JP2021008212A - Nozzle guide - Google Patents

Abstract

To improve assemblability of a breather pipe housed in a filler pipe.SOLUTION: A nozzle guide (10, 10a to b) disposed in a filler pipe (110) includes: a body part (20, 20b) which guides insertion and removal of an oil supply nozzle (150); and a connection member (50, 50a to c) provided on an outer peripheral surface (27) of the body part (20, 20b) and having an upper end part (51) located at the downstream side of a tip part (152) of the oil supply nozzle (150) in a tank direction (TD) from an oil supply port (FC) to a fuel tank (FT). The connection member (50, 50a to c) has: a connection part (52, 52a) connected to a breather pipe (120) disposed in the filler pipe (110); and a vapor passage formation part (55, 55b to c) which forms a part of a vapor passage (220) of fuel vapor flowing thereinto through the breather pipe (120) and the connection part (52, 52a).SELECTED DRAWING: Figure 2

Description

The present invention relates to a nozzle guide that guides the insertion and removal of a refueling 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 fuel filler port and a fuel tank and a breather pipe for discharging fuel vapor in the fuel tank have been used. A fuel supply device is used. In the fuel supply device described in Patent Document 1, the breather pipe is arranged inside the filler pipe to save space and reduce costs.

Jikkai Sho 61-53220

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

The present invention can be realized as the following forms.

(1) According to one embodiment of the present 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 the refueling nozzle in the fuel supply device, and includes a main body that guides the insertion and removal of the refueling nozzle. A connecting member provided on the outer peripheral surface of the main body and whose upper end is located downstream of the tip of the refueling nozzle inserted into the main body in the tank direction from the fuel filler port to the fuel tank. The connecting member is arranged inside the filler pipe and is connected to a breather pipe that discharges fuel vapor in the fuel tank, and communicates with the breather pipe via the connecting portion. It also has a steam flow path forming portion that forms a part of the steam flow path of the fuel steam that flows in through the breather pipe and the connecting portion. According to the nozzle guide of this form, since the connecting member having the connecting portion connected to the breather pipe is provided on the outer peripheral surface of the main body portion, the breather pipe can be fixed to the nozzle guide. Therefore, in the so-called inner breather specification fuel supply device in which the breather pipe is arranged inside the filler pipe, the fixing structure of the breather pipe can be simplified and the assembling property of the breather pipe can be improved. Further, since the connecting member has a steam flow path forming portion that forms a part of the steam flow path of the fuel vapor, the flow of the fuel vapor discharged from the breather pipe can be rectified. Therefore, it is possible to suppress the fuel to be refueled from foaming due to the fuel vapor, and it is possible to suppress the deterioration of the refueling property. Further, since the upper end of the connecting member in the tank direction is located on the downstream side of the tip of the refueling nozzle inserted into the main body, when the tip of the refueling nozzle hits the inner peripheral surface of the nozzle guide, Deformation and damage of the connecting member can be suppressed. Therefore, it is possible to prevent the function of fixing the breather pipe to the nozzle guide from being impaired.
(2) In the nozzle guide of the above embodiment, the main body portion is formed by connecting the insertion portion into which the tip portion is inserted and the insertion portion in the tank direction and having a diameter smaller than that of the insertion portion. It has a flow path forming portion forming a part of the road, and the connecting member may be provided on the outer peripheral surface of the flow path forming portion. According to the nozzle guide of this form, since the connecting member is provided on the outer peripheral surface of the flow path forming portion formed with a diameter smaller than that of the insertion portion, the radial dimension of the nozzle guide is provided in order to provide the connecting member. It is possible to suppress the increase in size, and it is possible to easily realize a configuration in which the upper end portion of the connecting member is located downstream of the tip end portion of the refueling nozzle in the tank direction.
(3) In the nozzle guide of the above embodiment, an accommodating portion capable of accommodating at least a part of an opening / closing member that opens / closes the fuel flow path is formed in a part of the insertion portion in the circumferential direction, and the connecting member. May be formed in the direction of the tank when viewed from the housing portion. According to the nozzle guide of this form, since the connecting member is formed in the tank direction when viewed from the accommodating portion, the connecting member can be arranged by utilizing the dead space, and the space can be saved.
(4) In the nozzle guide of the above embodiment, one end of the steam flow path forming portion is connected to the connecting portion, and the other end is a discharge flow path forming portion in which an opening for returning the fuel vapor is formed in the filler pipe. The angle formed by the extension direction in which the discharge flow path forming portion is provided and the tank direction may be 0 ° or more and less than 90 °. According to the nozzle guide of this form, the angle formed by the extension direction of the discharge flow path forming portion and the tank direction is 0 ° or more and less than 90 °, so that the fuel vapor is rectified toward the tank direction and discharged from the opening. it can. Therefore, the fuel vapor can be returned to the fuel tank and circulated, and the fuel vapor can be suppressed from flowing out from the fuel filler port.
(5) In the nozzle guide of the above form, the angle may be 0 °. According to the nozzle guide of this form, since the angle formed by the extension direction of the discharge flow path forming portion and the tank direction is 0 °, the fuel vapor can be more rectified toward the tank direction and discharged from the opening, and the fuel can be discharged. It is possible to further suppress the outflow of steam from the fuel filler port.
(6) In the nozzle guide of the above embodiment, the main body portion has an engaging portion on the outer peripheral surface, and the connecting member has an engaged portion that engages with the engaging portion, and the main body portion and the main body portion. It may be engaged and fixed. According to the nozzle guide of this form, the main body and the connecting member are engaged and fixed to each other by engaging the engaging portion formed on the outer peripheral surface of the main body and the engaged portion of the connecting member with each other. Therefore, after connecting the breather pipe to the connecting member, the connecting member can be integrated with the main body. Therefore, the assembling property of the breather pipe can be further improved.

