JP2012219726A - Mounting structure for fuel pump and motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce overlap area of a mounting plate and a pump flange portion by preventing an increase in diameter of an opening of a fuel pump, the pump flange portion of a fuel pump and the mounting plate.SOLUTION: A mounting plate 3 to be pressed in contact with a pump flange portion 22 is comprised of an annular plate body whose contour is larger than that of the pump flange portion 22, which overlaps an outer side face of the pump flange portion 22, and includes an opening 31. In a portion of an opening edge of the opening 31, a narrow portion 32 with a recessed portion 32A formed therein, is formed. A part where the recessed portion 32A is formed, has a maximum transverse length R of the opening 31. The maximum transverse length is set in such a manner that a power supply connector 23 and a fuel connector 24 can pass through only a gap having the maximum transverse length. Bolt insertion ports 33A-33E are disposed along a circumferential direction. The distance P1 between the bolt insertion ports 33A and 33E neighboring across the recessed portion 32A is set shorter than the distance P2 between neighboring bolt insertion ports with no recessed portion 32A interposed therebetween.

Description

  The present invention relates to a fuel pump mounting structure and a motorcycle, and more particularly to a fuel pump mounting structure for mounting on a fuel tank of a scooter type motorcycle or the like.

  Some scooter type motorcycles are provided with an article storage box below a seating seat. In such a scooter type motorcycle, the fuel tank is often arranged behind the article storage box or below the step board. In the case where fuel is supplied from the fuel tank of such a scooter type motorcycle to the internal combustion engine side using a fuel pump, it is desirable in terms of layout that the fuel pump is provided inside the fuel tank and unitized with the fuel tank.

  As a structure for attaching the fuel pump to the fuel tank, a gasket is interposed between the outer surface around the opening of the fuel tank (tank seal surface) and the flange of the fuel pump. A structure is known in which a ring-shaped attachment plate is fastened to a fuel tank with a fastener such as a screw (for example, see Patent Document 1). In such a fuel pump mounting structure, a plurality of connecting members that penetrate through the center of the flange portion and communicate with the fuel pump are provided so as to protrude outward. The plurality of connecting members are arranged to extend in different directions so as not to interfere with each other. The attachment plate has a ring shape in which a circular opening is formed at the center in order to pass through the connecting members extending in different directions.

JP-A-9-242636

  The two connecting members that protrude outward from the flange portion and extend in different directions toward the peripheral edge of the flange portion require a connection allowance for coupling with, for example, a fuel hose arranged toward the internal combustion engine side. Therefore, a predetermined length is required in the extending direction. For this reason, the opening of the mounting plate needs to have a diameter that can pass through both of the connecting members, and the outer diameter of the mounting plate is inevitably longer than that. Therefore, when it is going to secure the area of the flange part pressed with an attachment plate, it is necessary to lengthen the diameter dimension of a flange part with the enlargement of the diameter of an attachment plate. For this reason, in the conventional fuel pump mounting structure, the diameter of the flange portion of the fuel pump, the mounting plate, the opening of the fuel tank, and the like is increased.

  Such an increase in diameter is not preferable from the viewpoint of ensuring the sealing performance between the fuel tank and the flange portion because the total distance to be sealed becomes longer.

  An object of the present invention is to provide a fuel pump mounting structure that can suppress an increase in the diameter of an opening, a flange, and a mounting plate of a fuel tank, and can secure a sealing property between the flange of the fuel pump and the fuel tank. It is in.

  The first aspect of the present invention is a fuel tank in which a pump insertion port is formed, and a pump body disposed inside the fuel tank, and a seal member is provided on the outer surface of the peripheral edge of the pump insertion port. An internal combustion engine having a pump flange portion with which the inner surface of the flange overlaps, a plurality of connecting members protruding from the outer surface of the flange of the pump flange portion in the direction opposite to the fuel tank and extending along the outer surface of the flange A fuel pump that delivers fuel to the ring, and an annular shape that has a larger contour than the pump flange portion, is placed on the outer surface of the flange portion of the pump flange portion, and has an opening through which the bases of a plurality of connecting members penetrate in the center portion And a mounting plate in which a plurality of coupling points coupled to the outer wall of the fuel tank are arranged along the circumferential direction. The attachment plate has a narrow portion where the distance between the outer peripheral edge and the opening edge of the opening portion is locally shortened, and the interval between adjacent joints across the narrow portion does not sandwich the narrow portion. It is characterized in that it is set shorter than the interval between adjacent joining points.

