CN108223216B

CN108223216B - Fuel supply device

Info

Publication number: CN108223216B
Application number: CN201711329662.3A
Authority: CN
Inventors: 高桥浩之
Original assignee: Aisan Industry Co Ltd
Current assignee: Aisan Industry Co Ltd
Priority date: 2016-12-13
Filing date: 2017-12-13
Publication date: 2020-05-08
Anticipated expiration: 2037-12-13
Also published as: CN108223216A; JP2018096282A

Abstract

The invention provides a fuel supply device. The fuel supply device is constructed as follows: the elastic support member for supporting the housing portion accommodating the fuel pump to the reservoir cup can appropriately absorb the radial vibration and the circumferential vibration of the housing portion, and is easy to ensure the rigidity and simpler in structure. The fuel supply device comprises a fuel pump, a cylindrical housing part containing the fuel pump, a storage cup containing the housing part, and more than two elastic supporting members for elastically supporting the housing part on the inner side of the storage cup, wherein at least 1 of the elastic supporting members is an elastic supporting member formed by integrally connecting a part of a radial supporting member and a part of a circumferential supporting member by a connecting part, the radial vibration absorbing part of the radial supporting member can absorb vibration in the radial direction of the housing orthogonal to the axis of the housing, and the circumferential vibration absorbing part of the circumferential supporting member can absorb vibration in the circumferential direction of the housing around the axis of the housing.

Description

Fuel supply device

Technical Field

The present invention relates to a fuel supply device for supplying fuel in a fuel tank mounted on a vehicle such as an automobile to an internal combustion engine.

Background

A vehicle having an internal combustion engine is provided with a fuel supply device for supplying fuel of a fuel tank to the internal combustion engine. The fuel supply device includes a fuel pump, a housing portion in which the fuel pump is housed, and a reservoir cup in which the housing portion is housed inside by an elastic support member. A fuel supply pipe is connected to a fuel discharge pipe of the fuel pump, and the fuel is pressurized and delivered from the fuel tank to the internal combustion engine. The fuel pump vibrates in accordance with the pressure-feeding operation of the fuel pump. The vibration of the fuel pump mainly includes a radial vibration perpendicular to a housing axis, which is an axis of a housing portion in which the fuel pump is housed, and a circumferential vibration around the housing axis. Vibration of the fuel pump may be transmitted from the housing portion to the outside of the fuel tank via the elastic support member, and may become noise. In order to reduce this noise, it is necessary to efficiently absorb the radial vibration and the circumferential vibration by the elastic support member so that the radial vibration and the circumferential vibration of the housing portion are not transmitted to the reservoir cup. Therefore, various shapes and structures have been proposed for the shape and structure of the elastic support member.

For example, patent document 1 discloses a fuel tank for an automobile, in which a fixed ring fixed to a storage container (corresponding to a storage cup) and a support skirt (corresponding to a case) in which a fuel pump is housed are coupled to each other by 8 branch portions (corresponding to elastic support members) formed by bending an elastically deformable plate-like member into a U-shape in a radial direction. The width direction of each branch portion is a circumferential direction, and each branch portion elastically deforms in the plate thickness direction and absorbs vibration with respect to vibration in the radial direction, and each branch portion elastically deforms in a torsional manner with respect to vibration in the circumferential direction and absorbs vibration.

Further, for example, patent document 2 discloses a fuel pressure-feed device in which a reservoir (corresponding to a reservoir cup) and a pump holder (corresponding to a housing portion) that houses a fuel pump are connected to each other by 3 holding members (corresponding to elastic support members) that are formed by bending an elastically deformable plate-like member in a complicated manner in a circumferential direction. The holding members are arranged in a radial direction in the plate width direction, and elastically deform in the plate thickness direction to absorb vibration in the circumferential direction, and elastically deform in a torsional manner to absorb vibration in the radial direction.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication No. 2004-514580

Patent document 2: japanese Kohyo publication No. 2013-508614

Disclosure of Invention

Problems to be solved by the invention

The branch portion (corresponding to the elastic support member) described in patent document 1 can effectively absorb vibration by bending in the plate thickness direction with respect to vibration in the radial direction, but cannot absorb vibration without twisting in the plate width direction with respect to vibration in the circumferential direction, and therefore the plate width must be set to be equal to or less than the plate width that can be torsionally deformed. Therefore, the rigidity of each branch portion is reduced, and it is estimated that 8 branch portions are necessary.