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

It is a schematic diagram which shows the schematic structure of the fuel supply device. It is a front view which shows the structure of the opening forming member and the nozzle guide. It is sectional drawing which shows the cross section along the line III-III of FIG. It is a perspective view which shows the schematic structure of the nozzle guide. It is a partial cross-sectional view explaining the structure of the steam flow path forming part. It is a front view which shows the schematic structure of the nozzle guide of 2nd Embodiment. It is a perspective view which shows the schematic structure of the nozzle guide of 3rd Embodiment. It is an exploded perspective view which shows the nozzle guide of 3rd Embodiment by disassembling. It is a front view which shows the schematic structure of the main body part. It is a side view which shows the schematic structure of the main body part. It is a front view which shows the schematic structure of the connection member. It is sectional drawing which shows the cross section along the XII-XII line of FIG. It is a partial cross-sectional view explaining the structure of a steam flow path. It is sectional drawing which shows the structure of the connection member of 4th Embodiment.

A. First Embodiment:
FIG. 1 is a schematic view showing a schematic configuration of a fuel supply device 100 to which a nozzle guide 10 as an embodiment of the present invention is applied. The fuel supply device 100 supplies the fuel discharged from the refueling nozzle 150 mounted on the vehicle and inserted into the refueling port FC to the fuel tank FT. In the following description, the side of the filler pipe 110 where the fuel filler port FC is provided is also referred to as an upstream side, and the side where the fuel tank FT is provided is also referred to as a downstream side. Further, macroscopically, the direction from the fuel filler port FC to the fuel tank FT, that is, the direction from the upstream side to the downstream side is also referred to as "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 cross-sectional view, and other configurations are shown in an external view. The refueling nozzle 150 is indicated by a chain double-dashed line.

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

The breather pipe 120 is arranged inside the filler pipe 110. The breather pipe 120 forms a steam flow path (hereinafter, also simply referred to as “steam flow path 220”) for discharging fuel vapor inside the 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. The upstream end 122 of the breather pipe 120 is connected to the nozzle guide 10 as described later. The downstream end 124 of the breather pipe 120 is exposed inside the fuel tank FT. An opening 125 is formed at the downstream end 124. The opening 125 is formed at a height corresponding to the full tank liquid level of the fuel tank FT. Further, an on-off valve 126 is provided at the downstream end 124. When the liquid level of the fuel stored in the fuel tank FT drops below 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. Further, the on-off valve 126 is closed by buoyancy when the liquid level of the fuel stored in the fuel tank FT rises, and suppresses the fuel from being mixed into the breather pipe 120 at the time of refueling. FIG. 1 shows an on-off valve 126 in a closed state.

FIG. 2 is a front view showing the configurations of the opening forming member 130 and the nozzle guide 10. FIG. 2 corresponds to the arrow A view of 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 shown by alternate long and short dash lines, respectively. FIG. 3 is a cross-sectional view showing a cross section taken along the line III-III of FIG. In FIG. 3, for convenience of illustration, the position of the refueling nozzle 150 at the time of refueling is indicated by a two-dot chain line, and the closed lid member 132 and the opening / closing member 134 are indicated by broken lines, respectively. In FIG. 3, the filler pipe 110 and the breather pipe 120 are not shown.

