Fuel supply device

Abstract

To suppress relative rotation of a pump unit to a flange unit in a fuel supply device in which the flange unit and the pump unit are coupled to each other by an extension / contraction coupling unit.SOLUTION: An extension / contraction coupling unit 50 for coupling a flange unit 10 and a pump unit 30 to each other includes a housing member 60 and a joint member 80 fitted into the housing member 60 so as to be slidable in the axial direction. Positioning projection parts 69, 70, 71 are provided in an inner peripheral part of the housing member 60. Positioning grooves 88, 89, 90 fitted to the positioning projection parts 69, 70, 71 are provided in an outer peripheral part of the joint member 80.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a fuel supply device. [Background technology]

[0002] Conventionally, vehicles such as automobiles that run on liquid fuel such as gasoline are equipped with a fuel supply device that supplies fuel from a fuel tank to an internal combustion engine. Patent Document 1 discloses such a fuel supply device, which includes a cover member that closes an opening formed in the top wall of the fuel tank, a pump unit placed on the bottom wall of the fuel tank, and a telescopic connection unit that connects the cover member and the pump unit. The telescopic connection unit is configured to be telescopic by fitting a cylindrical member connected to the cover member and a support member connected to the pump unit together so that they can move relative to each other in the axial direction.

[0003] Furthermore, in the evaporated fuel treatment device of Patent Document 1, the cylindrical member and the support member are formed of resins with different melting points in order to suppress abnormal noise caused by stick-slip when the telescopic connection unit extends and retracts. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-63673 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in conventional fuel supply devices, the rotation of the tubular member and the support member of the telescopic connection unit was not sufficiently restricted. Therefore, when the tubular member and the support member rotate relative to each other, the pump unit rotates relative to the lid member fixed to the top wall of the fuel tank, causing rattle of the pump unit. This causes the float of the sender gauge fixed to the pump unit to swing, resulting in a decrease in the measurement accuracy of the sender gauge. In particular, as in Patent Document 1, when the tubular member and the support member are made of different resins, the dimensional changes of the members differ when the resin swells due to fuel, which can lead to greater rattle of the pump unit.

[0006] The technology disclosed in this specification aims to provide a fuel supply device that can suppress relative rotation of a pump unit with respect to a cover member. [Means for solving the problem]

[0007] A first aspect of the present disclosure is a fuel supply device comprising: a cover member fixed to an upper wall of a fuel tank so as to close an opening formed in the upper wall; a pump unit placed on a bottom wall of the fuel tank; a cylindrical member connected to one of the cover member and the pump unit; and a support member connected to the other of the cover member and the pump unit and fitted within the cylindrical member so as to be axially slidable, wherein a protrusion is provided on an inner peripheral portion of the cylindrical member, and a groove portion is provided on an outer peripheral portion of the support member that fits into the protrusion and regulates relative rotation between the cylindrical member and the support member.

[0008] According to the first aspect, the protrusions on the support member and the grooves on the tubular member fit together to restrict rotation of the support member within the tubular member, thereby suppressing relative rotation between the cover member connected to the support member and the pump unit connected to the tubular member.

[0009] In a second aspect of the present disclosure, two or more sets of the protrusions and the grooves are provided, and the protrusions protrude in different directions in a plane perpendicular to the axial direction of the tubular member. According to the second aspect, the protrusions protruding in different directions fit into the grooves, thereby effectively suppressing relative rotation between the support member and the tubular member, and ultimately relative rotation of the pump unit with respect to the cover member.

