WO2015151472A1

WO2015151472A1 - Fuel tank lid, fuel pump module having same, and method for manufacturing fuel tank lid

Info

Publication number: WO2015151472A1
Application number: PCT/JP2015/001733
Authority: WO
Inventors: 昇長瀬
Original assignee: 株式会社デンソー
Priority date: 2014-04-01
Filing date: 2015-03-26
Publication date: 2015-10-08
Also published as: JP2015197069A

Abstract

A fuel tank lid has: a resin-made lid section (10) that closes an opening portion (200a) of a fuel tank (200) and carries a driving circuit (400) for a pump (300) installed in the fuel tank; a terminal (30), a center portion (31) of which is covered and protected by insert molding into the lid section, a first end (32) of which is connected to the pump in the fuel tank, a second end (33) of which is connected to the driving circuit outside the fuel tank; a preventive member (50) with which part of the center portion of the terminal is covered such that fuel retained in the fuel tank is prevented from infiltrating an interface between the terminal and the lid section to reach the driving circuit; and a cover part (70) covering the preventive member.

Description

Fuel tank lid, fuel pump module having the same, and fuel tank lid manufacturing method

Cross-reference of related applications

This disclosure is based on Japanese Patent Application No. 2014-75687 filed on April 1, 2014, the contents of which are incorporated herein.

The present disclosure relates to a fuel tank lid including a lid portion and a terminal insert-molded in the lid portion, a fuel pump module having the fuel tank lid, and a method for manufacturing the fuel tank lid.

2. Description of the Related Art Conventionally, as shown in, for example, Patent Document 1, a fuel supply apparatus including a fuel pump housed in a fuel tank, a set plate (flange) that closes the opening of the fuel tank, and a control circuit that controls the fuel pump. Is described. The set plate is provided with a circuit accommodating chamber that is isolated from the fuel tank and accommodates the control circuit, and a conductive path that connects the control circuit and the fuel pump. The conductive path extends from the circuit housing chamber through the set plate to the inside of the fuel tank, and a leakage preventing agent such as a sealant is applied to a part of the conductive path.

As described above, in the fuel supply device disclosed in Patent Document 1, the leakage preventing agent is applied to the conductive path. As a result, the fuel in the fuel tank is prevented from entering the circuit housing chamber along the conductive path. However, when the conductive path coated with this wetting preventive agent is insert-molded with a set plate forming material made of a resin material, there is a risk that the wetting preventing material (suppressing member) will be washed away by heat during the insert molding.

JP 2009-287478 A

Therefore, in view of the above problems, the present disclosure aims to provide a fuel tank lid in which the loss of the restraining member is suppressed, a fuel pump module having the fuel tank cover, and a method for manufacturing the fuel tank lid.

In the first aspect of the present disclosure, a resin lid portion that closes an opening of a fuel tank and mounts a pump drive circuit provided in the fuel tank, and a center portion by being insert-molded in the lid portion Is covered and protected, the first end is connected to the pump inside the fuel tank, the second end is connected to the drive circuit outside the fuel tank, and a part of the center of the terminal is covered, A suppression member that suppresses the fuel stored in the fuel tank from reaching the drive circuit through the interface between the terminal and the lid, and a cover that covers the suppression member.

As described above, according to the present disclosure, the suppressing member is covered with the covering portion. Therefore, unlike the structure in which the suppression member is directly covered by the lid, the loss of the suppression member due to the heat of the resin material forming the lid is suppressed. As a result, it is suppressed that the function of the suppression member is impaired. That is, the fuel is suppressed from reaching the drive circuit through the interface between the terminal and the lid.

The lid portion has a first covering portion that covers the first end portion in the central portion of the terminal, and a second covering portion that covers the second end portion in the central portion of the terminal, and the covering portion is The heat generated when the terminal is insert-molded on the other of the first covering portion and the second covering portion by storing and covering the liquid state suppressing member formed on one of the first covering portion and the second covering portion. This suppresses the loss of the suppressing member.

Since the cover portion is formed on the lid portion as described above, the number of parts is reduced and the manufacturing process is prevented from becoming complicated as compared with the configuration in which the cover portion is a separate member from the lid portion.

The resin material of each of the first covering portion and the second covering portion is the same. According to this, unlike the structure in which the resin material of each of the first covering portion and the second covering portion is different, the bonding between the first covering portion and the second covering portion becomes strong. Therefore, the fuel vaporized through the interface between the first covering portion and the second covering portion is prevented from entering the unintended atmosphere.