As shown in FIG. 3, the opening forming member 130 has a substantially tubular appearance shape, and forms a supply port 131 into which the refueling nozzle 150 is inserted. The opening forming member 130 is also called a so-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. A 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 prevents foreign matter from entering from the refueling port FC by closing the supply port 131, and opens the supply port 131 by being pushed by the tip portion 152 of the refueling nozzle 150 during refueling. .. The lid member 132 is housed inside the opening forming member 130 in a state where the supply port 131 is open.

The opening / closing member 134 is provided at the downstream end of the opening forming member 130 to open / close the fuel flow path 210. The opening / closing member 134 is normally closed to prevent the fuel vapor from flowing out to the outside of the fuel supply device 100. The opening / closing member 134 is pushed by the tip portion 152 of the refueling nozzle 150 during refueling to open the fuel flow path 210. The opening / closing member 134 is accommodated in the accommodating portion 23 of the nozzle guide 10 described later when 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 outward in the radial direction, and has a so-called fur tree-like appearance shape. As shown in FIG. 2, the pipe connecting portion 136 is press-fitted 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. The nozzle guide 10 is connected to the downstream end of the opening forming member 130 as shown in FIG. 3, and is 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 refueling nozzle 150 to stabilize the refueling property and a function of fixing the breather pipe 120. In the present embodiment, the nozzle guide 10 and the opening forming member 130 are fixed to each other by welding. The nozzle guide 10 has a main body 20 and a connecting member 50.

The main body 20 has a substantially cylindrical external shape and guides the insertion and removal of the refueling nozzle 150. The main body 20 has an insertion portion 22 that constitutes an upstream portion of the main body 20 in the tank direction TD, and a flow path forming portion 26 that forms a downstream portion of the main body 20 in the tank direction TD. ..

As shown in FIG. 3, the tip portion 152 of the refueling nozzle 150 is inserted into the insertion portion 22 at the time of refueling. As shown in FIGS. 2 and 4, a housing portion 23 is formed in a part of the insertion portion 22 in the circumferential direction. As shown in FIG. 3, the accommodating portion 23 accommodates the opening / closing member 134 opened at the time of refueling. The accommodating portion 23 of the present embodiment is formed so as to accommodate the entire opening / closing member 134, but may be formed so as to accommodate a 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 insertion portion 22 in which the accommodating portion 23 is not formed.

The flow path forming portion 26 is connected to the insertion portion 22 in the tank direction TD, and is formed with a diameter smaller than that of the insertion portion 22. The flow path forming portion 26 forms a part of the fuel flow path 210. As shown in FIG. 3, the flow path forming portion 26 is located downstream of the position of the tip portion 152 of the refueling nozzle 150 inserted into the insertion portion 22 at the time of refueling in the tank direction TD. Therefore, the tip portion 152 of the refueling nozzle 150 is not inserted into the flow path forming portion 26. As shown in FIG. 4, a connecting member 50 is provided on the outer peripheral surface 27 of the flow path forming portion 26.

The connecting member 50 is provided on the outer peripheral surface 27 of the flow path forming portion 26. More specifically, it is formed in the tank direction TD when viewed from the accommodating portion 23. In other words, the forming position of the accommodating portion 23 and the forming position of the connecting member 50 in the circumferential direction of the nozzle guide 10 coincide with each other. The connecting member 50 has an external shape as if the tube body is bent in a substantially U shape. As shown in FIG. 3, the upper end portion 51 of the connecting member 50 in the tank direction TD is located downstream of the tip portion 152 of the refueling nozzle 150 inserted into the insertion portion 22 of the main body portion 20 in the tank direction TD. There is.

The connecting member 50 has a function of fixing the breather pipe 120 to the nozzle guide 10 and a function of discharging fuel vapor in the tank direction TD. The connecting member 50 has a connecting portion 52 and a steam flow path forming portion 55.

The connecting portion 52 has a substantially cylindrical appearance shape and extends along the tank direction TD. The connecting portion 52 has a so-called fur tree-shaped outer peripheral surface in which a plurality of protrusions projecting outward in the radial direction 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 is connected to the breather pipe 120.

The nozzle guide 10 of the present embodiment is molded by injection molding using a resin material, and the connecting member 50 and the main body 20 are integrally molded.