Further, the holding member (corresponding to the elastic support member) described in patent document 2 can effectively absorb vibration by flexing in the plate thickness direction with respect to vibration in the circumferential direction, but cannot absorb vibration without twisting in the plate width direction with respect to vibration in the radial direction, and therefore, it is necessary to set the plate width to be equal to or less than the plate width that can be torsionally deformed, as in patent document 1. Therefore, the rigidity of each holding member is reduced, but it is estimated that the rigidity is ensured by bending the holding member complicatedly to have a complicated shape.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a fuel supply device in which an elastic support member for supporting a housing portion accommodating a fuel pump to a reservoir cup is configured to be able to appropriately absorb radial vibration and circumferential vibration of the housing portion, and which is configured to have a structure that is easy to ensure rigidity and a simpler structure.

Means for solving the problems

In order to solve the above problems, the present invention takes the following measures. First, the invention according to claim 1 is a fuel supply device including a fuel pump, a cylindrical case portion housing the fuel pump, a reservoir cup housing the case portion, and two or more elastic support members for elastically supporting the case portion inside the reservoir cup, wherein at least 1 of the plurality of elastic support members includes: a radial support member formed of a plate-shaped elastic member, having a 1 st plate width in a housing circumferential direction around a housing axis which is an axis of the housing portion, and having a 1 st plate thickness thinner than the 1 st plate width in a direction orthogonal to the 1 st plate width, the radial support member having a radial vibration absorbing portion capable of absorbing vibration of the housing portion with respect to the reservoir cup and vibration in a housing radial direction orthogonal to the housing axis; and a circumferential support member formed of a plate-shaped elastic member, having a 2 nd plate width in the shell radial direction, and having a 2 nd plate thickness thinner than the 2 nd plate width in a direction orthogonal to the 2 nd plate width, the circumferential support member having a circumferential vibration absorbing portion capable of absorbing vibration of the shell portion with respect to the reservoir cup and vibration in the shell circumferential direction, a part of the radial support member and a part of the circumferential support member being integrally coupled by a coupling portion.

Next, the 2 nd invention is the fuel supply device according to the 1 st invention, wherein the circumferential vibration absorbing portion is disposed on both sides of the radial vibration absorbing portion so as to sandwich at least a part of the radial vibration absorbing portion from the housing circumferential direction, and is disposed at a position spaced apart from at least a part of the radial vibration absorbing portion sandwiched from the housing circumferential direction by a predetermined interval in the housing circumferential direction.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the invention of claim 1, the elastic support member is integrally formed by combining a radial support member having a radial vibration absorbing portion and a circumferential support member having a circumferential vibration absorbing portion. The elastic support member absorbs radial vibration by the radial vibration absorbing portion and absorbs circumferential vibration by the circumferential vibration absorbing portion. Further, since the radial vibration absorbing portion and the circumferential vibration absorbing portion are separated from each other, the radial vibration and the circumferential vibration can be appropriately absorbed, and the plate width of the radial vibration absorbing portion and the plate width of the circumferential vibration absorbing portion can be freely set, respectively, the rigidity can be easily ensured, and the vibration absorbing device can be realized with a simple structure.

According to the 2 nd aspect of the invention, the circumferential vibration absorbing portion is disposed so as to be sandwiched from the housing in the circumferential direction, with a predetermined space provided between both sides of the radial vibration absorbing portion. Thus, when the casing portion vibrates in the circumferential direction and the circumferential vibration absorbing portion elastically deforms in the circumferential direction, the circumferential vibration absorbing portion can elastically deform in the circumferential direction until it abuts against the radial vibration absorbing portion. That is, the predetermined interval can restrict excessive movement of the fuel pump in the circumferential direction.

Drawings

Fig. 1 is a perspective view illustrating a schematic overall structure of a fuel supply device.

Fig. 2 is a front view illustrating the fuel supply apparatus.

Fig. 3 is a schematic perspective view (side view) illustrating a housing portion in which a fuel pump is housed, a reservoir cup having a support cover portion, and an elastic support member connecting the support cover portion and the housing portion.

Fig. 4 is a schematic perspective view (perspective view) illustrating a housing portion in which a fuel pump is housed, a reservoir cup having a support cover portion, and an elastic support member connecting the support cover portion and the housing portion.