  In said aspect, it can be set as the structure by which the notch-shaped recessed part is formed in the opening edge of a narrow part.

  In the above aspect, it is preferable that the length of the line connecting the narrow portion and the opening edge farthest from the narrow portion is set to be the maximum transverse length of the opening.

  In the above aspect, the narrow portion includes a facing region where the plurality of connecting members face each other in the pump flange portion, a region sandwiched between the facing regions, and a plurality of connecting members opposite to each extending direction. It is preferable that the extended virtual extension portion is disposed at a position deviating from a virtual facing region where the virtual extending portions face each other and a region sandwiched between the temporary facing regions.

  In the above aspect, the opening is a plurality of states provided in the pump flange portion only by the opening gap in which the line connecting the narrow portion and the opening edge farthest from the narrow portion has the maximum transverse length. It is preferable that the connecting member is set so that it can pass through.

  In said aspect, a narrow part is good also as a structure provided in a pair of location which opposes on both sides of the opening part in an attachment plate.

  In the above aspect, the plurality of connecting members are a fuel connector and a power connector connected to the pump body.

  8. The fuel pump mounting structure according to claim 7, wherein the fuel connector is extended in a direction in which the distance from the body frame of the motorcycle is the shortest.

  In the above aspect, it is preferable that the tip end portion of the fuel connector and the tip end portion of the power connector are set to be opposite to each other.

  In the above aspect, the fuel connector is preferably disposed closer to the internal combustion engine than the power connector.

  According to a second aspect of the present invention, there is provided a motorcycle, comprising the fuel pump mounting structure described above.

  According to the fuel pump mounting structure of the present invention, since the plate width of the annular plate body can be widened except for the portion where the narrow portion is formed in the opening portion of the mounting plate, the rigidity of this portion can be increased. A necessary surface pressure can be generated for the pump flange portion. And in the location where the narrow portion is formed in the opening, the interval between the adjacent joint portions across the narrow portion is set shorter than the interval between the adjacent joint portions without sandwiching the narrow portion. Therefore, a pressing force from the pump flange portion to the fuel tank side in the vicinity of the narrow portion can be secured. Therefore, the sealing performance can be secured over the entire area between the pump flange portion and the outer surface of the peripheral surface of the pump insertion port of the fuel tank.

  Further, according to the fuel pump mounting structure of the present invention, a plurality of connecting members protruding from the pump flange can be passed through the opening without enlarging the entire opening of the mounting plate. There is no need to increase the diameter of the pump flange and the mounting plate in order to increase the area where the surface pressure between the pump flange and the pump flange is generated, and the pump flange can be prevented from increasing in diameter. .

  Furthermore, according to the motorcycle according to the present invention, for example, the fuel hose and the harness connected to the connecting member can be prevented from being damaged by being rubbed in contact with each other, without interfering with each other. It is possible to improve attachment and after-sale serviceability.

FIG. 1 is a perspective view showing a fuel tank to which a fuel pump mounting structure according to an embodiment of the present invention is applied. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is an exploded cross-sectional view of a fuel tank to which the fuel pump mounting structure according to the embodiment of the present invention is applied. FIG. 4 is a plan view of the fuel pump used in the fuel pump mounting structure according to the embodiment of the present invention. FIG. 5A is a plan view for explaining a method of mounting the mounting plate on the fuel pump used in the fuel pump mounting structure according to the embodiment of the present invention. FIG. 5-2 is a plan view showing a state in which the mounting plate is mounted on the fuel pump used in the fuel pump mounting structure according to the embodiment of the present invention. FIG. 6 is a main part perspective view showing an example in which the fuel pump mounting structure according to the embodiment of the present invention is applied to a scooter type motorcycle. FIG. 7-1 is a plan view illustrating a method for mounting the mounting plate on the fuel pump, showing a modification of the mounting structure of the fuel pump according to the embodiment of the present invention. FIG. 7-2 is a plan view showing a modified example of the fuel pump mounting structure according to the embodiment of the present invention, in which a mounting plate is mounted on the fuel pump.

  Below, the detail of the attachment structure of the fuel pump which concerns on embodiment of this invention is demonstrated based on FIGS. The fuel pump mounting structure according to this embodiment can be applied to a scooter type motorcycle as shown in FIG.

