WO2015146336A1

WO2015146336A1 - Fuel supply device

Info

Publication number: WO2015146336A1
Application number: PCT/JP2015/053828
Authority: WO
Inventors: 敏彦内藤
Original assignee: 株式会社ケーヒン
Priority date: 2014-03-28
Filing date: 2015-02-12
Publication date: 2015-10-01
Also published as: CN106103965B; JP6433011B2; BR112016019051B1; JP2015190426A; BR112016019051A2; CN106103965A

Abstract

Provided is a fuel supply device in which a fuel pump (4) is held by the pump holding wall (8) of a first housing (1) and the fitted wall (22) of a second housing (2) and the pump holding wall (8), and the fitted wall (22) are connected via a snap-fit mechanism (55). The snap-fit mechanism (55) is configured from: an elastic piece (56) that fits the fitted wall (22) to the inner periphery of the pump holding wall (8) and that extends from the tip of the pump holding wall (8) and comes into contact with the outer surface of the fitted wall (22); a locking hole (57) that is provided to the tip section of the elastic piece (56); and a locking claw (58) that is provided so as to protrude from the outer surface of the fitted wall (22) and that engages with the locking hole (57) as a result of the elastic force of the elastic piece (56). A regulating wall (60) that regulates bending of the elastic piece (56) in the radially outward direction is provided to the second housing (2). As a result, it is possible to provide a fuel supply device in which the engaged state of a snap-fit mechanism can be easily released without interference from an attachment flange.

Description

Fuel supply device

The present invention mainly relates to a fuel supply device that supplies fuel to a fuel injection valve of an engine. The first housing includes a base portion to be closed and a pump holding wall extending from the base portion toward the inside of the fuel tank. The first housing holds the fuel pump in cooperation with the pump holding wall; The present invention relates to an improvement in a fuel supply device in which a second housing having a fuel pipe for guiding fuel discharged from the fuel pump to the fuel take-out pipe is connected via a snap-fit mechanism.

Such a fuel supply apparatus is already known as disclosed in Patent Document 1.

Japanese Unexamined Patent Publication No. 2008-82263

In the one disclosed in Patent Document 1, the snap-fit mechanism includes an elastic piece extending from the tip of the second housing toward the mounting flange, a locking hole provided at the tip of the elastic piece, and a pump holding A locking claw that projects from the outer surface of the wall and engages with the locking hole by the elastic force of the elastic piece. As described above, in the fuel supply device in which the first and second housings are coupled to each other by connecting the pump holding wall and the second housing by the snap fit mechanism, the diameter of the device by the snap fit mechanism is increased. In the above-mentioned disclosure, the tip of the elastic piece is close to the mounting flange. Therefore, the elastic piece is bent outward in the radial direction to engage the snap-fit mechanism. When releasing the state, there is a drawback that the mounting flange becomes an obstacle and the releasing operation becomes difficult.

The present invention has been made in view of such circumstances, and provides the fuel supply device that can easily release the engagement state of the snap-fit mechanism without being obstructed by the mounting flange. Objective.

In order to achieve the above-mentioned object, the present invention has a base part that has a fuel take-out pipe at one end and a mounting flange that is attached to the fuel tank at the other end, and closes the opening of the fuel tank. A first housing has a pump holding wall extending toward the inside of the fuel tank. The first housing holds the fuel pump in cooperation with the pump holding wall, and discharges fuel discharged from the fuel pump from the fuel. In a fuel supply apparatus in which a second housing having a fuel pipe that guides to a pipe is connected via a snap-fit mechanism, a fitting wall that fits on an inner periphery of the pump holding wall is formed in the second housing, An elastic piece extending from the tip of the pump holding wall and in contact with the outer surface of the fitting wall, a locking hole provided at the tip of the elastic piece, and protruding from the outer surface of the fitting wall The snap-fit mechanism is configured by a locking claw that engages with the locking hole by the elastic force of the elastic piece, and the locking claw and the locking hole are formed by bending the elastic piece radially outward. The first feature is that the second housing is provided with a restriction wall for restricting the bending of the elastic piece. The fuel pipe corresponds to an upper descending fuel pipe 28 in an embodiment of the present invention described later.