Fig. 5 is a perspective view illustrating an appearance of the elastic support member in which the radial support member and the circumferential support member are integrated.

Fig. 6 is a perspective view illustrating an appearance of the radial support member.

Fig. 7 is a perspective view illustrating an appearance of the circumferential support member.

Fig. 8 is a view (front view) of the elastic support member shown in fig. 5 as viewed from the direction a.

Fig. 9 is a view (side view) of the elastic support member shown in fig. 5 as viewed from the direction B.

Fig. 10 is an X-X sectional view of fig. 8.

Fig. 11 is a diagram illustrating the limitation of the movement in the circumferential direction (the amplitude of the circumferential vibration) of the case portion in which the fuel pump is housed by the circumferential vibration limitation interval (corresponding to a predetermined interval).

Fig. 12 is a diagram illustrating an example of the arrangement in the case where two elastic support members are provided.

Fig. 13 is a diagram illustrating an example of arrangement in the case where 4 elastic support members are provided.

Description of the reference numerals

10. A fuel supply device; 12. a fuel tank; 12a, an upper wall portion; 12b, a lower wall portion; 13. an opening part; 14. a fuel ejection pipe; 16. a cover member; 20. an elastic support member; 20A, a radial support member; 20B, a shell connecting part; 20C, a radial member joint; 20D, a radial vibration absorbing portion; 20E, a circumferential support member; 20F, a support cover connection part; 20G, a circumferential member joint; 20H, a circumferential vibration absorbing portion; 21A, 1 st plate thickness; 21B, 1 st board width; 21C, 1 st plate length; 21H, housing connection height; 22A and 2 nd plate thickness; 22B, 2 nd plate width; 22C, 2 nd plate length; 23. a circumferential movement limiting interval; 24. a radial movement restriction interval; 26. a sidewall portion; 28. a bottom wall portion; 28a, small protrusions; 30. a pump unit; 31. a fuel pump; 31A, a housing portion; 31J, housing axis; 32. a storage cup; 32A, a support cover; 33. an electrical connector; 34. a guide cylinder part; 38. a connecting shaft; 39. a spring; 40. a pump holder; 54. a fuel piping portion; 62. a cross pipe section; 65. and a communicating pipe.

Detailed Description

● [ general overall structure of fuel supply device for internal combustion engine (FIGS. 1 and 2) ]

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present embodiment is applied to a fuel supply device that supplies fuel in a fuel tank mounted on a vehicle such as an automobile on which an engine (internal combustion engine) is mounted to the engine. Fig. 1 is a perspective view illustrating a fuel supply apparatus, and fig. 2 is a front view thereof. Arrows in the drawing indicate the front, rear, left, right, and up and down directions of the fuel supply device. The vertical direction corresponds to a direction of gravity in a state of being mounted on a fuel tank of a vehicle, i.e., a so-called vertical direction. In addition, the front, rear, left, and right directions are not specified.

As shown in fig. 2, the fuel supply device 10 is provided in the fuel tank 12. A reservoir cup 32 is disposed in the fuel tank 12. The fuel supply device 10 supplies fuel stored in the reservoir cup 32 to the outside of the fuel tank 12, that is, to an engine (not shown). The fuel tank 12 is, for example, a hollow resin container having an upper wall portion 12a and a lower wall portion 12b which are horizontally parallel to each other in the vertical direction. A circular opening 13 is formed in the upper wall portion 12 a. The fuel is, for example, a liquid fuel such as gasoline.

The fuel supply apparatus 10 includes a cover member 16 and a pump unit 30. The cover member 16 is made of resin and formed in a disc shape. The lid member 16 is attached to the upper wall portion 12a so as to seal the opening 13 of the fuel tank 12. The cover member 16 includes the fuel ejection pipe 14 and an electrical connector 33. Although not shown, a fuel supply pipe for supplying fuel to the engine is connected to the fuel discharge pipe 14 on the upper surface side of the cover member 16. An external connector (not shown) connected to an external power supply is connected to the electrical connector 33. The fuel discharge pipe 14 supplies the fuel discharged from the fuel pump 31 on the pump unit 30 side to the fuel supply pipe. The fuel pump 31 is a friction type electric fuel pump. The fuel pump 31 has a substantially cylindrical pump body, and a pump portion and a motor portion are provided therein. The fuel pump 31 generates a fuel suction force by rotating a rotating member such as an impeller of the pump section by driving of the motor section. Further, the electrical connector 33 supplies the fuel supply device 10 with electric power from an external connector. Further, components of the fuel supply apparatus 10 other than the lid member 16 are housed in the fuel tank 12.