(Overview of fuel pump mounting structure)
As shown in FIGS. 1 to 3, the fuel pump mounting structure includes a fuel tank 1, a fuel pump 2 mounted on the fuel tank 1, and a mounting plate 3 that supports the fuel pump 2 on the fuel tank 1. The fuel pump 2 is attached to the fuel tank 1 by fixing the attachment plate 3 to the fuel tank 1 side.

(Fuel tank)
As shown in FIGS. 1 and 2, the fuel tank 1 includes a container-like lower tank part 11 and a lid-like upper tank part 12 that covers an opening of the lower tank part 11. A lower tank flange portion 11 </ b> A is formed at the upper opening edge of the lower tank portion 11 so as to protrude laterally and circulate along the upper opening edge. An upper tank flange portion 12 </ b> A that protrudes sideways and circulates is formed on the lower peripheral edge of the upper tank portion 12. The fuel tank 1 is formed by joining the lower tank flange portion 11A and the upper tank flange portion 12A.

  A portion where the lower tank flange portion 11 </ b> A and the upper tank flange portion 12 </ b> A are joined is a bowl-shaped tank flange portion 13 formed around the fuel tank 1. As shown in FIG. 1, a plurality of attachment holes 14 are formed in the tank flange portion 13. In the present embodiment, the fuel tank 1 is formed of a metal material, but a resin material may be integrally formed by, for example, blow molding.

  As shown in FIG. 1, a cylindrical fuel inlet 4 is formed in an appropriate position in the upper tank portion 12. A cap 5 is detachably attached to the fuel injection port 4. As shown in FIGS. 2 and 3, a pump insertion port 6 is formed in the upper tank portion 12. A pump flange portion 22 to be described later is in contact with an outer side surface (upper surface) 15 around the pump insertion port 6. As shown in FIG. 3, the outer side surface 15 around the insertion port 6 is formed to be slightly lower than the surrounding surface. Further, a seal member abutting surface 17 is formed on the outer surface 15 on the pump insertion port 6 side via a stepped portion 16 that circulates so as to be lower than the outer surface 15. Further, around the outer surface 15, a plurality of bolt receiving portions 18 having female screw holes formed in the vertical direction are formed as coupling points. The arrangement and interval of the plurality of bolt receiving portions 18 will be described later.

(Fuel pump)
As shown in FIGS. 2 and 3, the fuel pump 2 includes a pump main body 21 constituting an in-tank type pump unit including a pressure regulator 21 </ b> A, a relief valve 21 </ b> B, and the like, and a disk provided on the top of the pump main body 21. And a plurality of pump flange portions 22 connected to the pump main body 21 side and projecting upward from the flange outer surface of the pump flange portion 22 in the opposite direction to the fuel tank 1 and extending along the flange outer surface. A power supply connector 23 and a fuel connector 24 as connecting members are schematically configured.

  As shown in FIGS. 2 and 3, a suction portion 25 for sucking fuel in the fuel tank 1 is provided at the lower portion of the pump body 21. A filter 26 is provided at a suction port (not shown) of the suction portion 25, and fuel is filtered by the filter 26. Note that the pump body 21 and the suction portion 25 are set to have a thickness dimension and a width dimension that can pass through the pump insertion port 6 formed in the fuel tank 1.

  In addition, a fuel shortage detection unit 27 is provided at an intermediate portion of the pump body 21. One end of a sender gauge 28 is rotatably supported by the fuel shortage detection unit 27. A float 29 is provided at the other end of the sender gauge 28. Since the float 29 follows the fuel level, the fuel shortage detector 27 can detect the remaining amount of fuel based on the operation of the sender gauge 28. The float 29 and the sender gauge 28 can be inserted through the pump insertion port 6 of the fuel tank 1 by rotating the sender gauge 28 and arranging it along the pump body 21.

  Wirings connected to the power connector 23 are routed in the fuel shortage detection unit 27 and the power unit of the pump body 21 so that signals can be output and power can be supplied. A wire harness 7 described later is connected to the power connector 23. The pump body 21 is provided with a pipe (not shown) that allows the fuel introduced from the suction portion 25 to communicate with the fuel connector 24.