According to the second feature of the present invention, in addition to the first feature, the inner surface of the restriction wall is formed as an inclined surface that is inclined in a direction away from the elastic piece toward the tip of the elastic piece. To do.

According to the first feature of the present invention, a fitting wall that fits to the inner periphery of the pump holding wall is formed in the second housing, and extends from the tip of the pump holding wall to contact the outer surface of the fitting wall. A snap-fit mechanism with an elastic piece, a locking hole provided at the tip of the elastic piece, and a locking claw protruding from the outer surface of the fitting wall and engaging the locking hole by the elastic force of the elastic piece Therefore, the tip of the elastic piece is oriented in the direction opposite to the mounting flange. Therefore, the elastic piece is deflected radially outward without being obstructed by the mounting flange, and the snap fit mechanism The engaged state can be released. As a result, the first and second housings can be easily separated, which can contribute to improvement in maintainability of the fuel pump and the like. Of course, the snap-fit mechanism is provided between the pump holding wall and the fitting wall, so that the increase in the diameter of the fuel supply device can be suppressed.

In addition, since the bending of the elastic piece is restricted by the restriction wall provided in the second housing, even if the elastic piece is subjected to vibration from the engine or the like, the elastic piece is prevented from being bent radially outward. The engagement state of the snap fit mechanism can be maintained.

According to the second feature of the present invention, when the elastic piece is bent radially outward in order to release the engagement of the snap-fit mechanism, the elastic piece can be It will bend smoothly along the inclined inner surface, disperse the stress received by the elastic piece from the regulating wall, ensure its durability, and reduce the operating load that bends the elastic piece. Can do.

FIG. 1 is a perspective view of a fuel supply apparatus according to an embodiment of the present invention. (First embodiment) FIG. 2 is an exploded perspective view of the fuel supply apparatus. (First embodiment) FIG. 3 is a view taken in the direction of arrow 3 in FIG. (First embodiment) 4 is a cross-sectional view taken along line 4-4 of FIG. (First embodiment) 5 is a cross-sectional view taken along line 5-5 of FIG. (First embodiment) 6 is a cross-sectional view taken along line 6-6 of FIG. (First embodiment) 7 is a cross-sectional view taken along line 7-7 of FIG. (First embodiment) FIG. 8 is an explanatory view of the insertion procedure of the fuel supply device into the opening of the fuel tank bottom plate. (First embodiment)

D ... Fuel supply device T ... Fuel tank Tb ... Opening 1 ... First housing 2 ... Second housing 4 ... Fuel pump 5 ... Fuel take-out pipe 6 ... Mounting flange 7 ... Base 8 ... Pump holding wall 22 ... Fitting wall 23 ... Discharge port reception Tube 28 ... ・ Fuel pipe (Upper descending fuel pipe)
55 ··· Snap fit mechanism 56 ··· Elastic piece 57 ··· Locking hole 58 ··· Locking claw 60 ··· Restricting wall 60a · · · slope

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First embodiment

1 to 6, the present invention supplies the fuel in the fuel tank T to the fuel injection valve (not shown) of the engine on the bottom plate Ta (see FIG. 4) of the fuel tank T mounted on the vehicle. The fuel supply device D is attached.

The fuel supply device D includes a first housing 1 made of synthetic resin attached to a bottom plate Ta of a fuel tank T, and a second housing made of synthetic resin connected to the first housing 1 and disposed in the fuel tank T. 2 and a fuel pump 4 held between the

housings

1 and 2.