FIG. 5 is a partial cross-sectional view illustrating the configuration of the steam flow path forming portion 55. FIG. 5 shows a cross section of the connecting member 50 cut along the VV line shown in FIG. 4 in the same perspective view as in FIG. The steam flow path forming portion 55 communicates with the breather pipe 120 via the connecting portion 52, and forms a part of the steam flow path 220 of the fuel steam flowing in through the breather pipe 120 and the connecting portion 52. One end of the steam flow path forming portion 55 is connected to the connecting portion 52. A discharge flow path forming portion 56 is provided at the other end of the steam flow path forming portion 55. In the present embodiment, the extension direction in which the discharge flow path forming portion 56 is provided coincides with the tank direction TD. In other words, the angle formed by the extension direction and the tank direction TD is 0 °. The angle formed by the extension direction and the tank direction TD is 0 °, which means that the angle is about 0 ° macroscopically. Further, the discharge flow path forming portion 56 is formed in parallel with the connecting portion 52. The discharge flow path forming portion 56 is formed with an opening 57 for returning fuel vapor to the fuel flow path 210 in the filler pipe 110. That is, the opening 57 is formed so as to open in the tank direction TD. In the present embodiment, the formation position of the opening 57 in the tank direction TD coincides with the downstream end of the flow path forming portion 26, but the tank direction TD is higher than the downstream end of the flow path forming portion 26. It may be located on the upstream side or may be located on the downstream side.

The 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. The fuel vapor reaches the connecting portion 52 from the breather pipe 120, passes through the steam flow path forming portion 55, and passes through the discharge flow path forming portion 56 through the opening 57 of the filler pipe 110, as shown by the thick arrow in FIG. It is discharged to the fuel flow path 210 inside. Since the extending direction of the discharge flow path forming portion 56 coincides with the tank direction TD, the flow direction of the fuel vapor discharged from the discharge flow path forming portion 56 is substantially parallel to the tank direction TD. Therefore, the fuel vapor discharged from the opening 57 is flowed in the tank direction TD along with the flow of fuel discharged from the refueling nozzle 150 at the time of refueling. In this way, the fuel vapor can be returned to the fuel tank FT and circulated, and the fuel vapor can be suppressed from flowing out from the fuel filler port FC.

According to the nozzle guide 10 of the first embodiment described above, since the nozzle guide 10 is provided with the connecting member 50 having the connecting portion 52 connected to the breather pipe 120, the nozzle guide 10 is upstream of the breather pipe 120. The end 122 can be fixed. 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 fixing structure of the breather pipe 120 can be simplified and the assembling property of the breather pipe 120 can be improved. Therefore, according to the nozzle guide 10 of the present embodiment, it is possible to guide the insertion and removal of the refueling nozzle 150 to stabilize the refueling property, and to fix the breather pipe 120 to realize the inner breather specification.

Further, since the connecting member 50 has a steam flow path forming portion, the flow of fuel vapor discharged from the breather pipe 120 can be rectified. Therefore, it is possible to suppress the fuel to be refueled from foaming due to the fuel vapor, and it is possible to suppress the deterioration of the refueling property.

Further, the upper end portion 51 of the connecting member 50 in the tank direction TD is located downstream of the position of the tip portion 152 of the refueling nozzle 150 inserted into the nozzle guide 10 at the time of refueling in the tank direction TD. Therefore, when the tip portion 152 of the refueling nozzle 150 hits the inner peripheral surface of the nozzle guide 10, deformation or damage of the 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 provided on the outer peripheral surface of the main body 20 of the nozzle guide 10, it is possible to suppress the flow of fuel discharged from the refueling nozzle 150 from being obstructed, and the refueling nozzle 150 is inserted and removed. It is possible to suppress the inhibition of function. Further, since the connecting member 50 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 downstream of the tip portion 152 of the refueling nozzle 150 in the tank direction TD. The configuration located in can be easily realized. Further, since the connecting member 50 is provided on the outer peripheral surface 27 of the flow path forming portion 26 formed with a diameter smaller than that of the inserting portion 22, the radial dimension of the nozzle guide 10 is increased in order to provide the connecting member 50. It is possible to suppress the increase in size. Further, since the connecting member 50 is integrally molded with the main body 20, it is possible to suppress an increase in the manufacturing process of the nozzle guide 10.