  The pump flange portion 22 is a circular flat plate. The contour of the pump flange portion 22 in plan view is provided so that the contour of the pump body 21 is substantially concentric. That is, the shape in which the pump flange portion 22 is provided on the upper portion of the pump body 21 is a shape in which a bowl-shaped plate is formed around the upper portion of the pump body 21. As shown in FIG. 3, the fuel pump 2 has a lower peripheral surface (flange inner side surface) 22 </ b> A of the pump flange portion 22 in a state where the pump main body 21, the suction portion 25, the float 29 and the like are housed in the fuel tank 1. The outer tank 15 contacts the outer surface 15 of the pump insertion port 6. Between the peripheral lower surface 22A of the pump flange portion 22 and the seal member contact surface 17 of the upper tank portion 12, a seal member 10 made of, for example, a resin O-ring is interposed.

  As shown in FIG. 5A, a positioning projection 22 </ b> B projects from an appropriate position on the upper surface (flange outer surface) of the pump flange portion 22. The positioning projection 22B is fitted into a positioning opening 34 of the mounting plate 3 to be described later, thereby positioning the pump flange portion 22 and the mounting plate 3.

  As shown in FIG. 5A, in the pump flange portion 22, a facing region where the power connector 23 and the fuel connector 24 are disposed facing each other, a region sandwiched between the facing regions of the power connector 23 and the fuel connector 24, A region (a hatched portion in the drawing) includes a virtual facing region in which virtual extension portions extending in the direction opposite to the extending direction of the power connector 23 and the fuel connector 24 are opposed to each other and a region sandwiched between these virtual facing regions. The region 22C) is set so that the narrow portion 32 and the concave portion 32A of the mounting plate 3 to be described later do not overlap. In addition, the virtual extension part extended in the direction opposite to the extending direction in the power connector 23 is a region sandwiched between the straight lines L1 and L2 shown in FIGS. 5A and 5B and extends in the fuel connector 24. The virtual extension part extended in the direction opposite to the direction is a region sandwiched between the straight lines L3 and L4. The facing region where the power connector 23 and the fuel connector 24 are arranged, the virtual facing region where the virtual extension portion extending in the direction opposite to the extending direction is opposed, and the region sandwiched therebetween are the pump flange portion 22. This is a region including a region where these are projected on the upper surface (flange outer surface), and is a region 22C indicated by diagonal lines in FIG.

  As shown in FIGS. 4, 5-1, and 5-2, the angle formed between the extending directions of the power connector 23 and the fuel connector 24, that is, the sandwiching angle is determined by the power connector 23 with respect to the pump flange portion 22. In addition, it is determined from the viewpoint of assembling properties of the fuel connector 24, the wire harness 7, the fuel hose 8, and the like, but it is preferable to set the angle to the minimum.

  The power connector 23 is used for connection between electrical wiring (not shown) connected to the pressure regulator 21A and the like provided in the pump body 21 and the wire harness 7 (see FIG. 6). The power connector 23 includes a connector base 23A that protrudes from the upper surface (flange outer surface) of the pump flange portion 22 and extends in a predetermined direction along the upper surface (flange outer surface) of the pump flange portion 22; And a power supply coupler 23B attached to an end of the extending direction of 23A.

  The fuel connector 24 includes a fuel discharge pipe 24 </ b> A that discharges fuel sucked from a suction portion 25 provided at a lower portion of the pump body 21, and a connector portion 24 </ b> B as a tip portion. The fuel discharge pipe 24 </ b> A protrudes outward from the approximate center of the pump flange portion 22, and extends so as to bend along the pump flange portion 22 in a predetermined direction. A connector portion 24B is attached to the end of the fuel discharge pipe 24A. The tip of this connector portion 24B is a connection nozzle portion (tip portion) 24B1 that is bent so as to be perpendicular to the extending direction of the fuel discharge pipe 24A. A fuel hose 8 (see FIG. 6) connected to the internal combustion engine side is connected to the connection nozzle portion 24B1.

(Mounting plate)
As shown in FIGS. 2, 3, 5-1 and 5-2, the mounting plate 3 has a larger contour than the pump flange portion 22, and an annular plate body in which a circular opening 31 is formed in the center portion. It is arranged so as to overlap the outer surface (upper surface) of the pump flange portion 22. The opening 31 is disposed so that the connector base 23A of the power connector 23 and the fuel discharge pipe 24A of the fuel connector 24 penetrate therethrough.