The first housing 1 has a bottomed cylindrical base having a fuel take-out pipe 5 at the bottom and a mounting flange 6 attached around the opening Tb of the bottom plate Ta of the fuel tank T at the top to close the opening Tb. And a pair of arc-shaped pump holding walls 8 rising from the bottom of the base 7, and an inner peripheral edge of the mounting flange 6 so as to surround the lower part of the pump holding walls 8 to hold the pump An enclosure wall 10 that defines a fuel reservoir 9 between the wall 8 and a lower descending fuel pipe 11 that is in communication with the fuel take-out pipe 5 and rises from the bottom of the base part 7 are formed integrally. The fuel pipe 11 is integrally connected to the inner peripheral portion of the enclosure wall 10. The fuel reservoir 9 receives the fuel in the fuel tank T through the notch 12 (see FIGS. 1 and 2) of the enclosure wall 10. The fuel take-out pipe 5 can supply fuel to a fuel injection valve of an engine (not shown).

The pair of pump holding walls 8 are arranged so as to constitute mutually opposite side walls of the cylindrical body, and the fuel pump 4 is fitted on the inner periphery of these pump holding walls 8 from above. A bottom stopper 13 (see FIG. 6) that stands from the bottom of the base portion 7 and supports the bottom of the fuel pump 4 is continuously provided on the lower inner surface of the one pump holding wall 8.

The fuel pump 4 has a suction port 15 projecting from its lower end surface, and a T-shaped suction pipe 16 is connected to the suction port 15. The inlet of the suction pipe 16 is accommodated in the fuel reservoir 9. A filter 17 having a circular arc cross section is connected.

In FIG. 5, a vapor discharge pipe 18 for discharging vapor generated in the fuel pump 4 is connected to the lower end surface of the fuel pump 4. The vapor discharge pipe 18 extends upward along the side surface of the fuel pump 4, and a cylindrical filter 19 having an open upper end is attached to an upper end portion thereof. The vapor discharge pipe 18 is integrally provided with a large diameter portion 18a below the cylindrical filter 19, and an orifice 20 is provided in the large diameter portion 18a.

3, 4, and 6, the second housing 2 includes a pair of fitting walls 22 having a circular arc cross section, and a discharge port receiving cylinder 23 that connects one side portions of both the fitting walls 22. A cylindrical regulator holding cylinder 24, and a cylindrical reinforcing cylinder 26 that connects the other side portions of the fitting walls 22 while enclosing the regulator holding cylinder 24 through a gap 25 over substantially the entire length thereof; A plurality of radially arranged ribs 27 connecting the regulator holding cylinder 24 and the reinforcing cylinder 26 across the gap 25, an upper descending fuel pipe 28 connected to one side of the discharge port receiving cylinder 23, and the upper descending A cover cylinder 29 connected to one side portion of the fuel pipe 28 is integrally formed. The upper descending fuel pipe 28 and the regulator holding cylinder 24 are arranged on both sides of the discharge port receiving cylinder 23, and a communication fuel pipe 30 arranged linearly and horizontally so as to connect these three

members

23, 24, 28 is provided. It is formed integrally with the second housing 2. A rectangular boss 31, which is connected to the reinforcing cylinder 26 and has a long side in the horizontal direction, is connected to the end of the communication fuel pipe 30 on the regulator holding cylinder 24 side, and is inserted from the boss 31. A communication hole 30 a is formed in the communication fuel pipe 30 for communicating the inside of the regulator holding cylinder 24, the discharge port receiving cylinder 23, and the upper descending fuel pipe 28.

The opening in the boss 31 of the communication hole 30a from which the core pin is pulled out is closed by a synthetic resin plug 32 having a seal member 33 mounted on the outer periphery.

As shown in FIG. 7, a support plate 35 is formed on the head of the plug body 32, and extends from both ends of the support plate 35 in parallel with the plug body 32 and arranged on both sides of the plug body 32. A pair of elastic hooks 36 extend. On the other hand, the boss 31 has a pair of through-holes 37 through which the pair of elastic hooks 36 can pass, and a locking claw 38 that is located at the back of the through-holes 37 and can be engaged with the elastic hooks 36. Is provided.