[0010] In a third aspect of the present disclosure, the protrusion is a ridge extending from the upper end to the lower end of the inner periphery of the tubular member along the axial direction of the tubular member. According to the third aspect, the length of the protrusion that fits into the groove in the axial direction is increased, thereby preventing the support member from tilting relative to the tubular member. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing a fuel supply device according to an embodiment; [Figure 2] FIG. 2 is a diagram showing a state in which the fuel supply device is attached to a fuel tank. [Figure 3] FIG. 10 is a view showing a state in which the fuel supply device is being attached to the fuel tank. [Figure 4] FIG. 2 is an exploded perspective view of the fuel supply device, in which some components are omitted. [Figure 5] FIG. [Figure 6] 3 is a cross-sectional view of the housing part shown in FIG. 2 taken along the line AA. [Figure 7] FIG. [Figure 8] 3 is a cross-sectional view of the joint member shown in FIG. 2 taken along the line AA. [Figure 9] 3 is a cross-sectional view of the expansion / contraction connection unit shown in FIG. 2 taken along line AA. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Embodiment 1> A fuel supply device according to an embodiment of the present invention is attached to a fuel tank of a vehicle and supplies fuel from the fuel tank to an internal combustion engine of the vehicle.

[0013] (Fuel Tank 2) First, the fuel tank 2 to which the fuel supply device 1 is attached will be described. As shown in FIG. 2, the fuel tank 2 is a hollow container having a top wall 3 and a bottom wall 4. A circular opening 5 is formed in the top wall 3. The fuel tank 2 is mounted on the vehicle so that the top wall 3 and the bottom wall 4 are horizontal. The fuel tank 2 is made of resin, and deforms (mainly expands and contracts in the vertical direction) due to changes in the internal pressure of the tank. The fuel tank 2 stores gasoline, for example, as a liquid fuel.

[0014] (Fuel supply device 1) 1 and 2, the fuel supply device 1 includes a flange unit 10, a pump unit 30, and a telescopic connection unit 50. As shown in FIG. 2, the flange unit 10 is fixed to the upper wall 3 so as to close the opening 5. The pump unit 30 is installed inside the fuel tank 2, more specifically, on the bottom wall 4 of the fuel tank 2. The telescopic connection unit 50 connects the flange unit 10 and the pump unit 30. In this embodiment, the flange unit 10, the pump unit 30, and the telescopic connection unit 50 are each configured as separate entities.

[0015] (Flange unit 10) The flange unit 10 includes a flange body 11 and an evaporated fuel valve 12. In this specification, the flange unit 10 is also referred to as a "lid member."

[0016] (Flange body 11) The flange body 11 is mainly formed of a circular plate-shaped cover plate portion 13. The flange body 11 is made of polyacetal (POM). As shown in FIG. 2, an annular fitting cylindrical portion 14 is concentrically formed on the underside of the cover plate portion 13. An annular plate-shaped flange portion 15 is formed on the outer periphery of the cover plate portion 13 and protrudes radially outward beyond the fitting cylindrical portion 14. A cylindrical valve accommodating portion 16 with a top is formed in the cover plate portion 13 so as to protrude upward. An evaporation port 17 protruding radially outward is formed at the upper end of the valve accommodating portion 16.

[0017] As shown in Fig. 1, the cover plate 13 is provided with a fuel discharge port 18, a first electrical connector 19, and a second electrical connector 20. The fuel discharge port 18 is formed in the shape of a straight pipe that penetrates the cover plate 13 in the vertical direction. A predetermined number of metal terminals are disposed inside both electrical connectors 19, 20. The fuel discharge port 18 and both electrical connectors 19, 20 are disposed behind the valve accommodating portion 16.

[0018] (Vapor fuel valve 12) As shown in Figure 2, the evaporative fuel valve 12 is attached with its upper portion housed within the valve housing portion 16 of the flange body 11. For example, an integrated valve equipped with an evaporative fuel control valve and a full tank limiting valve is used as the evaporative fuel valve 12. The evaporative fuel control valve closes when the internal pressure of the fuel tank 2 is lower than a predetermined value and opens when the internal pressure exceeds the predetermined value. The full tank limiting valve opens when the fuel tank 2 is not full of fuel and closes when it is full.

