JP2011074865A - Fuel pump structure - Google Patents

Abstract

An object of the present invention is to provide a fuel pump structure in which a primary filter is removable.
A fuel pump body 8A having a fuel suction port 67 attached to a fuel tank in a detachable manner and extending in an axis PJ direction at an end portion, and an arm portion 68 extending in a radial direction from the fuel pump body 8A. The primary filter 16 having a sender 17 provided with a detecting portion 69, a connecting portion 74 attached to the fuel inlet 67 of the fuel pump main body 8A, and a filter portion 75 extending radially from the connecting portion 74. In the fuel pump structure provided, the primary filter 16 is detachably attached to the fuel suction port 67 of the fuel pump main body 8A via the connecting portion 74, and the extending direction of the filter portion 75 of the primary filter 16 and the arm portion of the sender 17 are provided. The extending direction of 68 was set in the same direction.
[Selection] Figure 10

Description

  The present invention relates to a structure of a fuel pump.

  There is a type in which an in-tank type fuel pump is attached to a fuel tank of a vehicle such as a motorcycle. This type of fuel pump includes a pump body, a sender, and a primary filter, and these pump body, sender, and primary filter are assembled to form a single unit. (See Patent Document 1).

JP 2004-232572 A

Conventionally, when maintaining the primary filter, it is necessary to remove the fuel pump from the fuel tank for maintenance.
However, the conventional fuel pump is assembled with the above-mentioned parts integrated, and when performing maintenance on each part, perform sufficient maintenance, such as cleaning only in the state where it is assembled to the fuel pump. There are issues that make it difficult.
If the primary filter is to be replaced, there is no choice but to deal with it by exchanging the fuel pump itself or even the parts to which the primary filter is assembled, which requires maintenance costs. In particular, there is a demand for a fuel pump structure that can easily perform maintenance of a primary filter whose clogging is unavoidable due to use over time.

  Accordingly, an object of the present invention is to provide a fuel pump structure in which a primary filter can be attached and detached.

  In order to achieve the above object, the invention described in claim 1 is detachably attached to a fuel tank (for example, the fuel tank 1 in the embodiment) and has an axis at the end (for example, the axis PJ in the embodiment). A fuel pump main body (for example, fuel pump main body 8A in the embodiment) having a fuel intake port (for example, fuel intake port 67 in the embodiment) extending to the arm, and an arm portion extending in the radial direction from the fuel pump main body A sender (for example, the sender 17 in the embodiment) provided with a detection unit (for example, the detection unit 69 in the embodiment) on the arm part 68 (for example, the arm portion 68 in the embodiment), and a connection attached to the fuel inlet of the fuel pump main body. Part (for example, the connection part 74 in the embodiment) and a filter part (for example, a filter in the embodiment) extending radially from the connection part. And a primary filter (for example, the primary filter 16 in the embodiment) having a filter portion 75), the primary filter can be attached to and detached from the fuel suction port of the fuel pump body via the connecting portion. The extending direction of the filter part of the primary filter and the extending direction of the arm part of the sender are set in the same direction.

  According to a second aspect of the present invention, the primary filter includes an engaging portion (for example, a claw portion 80 in the embodiment) that engages with the fuel pump main body or the sender, and the fuel suction port of the fuel pump main body has the above-described fuel inlet. By connecting the connection part of the primary filter, the fuel pump body or the sender is engaged and fixed.

  According to a third aspect of the present invention, the connecting portion of the primary filter includes a flange portion (for example, the flange portion 93 in the embodiment) extending in the radial direction of the fuel pump main body, and a bolt insertion hole is provided in the flange portion. (For example, the bolt insertion hole 94 in the embodiment) is provided, and the sender body (for example, the sender body 64 in the embodiment) covering the bottom surface of the fuel pump body (for example, the bottom wall 82 in the embodiment) A fastening hole (for example, a fastening hole 96 in the embodiment) provided in the outer periphery of the fuel suction port is provided, and the primary by a bolt (for example, the bolt 97 in the embodiment) through the bolt insertion hole and the fastening hole. A filter is attached to the fuel pump body.

