JP7144655B2 - nozzle guide - Google Patents

Description

The present invention relates to a nozzle guide that guides insertion and removal of a fuel nozzle in a fuel supply device.

Conventionally, as a fuel supply device for supplying fuel to a fuel tank installed in a vehicle or the like, a filler pipe for connecting a filler port and the fuel tank and a breather pipe for discharging fuel vapor in the fuel tank have been used. is used. In the fuel supply device described in Patent Document 1, space saving and cost reduction are achieved by arranging the breather pipe inside the filler pipe.

Japanese Utility Model Laid-Open No. 61-53220

In the fuel supply device described in Patent Document 1, there is room for improvement in the assembling performance of the breather pipe. Therefore, there has been a demand for a technique capable of improving the ease of assembly of the breather pipe disposed inside the filler pipe.

The present invention can be implemented as the following modes.
[Mode 1] In a fuel supply device, a nozzle guide disposed inside a filler pipe that forms a fuel flow path for fuel supplied from a fuel nozzle, the nozzle guide having an engaging portion on its outer surface, A main body that guides insertion and removal of the fuel nozzle is connected to a breather pipe that is disposed inside the filler pipe and discharges fuel vapor in the fuel tank, thereby forming at least part of a vapor flow path for the fuel vapor. a connecting member, the connecting member having an engaged portion that engages with the engaging portion, and being engaged and fixed to the main body portion at the engaged portion, The nozzle guide, wherein the part constitutes a channel wall that forms a part of the steam channel.

(1) According to one aspect of the invention, a nozzle guide is provided. This nozzle guide is a nozzle guide arranged inside a filler pipe that forms a fuel flow path for fuel supplied from a fuel nozzle in a fuel supply device, and has an engaging portion on its outer surface, A main body that guides insertion and removal of the fuel nozzle is connected to a breather pipe that is disposed inside the filler pipe and discharges fuel vapor in the fuel tank, thereby forming at least part of a vapor flow path for the fuel vapor. and a connecting member having a to-be-engaged portion that engages with the engaging portion, the to-be-engaged portion being engaged and fixed to the main body portion. According to this aspect of the nozzle guide, the engaged portion formed on the connecting member connected to the breather pipe engages with the engaging portion formed on the outer surface of the main body, whereby the connecting member moves from the main body. is fixed in engagement with the part. In this way, since the connection member can be provided on the nozzle guide by engaging and fixing, the connection member and the main body can be easily integrated after the breather pipe is connected to the connection member. Therefore, in a so-called inner breather specification fuel supply device in which the breather pipe is arranged inside the filler pipe, the ease of assemblage of the breather pipe can be improved.
(2) In the nozzle guide of the above aspect, part of the main body may constitute a channel wall that forms part of the steam channel. According to the nozzle guide of this aspect, a part of the main body constitutes the channel wall that forms part of the steam channel, so that part of the connecting member that forms the steam channel can be omitted. Therefore, the connection member can be fixed to the outer surface of the main body to form the steam flow path while saving space.
(3) In the nozzle guide of the above aspect, the flow path wall may be configured by part of the engaging portion. According to the nozzle guide of this aspect, since the channel wall is formed by part of the engaging portion, the function of fixing the connection member to the main body and the function of forming part of the steam channel are It can also be used by the engaging portion. Therefore, the connection member can be fixed to the outer surface of the main body to form the steam flow path while saving space.
(4) In the nozzle guide of the above aspect, the body portion has a housing portion that can house at least a portion of an opening/closing member that opens and closes the fuel flow path. an insertion portion into which a tip portion is inserted; and a flow that is continuous with the insertion portion in a tank direction from a filler opening to the fuel tank and is formed with a smaller diameter than the insertion portion and forms a part of the fuel flow path. and a channel forming portion, and the channel wall may be configured by a part of the outer peripheral surface of the channel forming portion. According to the nozzle guide of this aspect, the flow path wall is formed by a part of the outer peripheral surface of the flow path forming portion which is formed with a smaller diameter than the insertion portion and which forms a part of the fuel flow path. The function of forming a part of the fuel flow channel and the function of forming a part of the steam flow channel can be shared by the flow channel forming part. can be fixed to form a steam channel.
(5) In the nozzle guide of the above aspect, the flow path wall may be formed with a guide portion that guides the flow of the fuel vapor. According to the nozzle guide of this aspect, since the guide portion for guiding the flow of the fuel vapor is formed on the flow passage wall, the turbulence of the fuel vapor can be suppressed, the pressure loss can be suppressed, and the flow of the fuel vapor can be further increased. It can be done smoothly.
(6) In the nozzle guide of the above aspect, the body portion has a housing portion that can house at least a portion of an opening/closing member that opens and closes the fuel flow path. an insertion portion into which a tip portion is inserted; and a flow that is continuous with the insertion portion in a tank direction from a filler opening to the fuel tank and is formed with a smaller diameter than the insertion portion and forms a part of the fuel flow path. and a passage forming portion, and the engaging portion may be formed in the direction of the tank when viewed from the accommodating portion. According to the nozzle guide of this form, since the engaging portion is formed in the tank direction when viewed from the accommodating portion, the connecting member can be arranged radially inside the accommodating portion. Therefore, it is possible to suppress an increase in the radial dimension of the nozzle guide for arranging the connection member.
(7) In the nozzle guide of the above aspect, the upper end portion of the connection member is located downstream of the tip portion of the fuel nozzle inserted into the main body portion in the tank direction from the fuel filler opening to the fuel tank. You may have According to the nozzle guide of this form, the upper end of the connection member is located downstream of the tip of the fuel nozzle inserted into the main body, so the tip of the fuel nozzle does not hit the inner peripheral surface of the nozzle guide. In this case, deformation and damage of the connection member can be suppressed. Therefore, it is possible to prevent the function of fixing the breather pipe to the nozzle guide from being impaired.
(8) In the nozzle guide of the above aspect, one end of the connection member is connected to the breather pipe, and the other end is provided with a discharge passage forming portion having an opening for returning the fuel vapor to the filler pipe. An extending direction in which the discharge passage forming portion is provided may form an angle of 0° or more and less than 90° with a tank direction toward the fuel tank from the filler port. According to the nozzle guide of this aspect, since the angle formed by the extending direction of the discharge passage forming portion and the tank direction is 0° or more and less than 90°, the fuel vapor is straightened toward the tank direction and discharged from the opening. can. Therefore, the fuel vapor can be circulated back to the fuel tank, and the fuel vapor can be prevented from flowing out from the filler port.
(9) In the nozzle guide of the above aspect, the angle may be 0°. According to the nozzle guide of this form, since the angle formed by the extending direction of the discharge passage forming portion and the direction of the tank is 0°, the fuel vapor can be more rectified toward the tank and discharged from the opening. Steam can be further suppressed from flowing out from the filler port.
(10) In the nozzle guide of the above aspect, the connection member may have a guide portion that guides the flow of the fuel vapor. According to the nozzle guide of this aspect, since the guide portion for guiding the flow of the fuel vapor is formed in the connection member, it is possible to suppress the turbulence of the fuel vapor, suppress the pressure loss, and make the flow of the fuel vapor smoother. can be done.
(11) In the nozzle guide of the above aspect, the engaging portion is formed with an engaging projection, and the engaged portion is formed with an engaging groove portion that engages with the engaging projection. good too. According to the nozzle guide of this aspect, the engaging projection is formed in the engaging portion, and the engaging groove portion that engages with the engaging projection is formed in the engaged portion. can be easily engaged with each other, and the assemblability of the breather pipe can be further improved.