  As shown in FIGS. 5A and 5B, the attachment plate 3 has a notch-like recess 32 </ b> A formed in a part of the opening edge of the opening 31, and the outer peripheral edge and the opening of the opening 31. A narrow portion 32 where the distance to the edge is locally shortened is formed. The maximum transverse length R of the opening 31 is set so as to pass through the recess 32A. That is, by setting the narrow portion 32 in which the concave portion 32 </ b> A is formed, the gap distance to the opposite bank of the opening 31 is set to be the maximum. Only the opening gap having the maximum transverse length R in the mounting plate 3 is set so that both the power connector 23 and the fuel connector 24 can pass through. As shown in FIG. 5A, the shortest distance D from the end of the power connector 23 and the fuel connector 24 that is shorter in the extending direction (power connector 23) to the longer one in the extending direction (fuel connector 24). Any length that can pass through the opening gap of the maximum transverse length R of the opening 31 may be used. That is, it is only necessary that the shortest distance D is set shorter than the maximum transverse length R. Further, the portion (opening edge) of the opening 31 where the recess 32A is not formed has a short radius so as to surround the vicinity of the connector base 23A of the power connector 23 and the base of the fuel discharge pipe 24A of the fuel connector 24 as much as possible. It is preferable. Thus, when the radius of the opening edge surrounding the connector base portion 23A and the base portion of the fuel discharge pipe 24A is shortened, the vicinity of the center of the pump flange portion 22 can be pressed by the mounting plate 3, so that the wire harness 7 described later The structural durability can be improved against stress caused by vibration of the fuel hose 8 or the like.

  As shown in FIGS. 5A and 5B, the mounting plate 3 includes a plurality (five) of bolt insertion ports 33 </ b> A and 33 </ b> B as a plurality of coupling portions coupled to the upper tank portion 12 of the fuel tank 1. , 33C, 33D, 33E are formed along the circumferential direction. As shown in FIG. 5A, among these bolt insertion ports 33A, 33B, 33C, 33D, and 33E, the interval P1 between the adjacent bolt insertion ports 33A and 33E across the recess 32A (and the narrow portion 32) is set. The bolt insertion ports 33A and 33B, the bolt insertion ports 33B and 33C, the bolt insertion ports 33C and 33D, the bolt insertion ports 33D and 33E, which are adjacent to each other without sandwiching the recess 32A (and the narrow portion 32), It is set shorter than the interval P2.

  Further, a positioning opening 34 is formed at a position away from the position where the narrow portion 32 and the concave portion 32A of the mounting plate 3 are formed. As described above, the positioning opening 34 is positioned by fitting the positioning protrusion 22 </ b> B protruding from the upper surface of the pump flange portion 22.

  In the fuel pump mounting structure according to the present embodiment, as shown in FIGS. 2 and 3, the pump flange portion 22 is disposed in the upper tank portion with the pump main body 21 of the fuel pump 2 disposed in the fuel tank 1. 12 is joined to the outer peripheral surface 15 of the pump insertion port 6. At this time, the sealing performance is maintained by the sealing member 10 being sandwiched between the sealing member abutting surface 17 and the peripheral edge lower surface 22A of the pump flange portion 22. Then, the mounting plate 3 is overlaid on the pump flange portion 22, and bolt insertion ports 33 </ b> A, 33 </ b> B, 33 </ b> C, 33 </ b> D, 33 </ b> E formed on the mounting plate 3, and the bolt receiving portion 18 formed on the upper tank portion 12. The bolt 9B is screwed to the bolt receiving portion 18 using a washer 9A. In addition, the arrangement | positioning of the some bolt receiving part 18 formed in the upper tank part 12 is the same arrangement | positioning space | interval so as to correspond with arrangement | positioning of the bolt insertion ports 33A-33E formed in the attachment plate 3. FIG.

  As shown in FIG. 6, the wire harness 7 connected to the power connector 23 is routed rearward of the fuel tank 1, and the fuel hose 8 connected to the connection nozzle portion 24B1 of the fuel connector 24 is connected to the fuel tank. It is routed to go to the front of 1.

(installation method)
A procedure for attaching the fuel pump 2 to the fuel tank 1 will be described. First, as shown in FIG. 3, the seal member 10 is placed below the pump flange portion 22 of the fuel pump 2 through the seal member 10 through the suction portion 25, the sender gauge 28, the float 29, and the pump body 21.

  Thereafter, the suction portion 25, the sender gauge 28, the float 29, and the pump body 21 of the fuel pump 2 are inserted into the fuel tank 1 from the pump insertion port 6 of the upper tank portion 12 of the fuel tank 1. Then, the seal member 10 is arranged on the seal member contact surface 17 at the periphery of the pump insertion port 6 of the upper tank portion 12.