  The invention described in claim 4 is characterized in that the extension length of the arm portion of the sender and the extension length of the filter portion of the primary filter are set to be substantially the same length.

  According to a fifth aspect of the present invention, the fuel suction port is provided eccentrically from the center of the fuel pump body toward the sender side, and the connection portion of the primary filter extends toward the center of the fuel pump body. Further, a flange portion fixed to the fuel pump main body or the sender main body is provided.

  According to a sixth aspect of the present invention, the fuel suction port is eccentric to the side opposite to the sender, and the primary filter is a line connecting the center of the fuel pump body and the fuel suction port (for example, in the embodiment) Line L) is disposed on one side, and the other side is provided with a flange portion fixed to the fuel pump body on the connection portion.

  According to a seventh aspect of the present invention, the engaging portion is a claw portion (for example, the claw portion 80A in the embodiment) that is inclined in the direction of dropping in the insertion direction in the direction of the axis of the connecting portion (for example, the axis J in the embodiment). The claw portion is provided with a tapered surface (for example, a tapered surface 98 in the embodiment) along one direction of the peripheral surface of the connection portion.

  The invention described in claim 8 is characterized in that a stopper arm (for example, the stopper arm 99 in the embodiment) made of an elastic material that restricts the rotation of the primary filter in one direction is provided from the arm portion of the sender. And

  According to a ninth aspect of the present invention, the fuel inlet (for example, the fuel inlet 67A in the embodiment) is provided with an annular flange portion (for example, the annular flange portion 100 in the embodiment), and the connection of the primary filter is performed. The portion (for example, the connecting portion 74A in the embodiment) includes a plurality of locking claws (for example, the extended claw portion 103 in the embodiment) that are locked to the annular flange portion when the primary filter is attached. And

  According to the tenth aspect of the present invention, a taper-like protruding portion (for example, the protruding portion 105 in the embodiment) whose upper surface gradually increases in one circumferential direction of the annular flange portion on the outer peripheral surface of the annular flange portion. ) And the protrusion is located between the plurality of locking claws.

According to the first aspect of the present invention, the primary filter can be attached to and detached from the fuel pump main body, so that the primary filter can be replaced, and the extending direction of the filter portion of the primary filter can be set to the arm portion of the sender. By setting the same direction as the extending direction, the fuel pump can be easily inserted into the fuel tank.
According to the invention described in claim 2, the primary filter can be fixed to the fuel pump main body or the sender with one touch.
According to the invention described in claim 3, the primary filter can be detachably attached to the fuel pump main body or the sender with the bolt.
According to the invention described in claim 4, since the insertion work into the fuel tank can be performed from one direction, the work becomes easy.
According to the fifth aspect of the present invention, it is easy to secure a mounting space for the flange portion by decentering the fuel inlet.
According to the sixth aspect of the present invention, the fuel suction port is decentered and the primary filter is moved to one side so that the extension of the primary filter to the outer periphery of the fuel pump body can be reduced and the structure is easy to install. can do.
According to the seventh aspect of the invention, the primary filter can be easily fixed to the fuel pump main body, and when removing the primary filter from the fuel pump main body, the claw portion can be easily formed along the tapered surface by rotating the primary filter. It can be removed from the fuel pump body.
According to the eighth aspect of the invention, the primary filter is positioned with respect to the fuel pump main body by the stopper arm so as not to rotate, and when removing the primary filter, the stopper arm is elastically deformed to allow the primary filter to rotate. To do.
According to the invention described in claim 9, the primary filter can be locked to the fuel suction port by the locking claw, and a compact attachment can be achieved.
According to the tenth aspect of the present invention, the primary filter can be positioned in the circumferential direction with respect to the fuel pump main body, and when removing the primary filter, if the primary filter is rotated, each latching claw becomes a protrusion. By gradually climbing, the locking state of the locking claw with respect to the annular flange portion is released, and the primary filter can be easily removed from the fuel pump body.