[0019] (Pump unit 30) 1 and 2, the pump unit 30 includes a sub-tank 31, a sender gauge 40, and a fuel pump 46. The pump unit 30 is mounted on the bottom wall 4 of the fuel tank 2, and pumps the fuel in the fuel tank 2 out of the fuel tank 2.

[0020] (Subtank 31) The sub-tank 31 has a sub-tank body 32, a cover member 33, and a fuel filter .

[0021] The subtank body 32 is made of resin and is formed in the shape of an inverted shallow box with an open bottom. As shown in Fig. 1, the subtank body 32 is formed in the shape of an elongated rectangle with its left-right length increased. A rectangular inlet hole 35 is formed in the upper surface of the subtank body 32 at a position near the right.

[0022] As shown in Fig. 2, an engagement shaft 36 that protrudes forward is formed at a position toward the left of the lower front surface of the subtank body 32. In addition, as shown in Fig. 1, a plate-shaped upright wall portion 37 that faces in the front-rear direction is provided at the front right portion of the upper surface of the subtank body 32.

[0023] The cover member 33 is made of resin and is formed in a generally rectangular plate shape. The outer edge of the cover member 33 is fixed to the outer edge of the subtank body 32. As shown in FIG. 2, the cover member 33 has a plurality of through holes 38 that penetrate through the thickness direction. The bottom surface of the cover member 33 has a plurality of support portions 39 that protrude downward. Each support portion 39 abuts against the bottom wall 4 of the fuel tank 2 from above, thereby ensuring a gap between the cover member 33 and the bottom wall 4. Fuel near the bottom of the fuel tank 2 flows into the subtank 31 through this gap and the through holes 38.

[0024] A fuel filter 34 is disposed between the cover member 33 and the subtank body 32. The fuel filter 34 has a flat, bag-shaped filter member and serves to filter the fuel. The filter member is made of a material that exhibits filtering function, such as porous resin, woven fabric, nonwoven fabric, resin mesh, or metal mesh. A fuel storage space (not shown) is formed by the fuel filter 34 and the subtank body 32, and fuel that flows into the subtank body 32 through the inlet hole 35 is stored in the fuel storage space.

[0025] (Sender Gauge 40) The sender gauge 40 includes a gauge body 41, an arm 42, and a float 43. The gauge body 41 is attached to the vertical wall portion 37 of the sub-tank 31. The base end of the arm 42 is attached to a rotating portion 44 that is rotatably provided on the gauge body 41 about a horizontal axis. The float 43 is attached to the free end of the arm 42. The sender gauge 40 detects the remaining amount of fuel in the fuel tank 2 by utilizing the angle of the arm 42 that is connected to the float 43 that floats on the surface of the fuel in the fuel tank 2. The sender gauge 40 is electrically connected to the first electrical connector portion 19 via a first wire harness 45 (see FIG. 1).

[0026] (Fuel pump 46) 1 and 2, fuel pump 46 is a generally cylindrical electric fuel pump that discharges fuel from fuel tank 2 and sub-tank 31 to fuel discharge port 18 via fuel supply pipe 47. Fuel supply pipe 47 is made of a flexible resin hose or the like. Fuel pump 46 is electrically connected to second electrical connector 20 via second wire harness 48.

[0027] (Extendable connection unit 50) As shown in Figure 1, the telescopic connection unit 50 connects the flange unit 10 and the pump unit 30. The telescopic connection unit 50 includes a housing member 60, a joint member 80, and a spring 100 (see Figure 4). In this specification, the housing member 60 and the joint member 80 are also referred to as the "cylindrical member" and the "support member," respectively.

[0028] (housing member 60) The housing member 60 is made of polyacetal and has a cylindrical shape with a top. As shown in FIG.

[0029] The housing body 61 is generally rectangular tubular, with an opening 63 at its lower end. The housing body 61 has a generally U-shaped joint engagement portion 64 near the lower right end of its rear surface. The joint engagement portion 64 has an engagement piece 65 that protrudes from the inner surface of its lower portion toward the inside of the housing body 61.