The present invention can also be implemented in various forms. For example, it can be implemented in the form of a nozzle guide manufacturing method, a fuel supply device including a nozzle guide, or the like.

It is a schematic diagram showing a schematic configuration of a fuel supply device. FIG. 4 is a front view showing configurations of an opening forming member and a nozzle guide; FIG. 3 is a cross-sectional view showing a cross section taken along line III-III of FIG. 2; It is a perspective view which shows schematic structure of a nozzle guide. It is an exploded perspective view showing an exploded nozzle guide. It is a front view which shows schematic structure of a main-body part. It is a side view which shows schematic structure of a main-body part. It is a front view which shows schematic structure of a connection member. FIG. 6 is a cross-sectional view showing a cross section taken along line IX-IX of FIG. 5; FIG. 4 is a partial cross-sectional view for explaining the configuration of a steam flow path; FIG. 7 is a partial cross-sectional view showing the configuration of the main part of the nozzle guide of the second embodiment; It is a perspective view which shows schematic structure of the nozzle guide of 3rd Embodiment. FIG. 13 is a cross-sectional view showing a cross section taken along line XIII-XIII of FIG. 12; It is an exploded perspective view showing exploded nozzle guides of a 3rd embodiment. It is a front view which shows schematic structure of the main-body part of 3rd Embodiment. It is a side view which shows schematic structure of the main-body part of 3rd Embodiment. FIG. 11 is a front view showing a schematic configuration of a connection member according to a third embodiment; FIG. 15 is a cross-sectional view showing a cross section along line XVIII-XVIII in FIG. 14; FIG. 11 is a partial cross-sectional view for explaining the structure of a steam flow path according to a third embodiment; It is a perspective view which shows schematic structure of the nozzle guide of 4th Embodiment. 21 is a cross-sectional view showing a cross section taken along line XXI-XXI of FIG. 20; FIG. It is an exploded perspective view showing exploded nozzle guide of a 4th embodiment. It is a front view which shows schematic structure of the main-body part of 4th Embodiment. It is a side view which shows schematic structure of the main-body part of 4th Embodiment. It is a front view which shows schematic structure of the connection member of 4th Embodiment. FIG. 23 is a cross-sectional view showing a cross section along line XXVI-XXVI of FIG. 22; FIG. 11 is a partial cross-sectional view for explaining the configuration of a steam flow path according to a fourth embodiment;

A. First embodiment:
FIG. 1 is a schematic diagram showing a schematic configuration of a fuel supply device 100 to which a nozzle guide 10 as one embodiment of the invention is applied. The fuel supply device 100 is mounted on a vehicle and supplies fuel discharged from a fuel nozzle 150 inserted into a fuel filler port FC to a fuel tank FT. In the following description, the side of the filler pipe 110 where the filler port FC is provided is also called the upstream side, and the side where the fuel tank FT is provided is also called the downstream side. Further, the direction from the filler port FC to the fuel tank FT when viewed macroscopically, that is, the direction from the upstream side to the downstream side is also referred to as a "tank direction TD." The fuel supply device 100 includes a filler pipe 110 , a breather pipe 120 , an opening forming member 130 and a nozzle guide 10 . In FIG. 1, for convenience of illustration, the upstream end 112 of the filler pipe 110 and the fuel tank FT are shown in a sectional view, and the other structures are shown in an external view. Also, the fuel nozzle 150 is indicated by a chain double-dashed line.

Filler pipe 110 is made of a flexible resinous pipe, and forms a fuel flow path for fuel supplied from fuel nozzle 150 (hereinafter also simply referred to as “fuel flow path 210”). The upstream end 112 of the filler pipe 110 is connected to the opening forming member 130 as described later. A downstream end 114 of the filler pipe 110 is connected to the fuel tank FT. The downstream end 114 of the filler pipe 110 is provided with a check valve 116 that suppresses backflow of fuel. The check valve 116 opens when fuel is supplied from the fuel nozzle 150, and closes when the liquid level of the fuel stored inside the fuel tank FT rises and submerges. FIG. 1 shows check valve 116 in a closed state.

Breather pipe 120 is arranged inside filler pipe 110 . Breather pipe 120 forms a vapor flow path (hereinafter also simply referred to as "vapor flow path 220") for discharging fuel vapor inside fuel tank FT. The breather pipe 120 returns the fuel vapor to the fuel flow path 210 and releases the internal pressure of the fuel tank FT. An upstream end 122 of the breather pipe 120 is connected to the nozzle guide 10 as described later. A downstream end 124 of the breather pipe 120 is exposed inside the fuel tank FT. An opening 125 is formed in the downstream end 124 . The opening 125 is formed at a height that matches the full tank level of the fuel tank FT. An on-off valve 126 is provided at the downstream end 124 . When the liquid level of the fuel stored inside the fuel tank FT falls below the level of the on-off valve 126, the on-off valve 126 is opened by its own weight, and the fuel mixed in the breather pipe 120 is discharged to the inside of the fuel tank FT. In addition, when the liquid level of the fuel stored inside the fuel tank FT rises, the on-off valve 126 is closed by buoyancy to prevent fuel from entering the breather pipe 120 during refueling. FIG. 1 shows the on-off valve 126 in a closed state.

FIG. 2 is a front view showing the configuration of the opening forming member 130 and the nozzle guide 10. FIG. FIG. 2 corresponds to the A view in FIG. In FIG. 2, for convenience of illustration, the upstream end 112 of the filler pipe 110 and the upstream end 122 of the breather pipe 120 are indicated by two-dot chain lines. FIG. 3 is a cross-sectional view showing a cross-section taken along line III--III in FIG. In FIG. 3, for convenience of illustration, the position of fuel nozzle 150 during fueling is indicated by a two-dot chain line, and lid member 132 and open/close member 134 in the closed state are indicated by dashed lines. 3, illustration of the filler pipe 110 and the breather pipe 120 is omitted.