The pump unit 30 includes a reservoir cup 32 and a pump holder 40. The pump holder 40 is assembled with the fuel pump 31, a fuel filter device, a pressure regulating valve, a relay pipe, and an injection pump, which are not shown. The pump holder 40 is made of resin, and includes a housing portion 31A, a fuel pipe portion 54, a support lid portion 32A, and an elastic support member 20. The case 31A is formed in a cylindrical shape.

The reservoir cup 32 is, for example, a cup-shaped container made of resin, and has a side wall portion 26 having a D-letter shape and a bottom wall portion 28 closing a lower surface opening of the side wall portion 26. A plurality of small projections 28a project from the lower surface of the bottom wall portion 28, and the small projections 28a ensure a predetermined gap between the bottom wall portion 28 and the lower wall portion 12 b.

As shown in fig. 2, two right and left coupling shafts 38 are provided between the reservoir cup 32 and the lid member 16, and the coupling shafts 38 couple the two

members

32, 16 so as to be extendable and retractable in the vertical direction. The coupling shaft 38 is formed of, for example, a solid shaft material or a hollow shaft material made of metal. One end (upper end) of each connecting shaft 38 is attached to the cover member 16 in a suspended manner by press fitting. The other end (lower end) of each connecting shaft 38 is inserted through each guide tube portion 34 of the reservoir cup 32 so as to be slidable within a predetermined range in the axial direction (vertical direction) with respect to each guide tube portion 34.

A spring 39 made of, for example, a metal coil spring is fitted to one side (for example, the left side) of the coupling shaft 38. The spring 39 is interposed between the cover member 16 and the guide cylinder portion 34. The spring 39 urges in a direction to separate the reservoir cup 32 and the lid member 16 from each other. That is, the reservoir cup 32 is elastically pressed against the lower wall portion 12b of the fuel tank 12 by the urging force of the spring 39. Therefore, even if the fuel tank 12 expands and contracts due to a change in internal pressure or a change in the amount of fuel caused by a change in temperature, the reservoir cup 32 is kept constantly pressed against the lower wall portion 12 b.

Next, the operation of the fuel supply device 10 will be described. By operating the fuel pump 31, the fuel in the reservoir cup 32 is sucked in through a fuel filter (not shown), pressurized, and then discharged into the horizontal pipe portion 62 of the fuel pipe portion 54. The pressurized fuel is supplied to the engine through the fuel discharge pipe 14 of the cover member 16 via the communication pipe 65.

● [ positions of connection of the elastic support member 20 for supporting the case 31A in the storage cup 32, etc. (FIGS. 3 and 4) ]

The pump unit 30 shown in fig. 3 and 4 is a schematic view and a perspective view of fig. 2 showing a state in which the housing portion 31A housing the fuel pump 31 is supported in the reservoir cup 32 by the elastic support member 20, and other components are omitted. A support lid 32A for covering at least a part of the opening is fixed to the opening at the upper end of the storage cup 32. One end of the elastic support member 20 is connected to the support cover portion 32A, and the other end of the elastic support member 20 is connected to the housing portion 31A. For example, the support cover 32A, the elastic support member 20, and the housing 31A are integrally molded with an elastic body such as resin.

In order to properly support the housing portion 31A in the reservoir cup 32, two or more elastic support members are required. Therefore, the detailed description of the present embodiment is a description of a configuration in which the number of the elastic support members 20 is, for example, 3. In the configuration of the present embodiment, as shown in fig. 4, the 3 elastic support members 20 are arranged at appropriate intervals (substantially equal intervals in the example of fig. 4) at which the reservoir cups 32 can be supported centering on the housing axis 31J, which is the axis of the housing portion 31A. The support cover connection portion 20F, which is one end of the elastic support member 20, is connected (fixed) to the inner surface of the storage cup 32 that supports the cover portion 32A. The other end of the elastic support member 20, i.e., the case connection portion 20B, is connected (fixed) to a side surface of the case portion 31A. The vibration of the housing portion 31A with respect to the reservoir cup 32 includes a vibration in the housing radial direction (radial vibration) perpendicular to the housing axis 31J and a vibration in the housing circumferential direction (circumferential vibration) around the housing axis 31J. As described below, the elastic support member 20 appropriately absorbs radial vibration and circumferential vibration with a very simple configuration.