Further, the connecting member 50 is formed in the tank direction TD when viewed from the accommodating portion 23. That is, it is connected to the outer peripheral surface 27 of the flow path forming portion 26 formed with a diameter smaller than that of the inserting portion 22 on the downstream side of the accommodating portion 23 having a larger radial dimension than the other portions of the inserting portion 22. The member 50 is formed. Therefore, since the connecting member 50 is formed inside the accommodating portion 23 in the radial direction, it is possible to suppress an increase in the radial dimension of the nozzle guide 10 in order to provide the connecting member 50. In other words, since the connecting member 50 can be arranged by utilizing the dead space, space saving can be achieved.

Further, since the angle formed by the extension direction in which the discharge flow path forming portion 56 is provided and the tank direction TD is 0 °, the fuel vapor can be rectified toward the tank direction TD and discharged from the opening 57. Therefore, the fuel vapor can be returned to the fuel tank FT and circulated, and the fuel vapor can be suppressed from flowing out from the fuel filler port FC.

Further, since the breather pipe 120 is arranged inside the filler pipe 110, it is possible to prevent the structure of the fuel supply device 100 and the fuel tank FT from becoming complicated. For example, since it is possible to omit forming an opening in the fuel tank FT in order to provide the breather pipe 120, it is possible to suppress an increase in the manufacturing process. Further, for example, the holding member for bundling the resin breather pipe 120 and the filler pipe 110 can be omitted. Therefore, it is possible to suppress an increase in the manufacturing process of the fuel supply device 100 and the fuel tank FT, and it is possible to suppress an increase in the manufacturing cost. Further, as compared with the configuration in which the breather pipe is provided outside the filler pipe, it is possible to suppress a decrease in the degree of freedom of routing, so that the mountability of the fuel supply device 100 can be improved.

B. Second embodiment:
FIG. 6 is a front view showing a schematic configuration of the nozzle guide 10a of the second embodiment. In FIG. 6, for convenience of explanation, the opening forming member 130, the filler pipe 110, and the breather pipe 120 are shown together with the nozzle guide 10a. The nozzle guide 10a of the second embodiment is different from the nozzle guide 10 of the first embodiment in that the connecting member 50a is provided instead of the connecting member 50. Since other configurations are the same as those of the nozzle guide 10 of the first embodiment, the same configurations are designated by the same reference numerals, and detailed description thereof will be omitted.

The connecting member 50a is different from the connecting member 50 of the first embodiment in the direction in which the connecting portion 52a is provided and the extending direction in which the discharge flow path forming portion 56a is provided. The connecting member 50a has an external shape in which the pipe body is bent in a substantially V shape, and the connecting portion 52a and the discharge flow path forming portion 56a are extended in directions away from each other as the tank direction TD is directed. ing.

The connecting portion 52a is formed along a direction intersecting the tank direction TD, and is formed so that the angle formed by the direction in which the connecting portion 52a is provided and the tank direction TD is less than 90 °. The discharge flow path forming portion 56a is formed along a direction intersecting the tank direction TD, and is formed so that the angle formed by the extension direction of the discharge flow path forming portion 56a and the tank direction TD is less than 90 °. ing.

The fuel vapor that has flowed into the connecting member 50a via the breather pipe 120 is discharged to the fuel flow path 210 in the filler pipe 110 through the opening 57 formed in the discharge flow path forming portion 56a. Since the angle formed by the extension direction of the discharge flow path forming portion 56a and the tank direction TD is less than 90 °, the fuel vapor discharged from the opening 57 rides on the flow of fuel discharged from the refueling nozzle 150 at the time of refueling. It is flushed to the tank direction TD.

According to the nozzle guide 10a of the second embodiment described above, it has the same effect as the nozzle guide 10 of the first embodiment. In addition, since the connecting portion 52a and the discharge flow path forming portion 56a are extended in the directions away from each other toward the tank direction TD, when the connecting member 50a and the main body portion 20 are integrally molded by injection molding. It is possible to prevent the connecting member 50a from being undercut, and it is possible to prevent the mold release process from becoming complicated.