The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing
FIG. 1 is a schematic diagram showing a fuel pump module and an internal combustion engine, FIG. 2 is a cross-sectional view showing a schematic configuration of the fuel tank lid according to the first embodiment attached and fixed to a flange. FIG. 3 is a perspective view showing a part of the terminal according to the first embodiment covered with a suppressing member, FIG. 4 is a cross-sectional view for explaining the permeation of vaporized fuel in the first embodiment. FIG. 5 is a cross-sectional view showing a preparation process in the first embodiment, FIG. 6 is a cross-sectional view showing a first molding step in the first embodiment, FIG. 7 is a cross-sectional view showing a forming process in the first embodiment. FIG. 8 is a cross-sectional view showing a second molding step in the first embodiment, FIG. 9 is a cross-sectional view showing a schematic configuration of a fuel tank lid according to a second embodiment attached and fixed to a flange. FIG. 10 is a cross-sectional view showing a preparation process in the second embodiment, FIG. 11 is a cross-sectional view showing a first molding step in the second embodiment, FIG. 12 is a cross-sectional view showing a forming process in the second embodiment. FIG. 13 is a cross-sectional view showing a second molding step in the second embodiment, FIG. 14 is a cross-sectional view showing a schematic configuration of a fuel tank lid according to a third embodiment attached and fixed to a flange. FIG. 15 is a cross-sectional view showing a preparation process in the third embodiment, FIG. 16 is a cross-sectional view showing a first assembly process in the third embodiment, FIG. 17 is a cross-sectional view showing a forming process in the third embodiment. FIG. 18 is a cross-sectional view showing a second assembly step in the third embodiment, FIG. 19 is a cross-sectional view showing a molding process in the third embodiment, FIG. 20 is a cross-sectional view showing a modification of the fuel tank lid in the third embodiment. FIG. 21 is a cross-sectional view showing a preparation process in the modification, FIG. 22 is a cross-sectional view showing a forming process in the modification, FIG. 23 is a cross-sectional view showing an assembly process in the modification. The FIG. 24 is a cross-sectional view showing a molding process in the modification.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
(First embodiment)
The fuel tank lid according to the present embodiment will be described based on FIGS. Hereinafter, the three directions orthogonal to each other are referred to as an x direction, a y direction, and a z direction. In the present embodiment, the z direction is along the vertical direction, and the xy plane defined by the x direction and the y direction is along the horizontal plane.

As shown in FIG. 1, the fuel tank lid 100 is one of the components of the fuel pump module 500. The fuel pump module 500 includes a fuel tank lid 100, a flange 110, a fuel tank 200, a pump 300, and a drive circuit 400. The fuel tank 200 stores fuel in its own hollow, and the opening 200 a is closed by the fuel tank lid 100 and the flange 110. The pump 300 supplies fuel to the internal combustion engine 600 and is provided in the fuel tank 200. The drive circuit 400 drives the pump 300 and is mounted on the fuel tank lid 100 outside the fuel tank 200. As shown in FIG. 1, the pump 300 and the drive circuit 400 are electrically connected via the pump drive wiring 310 and the terminal 30 of the fuel tank lid 100. The fuel pumped up by the pump 300 is supplied to the internal combustion engine 600 via a fuel supply pipe 130 provided on the flange 110 and a fuel pipe 140 assembled to the fuel supply pipe 130. As shown in FIG. 1, the fuel pipe 140 is represented by a broken line.

As shown in FIG. 2, the fuel tank lid 100 is provided in the opening 110 a of the flange 110. An O-ring 120 that is in contact with the fuel tank lid 100 is provided in the opening 110a. The outer ring surface 120a of the O-ring 120 is in contact with the edge of the flange 110 that forms the opening 110a over the entire circumference, and the upper surface 120b is in contact with the fuel tank lid 100 over the entire circumference. As a result, the opening 110 a of the flange 110 is closed by the fuel tank lid 100 and the O-ring 120.

The fuel tank lid 100 includes a lid portion 10, a terminal 30, a suppressing member 50, and a cover portion 70. The lid 10 is made of a resin material, and functions to mount the drive circuit 400 while closing the opening 200a of the fuel tank 200 together with the flange 110. As described above, the lid portion 10 closes the opening portion 110 a of the flange 110 to close a part of the opening portion 200 a of the fuel tank 200.

The lid 10 according to the present embodiment is formed by two-color molding. The lid portion 10 has a first covering portion 11 and a second covering portion 12, and the interface thereof is joined by heat at the time of second molding. Each of the first covering portion 11 and the second covering portion 12 covers a part of the central portion 31 of the terminal 30. Specifically, the second covering portion 12 covers a portion of the central portion 31 on the first end 32 side, and the first covering portion 11 covers a portion of the central portion 31 of the terminal 30 on the second end 33 side. . The 1st coating | coated part 11 and the 2nd coating | coated part 12 consist of the same resin material. As this resin material, a resin material having low fuel permeability is adopted. Specifically, polyphenylene sulfide resin or polybutylene terephthalate resin is employed as a material for forming the covering

portions

11 and 12.

The first covering portion 11 includes a mounting portion 13 on which the driving circuit 400 is mounted, and a surrounding portion 14 that surrounds the terminal 420 that is electrically connected to the terminal 410 of the driving circuit 400. The bottom surface 13a of the mounting portion 13 is joined to the upper surface 12a of the second covering portion 12, and the drive circuit 400 is provided on the upper surface 13b. The upper surface 13b has a concave shape at the center, and a sealant 430 that covers and protects the drive circuit 400 is provided along with the drive circuit 400 in the recessed area. The surrounding portion 14 is integrally connected to the side surface of the mounting portion 13 and surrounds the periphery of the terminal 420 protruding from the mounting portion 13, thereby constituting a connector of the drive circuit 400. The terminal 420 is one of the components of the fuel tank lid 100 because it is insert-molded in the lid portion 10, but is not particularly relevant for describing the fuel tank lid 100 according to the present embodiment. Therefore, in the following, the terminal 420 is not particularly described in order to simplify the description. For example, although the terminal 420 is originally prepared in the preparation process, the illustration thereof is omitted.