  Next, as shown in FIG. 5A, the end of the fuel connector 24 (connector portion) that is long in the extending direction among the power connector 23 and the fuel connector 24 projecting on the pump flange portion 22 of the fuel pump 2. The connection nozzle part 24B1) of 24B is passed through the opening 31 of the mounting plate 3. Thereafter, the portion of the opening 31 of the mounting plate 3 having the maximum transverse length R is aligned with the portion of the shortest distance D between the fuel connector 24 and the power connector 23, and the power coupler 23B at the tip of the power connector 23 is attached. Pass through the opening 31. In this way, both the fuel connector 24 and the power connector 23 can be passed through the opening 31, and the mounting plate 3 can be superimposed on the pump flange portion 22.

  Then, as shown in FIG. 5B, the mounting plate 3 is adjusted so that the positioning protrusions 22 </ b> B protruding from the pump flange portion 22 enter the positioning openings 34 of the mounting plate 3.

  After positioning the pump flange portion 22 and the mounting plate 3 in this way, the bolt insertion ports 33A to 33E of the mounting plate 3 and the bolt receiving portion 18 formed in the upper tank portion 12 are aligned. The interval between the bolt insertion ports 33A and 33E sandwiching the narrow portion 32 and the recess 32A in the mounting plate 3 is set shorter than the interval between the other bolt insertion ports. Similarly, the arrangement state of the bolt receiving portion 18 formed in the upper tank portion 12 is the same as the arrangement of the bolt insertion ports 33A to 33E. For this reason, by aligning the bolt insertion ports 33 </ b> A to 33 </ b> E of the mounting plate 3 with the bolt receiving portion 18, the rotational position of the pump flange portion 22 is also aligned, and the pump body 21 is brought to an appropriate position in the fuel tank 1. Can be placed.

  Thereafter, the attaching operation of the fuel pump 2 to the fuel tank 1 is completed by assembling and screwing the washer 9A and the bolt 9B to each of the bolt insertion ports 33A to 33E.

(Example applied to a scooter type motorcycle)
FIG. 6 is a perspective view showing a state in which the fuel tank 1 having the fuel pump mounting structure according to the embodiment of the present invention is applied to a scooter type motorcycle. As shown in FIG. 6, the tank flange portion 13 at the rear portion of the fuel tank 1 is attached to a pair of rear body frame members 41 provided on the left and right sides of the scooter type motorcycle along the front-rear direction via brackets (not shown). It is fixed by a bolt 42 inserted through (see FIG. 1). Further, the tank flange portion 13 at the front portion of the fuel tank 1 is fixed by inserting bolts 42 into two left and right attachment holes with respect to a cross member 43 installed between the rear body frame members 41.

  As shown in FIG. 6, in the present embodiment, the connector portion 24B of the fuel connector 24 extends in the direction of the shortest distance to the rear body frame member 41 on the left side and is connected to the tip of the connector portion 24B. The hose 8 is routed toward the front where the internal combustion engine and the injector 44 (not shown) are arranged. Further, the fuel connector 24 is disposed at a position closer to the internal combustion engine (not shown) than the power connector 23, and the fuel hose 8 connected to the fuel connector 24 is forced toward the left rear body frame member 41 at the shortest distance. Without being guided, the rear body frame member 41 is locked by the locking member 45, and the rear body frame member 41 is guided to the internal combustion engine side. With such an attachment structure, the fuel hose 8 can be shortened, and the stress applied to the base of the fuel connector 24 during vehicle vibration can be reduced. In addition, the detachability with respect to the fuel connector 24 can be improved by giving the fuel hose 8 a slack in a state where the fuel hose 8 is not engaged with the rear body frame member 41. And in the state latched by the rear body frame member 41, the bending of the fuel hose 8 can be made small and a vibration can be suppressed. The sandwiching angle between the fuel connector 24 and the fuel hose 8 can be set to 90 to 180 degrees, and is preferably about 90 degrees.

  The wire harness 7 connected to the power connector 23 is routed in the direction opposite to the fuel hose 8. For this reason, when the scooter type motorcycle is operated, the wire harness 7 and the fuel hose 8 can be prevented from being damaged or entangled due to contact and rubbing, thereby ensuring attachment and after-service. be able to.

(Action / Effect)
In the fuel pump mounting structure described above, the diameter of the pump flange portion 22 is determined by the outer diameter of the mounting plate 3, and the pump flange portion 22 of the fuel pump 2 is pressed against the outer surface 15 of the upper tank portion 12. It is desirable that the diameter dimension of the opening 31 of the mounting plate 3 is as small as possible because the minimum width of the plate portion of the mounting plate 3 is necessary.