As shown in FIG. 3, the opening forming member 130 has a substantially cylindrical external shape and forms a supply port 131 into which the fuel nozzle 150 is inserted. The opening forming member 130 is also called capless, and opens and closes the supply port 131 without using a fuel cap. The opening forming member 130 has a lid member 132 , an opening/closing member 134 and a pipe connecting portion 136 . The nozzle guide 10 is connected to the downstream end of the opening forming member 130 .

The lid member 132 is provided at the upstream end of the opening forming member 130 and opens and closes the supply port 131 . The lid member 132 blocks the supply port 131 to prevent foreign matter from entering from the fuel filler port FC, and opens the supply port 131 by being pushed by the tip portion 152 of the fuel filler nozzle 150 during fueling. . The lid member 132 is accommodated inside the opening forming member 130 in a state where the supply port 131 is opened.

The opening/closing member 134 is provided at the downstream end of the opening forming member 130 to open and close the fuel flow path 210 . The opening/closing member 134 is normally closed to prevent fuel vapor from flowing out of the fuel supply device 100 . The opening/closing member 134 opens the fuel flow path 210 by being pushed by the tip portion 152 of the fuel nozzle 150 during fueling. The opening/closing member 134 is housed in a housing portion 23 of the nozzle guide 10, which will be described later, during refueling.

The pipe connecting portion 136 is formed on the outer peripheral surface of the opening forming member 130 . The pipe connecting portion 136 has a plurality of protrusions 137 protruding radially outward, and has a so-called fir-tree shape. As shown in FIG. 2, the pipe connection 136 is press fit into the upstream end 112 of the filler pipe 110 .

FIG. 4 is a perspective view showing a schematic configuration of the nozzle guide 10. As shown in FIG. FIG. 5 is an exploded perspective view showing the nozzle guide 10 in an exploded manner. The nozzle guide 10 is connected to the downstream end of the opening forming member 130 as shown in FIG. 3, and arranged inside the filler pipe 110 as shown in FIG. The nozzle guide 10 has a function of guiding the insertion and removal of the fuel nozzle 150 to stabilize the fuel supply and a function of fixing the breather pipe 120 . In this embodiment, the nozzle guide 10 and the opening forming member 130 are fixed to each other by welding. Although the nozzle guide 10 of the present embodiment is made of polyamide, it is not limited to polyamide, and may be made of any resin material, such as polyacetal, which is excellent in fuel permeation resistance, metal material, or the like.

As shown in FIGS. 4 and 5, the nozzle guide 10 has a body portion 20 and a connection member 50. As shown in FIGS. The body portion 20 and the connecting member 50 are formed separately from each other, and are engaged and fixed to each other as described later. In the present embodiment, the body portion 20 and the connection member 50 are each molded by injection molding, but they may be molded by any other molding method.

FIG. 6 is a front view showing a schematic configuration of the body portion 20. As shown in FIG. FIG. 7 is a side view showing a schematic configuration of the body portion 20. As shown in FIG. As shown in FIGS. 4 and 5 , main body 20 has a substantially cylindrical external shape and guides insertion and removal of fuel nozzle 150 . The body portion 20 has an insertion portion 22 forming a portion of the body portion 20 on the upstream side in the tank direction TD, and a flow path forming portion 26 forming a portion of the body portion 20 on the downstream side in the tank direction TD. .

As shown in FIG. 3 , the distal end portion 152 of the fuel nozzle 150 is inserted into the insertion portion 22 during fueling. In this embodiment, the insertion portion 22 means a region whose radial dimension is constant in the tank direction TD. As shown in FIGS. 2 to 7, a housing portion 23 is formed in a part of the insertion portion 22 in the circumferential direction. The accommodation portion 23 of the present embodiment is formed over the upstream end portion of the flow path forming portion 26 in addition to the insertion portion 22 . As shown in FIG. 3, the accommodating portion 23 accommodates an opening/closing member 134 that is opened during refueling. The accommodating portion 23 of the present embodiment is formed so as to be able to accommodate the entire opening/closing member 134 , but may be formed so as to be able to accommodate part of the opening/closing member 134 . The radial dimension of the accommodating portion 23 is larger than the radial dimension of the portion of the flow path forming portion 26 where the accommodating portion 23 is not formed.

As shown in FIGS. 2 to 7 , the flow path forming portion 26 is continuous with the insertion portion 22 in the tank direction TD, and is formed with a smaller diameter than the insertion portion 22 . The flow path forming portion 26 of the present embodiment is connected to a portion whose diameter gradually decreases toward the downstream side in the tank direction TD, and is connected to the downstream side of this portion, and the dimension in the radial direction is constant in the tank direction TD. It is composed of the part where As shown in FIG. 3 , the flow path forming portion 26 forms part of the fuel flow path 210 . The flow path forming portion 26 is positioned downstream in the tank direction TD from the position of the tip portion 152 of the fuel nozzle 150 that is inserted into the insertion portion 22 during fueling. Therefore, the tip portion 152 of the fuel nozzle 150 is not inserted into the flow path forming portion 26 .

As shown in FIGS. 5 to 7 , an engaging portion 28 is provided on the outer peripheral surface 27 of the flow path forming portion 26 . The engagement portion 28 is formed in the tank direction TD when viewed from the housing portion 23 . In other words, the forming position of the housing portion 23 and the forming position of the engaging portion 28 in the circumferential direction of the nozzle guide 10 are matched with each other.

The engaging portion 28 has a substantially rectangular parallelepiped external shape that protrudes radially outward. As shown in FIGS. 6 and 7, the engaging portion 28 is formed with two engaging protrusions 29 . Each engaging protrusion 29 is formed on the upstream side and the downstream side in the tank direction TD of the engaging portion 28, respectively. Each engaging protrusion 29 is formed at the radially outer end of the engaging portion 28 . Each engagement projection 29 engages with each engagement groove portion 59, which will be described later.

As shown in FIGS. 5 and 7 , the engaging portion 28 has a first channel wall 281 , a second channel wall 282 , a third channel wall 283 and a fourth channel wall 284 . The first flow path wall 281 is formed in contact with the outer peripheral surface 27 of the flow path forming portion 26 along the tank direction TD. The second channel wall 282 is formed in parallel with the first channel wall 281 at a predetermined distance in the radial direction. The third flow path wall 283 constitutes the ceiling portion of the engaging portion 28, and is connected to the upstream ends of the first flow path wall 281 and the second flow path wall 282 in the tank direction TD. It is formed along the radial direction. The fourth flow path wall 284 constitutes the bottom portion of the engaging portion 28, and is located at the center of the downstream end of the first flow path wall 281 and the second flow path wall 282 in the tank direction TD. They are connected to each other and formed in parallel with the third flow path wall 283 at a predetermined distance in the radial direction. By being surrounded by the first flow path wall 281, the second flow path wall 282, the third flow path wall 283, and the fourth flow path wall 284, the inside of the engaging portion 28 has space in the tank direction TD and in the radial direction. A communication hole 285 is formed along a direction perpendicular to each of the . The communication hole 285 functions as part of the vapor flow path 220 for the fuel vapor. That is, each channel wall 281 - 284 forms part of the steam channel 220 .