[0030] The housing body 61 is provided with a rod-shaped spring guide 66 that extends from the upper surface to near the lower end inside the housing body 61. As shown in Fig. 6, the spring guide 66 is provided in approximately the center inside the housing body 61, and has a cross-sectional shape with three protrusions arranged at equal intervals in the circumferential direction.

[0031] 5, the locking portion 62 is formed to extend horizontally from near the upper end of the housing main body 61 around the periphery of the housing main body 61. The locking portion 62 is provided with two locking holes 67 that penetrate in the vertical direction. The portion of the housing main body 61 that protrudes above the locking portion 62 is called a protruding portion 68.

[0032] The housing member 60 is fixed to the flange unit 10 by fitting the locking holes 67 and protrusions 68 of the housing member 60 into the locking projections 21 (see FIG. 4) and recesses (not shown) formed on the underside of the cover plate portion 13, respectively. Because the housing member 60 and the flange unit 10 are made of the same resin material, polyacetal in this embodiment, they are more easily fixed to each other and can be firmly connected compared to when they are made of different resin materials.

[0033] (Joint member 80) As shown in Fig. 7, the joint member 80 has a joint plate 81 and a support pillar 82. The joint plate 81 is made of glass fiber reinforced polyamide (PA6-GF30) and is a thick plate that is flat in the front-to-rear direction. The joint plate 81 has a substantially flat upper end surface 81a. The support pillar 82 extends upward from the center of the upper end surface 81a of the joint plate 81.

[0034] An engagement shaft hole 83 penetrating in the front-rear direction is formed in the lower part of the joint plate part 81. In addition, an engagement part 84 for engaging with the pump unit 30 is formed on the rear surface of the joint plate part 81. As shown in FIG. 2, the engagement shaft 36 of the subtank body 32 is rotatably engaged with the engagement shaft hole 83 of the joint plate part 81. In addition, the engagement part 84 of the joint member 80 is engaged with a rotation groove (not shown) formed in an arc shape on the subtank body 32. In this way, the joint member 80 is connected to the pump unit 30 so as to be rotatable around the engagement shaft 36.

[0035] As shown in Figure 7, the center of support pillar 82 is formed into a cylindrical shape with an opening 85 at the upper end. A spring 100 made of a metal coil spring is housed inside support pillar 82 (see Figure 9). As a result, the inner peripheral surface of support pillar 82 guides the expansion and contraction of spring 100. A concave restriction groove 86 extending in the vertical direction is provided on the right side of the rear of support pillar 82. A stop rib 87 extending horizontally so as to fill the recess of restriction groove 86 is provided near the upper end of restriction groove 86.

[0036] (Assembly of the telescopic connection unit 50) As shown in FIG. 4, the spring 100 is inserted into the support post 82 through the opening 85 of the joint member 80. In this state, the support post 82 of the joint member 80, together with the spring 100, is slidably fitted into the housing main body 61 through the opening 63 of the housing member 60. At this time, the spring guide 66 formed in the housing main body 61 is inserted into the spring 100 (see FIG. 9). In addition, the engagement piece 65 of the housing member 60 rides over the retaining rib 87 of the joint member 80 and fits into the restriction groove 86. As a result, the housing member 60 and the joint member 80 are connected to each other. In this state, the housing member 60 and the joint member 80 are biased in the separation direction by the elasticity of the spring 100. As the joint member 80 slides upward, the area of ​​the support post 82 housed in the housing main body 61 increases, and the axial length (height) of the entire telescopic connection unit 50 decreases. In this way, the longitudinal length of the telescopic connection unit 50 becomes extendible and retractable.