On the bottom surface 13a of the first covering portion 11 (mounting portion 13), an annular protruding portion 71 protruding toward the second covering portion 12 (pump 300) is formed. The cover 70 is constituted by the inner ring surface 71a of the protrusion 71 and the bottom surface 71b surrounded by the protrusion 71 on the bottom surface 13a. The cover 70 is filled with the suppressing member 50. The terminal 30 penetrates the bottom surface 71 b, and a part of the terminal 30 located in the cover part 70 is covered with the suppressing member 50. After forming the cover portion 70 together with the first covering portion 11 on the terminal 30, the suppression member 50 in a liquid state is applied to the cover portion 70 so that the periphery of the suppression member 50 is covered by the cover portion 70. By covering the suppression member 50 with the cover portion 70 in this manner, the loss of the suppression member 50 due to heat when the terminal 30 is insert-molded into the second covering portion 12 is suppressed.

The second covering portion 12 covers the terminal 30 in which a part of the central portion 31 is covered with the first covering portion 11 and the suppressing member 50. In the present embodiment, as shown in FIG. 1, the second covering portion 12 is in full contact with the upper surface 120 b that forms the ring shape of the O-ring 120. A connector connected to the pump 300 is configured by surrounding the first end 32 of the terminal 30 exposed from the second covering portion 12 in the fuel tank 200.

The terminal 30 is made of a metal material, and its center part 31 is covered and protected by the lid part 10 by being insert-molded in the lid part 10. Both

end portions

32 and 33 of the terminal 30 are exposed from the lid portion 10, the first end 32 is located in the fuel tank 200 and connected to the pump 300, and the second end 33 is located outside the fuel tank 200. The terminal 410 of the drive circuit 400 is connected. As shown in FIGS. 2 and 3, a part of the central portion 31 is covered and protected by the mounting portion 13, and the rest is covered by the suppressing member 50 and the covering portion 70.

The suppression member 50 covers a part of the central portion 31 to suppress the fuel stored in the fuel tank 200 from reaching the drive circuit 400 through the interface between the terminal 30 and the lid portion 10. To do. The suppressing member 50 and the terminal 30 have higher adhesiveness than the lid portion 10 and the terminal 30, respectively. Therefore, as shown by a solid line arrow in FIG. 4, even if vaporized fuel rises on the suppression member 50 through the interface between the terminal 30 and the lid portion 10, as shown by a broken line arrow in FIG. 4, the suppression member 50 prevents the fuel vapor from rising further. As a result, the vaporized fuel is suppressed from reaching the drive circuit 400 connected to the second end 33 of the terminal 30.

Next, a method for manufacturing the fuel tank lid 100 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 5, first, a terminal 30 is prepared in which the second end 33 is bent to form an L shape. The above is the preparation process.

After the preparation step, a part of the central portion 31 of the terminal 30 is disposed in the cavity of the first mold that forms the first covering portion 11. More specifically, a portion on the second end 33 side connected to the drive circuit 400 in the central portion 31 of the terminal 30 is disposed in the cavity of the first mold. And the resin material of the 1st coating | coated part 11 fuse | melted in the cavity is inject | poured, and it solidifies by cooling. Next, as shown in FIG. 6, the terminal 30 in which a part of the central portion 31 is covered with the first covering portion 11 is taken out from the first mold. In this way, the terminal 30 is insert-molded into the first covering portion 11 to form the first covering portion 11, and the portion on the second end 33 side in the central portion 31 of the terminal 30 is covered with the first covering portion 11. Protect. Further, the cover portion 70 is formed in the first covering portion 11 to suppress the loss of the suppressing member 50 due to the heat (heat during the second forming step) when the terminal 30 is insert-molded in the second covering portion 12. The above is the first molding step.

After the first molding step, as shown in FIG. 7, a liquid state suppressing member 50 is applied to a part of the central portion 31 of the terminal 30 exposed from the first covering portion 11. More specifically, the suppression member 50 in a liquid state is applied to a portion surrounded by the cover portion 70 in the central portion 31 of the terminal 30. And solidify it. In this way, the suppression member 50 corresponding to the hollow shape of the cover portion 70 is formed in the central portion 31 of the terminal 30, the suppression member 50 is covered by the cover portion 70, and the suppression member 50 and the cover portion 70 are bonded. . The above is the forming process.