FIG. 8 is a front view showing a schematic configuration of the connecting member 50. As shown in FIG. 9 is a cross-sectional view showing a cross section taken along line IX-IX in FIG. 5. FIG. In addition, in FIG. 8, the steam flow path 220 is shown with the broken line for convenience of explanation.

The connecting member 50 has an external shape such that a tubular body is bent into a substantially U shape. The connection member 50 has a function of fixing the breather pipe 120 to the nozzle guide 10 and a function of discharging the fuel vapor in the tank direction TD. As shown in FIG. 3 , the upper end portion 51 of the connection member 50 in the tank direction TD is positioned downstream in the tank direction TD from the tip portion 152 of the fuel nozzle 150 inserted into the insertion portion 22 of the main body portion 20 . there is As shown in FIGS. 5 , 8 and 9 , the connection member 50 has a connection portion 52 , a steam flow path forming portion 55 , a discharge flow path forming portion 56 and an engaged portion 58 .

The connecting portion 52 has a substantially cylindrical external shape and extends along the tank direction TD. The connection portion 52 has a so-called fir-tree-shaped outer peripheral surface on which a plurality of projections projecting radially outward are formed. As shown in FIG. 2 , the connecting portion 52 is press-fitted into the upstream end 122 of the breather pipe 120 and connected to the breather pipe 120 .

8 and 9 communicates with the breather pipe 120 through the connecting portion 52 in a state where the connecting member 50 is engaged and fixed to the main body portion 20, and connects the breather pipe 120 and the connecting portion. 52 and form part of the vapor flow path 220 for the fuel vapor entering via . One end of the steam flow path forming portion 55 continues to the connecting portion 52 . A discharge channel forming portion 56 is provided at the other end of the steam channel forming portion 55 .

The discharge channel forming portion 56 is formed parallel to the connection portion 52 . In the present embodiment, the extending direction in which the discharge channel forming portion 56 is provided matches the tank direction TD. In other words, the angle formed by the extending direction and the tank direction TD is 0°. The angle formed by the extension direction and the tank direction TD of 0° means that it is about 0° when viewed macroscopically. An opening 57 for returning fuel vapor to the fuel flow path 210 in the filler pipe 110 is formed in the discharge flow path forming portion 56 . That is, the opening 57 is formed so as to open in the tank direction TD. As shown in FIG. 2 , in the present embodiment, the position of the opening 57 in the tank direction TD is aligned with the downstream end of the flow path forming portion 26 when the connection member 50 is engaged and fixed to the main body portion 20 . However, it may be located upstream or downstream of the downstream end of the flow path forming portion 26 in the tank direction TD.

The engaged portion 58 shown in FIG. 5 is configured to be engageable with the engaging portion 28 of the body portion 20 . The engaged portion 58 is formed by hollowing out a portion of the steam flow path forming portion 55 of the connection member 50 in a rectangular parallelepiped shape, and is a through hole penetrating the connection member 50 along the radial direction of the main body portion 20 . is formed as

As shown in FIGS. 5 and 8, two engaging grooves 59 are formed in the engaged portion 58 . Each engagement groove portion 59 is formed on the upstream side and downstream side of the engaged portion 58 in the tank direction TD. Each engagement groove portion 59 engages with each engagement protrusion 29 formed on the engagement portion 28 of the main body portion 20 .

As shown in FIG. 4, the connecting member 50 is configured such that the engaging portion 28 of the main body portion 20 is inserted into the engaged portion 58 and the engaging protrusion 29 is engaged with the engaging groove portion 59, whereby the main body portion 20 is and is fixed. The second flow path wall 282 of the engaging portion 28 constitutes the outer wall surface of the nozzle guide 10 when the connecting member 50 is engaged and fixed to the main body portion 20 . The third flow path wall 283 and the fourth flow path wall 284 of the connection member 50 overlap with the inner surface of the steam flow path forming portion 55 b when the connection member 50 is engaged and fixed to the main body portion 20 .

FIG. 10 is a partial cross-sectional view explaining the configuration of the steam flow path 220. As shown in FIG. FIG. 10 shows a cross section of the nozzle guide 10 taken along line XX shown in FIG. 4 in a perspective view similar to that of FIG. The fuel vapor flows through the interior of the vapor flow path forming portion 55 through communication holes 285 formed by being surrounded by flow path walls 281 to 284, as indicated by thick arrows in FIG. Note that the second flow path wall 282 does not appear in the cross section shown in FIG. Thus, part of the steam flow path 220 of this embodiment is formed by the steam flow path forming portion 55 and the engaging portion 28 .

Fuel vapor in the fuel tank FT flows through the breather pipe 120 from the downstream side to the upstream side in the tank direction TD. Such fuel vapor reaches the connecting portion 52 from the breather pipe 120 shown in FIG. , into the fuel flow path 210 in the filler pipe 110 shown in FIG. In this embodiment, since the extending direction of the discharge passage forming portion 56 coincides with the tank direction TD, the flow direction of the fuel vapor discharged from the discharge passage forming portion 56 is substantially parallel to the tank direction TD. Become. Therefore, the fuel vapor discharged from the opening 57 flows in the tank direction TD along with the flow of fuel discharged from the fuel nozzle 150 during refueling. In this manner, the fuel vapor can be circulated back to the fuel tank FT, and the fuel vapor can be prevented from flowing out from the filler opening FC.

The breather pipe 120 is assembled to the nozzle guide 10 by pressing the connecting portion 52 of the connecting member 50 into the upstream end 122 of the breather pipe 120 and then engaging the engaging portion 28 of the main body portion 20 with the engaged portion of the connecting member 50 . 58 may be engaged and fixed.

According to the nozzle guide 10 of the first embodiment described above, the engaged portion 58 formed in the connection member 50 connected to the breather pipe 120 is attached to the outer peripheral surface 27 of the flow path forming portion 26 of the body portion 20. The connecting member 50 is engaged and fixed to the body portion 20 by engaging with the formed engaging portion 28 . In this way, since the connection member 50 can be provided on the outer surface of the main body 20 of the nozzle guide 10 by engagement and fixation, the connection member 50 can be mounted after the connection portion 52 of the connection member 50 is press-fitted into the upstream end 122 of the breather pipe 120 . 50 can be integrated with body portion 20 . Therefore, in the so-called inner breather specification fuel supply device 100 in which the breather pipe 120 is arranged inside the filler pipe 110, the ease of assemblage of the breather pipe 120 can be improved.