● detailed construction of elastic support Member (FIGS. 5 to 7)

As shown in fig. 5, the elastic support member 20 includes a radial support member 20A (see fig. 6) for absorbing vibration in the radial direction (X direction shown) and a circumferential support member 20E (see fig. 7) for absorbing vibration in the circumferential direction (Y direction shown). The elastic support member 20 is integrally formed so as to be connected by a radial member coupling portion 20C which is a coupling portion of the radial support member 20A and a circumferential member coupling portion 20G which is a coupling portion of the circumferential support member 20E, and so as to sandwich the radial vibration absorbing portion 20D between the circumferential vibration absorbing portions 20H and provide a circumferential movement limiting interval 23.

As shown in fig. 6, the radial support member 20A is constituted by a radial vibration absorbing portion 20D, a case connecting portion 20B, and a radial member coupling portion 20C. The radial support member 20A is formed of a plate-shaped elastic member having a 1 st plate width 21B in the housing circumferential direction (the illustrated Y direction), and a 1 st plate thickness 21A thinner than the 1 st plate width 21B in a direction orthogonal to the 1 st plate width 21B. The radial vibration absorbing portion 20D is formed in an inverted U shape so as to be bent in the plate thickness direction, and the height thereof is set to the 1 st plate length 21C. The plate thickness direction of the portion of the radial vibration absorbing portion 20D formed in the inverted U-letter shape other than the bent portion of the U-letter shape is set as the case radial direction. This allows the radial vibration absorbing portion 20D of the radial support member 20A to be easily elastically deformed in the housing radial direction (the X direction in the figure) to absorb vibration in the housing radial direction. Further, since the rigidity of the radial support member 20A does not need to be considered to absorb vibration in the casing circumferential direction, but only needs to be considered to absorb vibration in the casing radial direction, the dimension of the 1 st plate width 21B can be set relatively freely as compared with a conventional elastic support member that absorbs vibration in both the casing radial direction and the casing circumferential direction, and thus the rigidity can be easily ensured. Further, since only the absorption of the vibration in the housing radial direction is considered, the shape of the radial support member 20A is a very simple shape.

A housing connecting portion 20B protruding in the housing radial direction is provided at one end of the radial support member 20A. The case connection portion 20B has a connection surface with the case portion 31A having a 1 st plate width 21B and a case connection portion height 21H, and the case connection portion height 21H is set to be larger than the 1 st plate thickness 21A, for example. Further, a radial member coupling portion 20C for coupling with the circumferential member coupling portion 20G of the circumferential support member 20E is provided at the other end portion of the radial support member 20A. As shown in fig. 3 and 4, the case connection portion 20B is connected to a side surface of the case portion 31A.

As shown in fig. 7, the circumferential support member 20E is composed of a circumferential vibration absorbing portion 20H, a support cover connection portion 20F, and a circumferential member coupling portion 20G. The circumferential support member 20E is formed of a plate-shaped elastic member having a 2 nd plate width 22B in the casing radial direction (X direction in the drawing), and a 2 nd plate thickness 22A thinner than the 2 nd plate width 22B in a direction orthogonal to the 2 nd plate width 22B. The circumferential support member 20E having the circumferential vibration absorbing portion 20H is formed in a shape of japanese katakana "コ" so as to be bent in the plate thickness direction, and the height thereof is set to the 2 nd plate length 22C. The thickness direction of the circumferential vibration absorbing portion 20H is the housing circumferential direction. This allows the circumferential vibration absorbing portion 20H of the circumferential support member 20E to be easily elastically deformed in the housing circumferential direction (the illustrated Y direction) and to absorb the vibration in the housing circumferential direction. Further, since the rigidity of the circumferential support member 20E does not need to be considered to absorb vibration in the casing radial direction, but only needs to be considered to absorb vibration in the casing circumferential direction, the dimension of the 2 nd plate width 22B can be set relatively freely as compared with a conventional elastic support member that absorbs vibration in both the casing radial direction and the casing circumferential direction, and thus the rigidity can be easily ensured. Further, since only the absorption of the vibration in the housing circumferential direction is considered, the shape of the circumferential support member 20E is a very simple shape.