After the forming step, a part of the central portion 31 of the terminal 30 is disposed in the cavity of the second mold that forms the second covering portion 12. More specifically, the portion other than the covering portion 70, the suppressing member 50 covered by the covering portion 70, and the portion covered by the first covering portion 11 and the suppressing member 50 in the central portion 31 is the second mold. Place in the cavity. And the resin material of the 2nd coating | coated part 12 fuse | melted in the cavity is inject | poured, and it solidifies by cooling. In this way, a part of the central portion 31 is covered with the second covering portion 12, and a part of the bottom surface 13 a of the first covering portion 11 is melted and joined to the second covering portion 12. Next, as shown in FIG. 8, the terminal 30 in which the central portion 31 is entirely covered by the covering

portions

11 and 12 and the suppressing member 50 is taken out from the second mold. In this way, the terminal 30 in which a part of the central portion 31 is covered with the suppressing member 50 is insert-molded into the second covering portion 12 to form the second covering portion 12 and the second covering portion 12 covers the covering portion. The suppressing member 50 exposed at the opening of 70 is covered. The above is the second molding step. The fuel tank lid 100 shown in FIG. 8 is manufactured through the above steps.

Next, functions and effects of the fuel tank lid 100 according to this embodiment will be described. As described above, the suppression member 50 is covered with the cover 70. Therefore, unlike the configuration in which the entire surface of the suppression member 50 is directly covered by the lid portion 10, the loss of the suppression member 50 due to the heat of the resin material forming the lid portion 10 is suppressed. As a result, it is suppressed that the function of the suppressing member 50 is impaired. That is, the fuel is prevented from reaching the drive circuit 400 through the interface between the terminal 30 and the lid 10.

The lid portion 10 includes a first covering portion 11 and a second covering portion 12, and an annular protruding portion 71 protruding toward the second covering portion 12 (pump 300) is formed on the bottom surface 13 a of the first covering portion 11. Is formed. The cover 70 is constituted by the inner ring surface 71a of the protrusion 71 and the bottom surface 71b surrounded by the protrusion 71 on the bottom surface 13a. The cover 70 is filled with the suppressing member 50. With this configuration, the loss of the suppressing member 50 due to heat when the terminal 30 is insert-molded into the second covering portion 12 is suppressed. Moreover, since the cover part 70 is formed in the 1st cover part 11 (lid part 10), compared with the structure whose cover part is a different member from a cover part, a number of parts is reduced and a manufacturing process becomes complicated. It is suppressed.

The first covering portion 11 and the second covering portion 12 are made of the same resin material. According to this, unlike the structure in which the resin material of each of the first covering portion 11 and the second covering portion 12 is different, the bonding between the first covering portion 11 and the second covering portion 12 becomes strong. Therefore, the vaporized fuel is prevented from entering the unintended atmosphere through the interface between the first covering portion 11 and the second covering portion 12.

The periphery of the suppressing member 50 is covered with the covering portion 70 by applying the suppressing member 50 in a liquid state to the covering portion 70. According to this, the suppression member 50 according to the hollow shape of the cover part 70 can be formed in the terminal 30. Further, unlike the configuration in which the cover portion 70 and the suppression member 50 are simply in contact, the cover portion 70 and the suppression member 50 are bonded. Therefore, the covering reliability of the suppressing member 50 by the cover portion 70 is improved, and the vaporized fuel is prevented from entering the drive circuit 400 through the gap based on the surface roughness between the suppressing member 50 and the covering portion 70. Is done.

The resin material of the lid 10 is made of polyphenylene sulfide resin or polybutylene terephthalate resin. Thus, since the cover part 10 consists of a resin material with low fuel permeability, it is suppressed that vaporized fuel permeate | transmits the cover part 10. FIG. As a result, the fuel is suppressed from reaching the drive circuit 400 mounted on the lid 10.

In this embodiment, the cover part 70 is formed in the 1st coating part 11, and the example which forms the 2nd coating part 12 after forming the 1st coating part 11 was shown. However, unlike this, the cover portion 70 may be formed on the second covering portion 11, and the first covering portion 11 may be formed after forming the second covering portion 12.

In the present embodiment, an example in which the suppressing member 50 exposed at the opening of the cover portion 70 is covered with the second covering portion 12 in the second molding step is shown. However, at the time of the forming process, the suppressing member 50 exposed at the opening of the cover part 70 may be covered with a closing member (not shown), and the second forming process may be performed with this covering. According to this, since the suppressing member 50 does not come into direct contact with the second covering portion 12, the outflow of the suppressing member 50 is further effectively suppressed. This specific configuration is shown in FIG. 14 according to the third embodiment, for example.

In the present embodiment, the configuration in which the resin material of the first covering portion 11 and the second covering portion 12 is the same is shown. However, the resin material of the 1st coating | coated part 11 and the 2nd coating | coated part 12 may differ.

(Second Embodiment)
Next, a second embodiment of the present disclosure will be described based on FIGS. 9 to 13. Since the fuel tank cover according to the second embodiment is often in common with that according to the above-described embodiment, the description of the common parts will be omitted below, and different parts will be described mainly. In the following description, the same reference numerals are given to the same elements as those described in the above embodiment.

In the first embodiment, an example in which the lid portion 10 includes the first covering portion 11 and the second covering portion 12 and the covering portion 70 is formed on the first covering portion 11 is shown. On the other hand, in this embodiment, the cover part 10 has only the 1st coating | coated part 11, and the cover part 70 takes the structure similar to the 2nd coating | coated part 12. FIG. That is, the suppressing member 50 is covered by the cover portion 70 having the same configuration as the second covering portion 12.