[0037] (Installation of fuel supply device 1) 2 and 3, a method for attaching the fuel supply device 1 to the fuel tank 2 will be described. The flange unit 10, the expansion / contraction connection unit 50, and the pump unit 30 are connected together in advance to assemble the fuel supply device 1.

[0038] First, the fuel supply device is placed in an extended state as shown in Fig. 3. In this state, the joint member 80 is suspended from the housing member 60 connected to the flange unit 10, and the pump unit 30 is suspended from the joint member 80. That is, the joint member 80 is lowered to the lowest position (furthest position) relative to the housing member 60. In addition, the pump unit 30 is rotated so as to be inclined downward to the right relative to the joint member 80.

[0039] Next, with the fuel supply device 1 in the extended state, the pump unit 30 is inserted from above into the opening 5 of the fuel tank 2. The pump unit 30 is rotated in the opposite direction to when it was suspended relative to the joint member 80, so that it is placed in a horizontal position, and is placed on the bottom wall 4 of the fuel tank 2 (see FIG. 2).

[0040] Next, flange unit 10 is pushed down against the biasing force of spring 100, whereby fitting cylindrical portion 14 of flange main body 11 is fitted into opening 5 of fuel tank 2. In this state, flange portion 15 of flange main body 11 is fixed to upper wall 3 of fuel tank 2 via fixing means (not shown), such as fixing brackets or bolts (see FIG. 2). In this manner, installation of fuel supply device 1 on fuel tank 2 is completed.

[0041] When the fuel supply device 1 is installed (see FIG. 2 ), the pump unit 30 is held pressed against the bottom wall 4 of the fuel tank 2 by the biasing force of the spring 100. The fuel tank 2 deforms, i.e., expands and contracts, due to changes in the tank internal pressure caused by changes in temperature, the amount of fuel, and the like. Accordingly, the distance between the top wall 3 and the bottom wall 4 of the fuel tank 2 changes (increases or decreases). In this case, the housing member 60 and the joint member 80 move vertically relative to each other to follow the change in the height of the fuel tank 2.

[0042] Although not shown, when the fuel tank 2 attempts to contract excessively, the lower end of the housing main body 61 abuts against the upper end surface 81a of the joint member 80, thereby acting as a tension rod. This limits the distance between the flange unit 10 and the pump unit 30 to a minimum. Furthermore, when the fuel tank 2 attempts to expand excessively, the engaging piece 65 of the housing main body 61 abuts against the retaining rib 87 from below. This prevents the flange unit 10 and the pump unit 30 from separating any further, limiting the distance between them to a maximum.

[0043] (Operation of fuel supply device 1) The fuel pump 46 is driven by external driving power. Then, the fuel in the fuel tank 2 and / or the fuel in the fuel storage space of the sub-tank 31 is drawn into the fuel pump 46 via the fuel filter 34 and pressurized. The pressurized fuel is supplied to the engine from the fuel discharge port 18 of the flange unit 10 via the fuel supply pipe 47.

[0044] (Characteristic configuration of the telescopic connection unit 50) As shown in FIG. 6 , the inner periphery of the housing body 61 of the housing member 60 is provided with a first positioning protrusion 69, a second positioning protrusion 70, and a third positioning protrusion 71, which protrude in different directions. Each of the positioning protrusions 69, 70, and 71 is a protrusion extending from the upper end to the lower end of the inner periphery of the housing body 61. Furthermore, in a plane perpendicular to the axial direction of the housing body 61, each of the positioning protrusions 69, 70, and 71 has a substantially rectangular cross section with the long side extending in the direction of protrusion. In this plane, the first positioning protrusion 69 protrudes leftward from the center of the right surface of the inner periphery of the housing body 61. The second positioning protrusion 70 protrudes rearward from near the left end of the front surface of the inner periphery of the housing body 61. The third positioning protrusion 71 protrudes forward from near the left end of the rear surface of the inner periphery of the housing body 61, i.e., toward the second positioning protrusion 70. That is, the second positioning protrusion and the third positioning protrusion protrude in directions opposite to each other in the cross section of the housing main body 61. Furthermore, the first positioning protrusion 69 protrudes in a direction approximately perpendicular to the directions in which the second positioning protrusion 70 and the third positioning protrusion 71 protrude. Note that in this specification, the positioning protrusions 69, 70, and 71 are also referred to as "protrusions."