  Therefore, in the present embodiment, the opening gap including the portion where the narrow portion 32 and the concave portion 32A of the mounting plate 3 are formed is set to be the maximum transverse length R of the opening 31, and the maximum transverse Only the opening gap having the length R is set so that both the power connector 23 and the fuel connector 24 can pass through. That is, the distance D (see FIG. 5-1) from the end of the power connector 23 and the fuel connector 24 that is shorter in the extending direction (power connector 23) to the longer one in the extending direction (fuel connector 24) is Any length that can pass through the opening gap of the maximum transverse length R of the opening 31 may be used. For this reason, the maximum transverse length R is substantially the same as the distance D between the power connector 23 and the fuel connector 24. Thus, by forming the recess 32A, it is possible to reduce the diameter of the opening 31 where the recess 32A is not formed, and the contact area between the mounting plate 3 and the pump flange portion 22 is ensured. Therefore, it is possible to prevent the mounting plate 3 and the pump flange portion 22 from increasing in diameter in order to increase the contact area between the mounting plate 3 and the pump flange portion 22.

  As described above, the diameter of the mounting plate 3 and the pump flange portion 22 can be prevented. On the other hand, the portion where the recess 32A is formed in the opening 31 of the mounting plate 3 This is disadvantageous for generating the necessary surface pressure because the area to receive the force is reduced and the rigidity is smaller than the other parts. However, in the present embodiment, among the coupling locations coupled by the bolt 9B and the bolt insertion ports 33A to 33E, the spacing between the coupling locations adjacent to each other with the recess 32A interposed therebetween, that is, the spacing P1 between the bolt insertion ports 33A and 33E. Further, the interval is set shorter than the interval P2 between the bolt insertion ports adjacent to each other without sandwiching the recess 32A. For this reason, the seal member 10 interposed between the pump flange portion 22 and the upper tank portion 12 is surely pressed at the place where the narrow portion 32 and the concave portion 32A are formed on the mounting plate 3, and the pump flange portion 22 is pressed. And the upper tank part 12 can be secured.

  Further, in the fuel pump mounting structure according to the present embodiment, the narrow portion 32 and the recessed portion 32A of the pump flange portion 22 do not overlap with the hatched region (recessed region) 22C shown in FIG. By doing so, even if vertical force is applied to the power connector 23 and the fuel connector 24 as connecting members, the wire harness 7 connected to them, the fuel hose 8 and the like due to vibration of the vehicle or the like, It can suppress that the stress accompanying a vibration reaches directly the location in which the narrow part 32 and the recessed part 32A were formed. For this reason, the fall of the sealing performance accompanying driving | running | working of a vehicle etc. can be prevented.

(Other embodiments)
Although the fuel pump mounting structure according to the embodiments of the present invention has been described above, it should not be understood that the descriptions and drawings constituting a part of the disclosure of these embodiments limit the present invention. In addition, all the embodiments that bring about an effect equivalent to the object of the present invention are included. Also, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but can be defined by any desired combination of specific features among all the disclosed features. It is.

  For example, in the above embodiment, one recess 32A is formed at the opening edge of the opening 31 of the mounting plate 3. However, as shown in the modified examples of FIGS. It is good also as a structure formed in a pair of location which opposes in the opening edge of 31. In this modification, the bolt insertion ports 33A and 33F that sandwich the pair of narrow portions 32 and the recess 32B in the mounting plate 3 and the interval P1 between the bolt insertion ports 33C and 33D are adjacent to each other without sandwiching the recess 32B. It is set shorter than the interval P2 between the bolt insertion openings. Moreover, since the recessed part 32B in this modification may have a recessed degree less than the recessed part 32A of the said embodiment, the attachment area of the attachment plate 3 with respect to the pump flange part 22 falls locally. There is an advantage that it can be suppressed.

  When the pair of recesses 32B is provided as described above, the interval P1 between the coupling portions sandwiching the recess 32B can be set to a length close to the interval P2 between the adjacent coupling portions without sandwiching the narrow portion 32 and the recess 32B. it can. Even in this case, even if the difference between the interval P1 and the interval P2 is small, the positional relationship between the bolt insertion ports 33A to 33F of the mounting plate 3 and the bolt receiving portion 18 of the upper tank portion 12 is not appropriate. Since the bolt 9B cannot be tightened, a positioning effect can be achieved.