Thus, when the plug body 32 is fitted into the opening of the communication hole 30 a and the elastic hook 36 is inserted into the through hole 37 and the plug body 32 is pushed in, the elastic hook 36 engages with the locking claw 38. Thus, the plug body 32 is fixed to the boss 31 and is held in a state in which the seal member 33 is in close contact with the inner peripheral surface of the communication hole 30a. The elastic hook 36 and the locking claw 38 constitute a second snap fit mechanism 55.

As shown in FIGS. 3 and 6, the pair of fitting walls 22 are arranged so as to constitute mutually opposite side walls of the cylindrical body, and the lower part thereof is fitted to the outer periphery of the small diameter part 4 a of the upper part of the fuel pump 4. At the same time, it is fitted to the inner periphery of the pump holding wall 8. The pump holding wall 8 and the fitting wall 22 hold the fuel pump 4 in cooperation.

As shown in FIG. 4, the fuel pump 4 has a discharge port 43 protruding from its upper end surface, and this discharge port 43 is fitted to the inner periphery of the discharge port receiving cylinder 23 via a seal member 44. . The upper descending fuel pipe 28 is fitted to the upper end of the lower descending fuel pipe 11 via a seal member 45. Therefore, the fuel discharged from the discharge port 43 of the fuel pump 4 is supplied to the fuel take-out pipe 5 through the upper down fuel pipe 28 and the lower down fuel pipe 11 from the communication hole 30a.

Further, the outer cylinder 48a of the pressure regulator 48 is press-fitted into the inner periphery of the regulator holding cylinder 24, and the lower cylinder 48a is fixed by caulking the lower end portion of the regulator holding cylinder 24 inward. The pressure regulator 48 releases the excess pressure of the fuel discharged from the discharge port 43 of the fuel pump 4 into the communication hole 30a into the fuel tank T, and supplies the fuel pressure supplied from the fuel take-out pipe 5 to the fuel injection valve. It is adjusted to a predetermined value. *

As shown in FIGS. 3 and 5, the cover tube 29 is fitted to the outer periphery of the large-diameter portion 18a while covering the tubular filter 19 of the vapor discharge pipe 18. Thus, the vapor discharged from the fuel pump 4 to the vapor discharge pipe 18 moves from the cylindrical filter 19 or its upper opening to the cover cylinder 29 and is discharged into the fuel tank T through the orifice 20 of the large diameter portion 18a. The When the pressure in the vapor discharge pipe 18 becomes negative, the fuel in the fuel tank T flows from the orifice 20 into the cover cylinder 29 to a certain level, is filtered by the cylindrical filter 19 and is sucked into the fuel pump 4. Will be.

As shown in FIGS. 1 to 3, a sensor support arm 49 adjacent to one side of the boss 31 protrudes horizontally from one side of the reinforcing cylinder 26. A liquid level sensor 50 is attached to the tip of the sensor support arm 49, and a swing arm that supports the float 51 floating on the fuel liquid level in the fuel tank T at the tip of the rotor 50a of the liquid level sensor 50. 52 are connected. Thus, when the fuel level in the fuel tank T rises and falls due to fuel replenishment to the fuel tank T and fuel consumption in the engine, the float 51 rises and lowers accordingly, so that the level change of the fuel level fluctuates. The swing angle of the arm 52 is transmitted to the liquid level sensor 50, and the liquid level sensor 50 outputs a liquid level signal to a display unit (not shown).

The discharge port receiving cylinder 23, the regulator holding cylinder 24, the reinforcing cylinder 26, the upper descending fuel pipe 28 and the cover cylinder 29 are arranged in parallel with the fitting wall 22. As a result, the fitting wall 22, the discharge port receiving cylinder 23, the regulator holding cylinder 24, the reinforcing cylinder 26, the upper descending fuel pipe 28, the cover cylinder 29 and the rib 27 can be easily formed by a split mold. Become.