A support cover connection portion 20F connected to the support cover portion 32A is provided at one end (upper end) of the circumferential support member 20E. The connection surface of the support cover connection portion 20F to the support cover portion 32A is a surface having the 2 nd plate width 22B and the 2 nd plate thickness 22A. Further, a circumferential member coupling portion 20G for coupling with the radial member coupling portion 20C of the radial support member 20A is provided at the other end portion (lower end portion) of the circumferential support member 20E. As shown in fig. 3 and 4, the support cover connection portion 20F is connected to the bottom surface (back surface) of the support cover portion 32A.

● [ construction of front surface (FIG. 8) and side surface (FIG. 9) of elastic support Member ]

As shown in fig. 8, since the 2 nd plate thickness 22A in the case circumferential direction (the illustrated Y direction) of the elastic support member 20 is smaller than the 2 nd plate width 22B in the case radial direction (the illustrated X direction) (see fig. 9), the two circumferential vibration absorbing portions 20H can be elastically deformed in the case circumferential direction. Therefore, the elastic support member 20 can efficiently absorb the vibration in the housing circumferential direction by the circumferential vibration absorbing portion 20H. As described later, the circumferential movement restriction interval 23 is provided to restrict excessive movement of the housing portion 31A caused by circumferential vibration (see fig. 11).

As shown in fig. 9, since the 1 st plate thickness 21A in the housing radial direction (X direction in the drawing) of the elastic support member 20 is smaller than the 1 st plate width 21B in the housing circumferential direction (Y direction in the drawing) (see fig. 8), the inverted U-shaped radial vibration absorbing portion 20D can be elastically deformed in the housing radial direction. Therefore, the elastic support member 20 can efficiently absorb the vibration in the housing radial direction by the radial vibration absorbing portion 20D. As described later, the radial movement restriction interval 24 is provided to restrict excessive movement of the housing portion 31A caused by radial vibration (see fig. 10).

● [ restriction of movement of elastic support member in radial direction (FIG. 10) and circumferential direction (FIG. 11) ]

As shown in fig. 10, the radial movement restriction interval 24 is an interval provided in the radial direction between the housing connection portion 20B and the circumferential member coupling portion 20G. Since the housing portion 31A can move in the radial direction until the housing connection portion 20B interferes with the circumferential member coupling portion 20G, the elastic support member 20 can restrict the movement of the housing portion 31A in the radial direction within the radial movement restriction interval 24.

The circumferential movement restriction interval 23 is an interval in the circumferential direction provided on both sides of the radial vibration absorbing portion 20D of the elastic support member 20, and is an interval provided in the circumferential direction between the radial vibration absorbing portion 20D and the circumferential vibration absorbing portion 20H. Since the case portion 31A can move in the circumferential direction until the radial vibration absorbing portion 20D interferes with the circumferential vibration absorbing portion 20H, the elastic support member 20 can restrict the movement of the case portion 31A in the circumferential direction within the circumferential movement restriction interval 23.

● [ embodiment of supporting structure of plural elastic supporting members facing each other (FIGS. 12 and 13) ]

The embodiment shown in fig. 12 shows an example in which two elastic support members 20 are disposed so as to face each other in the Y direction with respect to the axis of the housing portion 31A (housing axis 31J). In this arrangement, since the radial vibration absorbing portions 20D of the two elastic support members 20 arranged to face each other operate with respect to the Y-direction vibration of the case portion 31A, the support structure of the elastic support members 20 arranged to face each other can absorb the Y-direction vibration more efficiently than a case where the elastic support members are not arranged to face each other. Further, since the circumferential vibration absorbing portions 20H of the two elastic support members 20 operate in the X direction, the support structure of the elastic support members 20 arranged in opposition can absorb vibration in the X direction more efficiently than when they are not arranged in opposition. Further, the circumferential vibration absorbing portions 20H of the two elastic support members 20 absorb the vibration in the housing circumferential direction with respect to the vibration in the housing circumferential direction performed by the housing axis 31J.