  In the fuel pump mounting structure according to the above embodiment, the bolt receiving portion 18 is provided on the fuel tank 1 side, and the bolt 9B inserted from above the mounting plate 3 is screwed into the bolt receiving portion 18. However, the coupling means of the coupling portion between the fuel tank 1 side and the mounting plate 3 is not limited to this. It is good also as a structure which protrudes in the fuel tank 1 side so that a volt | bolt may face upwards, and is nut-fastened in the state which inserted the volt | bolt in the volt | bolt insertion port of the attachment plate 3. FIG.

  Further, in the fuel pump mounting structure according to the above-described embodiment, the pump flange portion 22 and the mounting plate 3 are circular. However, the present invention is not limited to this, and various shapes can be used depending on the structure on the fuel tank 1 side. It can be.

DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Fuel pump 3 Mounting plate 6 Pump insertion port 7 Wire harness 8 Fuel hose 9B Bolt 10 Seal member 13 Tank flange part 15 Outer surface (tank seal surface)
17 Sealing member contact surface 18 Bolt receiving part 21 Pump body 22 Pump flange part 23 Power supply connector (member for connection)
23A connector base 23B power coupler 24 fuel connector (connecting member)
24A Fuel discharge pipe 24B Connector portion 24B1 Connection nozzle portion 31 Open portion 32 Narrow portion 32A, 32B Recessed portion 33A to 33F Bolt insertion port 34 Positioning opening portion 41 Rear body frame member 42 Bolt 44 Injector 45 Locking member

Claims (11)

A fuel tank formed with a pump insertion port;
In a state where the pump main body is disposed inside the fuel tank, a pump flange portion is provided on the outer peripheral surface of the peripheral portion of the pump insertion port with a flange inner surface overlapping with a seal member, and the pump flange portion is outside the flange. A fuel pump that protrudes in the opposite direction from the fuel tank from a side surface and that is provided with a plurality of connecting members extending along the outer surface of the flange;
It is an annular plate body that has a larger contour than the pump flange portion, is disposed so as to overlap the outer surface of the flange of the pump flange portion, and has an opening through which the base portions of the plurality of connecting members pass in the center portion. A mounting plate in which a plurality of coupling points coupled to the fuel tank are arranged along a circumferential direction;
A fuel pump mounting structure having
The mounting plate has a narrow portion where a distance between an outer peripheral edge and an opening edge of the opening portion is locally shortened, and an interval between the coupling portions adjacent to each other across the narrow portion is narrow. The fuel pump mounting structure is characterized in that it is set to be shorter than the interval between the adjacent joints without sandwiching the portion.   2. The fuel pump mounting structure according to claim 1, wherein a notch-shaped recess is formed in the opening edge of the narrow portion.   3. The length of a line connecting the narrow portion and the opening edge farthest from the narrow portion is a maximum transverse length of the opening. The fuel pump mounting structure described.   The narrow portion includes a facing region where the plurality of connecting members are opposed to each other in the pump flange portion, a region sandwiched between the facing regions, and the plurality of connecting members opposite to the extending directions thereof. 4. The apparatus according to claim 1, wherein the extended virtual extension portion is disposed at a position deviated from a virtual facing region facing each other and a region sandwiched between the temporary facing regions. 5. The fuel pump mounting structure described.   The opening is only in the opening gap where the line connecting the narrow part and the opening edge farthest from the narrow part has the maximum transverse length, and the opening flange is provided in the pump flange part. The fuel pump mounting structure according to any one of claims 1 to 4, wherein a plurality of connecting members are set to be able to pass therethrough.   The fuel pump mounting structure according to any one of claims 1 to 5, wherein the narrow portion is provided at a pair of locations facing each other across the opening in the mounting plate.   The fuel pump mounting structure according to any one of claims 1 to 6, wherein the plurality of connection members are a fuel connector and a power connector connected to the pump body.   8. The fuel pump mounting structure according to claim 7, wherein the fuel connector extends in a direction that makes the distance from the body frame of the motorcycle the shortest.   9. The fuel pump mounting structure according to claim 7, wherein a front end portion of the fuel connector and a front end portion of the power connector are set to be opposite to each other.   The fuel pump mounting structure according to any one of claims 7 to 9, wherein the fuel connector is disposed closer to the internal combustion engine than the power connector.   A motorcycle comprising the fuel pump mounting structure according to any one of claims 1 to 10.

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