As shown in FIGS. 3 and 4, the gap 25 between the regulator holding cylinder 24 and the reinforcing cylinder 26 opens both end surfaces of the regulator holding cylinder 24. By doing so, the waste around the regulator holding cylinder 24, the reinforcing cylinder 26 and the communication fuel pipe 30 is reduced, and the molding failure of the second housing 2 can be eliminated. Moreover, the holding force of the regulator holding cylinder 24 against the pressure regulator 48 is reinforced by the reinforcing cylinder 26 and the rib 27, and the opening / closing vibration sound of the valve body in the pressure regulator 48 is generated by the gap 25 covering the regulator holding cylinder 24 over substantially the entire length. Effectively absorbed. Further, the air gap 25 allows the fuel in the fuel tank T to flow.

The gaps 25 between the plurality of ribs 27 are through holes along the axial direction of the regulator holding cylinder 24. Therefore, not only the rib 27 and the gap 25 can be easily molded, but also the visual line after the molding of the second housing 2 reaches the entire inner surface of the gap 25 and a molding defect can be easily found.

The pump holding wall 8 and the fitting wall 22 are connected to each other via a plurality of snap fit mechanisms 55. The snap-fit mechanism 55 will be described next with reference to FIGS. 1 to 3 and FIG.

A plurality (a pair in the illustrated example) of elastic pieces 56 that extend upward from the fitting wall 22 while being in contact with the outer surface of the fitting wall 22 are integrally connected to the upper ends of the pair of pump holding walls 8. . Therefore, the two sets of elastic pieces 56 are arranged opposite to each other with the central axis of the fuel pump 4 interposed therebetween, and a locking hole 57 is provided at the upper end portion of each elastic piece 56. Each elastic piece 56 can be bent radially outward against its own elastic force. On the other hand, a plurality of locking claws 58 that can engage with the plurality of locking holes 57 are integrally projected on the outer surface of the fitting wall 22. The lower surface 58a of each locking claw 58 is an inclined surface that is inclined upward in a direction away from the outer surface of the fitting wall 22, and the upper surface 58b is a horizontal surface. The snap fit mechanism 55 is comprised by the above.

Thus, the fitting wall 22 is fitted to the inner circumference of the pump holding wall 8 and the outer circumference of the fuel pump 4, and the discharge port receiving cylinder 23 is fitted to the outer circumference of the discharge port 43 of the fuel pump 4. When the descending fuel pipe 28 is fitted to the lower descending fuel pipe 11 and the cover cylinder 29 is further fitted to the large diameter portion 18a of the vapor discharge pipe 18, each elastic piece 56 has a claw at its upper end. When the fuel pump 4 is held by the fitting wall 22 and the pump holding wall 8 when the fuel pump 4 is bent radially outward along the inclined surface 58a of the 58, the elastic claw 58 and the locking hole 57 are aligned. By returning 56 so as to be in contact with the outer surface of the fitting wall 22 by its elastic force, the locking claw 58 and the locking hole 57 can be automatically engaged with each other. Then, the upper edge portion of the locking hole 57 contacts the horizontal surface of the locking claw 58, so that the locking hole 57 is prevented from being detached from the locking claw 58. Thus, the first housing 1 and the second housing 2 are connected via the plurality of snap fit mechanisms 55.

In order to release the engagement of the snap-fit mechanism 55, all the elastic pieces 56 may be bent simultaneously outward in the radial direction to disengage the locking holes 57 from the locking claws 58. 2 can be separated.