In addition, since the connection member 50 can be engaged and fixed to the body portion 20, the connection member 50 and the body portion 20 can be formed separately by injection molding or the like. For this reason, compared to a configuration in which the connection member 50 and the main body portion 20 are integrally molded by injection molding, complication of the mold release process can be suppressed, and the discharge flow path forming portion 56 can be formed along the tank direction TD. It is possible to realize a structure formed by omitting the undercut processing. Therefore, it is possible to suppress an increase in cost required for manufacturing the nozzle guide 10 .

Further, since the engaging projection 29 is formed on the engaging portion 28 and the engaging groove portion 59 is formed on the engaged portion 58, the engaging portion 28 and the engaged portion 58 can be easily engaged. , and the ease of assemblage of the breather pipe 120 can be further improved. Moreover, for example, compared with the structure which fixes the connection member 50 to the main-body part 20 by welding etc., it can suppress that the manufacturing process of the nozzle guide 10 becomes complicated.

Further, the engaging portion 28 formed in the main body portion 20 constitutes flow channel walls 281 to 284 forming a part of the steam flow channel 220, and the second flow channel wall 282 is outside the nozzle guide 10. make up the wall. Therefore, the function of fixing the connection member 50 to the main body part 20 and the function of forming a part of the steam flow path 220 can be combined by the engaging part 28 . Therefore, the connecting member 50 can be fixed to the outer surface of the main body 20 while saving space. In addition, since part of the channel wall for forming the steam channel 220 in the steam channel forming portion 55 of the connecting member 50 can be omitted, the size of the connecting member 50 can be suppressed. Reduce costs.

Further, the upper end portion 51 of the connecting member 50 in the tank direction TD is positioned downstream in the tank direction TD from the position of the tip portion 152 of the fuel nozzle 150 inserted into the nozzle guide 10 during fueling. Therefore, when tip portion 152 of fuel nozzle 150 collides with the inner peripheral surface of nozzle guide 10 , deformation and damage of connecting member 50 can be suppressed. Therefore, it is possible to prevent the function of fixing the breather pipe 120 to the nozzle guide 10 from being impaired.

Further, since the connecting member 50 is fixed to the engaging portion 28 provided on the outer surface of the main body portion 20 of the nozzle guide 10, the flow of the fuel discharged from the fuel nozzle 150 is not hindered by the connecting member 50. Also, it is possible to prevent the connection member 50 from interfering with the function of inserting and removing the fuel nozzle 150 . Further, since the engaging portion 28 is provided on the outer peripheral surface 27 of the flow path forming portion 26 of the main body portion 20, the upper end portion 51 of the connecting member 50 is located downstream of the tip portion 152 of the fuel nozzle 150 in the tank direction TD. A configuration located on the side can be easily realized. In addition, since the engaging portion 28 is provided on the outer peripheral surface 27 of the flow path forming portion 26 formed with a smaller diameter than the insertion portion 22, the nozzle guide 10 diameter is It is possible to suppress an increase in the dimension in the direction.

Also, the engaging portion 28 is formed in the tank direction TD when viewed from the accommodating portion 23 . That is, on the downstream side of the accommodation portion 23 having a radial dimension larger than that of the other portion of the insertion portion 22, the outer peripheral surface 27 of the flow path forming portion 26 formed with a diameter smaller than that of the insertion portion 22 is applied. A joint 28 is formed. Therefore, since the connection member 50 can be arranged radially inward of the accommodating portion 23 , it is possible to suppress an increase in the radial dimension of the nozzle guide 10 due to the arrangement of the connection member 50 . In other words, the connection member 50 can be arranged by utilizing the dead space, so that space can be saved.

Further, since the angle formed by the extending direction in which the discharge passage forming portion 56 is provided and the tank direction TD is 0°, the fuel vapor can be rectified in the tank direction TD and discharged from the opening 57 . Therefore, the fuel vapor can be circulated back to the fuel tank FT, and the fuel vapor can be prevented from flowing out from the filler opening FC.

B. Second embodiment:
FIG. 11 is a partial cross-sectional view showing the configuration of the main part of the nozzle guide of the second embodiment. FIG. 11 shows a cross-section similar to that shown in FIG. The nozzle guide of the second embodiment differs from the nozzle guide 10 of the first embodiment in that the connecting member 50 and the engaging portion 28 are replaced with the connecting member 50a and the engaging portion 28a. Since other configurations are the same as the nozzle guide 10 of the first embodiment, the same configurations are denoted by the same reference numerals, and detailed description thereof will be omitted.

Two guide portions 54a are formed in the connection member 50a. The two guide portions 54a are formed as sloping portions that fill the corners on the upstream side in the tank direction TD in the steam flow path 220 formed in the steam flow path forming portion 55a. Each guide portion 54a guides the flow of the fuel vapor, suppresses turbulence that may occur at the corners of the vapor passage 220, suppresses pressure loss, and promotes circulation of the fuel vapor.

Two guide portions 24a are formed in the engaging portion 28a. The two guide portions 24a are formed as sloping portions in which corner portions on the upstream side in the tank direction TD are shaved in the fourth flow path wall 284a. Each of the guide portions 24a guides the flow of the fuel vapor, suppresses turbulence that may occur at the corners of the vapor passage 220, suppresses pressure loss, and promotes circulation of the fuel vapor.

The nozzle guide of the second embodiment described above has the same effects as the nozzle guide 10 of the first embodiment. In addition, since the connecting member 50a and the fourth flow path wall 284a of the engaging portion 28a are formed with the guide portions 54a, 24a for guiding the flow of the fuel vapor, the pressure loss is suppressed and the flow of the fuel vapor is suppressed. The flow can be made smoother, and the circulation of fuel vapor can be promoted more.

C. Third embodiment:
FIG. 12 is a perspective view showing a schematic configuration of the nozzle guide 10b of the third embodiment. 13 is a cross-sectional view showing a cross section taken along line XIII-XIII of FIG. 12. FIG. FIG. 14 is an exploded perspective view showing an exploded nozzle guide 10b of the third embodiment. The nozzle guide 10b of the third embodiment differs from the nozzle guide 10 of the first embodiment in that it includes a body portion 20b and a connection member 50b instead of the body portion 20 and the connection member 50. FIG. Since other configurations are the same as the nozzle guide 10 of the first embodiment, the same configurations are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 15 is a front view showing a schematic configuration of the body portion 20b. FIG. 16 is a side view showing a schematic configuration of the body portion 20b. The body portion 20b has an engaging portion 28b instead of the engaging portion 28. As shown in FIG. As shown in FIGS. 13 to 16, the engagement portion 28b includes a first wall portion 286b, a third flow path wall 283b, a support portion 287b, a first engagement projection 291b, and a second engagement projection 292b. and

The first wall portion 286b is formed at the position where the first flow path wall 281 was formed in the engaging portion 28 of the first embodiment, and is in contact with the outer peripheral surface 27 of the flow path forming portion 26 and extends in the tank direction TD. formed along the The third flow path wall 283b has a substantially flat plate-like external shape, and constitutes the ceiling portion of the engaging portion 28b. The third flow path wall 283b is continuous with the upstream end of the first wall portion 286b in the tank direction TD, and is formed along the radial direction. The support portion 287b has a substantially rod-like external shape, and is formed at a position where the fourth flow path wall 284 was formed in the engaging portion 28 of the first embodiment. The support portion 287b is continuous with the downstream end portion of the first wall portion 286b and formed along the radial direction. The support portion 287b supports the connection member 50b.