C. Third Embodiment:
FIG. 7 is a perspective view showing a schematic configuration of the nozzle guide 10b of the third embodiment. FIG. 8 is an exploded perspective view showing the nozzle guide 10b of the third embodiment in an exploded manner. The nozzle guide 10b of the first embodiment is provided with the main body portion 20b and the connecting member 50b formed separately from each other in place of the main body portion 20 and the connecting member 50. Different from. Since other configurations are the same as those of the nozzle guide 10 of the first embodiment, the same configurations are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 9 is a front view showing a schematic configuration of the main body 20b. FIG. 10 is a side view showing a schematic configuration of the main body portion 20b. As shown in FIGS. 8 to 10, the main body portion 20b has an engaging portion 28b on the outer peripheral surface 27 of the flow path forming portion 26b. The engaging portion 28b has a substantially rectangular parallelepiped external shape formed so as to project outward in the radial direction. As shown in FIGS. 9 and 10, two engaging protrusions 29b are formed on the engaging portion 28b. Each engaging protrusion 29b is formed on the upstream side and the downstream side of the tank direction TD in the engaging portion 28b, respectively. Each engaging protrusion 29b is formed at a radial outer end of the engaging portion 28b. Each engaging protrusion 29b engages with each engaging groove portion 59b described later.

As shown in FIGS. 8 and 10, the engaging portion 28b has a first flow path wall 281, a second flow path wall 282, a third flow path wall 283, and a fourth flow path wall 284. The first flow path wall 281 is in contact with the outer peripheral surface 27 of the flow path forming portion 26b and is formed along the tank direction TD. The second flow path wall 282 is formed parallel to the first flow path wall 281 by a predetermined distance in the radial direction. The third flow path wall 283 constitutes a ceiling portion of the engaging portion 28b, and is connected to each of the upstream end portions 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 28b, and is located at the center of the downstream end portion 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 are formed in parallel with the third flow path wall 283 in the radial direction at a predetermined distance. 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 28b has a tank direction TD and a radial direction. Communication holes 285 are formed along the directions perpendicular to each of the holes. The communication hole 285 functions as a part of the steam flow path 220 of the fuel vapor. That is, each flow path wall 281 to 284 forms a part of the steam flow path 220.

FIG. 11 is a front view showing a schematic configuration of the connecting member 50b. FIG. 12 is a cross-sectional view showing a cross section taken along the line XII-XII of FIG. In FIG. 11, for convenience of explanation, the steam flow path 220 is shown by a broken line.

As shown in FIGS. 8, 11 and 12, the connecting member 50b has an engaged portion 58b that engages with the engaging portion 28b of the main body portion 20b. The engaged portion 58b is formed by hollowing out a part of the steam flow path forming portion 55b of the connecting member 50b in a rectangular parallelepiped shape, and a through hole penetrating the connecting member 50b along the radial direction of the main body portion 20b. Is formed as.

As shown in FIGS. 8 and 11, two engaging groove portions 59b are formed in the engaged portion 58b. Each engaging groove portion 59b is formed on the upstream side and the downstream side of the tank direction TD in the engaged portion 58b, respectively. Each engaging groove portion 59b engages with each engaging projection 29b formed on the engaging portion 28b of the main body portion 20b.

As shown in FIG. 7, in the connecting member 50b, the engaging portion 28b of the main body portion 20b is inserted into the engaged portion 58b, and the engaging projection 29b engages with the engaging groove portion 59b, whereby the main body portion 20b It is engaged and fixed with. The second flow path wall 282 of the connecting member 50b constitutes the outer wall surface of the nozzle guide 10b in a state where the connecting member 50b is engaged and fixed to the main body portion 20b. The third flow path wall 283 and the fourth flow path wall 284 of the connecting member 50b overlap with the inner surface of the steam flow path forming portion 55b in a state where the connecting member 50b is engaged and fixed to the main body portion 20b.

FIG. 13 is a partial cross-sectional view illustrating the configuration of the steam flow path 220. FIG. 13 shows a cross section of the connecting member 50b cut along the line XIII-XIII shown in FIG. 7 in the same perspective view as in FIG. As shown by the thick arrow in FIG. 13, the fuel vapor flows inside the steam flow path forming portion 55b through the communication hole 285 formed by being surrounded by the flow path walls 281 to 284. The second flow path wall 282 does not appear in the cross section shown in FIG. As described above, a part of the steam flow path 220 of the present embodiment is formed by the steam flow path forming portion 55b and the engaging portion 28b.

In assembling the breather pipe 120 to the nozzle guide 10b, after the connecting portion 52 of the connecting member 50b is press-fitted into the upstream end 122 of the breather pipe 120, the engaging portion 28b of the main body portion 20b and the engaged portion of the connecting member 50b are engaged. It may be realized by engaging and fixing with 58b.