[0045] As shown in FIG. 8 , a first positioning groove 88, a second positioning groove 89, and a third positioning groove 90 are provided on the outer periphery of the support portion 82 of the joint member 80. Each of the positioning grooves 88, 89, and 90 extends from the upper end to the lower end of the outer periphery of the support portion 82. In a plane perpendicular to the axial direction of the support portion 82, each of the positioning grooves 88, 89, and 90 has a substantially rectangular cross section with the width direction as the short side. In the same cross section, the first positioning groove 88 is recessed leftward from the center of the right surface of the outer periphery of the support portion 82. The second positioning groove 89 is recessed rearward from near the left end of the front surface of the outer periphery of the support portion 82. The third positioning groove 90 is recessed forward from near the left end of the rear surface of the outer periphery of the support portion 82. Note that in this specification, the positioning grooves 88, 89, and 90 are also referred to as "groove portions."

[0046] 9, the width of each positioning groove 88, 89, 90 is set slightly larger than the thickness (width) of the corresponding positioning protrusion 69, 70, 71. More specifically, the housing member 60 and the joint member 80, which are made of resin, swell when immersed in the fuel in the fuel tank 2. The polyacetal material used for the housing member 60 and the glass fiber reinforced polyamide material used for the joint member 80 have different swelling ratios (ratios of the volume swollen by fuel to the original volume). Therefore, the housing member 60 and the joint member 80 are designed so that when the housing member 60 and the joint member 80 change dimensions due to swelling, the widthwise gaps between the positioning protrusions 69, 70, 71 and the positioning grooves 88, 89, 90 fall within a predetermined range. As a result, when the fuel supply device 1 is immersed in fuel, the first positioning protrusion 69 fits into the first positioning groove 88, the second positioning protrusion 70 fits into the second positioning groove 89, and the third positioning protrusion 71 fits into the third positioning groove 90 with almost no gaps.

[0047] The distance that the support post 82 can move within the housing main body 61 in the direction in which the first positioning protrusion 69 protrudes, i.e., in the left-right direction, is set to be shorter than the length over which the first positioning protrusion 69 fits into the first positioning groove 88. The same applies to the second positioning protrusion 70 and the third positioning protrusion 71.

[0048] (Advantages of embodiment 1) According to the fuel supply device 1 of this embodiment, the relative rotation between the housing member 60 connected to the flange unit 10 and the joint member 80 connected to the pump unit 30 can be restricted by the engagement between the positioning protrusions 69, 70, 71 and the positioning grooves 88, 89, 90. This makes it possible to prevent the pump unit 30 from rotating relative to the flange unit 10 attached to the fuel tank 2.

[0049] Furthermore, the positioning protrusions 69, 70, and 71 of the housing member 60 protrude in different directions. This effectively prevents relative rotation between the housing member 60 and the joint member 80, and therefore effectively prevents relative rotation of the pump unit 30 with respect to the flange unit 10. This prevents the float 43 of the sender gauge 40 from swinging, improving the measurement accuracy of the sender gauge 40.

[0050] Furthermore, the distance that the support post 82 can move within the housing main body 61 in the direction in which each positioning protrusion 69, 70, 71 protrudes is set shorter than the length over which each positioning protrusion 69, 70, 71 fits into the corresponding positioning groove 88, 89, 90. This makes it possible to prevent the positioning protrusions 69, 70, 71 from coming off the corresponding positioning groove 88, 89, 90 when the support post 82 moves horizontally within the housing main body 61.

