JP2014051187A - Fuel supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the influence of fuel swelling around an opening of a fuel supply device by an outer peripheral part disposed close to the outer periphery of a metal seal member.SOLUTION: A gun guide member 40 is attached to a connection passage 21 of a resinous filler neck 20. An annular seal part 31 inclined and projected toward an inner diameter and an outer peripheral part 34 close to an outer periphery are disposed at an opening end 28a of an opening part 28 of the filler neck 20 so as to interpose the opening end 28a therebetween. This configuration suppresses a dimensional change of a resinous screw part 48 due to swelling of fuel.

Description

  The present invention relates to a fuel supply apparatus, and more particularly to a fuel supply apparatus having a resin filler neck, a threaded portion, and a gun guide member.

  The fuel refueling device is a device at a location where a fuel pipe for guiding fuel to a fuel tank is connected and a fueling gun is inserted. The fuel cap is usually screwed into the seal member of the fuel supply device except during fuel supply.

  At present, from the viewpoint of reducing the mass and improving the degree of freedom of the shape of the fuel refueling apparatus, it has become the mainstream to change from a metal to a resin. However, since the nozzle portion of the fueling gun is made of metal, the fuel fueling device also comes into contact with the fueling gun, a seal portion that seals the fuel cap of the opening edge flange 21, and a screw that is a screw portion that is screwed to the fuel cap. The protrusion 22 is made of metal (for example, Patent Document 1).

Japanese Patent No. 3759981

  However, the metal screw portion as described above has a complicated shape, and when it is pressed, the screw portion becomes thin, so that processing accuracy is required, and man-hours and labor are required. Therefore, it has been studied that the screw portion is made of resin. In this case, when the screw portion is made of resin, the size of the screw portion is changed due to swelling by the fuel, and it is considered that a gap is generated between the fuel cap and the screw portion.

  In view of the above problems, an object of the present invention is to provide a fuel supply device that can suppress a change in dimensions of a threaded portion.

[Application Example 1]
A fuel refueling device attached to a fuel filler port of a vehicle, wherein a resin filler neck having an opening forming portion that forms an opening portion of a connection path connecting the outside of the vehicle and a fuel tank, and an inner periphery of the opening forming portion A seal part that seals with the fuel cap on the side, and an outer peripheral part that is bent from the seal part and disposed on the outer periphery of the opening forming part, and is attached to the periphery of the opening part of the opening forming part A cylinder having a seal member made of metal and a screw portion that is disposed in the connection path, forms an introduction hole that guides the fuel gun, and is attached to the fuel cap on the inner peripheral side of the introduction hole A resin-made gun guide member, and the outer peripheral portion covers the outer peripheral side of the screw portion in the axial vertical direction in the axial cross section.

  As another application example, in the gun guide member, an inner peripheral end of the seal portion and an upper end portion of the cylindrical portion are in contact, and a holding portion held by an inner peripheral wall of the filler neck is provided below the cylindrical portion. The holding portion may be formed of a reduced diameter portion that follows the neck reduced diameter portion of the opening forming portion or a claw portion that engages with the inner peripheral wall of the opening forming portion.

  According to the application example 1, the outer peripheral portion of the metal seal member also covers the outer periphery of the opening portion of the resin filler neck and the screw portion of the gun guide member indirectly in the axial direction in the axial cross section. Therefore, swelling of the gun guide member and the filler neck opening forming portion due to the fuel in the outer diameter direction can be suppressed by the outer peripheral portion of the metal seal member on the outer peripheral side of the screw portion. It is difficult for deformation to occur, and gaps and interference are less likely to occur between the fuel cap and the screw portion. Further, it is possible to prevent the opening portion around the screw portion from being damaged when the fuel gun is inserted or by a member from the outside of the vehicle.

  According to other application examples, the gun guide member is in contact with the inner peripheral end of the seal member, and whether the reduced diameter portion of the gun guide member is held by the neck reduced diameter portion of the filler neck toward the fuel tank side. Since the claw portion engages with the inner peripheral wall of the filler neck and is clamped in the axial direction, the gun guide member can be assembled with a simple structure and space can be saved.

FIG. 1 is a schematic configuration diagram in which a fuel refueling device is assembled to a fuel tank. FIG. 2 is an axial sectional view of the fuel supply device. FIG. 3 is an exploded perspective view of the fuel supply device.

  Hereinafter, an embodiment of the present invention will be described based on examples.

  FIG. 1 is a schematic configuration diagram in which a fuel refueling device 10 is assembled to a fuel tank FT. The fuel refueling device 10 forms a fuel supply passage 10P that supplies fuel to the fuel tank FT from the outside of the vehicle (in this specification, the direction opposite to the direction from the fuel cap FC toward the fuel tank FT). The filler neck 20, the resin fuel pipe 50, and the tank connecting member 60 are mainly configured.