According to the nozzle guide 10b of the third embodiment described above, the nozzle guide 10 of the first embodiment has the same effect. In addition, the main body 20b has an engaging portion 28b on the outer peripheral surface 27 of the flow path forming portion 26b, the connecting member 50b has an engaged portion 58b, and the main body 20b and the connecting member 50b are separate from each other. It is molded into the above and is engaged and fixed by the engaging portion 28b and the engaged portion 58b. Therefore, the main body 20b and the connecting member 50b can be separately molded by injection molding or the like, and the main body 20b and the connecting member 50b can be easily fixed to each other. For example, it is possible to prevent the manufacturing process of the nozzle guide 10b from becoming complicated as compared with the configuration in which the connecting member 50b is fixed to the main body portion 20b by welding or the like. Further, since the connecting member 50b can be provided on the outer peripheral surface of the nozzle guide 10b by engaging and fixing, the connecting member 50b is joined to the main body 20b after the connecting portion 52 of the connecting member 50b is press-fitted into the upstream end 122 of the breather pipe 120. Can be integrated. Therefore, the assembling property of the breather pipe 120 can be further improved. Further, the configuration in which the discharge flow path forming portion 56 is formed along the tank direction TD can be realized by omitting the undercut process, and it is possible to suppress an increase in the cost required for manufacturing the nozzle guide 10b.

Further, the engaging portion 28b formed in the main body portion 20b constitutes each flow path wall 281 to 284 forming a part of the steam flow path 220, and the second flow path wall 282 is outside the nozzle guide 10b. It constitutes the wall surface. Therefore, the function of fixing the connecting member 50b to the main body portion 20b and the function of forming a part of the steam flow path 220 can be combined by the engaging portion 28b. Further, since a part of the flow path wall for forming the steam flow path 220 can be omitted in the steam flow path forming portion 55b of the connecting member 50b, it is possible to suppress the increase in size of the connecting member 50b, and the material of the connecting member 50b. The cost can be reduced.

D. Fourth Embodiment:
FIG. 14 is a cross-sectional view showing the configuration of the connecting member 50c included in the nozzle guide of the fourth embodiment. FIG. 14 shows a cross section similar to that of FIG. The connecting member 50c included in the nozzle guide of the fourth embodiment is different from the connecting member 50b included in the nozzle guide 10b of the third embodiment in that two guide portions 54c are further formed. Since the other configurations are the same as those of the connecting member 50b of the third embodiment, the same configurations are designated by the same reference numerals, and detailed description thereof will be omitted.

The two guide portions 54c are each formed as slope-shaped portions in the steam flow path 220 formed in the steam flow path forming portion 55c so as to fill the corners on the upstream side in the tank direction TD. By guiding the flow of the fuel vapor, each guide portion 54c suppresses the turbulence that may occur at the corner of the steam flow path 220, suppresses the pressure loss, and promotes the circulation of the fuel vapor.

According to the nozzle guide provided with the connecting member 50c of the fourth embodiment described above, it has the same effect as the nozzle guide 10b of the third embodiment. In addition, since the connecting member 50c is formed with a guide portion 54c that guides the flow of fuel vapor, pressure loss can be suppressed, the flow of fuel vapor can be made smoother, and the circulation of fuel vapor can be further promoted.

E. Other embodiments:
(1) The connecting members 50, 50a to 50c of each of the above embodiments are formed on the outer peripheral surfaces 27 of the flow path forming portions 26, 26b in the tank direction when viewed from the accommodating portion 23, but are accommodating portions in the circumferential direction. It may be formed at a position deviated from 23. Even with such a configuration, the same effect as that of each of the above-described embodiments can be obtained.

(2) The configurations of the main body portion 20b and the connecting members 50b to c of the third and fourth embodiments are merely examples and can be changed in various ways. For example, in the third and fourth embodiments, the engaging portion 28b has a substantially rectangular parallelepiped appearance shape formed so as to project outward in the radial direction, and the engaged portion 58b is formed as a through hole. However, they may be formed in any shape that can be engaged with each other. Further, for example, an engaging groove portion may be formed in the engaging portion 28b and an engaging protrusion may be formed in the engaged portion 58b. Further, for example, the main body portion 20b and the connecting members 50b to c formed separately from each other may be fixed to each other by an arbitrary fixing method such as welding instead of engaging and fixing. Further, the engaging portion 28b may be in a mode in which a part of the steam flow path 220 is not formed. In such an embodiment, for example, the engaging portion 28b is formed by the engaging protrusions formed on the outer peripheral surface of the main body portion 20b, and the engaged portion 58b of the connecting members 50b to c is formed only by the engaging groove portion 59b. The outer peripheral surface of the main body 20b and the connecting members 50b to 50c may be fixed to each other by welding or the like. Even with such a configuration, the same effect as that of the third and fourth embodiments can be obtained.

