow channel outlet passage 33a. In the filler neck atmospheric flow path 33, a filler neck drain hole 34a is formed at a position away from the filler neck atmospheric flow path outlet path 33a.

When the retainer 20 is welded to the filler neck upper plate portion 32, the retainer bottom plate portion 25 covers the filler neck upper plate portion 32, and the filler neck atmospheric flow channel 33 communicates with the retainer atmospheric flow channel 24 to fill the filler neck atmospheric flow channel. The outlet channel 33a and the filler neck atmospheric channel discharge hole 34 can also communicate with each other.
The filler neck atmospheric flow passage discharge hole 34 communicates with a filler neck filter mounting portion 38 formed below the filler neck upper plate portion 32, and a filler neck air filter case 39 is mounted on the filler neck filter mounting portion 38. ing.

A filler neck air filter 39 b is built in the filler neck air filter case 39.
The air sucked from the retainer air inlet 23 passes through the retainer air flow path 24 and the filler neck air flow path 33, passes through the filler neck air filter 39b, and passes through the filler neck air flow path discharge hole 34 to the canister 60. Can be sent to.

The filler pipe attachment portion 37 is formed from the lower end opposite to the upper end where the filler neck upper plate portion 32 of the filler neck main body portion 31 is provided. On the outer peripheral surface of the filler pipe mounting portion 37, a plurality of filler pipe mounting portion protrusions 37a are formed in a circumferential shape, and the inlet portion 11 of the filler pipe 10 is inserted. A seal ring 12 is attached between the plurality of filler pipe attachment portion protrusions 37 a to ensure the sealing performance between the filler pipe 10 and the filler neck 30.

Next, the nozzle guide 40 will be described with reference to FIGS.
The nozzle guide 40 includes a cylindrical nozzle guide main body 41, a nozzle guide mounting portion 42 formed at the upper end of the nozzle guide main body 41 (upper front end in FIG. 12), and the lower end of the nozzle guide main body 41 (FIG. 12). Nozzle guide tip 43 formed at the lower tip).

When the retainer 20 and the filler neck 30 are welded, the nozzle guide mounting portion 42 is fitted into a cylindrical inner joint portion between the welded retainer 20 and the filler neck 30 so that the nozzle guide 40 can be attached to the filler neck 30. . The nozzle guide 40 can guide and hold the tip portion of an oil supply nozzle (not shown) to smoothly supply oil.

A fin portion 44 is formed on the outer surface of the nozzle guide main body portion 41, and the fin portion 44 comes into contact with the inner surface of the filler pipe mounting portion 37 of the filler neck 30 to stably hold the nozzle guide 40. it can.
In addition, a nozzle hole 45 is formed near the center of the nozzle guide body 41 so that fuel does not accumulate in the vicinity of a refueling nozzle sensor (not shown) during refueling, and the refueling nozzle sensor can be operated correctly. it can.
A nozzle stopper 46 is formed at the nozzle guide tip 43 to hold the tip of the fueling nozzle.

Next, a state in which the retainer 20, the filler neck 30, and the nozzle guide 40 are assembled will be described with reference to FIGS.
The retainer 20 and the filler neck 30 are assembled by welding the retainer welding protrusion 26 of the retainer 20 to the filler neck welding groove 35 of the filler neck 30. The retainer bottom plate portion 25 covers the filler neck upper plate portion 32, and the outer peripheral tip of the retainer bottom plate portion 25 and the outer peripheral tip of the filler neck upper plate portion 32 can be welded or bonded together.

After the welding, the retainer bottom plate portion 25 of the retainer 20 and the outer peripheral tips of the filler neck upper plate portion 32 come into contact with each other, and the filler neck atmospheric flow path 33 is formed.
As shown in FIGS. 4 and 5, the filler neck atmospheric flow path 33 is formed in communication with the retainer atmospheric flow path 24 of the retainer 20. Since the filler neck atmospheric flow path 33 is formed with a filler neck atmospheric flow path outlet path 33a communicating with the filler neck atmospheric flow path 33 as shown in FIG. The air flowing in through the air flow path 24 flows as indicated by the dotted arrows shown in FIG. 11 and reaches the filler neck air flow path discharge hole 34.

  As shown in FIG. 4, since the filler neck air flow path discharge hole 34 communicates with a filler neck air filter case 39 having a filler neck air filter 39b built therein, the atmosphere is caused by the filler neck air filter 39b. Is removed, passes through the atmospheric flow pipe 50 connected to the filler neck atmospheric flow path mounting portion 39a, and reaches the canister 60.

At this time, since the filler neck atmospheric flow path outlet path 33a and the filler neck atmospheric flow path 33 have a bent labyrinth structure, the water that has entered the filler neck atmospheric flow path 33 is indicated by a solid arrow in FIG. Thus, the gas does not enter the filler neck atmospheric channel outlet passage 33a and is discharged to the outside through the filler neck drain hole 34a.

As described above, since the retainer 20 and the filler neck 30 are separately formed and then merged, the shapes of the filler neck atmospheric flow path 33 and the filler neck atmospheric flow path outlet path 33a are easily formed from the retainer atmospheric flow path 24. It is possible to form an atmospheric flow path communicating with the filler neck air filter 39b via the flow paths.

DESCRIPTION OF SYMBOLS 10 Filler pipe 20 Retainer 24 Retainer atmospheric flow path 25 Retainer bottom plate part 26 Retainer welding protrusion 30 Filler neck 32 Filler neck upper plate part 33 Filler neck atmospheric flow path 35 Filler neck welding groove 40 Nozzle guide

Claims (7)

In the filler pipe inlet structure that injects fuel into the fuel tank from the vehicle filler port,
A synthetic resin retainer and a synthetic resin filler neck are attached to the inlet of the filler pipe,
The retainer has a cylindrical retainer main body, a welded portion that is welded to the filler neck formed at a lower portion of the retainer main body, and a retainer atmospheric channel that communicates with the filler neck.
The filler neck includes a cylindrical filler neck main body, a filler pipe mounting portion formed at a lower portion of the filler neck main body for attaching a filler pipe, and a filler formed on the filler neck main body to weld the retainer. It has a neck upper plate part,
The filler neck upper plate portion includes a filler neck atmospheric flow channel communicating with the retainer atmospheric flow channel, and a filler neck welding groove welded to a welded portion of the retainer.   The filler pipe inlet portion structure according to claim 1, wherein the filler neck is provided with an air filter that communicates with the filler neck atmospheric flow path.   The filler pipe inlet portion structure according to claim 1 or 2, wherein the filler neck atmospheric flow path is formed on an outer periphery of the filler neck welding groove of the filler neck upper plate portion. The filler pipe inlet portion structure according to any one of claims 1 to 3, wherein the retainer atmospheric flow path of the retainer is formed on a retainer outer peripheral portion provided on an outer periphery of the retainer main body. The filler pipe inlet plate structure according to any one of claims 1 to 4, wherein the filler neck upper plate part is formed with an air channel discharge hole and a water drain hole. The filler pipe inlet portion structure according to any one of claims 1 to 5, wherein a nozzle guide for holding an oil supply nozzle is attached to a welded portion of the retainer and the filler neck.   The filler pipe inlet portion structure according to any one of claims 1 to 5, wherein an air passage pipe mounting portion is formed in the filler neck.

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