  On the vehicle exterior side of the filler neck 20, a fuel cap FC is screwed and attached to the seal member 30 and the resin gun guide member 40. When fuel is supplied to the fuel tank FT from the outside of the vehicle, the fuel cap FC is removed, and the nozzle of the fuel gun is inserted into the seal member 30 to a position where fuel can be supplied to supply the fuel. In this case, the nozzle of the fuel supply gun is guided while hitting the gun guide member 40 arranged on the inner peripheral side of the filler neck 20.

  FIG. 2 is a cross-sectional view of the fuel supply apparatus. FIG. 3 is an exploded perspective view of the fuel supply device. The filler neck 20 is made of resin such as HDPE (high density polyethylene), and has an opening forming portion 22 that forms a connection path 21 that connects the outside of the vehicle and the fuel tank FT, a neck reduced diameter portion 23, a main body forming portion 24, and a pipe connection. It is formed from the vehicle outer side in the order of the portion 25. The main body forming part 24 is formed continuously so that the outer diameter and the inner diameter are smaller than the opening forming part 22 and the diameter gradually decreases from the opening forming part 22 to the main body forming part 24. The pipe connecting portion 25 has an outer diameter and an inner diameter smaller than the main body forming portion 24, is continuously formed with the main body forming portion, and has a plurality of annular protrusions 25a into which the fuel pipe 50 is press-fitted on the outer periphery. An outflow hole 26 through which fuel flows out to the fuel pipe 50 is formed at the tip of the pipe connection portion 25.

The opening forming part 22 has an opening forming main body 22a and a welding part 27 having an outer diameter slightly smaller than that of the opening forming main body 22a. An end portion on the vehicle outer side of the welded portion 27 is an opening end 28 a forming an opening portion 28. A plurality of ribs 27a extending in the axial direction are integrally formed on the outer peripheral wall of the welded portion 27 in the circumferential direction. From the receiving portion 27b, which is a step at the boundary between the opening forming body 22a and the welded portion 27, to the front of the opening end 28a. It extends to. The ribs 27a prevent rattling after assembly with a seal member 30 described later.

The seal member 30 is made of metal such as SUS (stainless steel), and has a planar seal portion 31 that is inclined toward the fuel tank FT side on the inner peripheral side and protrudes in an annular shape. The seal part 31 forms an injection hole 32 into which a fuel gun is inserted. An inner peripheral end 33 that is bent from the seal portion 31 toward the fuel tank FT in the axial direction of the injection hole 32 is formed at the tip of the seal portion 31. On the outer periphery of the seal portion 31, an annular outer peripheral portion 34 that is substantially the same as the outer diameter of the welded portion 27 of the filler neck 20 is bent and formed in a substantially U shape in the axial direction from the vehicle outer side. An inner peripheral side of the opening end 28a of the filler neck 20 is disposed on the sealing portion 31 and an outer peripheral portion 34 is disposed on the outer peripheral side to cover the opening end 28a. The outer peripheral end 35 at the end of the outer peripheral portion 34 is in contact with the receiving portion 27 b of the filler neck 20. The outer peripheral end 35 is formed larger than the inner peripheral end 33 in the axial direction toward the fuel tank FT.

The gun guide member 40 is made of a resin such as POM (polyacetal) or PA (polyamide), and as shown in FIG. 2, the first cylindrical portion 42, the first reduced diameter portion 43, and the second cylindrical portion that form the introduction hole 41. 44, a second reduced diameter portion 45, and a third cylindrical portion 46. The second cylindrical portion 44 has a smaller outer diameter and inner diameter than the first cylindrical portion, and is continuously formed by the first reduced diameter portion 43. The third cylindrical portion 46 has a smaller outer diameter and inner diameter than the second cylindrical portion 44 and is continuously formed from the second reduced diameter portion 45, and a lead-out hole 47 is formed that can hold the fuel gun when the fuel gun is inserted. ing. The first cylindrical portion 42 has a screw portion 48 for screwing with the fuel cap FC on the inner peripheral side.

  The outer diameter of each of the first cylindrical portion 42, the first reduced diameter portion 43, and the second cylindrical portion 44 of the gun guide member 40 is such that the gun guide member 40 can be inserted into the filler neck 20 by sliding. The inner diameter of the opening forming portion 22, the neck reduced diameter portion 23, and the main body forming portion 24 of the filler neck 20 is set to be substantially the same or slightly smaller. The gun guide member 40 is held by preventing the first reduced diameter portion 43 from being inserted into the fuel tank FT in the axial direction by the neck reduced diameter portion 23. The upper end portion 42a of the first cylindrical portion 42 is in contact with the inner peripheral end 33 of the seal member 30 in the axial direction, thereby preventing the gun guide member 40 from coming out to the vehicle exterior side.

A claw portion 49 is formed on the second cylindrical portion 44 so as to protrude in the outer diameter direction, and engages with a recess or a protrusion provided on the inner peripheral side of the main body forming portion 24 of the filler neck 20. Thus, the gun guide member 40 can be held and can be prevented from rotating in the circumferential direction.