A pair of arc-shaped regulating walls 60 that are in contact with the outer surface of the intermediate portion of the elastic piece 56 are formed integrally with the second housing 2 in order to restrict the bending of the elastic piece 56 in the radially outward direction. Since the regulating wall 60 in contact with the outer surface of the intermediate portion of the elastic piece 56 is separated downward from the locking claw 58, the elastic piece 56 is allowed to bend outward in the radial direction, and the snap fit mechanism 55 is released. Enable. At that time, one end of the restriction wall 60 is integrally connected to the sensor support arm 49 and the cover tube 29, and an intermediate portion thereof is integrally connected to the one fitting wall 22 via the rib 61. . In the other regulating wall 60, both end portions thereof are integrally connected to the reinforcing cylinder 26 and the upper descending fuel pipe 28, and an intermediate portion thereof is integrally connected to the other fitting wall 22 via a rib 61. The inner side surface 60a of each regulating wall 60 is formed as a slope inclined so as to go outward in the radial direction.

As described above, the restriction wall 60 formed in the second housing 2 restricts the elastic piece 56 from bending outward in the radial direction. Therefore, even if the elastic piece 56 receives vibration from the engine or the like, the elastic piece 56 overflows. Therefore, the snap fit mechanism 55 can be maintained in an engaged state. Further, when the elastic piece 56 is bent radially outward in order to release the engagement of the snap fit mechanism 55, the elastic piece 56 follows the inclined inner surface of the regulating wall 60 as compared with the case where there is no inclined surface. Thus, the stress received by the elastic piece 56 from the regulating wall 60 can be dispersed to ensure the durability thereof, and the operation load for bending the elastic piece 56 can be reduced.

The plurality of snap fit mechanisms 55 configured as described above are disposed above the enclosure wall 10 that covers the outer periphery of the filter 17 and inside the enclosure wall 10 in plan view. By doing so, the snap fit mechanism 55 can be reduced in diameter without increasing the diameter of the fuel supply device D despite having a relatively large thickness in the radial direction. Therefore, even if the opening Tb of the bottom plate Ta of the fuel tank T has a relatively small diameter, the fuel supply device D can be inserted into the opening Tb.

In particular, the snap fit mechanism 55 is formed on each of the elastic pieces 56 extending from the upper end of the pump holding wall 8, the elastic pieces 56 and the fitting wall 22, and engages with each other by the elastic force of the elastic pieces 56. Since the engaging hole 57 and the engaging claw 58 are configured, the snap fit mechanism 55 can be prevented from increasing in diameter even at the upper part of the fuel supply device D, and the snap fit mechanism 55 can be engaged and released. Can be easily performed without being obstructed by the surrounding wall 10 or the mounting flange 6.

The upper descending fuel pipe 28 and the cover cylinder 29 are arranged between one side of the two sets of elastic pieces 56, and the regulator holding cylinder 24 is arranged between the other side of the two sets of elastic pieces 56. . By doing so, the dead space between the two sets of elastic pieces 56 can be used for the arrangement of the upper descending fuel pipe 28, the cover cylinder 29, and the regulator holding cylinder 24, and the diameter of the upper part of the fuel supply device D can be reduced. be able to. Further, since the upper descending fuel pipe 28, the cover cylinder 29, and the regulator holding cylinder 24 are integrally connected to each other via the restriction wall 60, the strength of the second housing 2 can be increased.

Since the upper descending fuel pipe 28 and the cover cylinder 29 are disposed between one ends of the two sets of elastic pieces 56, the lower descending fuel pipe 11 and the vapor discharge pipe 18 corresponding to the upper descending fuel pipe 28 and the cover cylinder 29, respectively. Is disposed between the fuel pump 4 and the surrounding wall 10 between one side of the pair of pump holding walls 8. In this way, the dead space between the fuel pump 4 and the enclosure wall 10 can be used for the arrangement of the lower descending fuel pipe 11 and the vapor discharge pipe 18, and an increase in the diameter of the lower part of the fuel supply device D can be suppressed. Can do.