Since there is the above-described difference, the cover part 70 will be described. The cover portion 70 is made of a resin material having a melting point lower than that of the suppressing member 50. The suppression member 50 is covered with the cover portion 70 by insert molding the terminal 30 whose part of the central portion 31 is covered with the suppression member 50 with the forming material (resin material) of the cover portion 70. The cover portion 70 is made of a resin material having higher fuel permeability than the lid portion 10. Specifically, the cover part 70 is made of polyacetal resin. In the present embodiment, as shown in FIG. 9, the bottom surface 13 a of the mounting portion 13 is joined to the upper surface 70 a of the cover portion 70. The cover 70 is in full contact with the annular upper surface 120 b of the O-ring 120, and is connected to the pump 300 by surrounding the first end 32 of the terminal 30 exposed from the cover 70 within the fuel tank 200. It functions as a connector.

The restraining member 50 and the terminal 30 have higher adhesiveness than the lid 10 and the terminal 30 and the cover 70 and the terminal 30, respectively. Therefore, even if vaporized fuel rises on the suppressing member 50 through the interface between the terminal 30 and the cover portion 70, the vaporized fuel is suppressed from rising further by the suppressing member 50. As a result, the vaporized fuel is suppressed from reaching the drive circuit 400 connected to the second end 33 of the terminal 30.

Next, a method for manufacturing the fuel tank lid 100 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 10, first, a terminal 30 is prepared in which the second end 33 is bent to form an L shape. The above is the preparation process.

After the preparation step, a part of the central portion 31 of the terminal 30 is disposed in the cavity of the third mold that forms the lid portion 10. More specifically, a portion on the second end 33 side connected to the drive circuit 400 in the central portion 31 of the terminal 30 is disposed in the cavity of the third mold. And the resin material of the cover part 10 fuse | melted in the cavity is inject | poured, and it cools and solidifies. Next, as shown in FIG. 11, the terminal 30 in which a part of the central portion 31 is covered with the lid portion 10 is taken out from the third mold. In this way, the terminal 30 is insert-molded into the lid portion 10 to form the lid portion 10, and the portion on the second end 33 side in the central portion 31 of the terminal 30 is covered and protected by the lid portion 10. The above is the first molding step.

After the first molding step, as shown in FIG. 12, a liquid state suppressing member 50 is applied to a part of the central portion 31 of the terminal 30 exposed from the lid portion 10. More specifically, the suppression member 50 in the liquid state is applied to the portion on the first end 32 side connected to the pump 300 rather than the portion covered and protected by the lid portion 10 in the central portion 31 of the terminal 30. And the suppression member 50 in a liquid state is solidified. In this way, the suppressing member 50 is formed in a portion closer to the first end 32 than the portion covered and protected by the lid portion 10 in the central portion 31. The above is the forming process.

After the forming step, a part of the central portion 31 of the terminal 30 is disposed in the cavity of the fourth mold that forms the cover portion 70. More specifically, the part excluding the part covered with the lid part 10 in the central part 31 is arranged in the cavity of the fourth mold. Then, the melted resin material of the cover portion 70 is poured into the cavity and cooled and solidified. Next, as shown in FIG. 13, the terminal 30 in which a part of the central portion 31 is covered by the cover portion 70 is taken out from the fourth mold. In this way, a part of the central part 31 is covered with the cover part 70, and a part of the bottom surface 13 a of the lid part 10 is melted and joined to the cover part 70. Further, the suppressing member 50 is covered by the cover portion 70. The above is the second molding step. The fuel tank lid 100 shown in FIG. 13 is manufactured through the above steps.

Next, functions and effects of the fuel tank lid 100 according to this embodiment will be described. As described above, also in this embodiment, the suppressing member 50 is covered with the cover portion 70. Therefore, the loss of the suppressing member 50 due to the heat of the resin material forming the lid 10 is suppressed. As a result, the fuel is prevented from reaching the drive circuit 400 through the interface between the terminal 30 and the lid 10.

The covering portion 70 is made of a resin material having a melting point lower than that of the suppressing member 50. The terminal 30 whose part of the central portion 31 is covered with the suppressing member 50 is insert-molded into the covering portion 70, so that the suppressing member 50 is covered with the covering portion 70. According to this, the cover part 70 and the suppression member 50 are adhere | attached unlike the structure which a cover part and the suppression member contact only. Therefore, the covering reliability of the suppressing member 50 by the cover part 70 is improved.

The cover portion 70 is made of a resin material, and the lid portion 10 is made of a resin material having a lower fuel permeability than the cover portion 70. According to this, unlike the configuration in which the lid portion 10 is made of a resin material having higher fuel permeability than the cover portion 70, the vaporized fuel is suppressed from passing through the lid portion 10. As a result, the fuel is suppressed from reaching the drive circuit 400.

(Third embodiment)
Next, a third embodiment of the present disclosure will be described based on FIGS. 14 to 19. Since the fuel tank cover according to the third embodiment is often in common with that according to the above-described embodiment, description of common parts will be omitted below, and different parts will be described mainly. In the following description, the same reference numerals are given to the same elements as those described in the above embodiment.