  The outer peripheral portion 34 of the seal member 30 is assembled so as to cover the outer periphery in the axial vertical direction in the cross section in the axial direction of the threaded portion 48 of the gun guide member 40. In this specification, an axial direction means the direction with respect to the axis | shaft of the connection path 21 of the filler neck 20 shown in FIG. The sealing member 30 is fixed by heating the outer peripheral portion 34 or the welded portion 27 with ultrasonic waves or a hot plate to melt the welded portion 27 and bond the seal member 30 and the welded portion 27 together.

  With the configuration described above, the following effects can be obtained. Since the outer peripheral portion 34 of the metal seal member 30 covers the outer peripheral side of the gun guide member 40, even if a metal piece flies off from the outer peripheral side due to an impact, the opening 28 is not easily damaged. In addition, since the screw portion 48 is made of resin, there is a possibility that the screw portion 48 may swell due to the fuel. Can be prevented.

  Further, the gun guide member 40 has a neck reduced diameter portion 23 in which the inner peripheral end 33 of the seal member 30 comes into contact with the upper end portion 42a in the axial direction from the vehicle outer side and the first reduced diameter portion 43 is inclined toward the inner diameter side. By receiving from the direction of the fuel tank FT in the axial direction, the gun guide member 40 can be easily held in the axial direction. The holding of the fuel tank FT in the direction of dropping off can also be performed by engaging the claw portion 49 of the gun guide member 40 with the main body forming portion 24 of the filler neck 20 instead of the neck reduced diameter portion 23. . The outer peripheral end 35 of the seal member 30 is also in contact with the receiving portion 27b of the filler neck 20, and the seal member 30 is assembled stably.

  Furthermore, since the threaded portion is not formed on the seal member 30 and can have a simple structure, the flatness of the seal portion 31 that seals with the fuel cap FC can be formed with high accuracy. Since the shape is not complicated, the processing cost can be reduced.

  In addition, this invention is not restricted to the said Example, It is possible to implement in a various aspect in the range which does not deviate from the summary. For example, the claw portion 49 of the gun guide member 40 is provided in the second cylindrical portion 44, but may be provided in the first cylindrical portion 42.

DESCRIPTION OF SYMBOLS 10 ... Fuel supply apparatus 10P ... Fuel supply path 20 ... Filler neck 21 ... Connection path 22 ... Opening formation part 23 ... Neck diameter reduction part 24 ... Main body formation part 25- ··· Pipe connecting portion 25a ··· annular protrusion 26 ··· outlet 27 ··· weld portion 27a ··· rib 27b ··· receiving portion 28 ··· opening portion 28a ··· opening end 30 ··· -Seal member 31 ... Seal portion 32 ... Injection hole 33 ... Inner peripheral end 34 ... Outer peripheral portion 35 ... Outer peripheral end 40 ... Gun guide member 41 ... Introducing hole 42 ... -1st cylindrical part 42a ... upper end part 43 ... 1st reduced diameter part 44 ... 2nd cylindrical part 45 ... 2nd reduced diameter part 46 ... 3rd cylindrical part 47 ... derivation | lead-out Hole 48 ... Screw part 49 ... Claw part 50 ... Fuel pipe 60 ... Tank connecting member 61 ... Tank Side connection part 62 ... Flange part 63 ... Check valve
FC ... Fuel cap FT ... Fuel tank

Claims (4)

A fuel refueling device (10) attached to a fuel filler port of a vehicle,
A resin filler neck (20) having an opening forming portion (22) for forming an opening (28) of a connection path (21) connecting the outside of the vehicle and a fuel tank (FT);
A seal portion (31) for sealing with the fuel cap (FC) is formed on the inner peripheral side of the opening formation portion (22), is bent from the seal portion (31), and is disposed on the outer periphery of the opening formation portion (22). A metal seal member (30) mounted on the periphery of the opening (28) of the opening forming portion (22),
A threaded portion that is disposed in the connection path (21), forms an introduction hole (41) that guides the fuel gun, and the fuel cap (FC) is mounted on the inner peripheral side of the introduction hole (41). A resin-made gun guide member (40) having a cylindrical portion (42) having (48),
The said outer peripheral part (34) has covered the outer peripheral side of the said thread part (48) in the axial perpendicular direction in the axial cross section. Fuel supply apparatus. The fuel refueling device according to claim 1,
In the gun guide member (40), the inner peripheral end (33) of the seal portion (31) and the upper end portion (42a) of the cylindrical portion (42) are in contact with each other, below the cylindrical portion (42). A fuel supply apparatus having a holding portion held by an inner peripheral wall of the filler neck (20). The fuel supply device according to claim 2,
The holding portion includes a reduced diameter portion (43) that follows the neck reduced diameter portion (23) that is reduced in diameter from the opening forming portion (22) of the filler neck (20).
Fuel refueling device. It is an oil supply apparatus of Claim 2, Comprising: The said holding part consists of a nail | claw part (49) engaged with the internal peripheral wall of the said filler neck (20),
Fuel refueling device.

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