As shown in FIGS. 1, 4 and 8, on the other hand, a part of the outer peripheral surface of the fuel pump 4 protrudes from the other side of the pair of pump holding walls 8, and the protruding portion 4b The reinforcing cylinder 26 and the sensor support arm 49 are disposed above the sensor. Thus, when attaching the fuel supply device D to the bottom plate Ta of the fuel tank T, first, as shown in FIG. 8, the fuel supply device D is tilted and the sensor support arm 49 side is inserted into the opening Tb of the bottom plate Ta. Then, the protruding portion 4b of the fuel pump 4 is brought into contact with one side of the inner peripheral edge of the opening Tb, and the contact portion raises the fulcrum and the fuel supply device D vertically, and then the fuel supply device. D is pushed up, and the mounting flange 6 is overlapped with the lower surface of the bottom plate Ta and joined.

As described above, when the fuel supply device D is rotated from the inclined posture to the standing posture, the protruding portion 4b of the fuel pump 4 from between the pair of pump holding walls 8 is arranged on one side of the inner peripheral edge of the opening Tb. The center of the fuel supply device D can be brought as close as possible to one side of the opening Tb, and the fuel supply device D can be easily inserted even when the opening Tb is relatively small.

Further, the boss 31 and the second snap fit mechanism 55 for fixing the plug body 32 to the boss 31 are arranged adjacent to the base of the sensor support arm 49, so that the boss 31 and the second snap fit mechanism are arranged. 55 does not hinder the insertion of the fuel supply device D into the opening Tb.

Further, the upper descending fuel pipe 28 and the cover cylinder 29 are arranged on the opposite side of the fuel pump 4 from the protruding portion 4b with the center of the fuel supply device D interposed therebetween. A chamfer 62 is formed at the corner of the upper end portion of the cylinder 29 opposite to the protruding direction of the sensor support arm 49. Due to the presence of the chamfer 62, when the fuel supply device D is rotated from the inclined posture to the standing posture as described above, the upper descending fuel pipe 28 and the cover cylinder 29 are located on the opening Tb on the side opposite to the fulcrum. It becomes easy to avoid interference with the inner peripheral edge, and even when the opening Tb is relatively small, the fuel supply device D can be more easily inserted.

A coupler 63 protruding to the side of the base portion 7 is formed integrally with the lower portion of the base portion 7, and the coupler 63 holds the terminal 64 for the fuel pump 4 and the terminal 65 for the liquid level sensor 50. The

The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, the base portion 7 of the first housing 1 can be attached to the ceiling plate of the fuel tank T. Further, the locking hole 57 of the snap-fit mechanism 55 can be a bottomed hole instead of a through hole.

Claims

A base part (7) having a fuel take-off pipe (5) at one end and a mounting flange (6) attached to the fuel tank (T) at the other end to close the opening (Tb) of the fuel tank (T) The first housing (1) includes a pump holding wall (8) extending from the base portion (7) toward the fuel tank (T), and the first housing (1) includes the pump holding wall ( A second housing (2) comprising a fuel pipe (28) for holding the fuel pump (4) in cooperation with 8) and guiding the fuel discharged from the fuel pump (4) to the fuel take-out pipe (5) In the fuel supply device formed by connecting the two through the snap-fit mechanism (55),
A fitting wall (22) that fits on the inner periphery of the pump holding wall (8) is formed in the second housing (2), and extends from the tip of the pump holding wall (8) to extend the fitting wall ( 22) an elastic piece (56) in contact with the outer surface, a locking hole (57) provided at the tip of the elastic piece (56), and an outer surface of the fitting wall (22). The snap-fit mechanism (55) is configured by the locking claw (58) engaged with the locking hole (57) by the elastic force of the elastic piece (56), and the elastic piece (56) is radially outward. The engagement of the locking claw (58) and the locking hole (57) is released by the bending of the elastic piece (58), and the restriction wall (60) for restricting the bending of the elastic piece (56) is provided in the first shape. 2 A fuel supply device provided in a housing (2).
The fuel supply device according to claim 1,
A fuel supply device characterized in that the inner side surface of the regulating wall (60) is formed as a slope (60a) that inclines away from the elastic piece (56) toward the tip of the elastic piece (56). .