The first engaging projection 291b is formed to project toward the downstream side in the tank direction TD at the radially outer end portion of the third flow path wall 283b. The first engaging protrusion 291b engages with a first engaged portion 581b, which will be described later. The second engagement projection 292b is formed at the radially outer end of the support portion 287b so as to protrude toward the upstream side in the tank direction TD. The second engaging protrusion 292b engages with a second engaged portion 582b, which will be described later.

FIG. 17 is a front view showing a schematic configuration of the connection member 50b. 18 is a cross-sectional view showing a cross section taken along line XVIII-XVIII in FIG. 14. FIG. In addition, in FIG. 17, the steam flow path 220 is shown by the broken line for convenience of explanation.

As shown in FIGS. 14, 17 and 18, the connection member 50b includes a connection portion 52, a steam flow channel forming portion 55b, a discharge flow channel forming portion 56, a first engaged portion 581b, and a second and an engaged portion 582b.

The steam passage forming portion 55b communicates with the breather pipe 120 via the connecting portion 52 and flows in via the breather pipe 120 and the connecting portion 52 in a state where the connecting member 50b is engaged and fixed to the main body portion 20b. It forms part of the vapor flow path 220 for the fuel vapor. The steam flow path forming portion 55b has a hollow, substantially rectangular parallelepiped external shape with a ceiling portion omitted, and includes a fifth flow path wall 551b, a sixth flow path wall 552b, a seventh flow path wall 553b, and a third flow path wall 553b. It has eight channel walls 554b and a ninth channel wall 555b.

The fifth channel wall 551b shown in FIGS. 13 and 14 is formed along the tank direction TD, and is in contact with the first wall portion 286b when the connection member 50b is engaged and fixed to the main body portion 20b. The sixth channel wall 552b shown in FIGS. 13, 14 and 17 is formed in parallel with the fifth channel wall 551b at a predetermined distance in the radial direction. The seventh flow path wall 553b shown in FIGS. 13, 17 and 18 constitutes the bottom portion of the steam flow path forming portion 55b, and the fifth flow path wall 551b and the sixth flow path wall 552b, and formed along the radial direction. As shown in FIGS. 17 and 18, a first through-hole 556b and a second through-hole 557b are formed side by side in the seventh flow path wall 553b in the tank direction TD. The connecting portion 52 is connected to the seventh channel wall 553b via the first through hole 556b, and the discharge channel forming portion 56 is connected to the seventh channel wall 553b via the second through hole 557b. The eighth flow path wall 554b and the ninth flow path wall 555b respectively configure side portions of the steam flow path forming portion 55b, and are formed parallel to each other with a predetermined distance therebetween. The eighth channel wall 554b and the ninth channel wall 555b are connected to the fifth channel wall 551b, the sixth channel wall 552b, and the seventh channel wall 553b, respectively, and are formed along the tank direction TD. there is

The first engaged portion 581b shown in FIGS. 13, 17 and 18 is formed at the upstream end of the connecting member 50b. In the first engaged portion 581b, the upstream ends of the fifth channel wall 551b and the sixth channel wall 552b are arranged so that the upstream ends of the eighth channel wall 554b and the ninth channel wall 555b are connected to each other. TD in the tank direction TD. With such a configuration, the first engaged portion 581b engages with the first engaging protrusion 291b formed on the engaging portion 28b of the main body portion 20b.

The second engaged portion 582b shown in FIGS. 17 and 18 is formed in the central portion of the bottom portion of the steam channel forming portion 55b in the connecting member 50b, and is sandwiched between the connecting portion 52 and the discharge channel forming portion 56. configured as follows. In the second engaged portion 582b, the support portion 287b of the engaging portion 28b is inserted between the connecting portion 52 and the discharge flow path forming portion 56, so that the second engaging projection 292b is formed on the sixth flow path wall. 552b and engages with the second engaging projection 292b.

FIG. 19 is a partial cross-sectional view illustrating the configuration of the steam flow path 220 of the third embodiment. FIG. 19 shows a cross section of the nozzle guide 10b cut along the line XIX-XIX shown in FIG. 12 in a perspective view similar to that of FIG. 19, the fuel vapor flows from the connecting portion 52 through the first through hole 556b into the vapor flow path forming portion 55b, and flows through the fifth flow path wall 551b to the third flow path wall 551b of the connecting member 50b. It flows through the space surrounded by the 9 channel wall 555b and the third channel wall 283b of the engaging portion 28b. After that, it flows to the discharge channel forming portion 56 via the second through hole 557b and is discharged from the opening 57 to the fuel channel 210 (not shown). Note that the sixth flow path wall 552b of the connection member 50b is not shown in the cross section shown in FIG. Thus, part of the steam flow path 220 of this embodiment is formed by a part of the engaging portion 28b and the steam flow path forming portion 55b.

The nozzle guide 10b of the third embodiment described above has the same effects as the nozzle guide 10 of the first embodiment. In addition, it is possible to suppress complication of the configurations of the engaging portion 28b and the connecting member 50b.

D. Fourth embodiment:
FIG. 20 is a perspective view showing a schematic configuration of the nozzle guide 10c of the fourth embodiment. 21 is a cross-sectional view showing a cross section taken along line XXI-XXI of FIG. 20. FIG. FIG. 22 is an exploded perspective view showing an exploded nozzle guide 10c of the fourth embodiment. The nozzle guide 10c of the fourth embodiment differs from the nozzle guide 10b of the third embodiment in that it includes a body portion 20c and a connection member 50c instead of the body portion 20b and the connection member 50b. More specifically, instead of the third channel wall 283b of the engaging portion 28b, a part of the outer peripheral surface 27 of the channel forming portion 26c constitutes the tenth channel wall 271c, and the outer surface of the accommodating portion 23c is different from the nozzle guide 10b of the third embodiment in that a part of the 11th flow path wall 231c is formed. Since other configurations are the same as those of the nozzle guide 10b of the third embodiment, the same configurations are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 23 is a front view showing a schematic configuration of the body portion 20c. FIG. 24 is a side view showing a schematic configuration of the body portion 20c. As shown in FIGS. 20 to 24, the engaging portion 28c provided in the main body portion 20c of the fourth embodiment is formed slightly upstream in the tank direction TD compared to the engaging portion 28b of the third embodiment. It is In addition, the dimension of the first flow path wall 281c along the tank direction TD is shorter than that of the first wall portion 286b of the third embodiment, and constitutes the flow path wall. A third engaging projection 293c is formed on the outer surface of the accommodating portion 23c instead of the first engaging projection 291b.