The embodiment shown in fig. 13 shows an example in which 4 (2 pairs) of elastic support members 20 are arranged at intervals of 90 degrees with respect to the housing axis 31J. Since the two elastic support members 20 are disposed facing each other in the same manner as in fig. 12 for 1 pair of elastic support members 20 disposed in the Y direction, the vibration in the X direction is efficiently absorbed by the circumferential vibration absorbing portion 20H, and the vibration in the Y direction is efficiently absorbed by the radial vibration absorbing portion 20D. Further, since the 1 pair of elastic support members 20 arranged in the X direction are arranged so as to be orthogonal to the arrangement of fig. 12, the vibration in the X direction is efficiently absorbed by the radial vibration absorbing portion 20D, and the vibration in the Y direction is efficiently absorbed by the circumferential vibration absorbing portion 20H. Therefore, compared to the support structure of 1 pair of elastic support members 20 (fig. 12), the X-direction vibration and the Y-direction vibration can be efficiently absorbed. Further, the circumferential vibration absorbing portions 20H of the 4 elastic support members 20 absorb the vibration in the housing circumferential direction with respect to the vibration in the housing circumferential direction performed by the housing axis 31J.

The support structure of the elastic support member 20 can efficiently absorb not only the vibration in the radial direction and the circumferential direction with respect to the housing axis 31J but also the vibration in the parallel direction (the vibration in the XY plane) of the housing portion 31A (the fuel pump 31) as described above.

● [ Effect of the present application ]

As described above, by using the elastic support member 20 of the present invention as a support member that supports the housing portion 31A for housing the fuel pump 31 to the support lid portion 32A, not only radial vibration but also circumferential vibration can be efficiently absorbed. Further, since the absorption of the vibration in the casing radial direction and the absorption of the vibration in the casing circumferential direction are performed by different members (the radial vibration absorbing portion and the circumferential vibration absorbing portion), it is easy to secure the rigidity (the plate width can be set relatively freely) as compared with the conventional support member in which the absorption of the vibration in the casing radial direction and the absorption of the vibration in the casing circumferential direction are performed by the same member. Further, since the absorption of the vibration in the housing radial direction and the absorption of the vibration in the housing circumferential direction are performed by different members, the shapes of the respective members (the radial vibration absorbing portion and the circumferential vibration absorbing portion) can be made very simple.

The fuel supply device of the present invention is not limited to the configuration, structure, and the like described in the present embodiment, and various modifications, additions, and deletions can be made without departing from the scope of the present invention. In particular, the shapes of the circumferential vibration absorbing portion 20H and the radial vibration absorbing portion 20D constituting the elastic support member 20 are not limited to those shown in the present embodiment, and may be any shapes that can appropriately absorb vibrations in various directions.

The fuel supply device described in the present embodiment is not limited to the fuel supply device shown in fig. 1, and can be applied to various vehicles having an internal combustion engine. In addition, at least one of the plurality of elastic support members may be an embodiment of the elastic support member 20 of the present invention.

Claims

1. A fuel supply device comprising a fuel pump, a cylindrical housing portion accommodating the fuel pump, a reservoir cup accommodating the housing portion, and two or more elastic support members for elastically supporting the housing portion on the inner side of the reservoir cup,

at least 1 of the plurality of elastic support members comprises:

a radial support member formed of a plate-shaped elastic member, having a 1 st plate width in a housing circumferential direction around a housing axis which is an axis of the housing portion, and having a 1 st plate thickness thinner than the 1 st plate width in a direction orthogonal to the 1 st plate width, the radial support member having a radial vibration absorbing portion capable of absorbing vibration of the housing portion with respect to the reservoir cup and vibration in a housing radial direction orthogonal to the housing axis; and

a circumferential support member formed of a plate-shaped elastic member having a 2 nd plate width in the housing radial direction and a 2 nd plate thickness thinner than the 2 nd plate width in a direction orthogonal to the 2 nd plate width, the circumferential support member having a circumferential vibration absorbing portion capable of absorbing vibration of the housing portion with respect to the reservoir cup and vibration in the housing circumferential direction,

a part of the radial support member and a part of the circumferential support member are integrally coupled by a coupling portion.

2. The fuel supply apparatus according to claim 1,

the circumferential vibration absorbing portion is disposed on both sides of the radial vibration absorbing portion so as to sandwich at least a part of the radial vibration absorbing portion from the housing in a circumferential direction,

and is disposed at a position spaced apart by a predetermined distance in the housing circumferential direction with respect to at least a part of the radial vibration absorbing portion sandwiched from the housing circumferential direction.