In the second embodiment, an example in which the terminal 30 is insert-molded in the lid portion 10 and the cover portion 70 is shown. On the other hand, in this embodiment, the terminal 30 in which the cover part 70 is mechanically assembled is insert-molded in the lid part 10.

As shown in FIG. 14, the cover part 70 is mechanically assembled to the terminal 30, and the suppressing member 50 is covered with the cover part 70. The cover part 70 includes a groove part 72 that stores the liquid-state suppressing member 50 and a closing part 73 that closes the opening part of the groove part 72. The groove part 72 has the cylinder part 72a and the bottom part 72b which obstruct | occludes one of the two opening parts which the cylinder part 72a has. A through hole for passing the terminal 30 is formed in the bottom portion 72b, and the groove portion 72 is mechanically assembled to the terminal 30 by passing the terminal 30 through the through hole. A through hole for passing the terminal 30 is also formed in the closed portion 73, and the closed portion 73 is mechanically assembled to the terminal 30 by passing the terminal 30 through the through hole. The closing part 73 is mechanically assembled to the terminal 30 so as to close the other of the two openings of the cylindrical part 72a. The cover part 70 is made of a resin material, and the resin material of the lid part 10 and the cover part 70 is the same. The resin material of each of the lid portion 10 and the cover portion 70 is made of polyphenylene sulfide resin or polybutylene terephthalate resin.

As shown in FIG. 14, a part of the central portion 31 of the terminal 30 is surrounded by the suppressing member 50 and the cover portion 70, and the entire outer surface of the cover portion 70 is covered with the lid portion 10. The lid 10 is in full contact with the annular upper surface 120b of the O-ring 120, and the lid 10 surrounds the first end 32 of the terminal 30 exposed from the lid 10 in the fuel tank 200. It functions as a connector connected to the pump 300.

Next, a method for manufacturing the fuel tank lid 100 according to the present embodiment will be described with reference to FIGS. As shown in FIG. 15, first, a terminal 30 having an L shape by bending the second end 33 is prepared. The above is the preparation process.

After the preparation process, as shown in FIG. 16, the groove portion 72 is mechanically assembled to the central portion 31 of the terminal 30. Specifically, the groove portion 72 is mechanically assembled to the central portion 31 by passing the terminal 30 through the through hole formed in the bottom portion 72 b of the groove portion 72. The above is the first assembly process.

After the first assembly step, as shown in FIG. 17, the suppression member 50 in a liquid state is applied to the hollow of the groove portion 72, and the hollow is filled with the suppression member 50. And solidify it. In this way, the suppressing member 50 corresponding to the hollow shape of the groove portion 72 is formed in the central portion 31 of the terminal 30 and the suppressing member 50 and the groove portion 72 are bonded. The above is the forming process.

After the forming step, the closing portion 73 is assembled to the terminal 30 so as to close the opening of the groove portion 72 as shown in FIG. Specifically, the closing portion 73 is mechanically assembled to the central portion 31 by passing the terminal 30 through a through hole formed in the closing portion 73. In this way, the suppressing member 50 is covered with the covering portion 70. The above is the second assembly process.

After the second assembly step, the central portion 31 to which the suppressing member 50 and the cover portion 70 are attached is disposed in the cavity of the fifth mold. And the resin material of the cover part 10 fuse | melted in the cavity is inject | poured, and it cools and solidifies. Next, as shown in FIG. 19, the terminal 30 covered with the central portion 31 by the lid portion 10 is taken out from the fifth mold. Thus, the terminal 30 is insert-molded into the lid portion 10 to form the lid portion 10, and the cover portion 70 is covered and protected by the lid portion 10. The above is the molding process. Through the above steps, the fuel tank lid 100 shown in FIG. 19 is manufactured.

As described above, also in the present embodiment, the suppressing member 50 is attached to a part of the central portion 31 of the terminal 30, and the suppressing member 50 is covered with the covering portion 70. Accordingly, in the same manner as in the first embodiment, when the terminal 30 is insert-molded into the lid portion 10, the loss of the suppression member 50 due to the heat of the resin material forming the lid portion 10 is suppressed. As a result, the fuel is prevented from reaching the drive circuit 400 through the interface between the terminal 30 and the lid 10.

As described in the second embodiment, the suppressing member 50 and the terminal 30 have higher adhesiveness than the lid 10 and the terminal 30. Therefore, even if the vaporized fuel rises on the suppression member 50 through the interface between the terminal 30 and the lid 10, the vaporization fuel is prevented from further rising by the suppression member 50. As a result, the vaporized fuel is suppressed from reaching the drive circuit 400.

The restraining member 50 is covered with the covering portion 70 by mechanically assembling the covering portion 70 to the terminal 30. According to this, unlike the structure in which the suppressing member 50 is insert-molded by the resin material that forms the cover portion 70, the suppressing member 50 is suppressed from being washed away by heat at the time of the insert molding. As a result, the fuel is prevented from reaching the drive circuit 400 through the interface between the terminal 30 and the lid 10.