[0051] Furthermore, each of the positioning protrusions 69, 70, 71 is a protrusion that extends from the upper end to the lower end of the inner periphery of the housing main body 61 along the axial direction of the housing member 60. Therefore, the length over which the positioning protrusions 69, 70, 71 and the positioning grooves 88, 89, 90 fit together in the axial direction is increased, thereby preventing the joint member 80 from tilting relative to the housing member 60.

[0052] Furthermore, the housing member 60 and the joint member 80 are designed so that when the fuel supply device 1 is immersed in fuel, the widthwise gap between the positioning protrusions 69, 70, 71 and the positioning grooves 88, 89, 90 is within a predetermined range. This prevents the housing member 60 and the joint member 80 from adhering to each other even if they swell and change in size, and also prevents a significant decrease in the effect of the positioning protrusions 69, 70, 71 and the positioning grooves 88, 89, 90 in inhibiting relative rotation.

[0053] In addition, the housing member 60 and the joint member 80 are made of different resins. This prevents noise from being generated by friction when the housing member 60 and the joint member 80 slide against each other. Furthermore, compared to when the housing member 60 and the joint member 80 are made of the same resin, the housing member 60 and the joint member 80 can be prevented from adhering to each other.

[0054] (Other embodiments) The technology of the present disclosure is not limited to the above-described embodiment, and modifications are possible within the scope of the intent and spirit of the present disclosure. For example, the technology of the present disclosure is not limited to the fuel supply device 1 of a vehicle, and may be applied to other fuel supply devices, such as those of a ship. Furthermore, the telescopic connection unit 50 may be configured such that the joint member 80 is formed in a cylindrical shape and the housing member 60 is fitted into the joint member 80.

[0055] Furthermore, at least one set of positioning protrusions 69, 70, 71 and positioning grooves 88, 89, 90 is sufficient, but two or more sets are preferable, and three or more sets are even more preferable. Furthermore, the positioning protrusions 69, 70, 71 may be provided on a portion of the housing main body 61 in the axial direction, or may be protrusions provided intermittently. Furthermore, positioning grooves may be provided on the housing member 60, and positioning protrusions may be provided on the joint member 80.

[0056] The materials for the housing member 60 and the joint member 80 may be different resins, and other resins such as polyphenylene sulfide may also be used. Since the housing member 60 is connected to and fixed to the flange unit 10, it is preferable to form them from the same resin to prevent relative movement. [Explanation of symbols]

[0057] 1 Fuel supply device 2 fuel tanks 3 Upper wall 4 Bottom wall 5 aperture 10 Flange unit (lid member) 30 Pump Unit 60 Housing member (cylindrical member) 69 First positioning protrusion (protrusion) 70 Second positioning protrusion (protrusion) 71 Third positioning protrusion (protrusion) 80 Joint member (support member) 88 First positioning groove (groove) 89 Second positioning groove (groove) 90 Third positioning groove (groove)

Claims

1. A fuel supply device, comprising: a cover member fixed to the upper wall so as to close an opening formed in the upper wall of the fuel tank; a pump unit mounted on a bottom wall of the fuel tank; a cylindrical member connected to one of the cover member and the pump unit; a support member connected to the other of the cover member and the pump unit and fitted within the cylindrical member so as to be slidable in the axial direction; Equipped with a protrusion is provided on the inner periphery of the cylindrical member, A fuel supply device, wherein a groove portion is provided on an outer periphery of the support member, the groove portion being fitted with the protrusion portion to restrict relative rotation between the cylindrical member and the support member.

2. 2. The fuel supply system according to claim 1, Two or more pairs of the protrusions and the grooves are provided, The protrusions protrude in different directions from each other on a plane perpendicular to the axial direction of the cylindrical member.

3. 3. The fuel supply device according to claim 1 or 2, The protrusion is a ridge extending from an upper end to a lower end of an inner periphery of the cylindrical member along an axial direction of the cylindrical member.

Images