(3) In the fourth embodiment, the guide portion 54c is formed on the connecting member 50c, but instead of the guide portion 54c or in addition to the guide portion 54c, each flow path wall 281 of the engaging portion 28b An arbitrary guide portion that can guide the flow of fuel vapor and rectify may be formed inside the 284. That is, the formation position, number, shape, etc. of the guide portion 54c may be arbitrarily changed. Even with such a configuration, the generation of turbulent flow of fuel vapor can be suppressed, and the same effect as that of the fourth embodiment can be obtained.

(4) The configurations of the nozzle guides 10, 10a to 10a and the fuel supply device 100 in each of the above embodiments are merely examples, and can be variously changed. For example, in the nozzle guides 10 and 10a to b, the accommodating portion 23 may be omitted. Further, the connecting portions 52, 52a of the connecting members 50, 50a to 50c are not limited to press-fitting into the upstream end 122 of the breather pipe 120, and may be connected to the breather pipe 120 by any connecting method. Further, 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 each of the above-described embodiments, and can be realized with 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 each form described in the column of the outline of the invention may be used to solve some or all of the above-mentioned problems, or one of the above-mentioned effects. It is possible to replace or combine as appropriate to achieve a part or all. Further, if the technical feature is not described as essential in the present specification, it can be appropriately deleted.

10, 10a to b ... Nozzle guides, 20, 20b ... Main body, 22 ... Insertion, 23 ... Accommodating, 26, 26b ... Flow path forming, 27 ... Outer surface, 28b ... Engaging, 29b ... Engaging Projections, 50, 50a to c ... connecting members, 51 ... upper end, 52, 52a ... connecting parts, 54c ... guides, 55, 55b to c ... steam flow path forming parts, 56, 56a ... discharging flow path forming parts, 57 ... opening, 58b ... engaged part, 59b ... 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 forming member, 131 ... supply port, 132 ... lid member, 134 ... opening / closing member, 136 ... pipe connection, 137 ... protrusion, 150 ... refueling nozzle, 152 ... tip, 210 ... fuel flow path, 220 ... steam flow path, 281 ... first flow path wall, 282 ... second flow path wall, 283 ... third flow path wall, 284 ... fourth Channel wall, 285 ... communication hole, FC ... refueling port, FT ... fuel tank, TD ... tank direction

Claims (6)

A nozzle guide arranged inside a filler pipe that forms a fuel flow path for fuel supplied from a refueling nozzle in a fuel supply device.
The main body that guides the insertion and removal of the refueling nozzle,
A connecting member provided on the outer peripheral surface of the main body and whose upper end is located downstream of the tip of the refueling nozzle inserted into the main body in the tank direction from the fuel filler port to the fuel tank. ,
With
The connecting member
A connection portion disposed inside the filler pipe and connected to a breather pipe for discharging fuel vapor in the fuel tank.
A steam flow path forming portion that communicates with the breather pipe via the connecting portion and forms a part of the steam flow path of the fuel vapor that flows in through the breather pipe and the connecting portion.
Have,
Nozzle guide. The nozzle guide according to claim 1.
The main body portion is formed by connecting the insertion portion into which the tip portion is inserted and the insertion portion in the tank direction and having a diameter smaller than that of the insertion portion to form a part of the fuel flow path. With a part,
The connecting member is provided on the outer peripheral surface of the flow path forming portion.
Nozzle guide. The nozzle guide according to claim 2.
A housing portion capable of accommodating at least a part of an opening / closing member that opens / closes the fuel flow path is formed in a part of the insertion portion in the circumferential direction.
The connecting member is formed in the direction of the tank when viewed from the housing portion.
Nozzle guide. The nozzle guide according to any one of claims 1 to 3.
One end of the steam flow path forming portion is connected to the connection portion, and the other end is provided with a discharge flow path forming portion in which an opening for returning the fuel vapor is formed in the filler pipe.
The angle formed by the extension direction in which the discharge flow path forming portion is provided and the tank direction is 0 ° or more and less than 90 °.
Nozzle guide. The nozzle guide according to claim 4.
The angle is 0 °.
Nozzle guide. The nozzle guide according to any one of claims 1 to 5.
The main body portion has an engaging portion on the outer peripheral surface and has an engaging portion.
The connecting member has an engaged portion that engages with the engaging portion, and is engaged and fixed to the main body portion.
Nozzle guide.

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