The covering portion 70 has a closing portion 73 that closes the opening portion of the groove portion 72 in addition to the groove portion 72. According to this, unlike the structure in which the cover part has only the groove part, when the terminal 30 is insert-molded in the cover part 10, the resin material forming the cover part 10 is suppressed from coming into contact with the suppressing member 50. . As a result, the loss of the suppressing member 50 is suppressed, and the fuel is suppressed from reaching the drive circuit 400 through the interface between the terminal 30 and the lid 10.

In the second embodiment, the cover portion 70 is made of a resin material having higher fuel permeability than the lid portion 10, but in this embodiment, the lid portion 10 and the cover portion 70 are made of the same resin material. According to this, the configuration is simplified compared to the configuration in which the lid portion 10 and the cover portion 70 are made of different resin materials. In addition, the bonding strength between the lid 10 and the cover 70 can be increased.

The resin material of each of the lid 10 and the cover 70 is made of polyphenylene sulfide resin or polybutylene terephthalate resin. Thus, since each of the lid portion 10 and the cover portion 70 is made of a resin material having low fuel permeability, it is possible to suppress vaporized fuel from passing through the lid portion 10. As a result, the fuel is suppressed from reaching the drive circuit 400.

In the formation process, the liquid suppressing member 50 is applied to the hollow of the groove 72 and solidified. In this way, the suppressing member 50 corresponding to the hollow shape of the groove portion 72 is formed in the central portion 31 of the terminal 30 and the suppressing member 50 and the groove portion 72 are bonded. According to this, since the shape of the suppression member 50 can be determined according to the hollow shape of the groove part 72, it is suppressed that the shape of the suppression member 50 becomes an unintended shape. Further, since the suppressing member 50 and the groove portion 72 are bonded, vaporization is performed via a gap based on the surface roughness between the suppressing member 50 and the groove portion 72 as compared with the configuration in which the suppressing member 50 and the groove portion 72 are simply in contact with each other. The fuel is prevented from entering the drive circuit 400.

In the second embodiment, the suppressing member 50 is an adhesive having a higher melting point than the cover 70. This is to prevent the suppression member 50 from being washed away by heat at the time of the insert molding when the suppression member 50 is covered by the cover portion 70. However, since the above-described insert molding is not performed in this embodiment, whichever of the upper and lower relationships of the melting points of the forming material of the suppressing member 50 and the cover portion 70 may be higher.

In the present embodiment, an example is shown in which a through hole is formed in the bottom 72b of the groove 72, and the groove 72 is fixed to the terminal 30 by passing the terminal 30 through the through hole. However, the groove 72 may be formed in the terminal 30 by insert molding. According to this, it is not necessary to form a through-hole in the bottom part 72b of the above-mentioned groove part 72, and the space | gap between the terminal 30 and the edge part which comprises a through-hole does not arise.

In this embodiment, the cover part 70 has the groove part 72 and the closure part 73 which obstruct | occludes the opening part, and the groove part 72 has the bottom part 72b which obstruct | occludes one of the cylinder part 72a and the two opening parts. Indicated. However, as shown in FIG. 20, a configuration in which the suppressing member 50 includes an upper portion 72c that closes the other of the two openings in addition to the cylindrical portion 72a and the bottom portion 72b described above may be employed. In this case, a through hole is formed in each of the bottom portion 72b and the upper portion 72c, and the groove portion 72 is mechanically assembled to the terminal 30 by passing the terminal 30 through the through hole.

The fuel tank lid 100 shown in FIG. 20 is manufactured through the steps shown in FIGS. As shown in FIG. 21, first, a terminal 30 having an L shape by bending the second end 33 is prepared. The above is the preparation process.

After the preparation step, as shown in FIG. 22, the suppressing member 50 is applied to the central portion 31 of the terminal 30 to solidify it. In this way, the suppressing member 50 is formed in the central portion 31. The above is the forming process.

After the forming step, the cover 70 is mechanically assembled to the terminal 30 as shown in FIG. Specifically, the cover portion 70 is mechanically assembled to the central portion 31 by passing the terminal 30 through the through holes formed in the bottom portion 72b and the upper portion 72c of the cover portion 70, respectively. In this way, the suppressing member 50 is covered with the covering portion 70. The above is the assembly process.

After the assembling process, the central part 31 to which the suppressing member 50 and the cover part 70 are attached is placed in the cavity of the fifth mold, and the molten resin material of the lid part 10 is injected into the cavity and solidified by cooling. Next, as shown in FIG. 24, the terminal 30 covered with the lid 10 is taken out from the fifth mold. The above is the molding process. The fuel tank lid 100 shown in FIG. 24 is manufactured through the above steps.

As described above, in the present embodiment, the cover portion 70 has the groove portion 72 and the closing portion 73. However, the cover portion 70 may be configured to have only the groove portion 72.

The preferred embodiments of the present disclosure have been described above. However, the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure.

In each embodiment, an example in which the fuel tank lid 100 and the flange 110 are separate bodies is shown. However, the lid 10 and the flange 110 of the fuel tank lid 100 may be integrated. In this case, the fuel tank lid 100 alone closes all the openings 200 a of the fuel tank 200.

Although the fuel tank lid 100 has been mainly described in each embodiment, the fuel pump module 500 including the fuel tank lid 100, the above-described fuel tank 200, the drive circuit 400, and the pump 300 is included in the present disclosure. ing.