The first flow path wall 281c is formed along the tank direction TD on the outer peripheral surface 27 of the flow path forming portion 26c. As shown in FIGS. 21 and 24, in the outer peripheral surface 27 of the flow path forming portion 26c, the portion upstream in the tank direction TD of the first flow path wall 281c at the same circumferential position as the first flow path wall 281c is , constitute the tenth channel wall 271c. The tenth flow path wall 271c forms part of the vapor flow path 220 for the fuel vapor when the connection member 50c is engaged and fixed to the main body 20c.

The third engagement projection 293c shown in FIGS. 21, 23 and 24 is located at the radially outer and downstream end in the tank direction TD of the outer surface of the housing portion 23c formed in the main body portion 20c. It is formed to protrude toward the downstream side in the direction TD. The third engaging projection 293c engages with a third engaged portion 583c of the connecting member 50c, which will be described later. As shown in FIGS. 21 and 24, on the outer surface of the accommodating portion 23c, the portion on the downstream side in the tank direction TD constitutes an eleventh channel wall 231c. The eleventh flow path wall 231c forms the ceiling portion of the vapor flow path 220 for the fuel vapor when the connection member 50c is engaged and fixed to the main body 20c. In this embodiment, as shown in FIG. 23, the eleventh flow path wall 231c is formed in a curved surface that protrudes toward the downstream side in the tank direction TD.

FIG. 25 is a front view showing a schematic configuration of the connecting member 50c. 26 is a cross-sectional view showing a cross section taken along line XXVI--XXVI of FIG. 22. FIG. In addition, in FIG. 25, the steam flow path 220 is shown by the broken line for convenience of explanation.

A steam flow path forming portion 55c included in a connecting member 50c of the fourth embodiment is different from the steam flow path forming portion 55b of the third embodiment in that a portion corresponding to the fifth flow path wall 551b is omitted. 22 and 25, the end portion of the sixth flow path wall 552c on the upstream side in the tank direction TD is formed into a curved surface that is concave toward the downstream side in the tank direction TD. Also, the shapes of the eighth channel wall 554c and the ninth channel wall 555c shown in FIG. there is

Of the sixth flow path wall 552c shown in FIGS. 22 and 25, the central portion of the end portion on the upstream side in the tank direction TD functions as a third engaged portion 583c. The third engaged portion 583c engages with the third engaging projection 293c.

FIG. 27 is a partial cross-sectional view illustrating the configuration of the steam flow path 220 of the fourth embodiment. FIG. 27 shows a cross section of the nozzle guide 10c taken along line XXII-XXII shown in FIG. 20 in a perspective view similar to FIG. As indicated by the thick arrows in FIG. 27, the fuel vapor passes through the sixth flow path wall 552c, the seventh flow path wall 553b, the eighth flow path wall 554c, the ninth flow path wall 555c of the connection member 50c, and the main body portion. It flows through the space surrounded by the first channel wall 281c, the tenth channel wall 271c, and the eleventh channel wall 231c of 20c. Note that the sixth flow path wall 552c of the steam flow path forming portion 55c is not shown in the cross section shown in FIG. Thus, part of the steam flow path 220 of this embodiment is formed by a part of the main body part 20c and the steam flow path forming part 55c. Note that the engaging portion 28c of the fourth embodiment does not form a part of the steam flow path 220. As shown in FIG.

The nozzle guide 10c of the fourth embodiment described above has the same effects as the nozzle guide 10b of the third embodiment. In addition, since a part of the steam flow path 220 is formed by the tenth flow path wall 271c, which is a part of the outer peripheral surface 27 of the flow path forming portion 26c, the function of forming a part of the fuel flow path 210 is also achieved. The function of forming part of the steam flow path 220 can also be shared by the flow path forming portion 26c. A part of the steam flow path 220 is formed by the first flow path wall 281c and the tenth flow path wall 271c that are part of the outer peripheral surface 27 of the flow path forming portion 26c formed to have a smaller diameter than the insertion portion 22. is formed, the steam flow path 220 can be formed by fixing the connection member 50c to the outer surface of the main body portion 20c while saving space. In addition, since a part of the steam channel 220 is formed by the eleventh channel wall 231c, which is a part of the outer surface of the housing portion 23c, two members, the steam channel forming portion 55c and the main body portion 20c, are formed. overlap each other can be further reduced. Therefore, the steam flow path 220 can be formed by fixing the connection member 50c to the outer surface of the main body portion 20c while further saving space.

E. Other embodiments:
(1) The configurations of the engaging portions 28, 28a to 28c in each of the above-described embodiments are merely examples, and various modifications are possible. For example, the engaging portions 28, 28a to 28c may not be formed in the direction of the tank when viewed from the accommodating portions 23, 23c. That is, the engaging portions 28, 28a to 28c may be formed at positions shifted from the accommodating portions 23, 23c in the circumferential direction. Further, for example, the engaging portions 28, 28a to 28c may be provided on the outer peripheral surface of the insertion portion 22. As shown in FIG. Further, for example, the engaging portions 28, 28a to 28c may be formed so that the upper end portion 51 of the connecting members 50, 50a to 50c is upstream of the tip portion 152 of the fuel nozzle 150 in the tank direction TD. good. Further, for example, the engaging portions 28, 28a to 28c are formed in arbitrary shapes that can be engaged with the engaged portion 58, the first engaged portions 581b, 582b, and the third engaged portion 583c. Alternatively, for example, engaging grooves may be formed in the engaging portions 28, 28a to 28c, and engaging protrusions may be formed in the connecting members 50, 50a to 50c. Even with such a configuration, the same effects as those of the above-described embodiments can be obtained.

(2) In each of the above-described embodiments, the angle formed by the extending direction of the discharge passage forming portions 56 of the connecting members 50, 50a to 50c and the tank direction TD was 0°, but 0° or more and less than 90°. may be in the range of For example, the connecting portion 52 and the discharge passage forming portion 56 may extend in directions away from each other toward the tank direction TD. If the angle formed by the extending direction of the discharge flow path forming portion 56 and the tank direction TD is less than 90°, the fuel vapor discharged from the opening 57 will flow out of the fuel nozzle 150 during refueling. and flowed in the tank direction TD. Therefore, since the fuel vapor can be rectified in the tank direction TD and discharged from the opening 57, the fuel vapor can be circulated back to the fuel tank FT, thereby suppressing the fuel vapor from flowing out from the filler port FC. can. Further, the angle formed by the extending direction of the discharge passage forming portion 56 and the tank direction TD may be 90° or more. Also in this aspect, the upstream end 122 of the breather pipe 120 can be fixed to the nozzle guides 10, 10b-c, so that the fixing structure of the breather pipe 120 can be simplified and the ease of assembly of the breather pipe 120 can be improved.