Claims

A resin lid (10) for closing the opening (200a) of the fuel tank (200) and mounting the drive circuit (400) of the pump (300) provided in the fuel tank;
The center part (31) is covered and protected by insert molding to the lid part, the first end (32) is connected to the pump in the fuel tank, and the second end (33) is outside the fuel tank. A terminal (30) connected to the drive circuit at
A restraining member that prevents a fuel stored in the fuel tank from reaching the drive circuit through the interface between the terminal and the lid by covering a part of the central portion of the terminal. (50),
A fuel tank lid having a cover (70) covering the restraining member.
The lid portion includes a first covering portion (11) that covers the portion on the first end side in the central portion of the terminal, and a second covering portion that covers the portion on the second end side in the central portion of the terminal. (12)
The covering portion is formed on one of the first covering portion and the second covering portion, and stores and covers the restraining member in a liquid state, so that the other of the first covering portion and the second covering portion is stored. The fuel tank lid according to claim 1, wherein a flow of the restraining member due to heat when the terminal is insert-molded is suppressed.
The fuel tank cover according to claim 2, wherein the resin material of each of the first covering portion and the second covering portion is the same.
4. The fuel tank cover according to claim 3, wherein the resin material of each of the first covering portion and the second covering portion is made of polyphenylene sulfide resin or polybutylene terephthalate resin.
The covering portion is made of a resin material having a melting point lower than that of the suppressing member,
The said suppression member is covered with the said cover part by insert-molding the said terminal with which the said center part was coat | covered with the said suppression member by the resin material which forms the said cover part. Fuel tank lid.
The fuel tank cover according to claim 1, wherein the cover member is mechanically assembled to the terminal, whereby the suppression member is covered with the cover portion.
The fuel tank cover according to claim 6, wherein the cover portion has a groove portion (72) that stores and covers the suppression member in a liquid state by being mechanically assembled to the terminal.
The fuel tank cover according to claim 7, wherein the cover portion has a closed portion (73) that closes the opening portion of the groove portion and covers the suppression member in addition to the groove portion.
The covering portion is made of a resin material,
The fuel tank lid according to any one of claims 5 to 8, wherein the lid portion is made of a resin material having lower fuel permeability than the cover portion.
The resin material of the lid portion is made of polyphenylene sulfide resin or polybutylene terephthalate resin,
The fuel tank lid according to claim 9, wherein the resin material of the covering portion is made of polyacetal resin.
The covering portion is made of a resin material,
The fuel tank lid according to any one of claims 6 to 8, wherein a resin material of each of the lid and the cover is the same.
The fuel tank lid according to claim 11, wherein the resin material of each of the lid portion and the cover portion is made of polyphenylene sulfide resin or polybutylene terephthalate resin.
A fuel tank lid (100) according to any of claims 1 to 12,
A fuel tank (200) whose opening (200a) is closed by the fuel tank lid;
A drive circuit (400) mounted on the fuel tank lid;
And a pump (300) provided in the fuel tank and driven by the drive circuit.
A method of manufacturing a fuel tank lid according to claim 2,
A first molding step of insert-molding the terminal (30) in one of the first covering portion (11) and the second covering portion (12);
After the first forming step, a forming step of forming the suppressing member (50) on the terminal;
After the forming step, the second forming step of insert molding the terminal on the other of the first covering portion and the second covering portion,
In the first forming step, the covering portion (70) that suppresses the loss of the suppressing member due to heat during the second forming step by covering the suppressing member is formed between the first covering portion and the second covering portion. Formed on one side,
In the forming step, the suppressing member is covered with the covering portion by storing and solidifying the suppressing member in a liquid state in the covering portion,
In the second molding step, a method of manufacturing a fuel tank lid, wherein the terminal is insert-molded on the other of the first covering portion and the second covering portion in a state where the suppressing member is covered by the covering portion.
A method of manufacturing a fuel tank lid according to claim 5,
A first molding step of insert-molding the terminal (30) in the lid (10);
After the first forming step, a forming step of forming the suppressing member (50) on the terminal;
After the forming step, a method of manufacturing a fuel tank lid, comprising: a second forming step of covering and protecting the restraining member with the cover portion by insert-molding the terminal in the cover portion (70).
A method of manufacturing a fuel tank lid according to any one of claims 6 to 8,
A first assembly step of mechanically assembling the cover (70) to the terminal (30);
After the first assembly step, a forming step of forming the suppression member by applying and solidifying the suppression member (50) in a liquid state in the hollow of the cover portion;
A method of manufacturing a fuel tank lid, comprising: after the forming step, insert molding the terminal (30) to which the suppressing member and the cover portion are attached to the lid portion (10).
A method of manufacturing a fuel tank lid according to claim 6,
Forming the restraining member (50) on the terminal (30);
After the forming step, an assembly step of covering the suppression member with the cover portion by mechanically assembling the cover portion (70) to the terminal;
After the said assembly | attachment process, the shaping | molding process which insert-molds the said terminal to which the said suppression member and the said cover part were attached to the said cover part (10), The manufacturing method of a fuel tank cover.