(3) In the second embodiment, the connecting member 50a and the second flow path wall 282a of the engaging portion 28a are formed with the guide portions 54a, 24a for guiding the flow of the fuel vapor. One of 54a, 24a may be omitted, and any guide portion capable of guiding and rectifying the flow of fuel vapor is formed in place of or in addition to guide portions 54a, 24a. may have been For example, in each channel wall of each of the above-described embodiments, an arbitrary guide portion capable of guiding and straightening the flow of fuel vapor may be formed. That is, the position, number, shape, etc. of the guide portions may be changed arbitrarily. Such a configuration can also suppress the generation of turbulent flow of fuel vapor, and has the same effect as the second embodiment.

(4) The configurations of the nozzle guides 10, 10b-c and the fuel supply device 100 in each of the above-described embodiments are merely examples, and various modifications are possible. For example, a part of the main body 20, 20b-c may not form a channel wall that forms part of the steam channel 220. FIG. In this aspect, a part of the steam flow path 220 may be formed only by the steam flow path forming portions 55, 55a-b of the connection members 50, 50a-c. Further, for example, the accommodating portions 23, 23c of the nozzle guides 10, 10b-c may be omitted. Further, for example, the connection portions 52 of the connection members 50, 50a to 50c may be connected to the breather pipe 120 by any connection method, not limited to press fitting into the upstream end 122 of the breather pipe 120. Also, for example, the fuel supply device 100 may include a fuel cap instead of the opening forming member 130 .

The present invention is not limited to the embodiments described above, and can be implemented in various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments corresponding to the technical features in the respective modes described in the Summary of the Invention column may be used to solve some or all of the above problems, or Substitutions and combinations may be made as appropriate to achieve part or all. Also, if the technical features are not described as essential in this specification, they can be deleted as appropriate.

10, 10b-c... Nozzle guide 20, 20b-c... Main body part 21b... Fitting concave part 22... Insertion part 23, 23c... Accommodating part 24a... Guide part 26, 26c... Flow path forming part 27... Peripheral surface 28, 28a-c... Engagement portion 29... Engagement projection 50, 50a-c... Connection member 51... Upper end portion 52... Connection portion 54a... Guide portion 55, 55a-c Vapor flow path forming portion 56 Discharge flow path forming portion 57 Opening 58 Engaged portion 59 Engaging groove 100 Fuel supply device 110 Filler pipe 112 Upstream end 114 Downstream end 116 Check valve 120 Breather pipe 122 Upstream end 124 Downstream end 125 Opening 126 On-off valve 130 Opening member 131 Supply port 132 Lid member DESCRIPTION OF SYMBOLS 134... Opening-and-closing member 136... Pipe connection part 137... Protrusion 150... Refueling nozzle 152... Tip part 210... Fuel flow path 220... Steam flow path 231c... Eleventh flow path wall 271c... Tenth flow Path walls 281, 281c... First channel wall 282... Second channel wall 283, 283b... Third channel wall 284, 284a... Fourth channel wall 285... Communication hole 286b... First Wall portion 287b Supporting portion 291b First engaging projection 292b Second engaging projection 293c Third engaging projection 551b Fifth channel wall 552b-c Sixth channel wall 553b... seventh channel wall 554b-c... eighth channel wall 555b-c... ninth channel wall 556b... first through hole 557b... second through hole 581b... first engaged portion , 582b... second engaged portion, 583c... third engaged portion, FC... fuel filler port, FT... fuel tank, TD... tank direction

Claims (10)

In a fuel supply device, a nozzle guide disposed inside a filler pipe that forms a fuel flow path for fuel supplied from a fuel nozzle,
a main body having an engaging portion on its outer surface and guiding the insertion and removal of the fuel nozzle;
a connecting member disposed inside the filler pipe and connected to a breather pipe for discharging fuel vapor in the fuel tank, the connecting member forming at least part of a vapor flow path for the fuel vapor;
with
The connecting member has an engaged portion that engages with the engaging portion, and is engaged and fixed to the main body portion at the engaged portion ,
A part of the main body constitutes a channel wall that forms a part of the steam channel,
nozzle guide. A nozzle guide according to claim 1 ,
The channel wall is configured by a part of the engaging portion,
nozzle guide. The nozzle guide according to claim 1 or claim 2 ,
The main body is
an insertion portion having an accommodation portion capable of accommodating at least a portion of an opening/closing member that opens and closes the fuel flow path, and into which a tip portion of the fuel supply nozzle is inserted;
a flow passage forming portion that is continuous with the insertion portion in a tank direction from the fuel filler opening to the fuel tank and that is formed with a smaller diameter than the insertion portion to form a part of the fuel flow passage;
has
The flow channel wall is configured by a part of the outer peripheral surface of the flow channel forming portion,
nozzle guide. A nozzle guide according to any one of claims 1 to 3 ,
A guide portion that guides the flow of the fuel vapor is formed on the flow channel wall,
nozzle guide. A nozzle guide according to any one of claims 1 to 4 ,
The main body is
an insertion portion having an accommodation portion capable of accommodating at least a portion of an opening/closing member that opens and closes the fuel flow path, and into which a tip portion of the fuel supply nozzle is inserted;
a flow passage forming portion that is continuous with the insertion portion in a tank direction from the fuel filler opening to the fuel tank and that is formed with a smaller diameter than the insertion portion to form a part of the fuel flow passage;
has
The engaging portion is formed in the direction of the tank when viewed from the accommodating portion,
nozzle guide. A nozzle guide according to any one of claims 1 to 5 ,
The upper end of the connecting member is located downstream of the tip of the fuel nozzle inserted into the main body during fueling in the tank direction from the fuel filler opening to the fuel tank,
nozzle guide. A nozzle guide according to any one of claims 1 to 6 ,
One end of the connection member is connected to the breather pipe, and the other end is provided with a discharge passage forming portion having an opening for returning the fuel vapor to the filler pipe,
The angle formed by the extension direction in which the discharge passage forming portion is provided and the tank direction from the filler port to the fuel tank is 0° or more and less than 90°.
nozzle guide. A nozzle guide according to claim 7 ,
the angle is 0°;
nozzle guide. A nozzle guide according to any one of claims 1 to 8 ,
The connection member has a guide portion that guides the flow of the fuel vapor,
nozzle guide. A nozzle guide according to any one of claims 1 to 9 ,
An engaging protrusion is formed in the engaging portion,
An engaging groove portion that engages with the engaging protrusion is formed in the engaged portion,
nozzle guide.

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