It is a disassembled perspective view of the fuel tank of each embodiment of this invention. It is a principal part enlarged view of FIG. FIG. 3 is an enlarged plan view of FIG. 2. It is sectional drawing which follows the leg part of FIG. It is a principal part enlarged view of FIG. It is a top view equivalent to FIG. 3 of another aspect. It is principal part side explanatory drawing of the said other aspect. It is principal part side explanatory drawing of the said other aspect. It is a disassembled perspective view of a fuel pump. It is principal part typical sectional explanatory drawing of 1st Embodiment. It is a principal part perspective view around the fuel inlet of 1st Embodiment. It is a principal part perspective view of the connection part periphery of 1st Embodiment. It is a figure equivalent to FIG. 10 of 2nd Embodiment. It is a figure equivalent to FIG. 10 of 3rd Embodiment. It is explanatory drawing which shows the attachment operation state of FIG. It is a figure equivalent to FIG. 10 of 4th Embodiment. FIG. 17 is a bottom view of FIG. 16 as seen through the primary filter. It is explanatory drawing which shows the attachment operation state of FIG. It is a figure equivalent to FIG. 10 of 5th Embodiment. FIG. 20 is a bottom view of FIG. 19 seen through the primary filter. The principal part of 6th Embodiment is shown, (a) is a front view, (b) A top view, (c) is a side view. It is a figure equivalent to FIG. 10 of 7th Embodiment. It is a perspective view of the connection part of 8th Embodiment. It is sectional explanatory drawing of the connection part and fuel inlet of 8th Embodiment. It is a perspective view of the attachment state of the connection part and fuel inlet of 8th Embodiment.

Next, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a fuel tank 1 of a motorcycle, for example. The fuel tank 1 is formed by welding a steel plate upper half 2 and a lower half 3 with an upper flange 4 and a lower flange 5. Yes. A recess 6 is formed in the upper half 2, and a flat upper wall 7 is formed in the recess 6.

As shown in FIGS. 1 to 3, a circular insertion port 9 for inserting the fuel pump 8 is formed in the upper wall 7. The insertion port 9 is formed at a position one step below the upper wall 7 through the step portion 10. An engagement bracket 11 that locks a retainer 30 described later is welded and fixed around the insertion opening 9. Specifically, the engagement bracket 11 is divided into an insertion bracket 12 that receives the retainer 30 and a fixing bracket 13 that locks the retainer 30. The insertion bracket 12 and the fixing bracket 13 are distributed around the insertion port 9. Is arranged.
The step portion 10 of the upper wall 7 of the fuel tank 1 has a vertical wall 14 that extends vertically from the upper wall 7, and a pump holding surface 15 of the fuel pump 8 that extends horizontally from the vertical wall 14 and constitutes the periphery of the insertion port 9. And has.

  The fuel pump 8 is a so-called in-tank type fuel pump 8 immersed in the fuel tank 1 and supplies fuel in the fuel tank 1 to an injector (not shown). The fuel pump 8 includes a primary filter 16 for filtering impurities in the fuel in the fuel tank 1 and a sender 17 for measuring the fuel level at the lower part. The upper part of the fuel pump 8 has a larger diameter than the lower part, and the pump holding surface 15 at the periphery of the insertion port 9 of the fuel tank 1 with the primary filter 16 and the sender 17 provided in the lower part inserted into the fuel tank 1. And an upper mounting portion 18 that is detachably supported.

A fuel feed pipe 20 is not shown on the other side of the upper wall 19 of the upper mounting portion 18 of the fuel pump 8 along the direction in which the insertion bracket 12 and the fixing bracket 13 constituting the engagement bracket 11 are arranged. A coupler 21 to which the connector is connected is provided. The fuel feed pipe 20 extends to the position beyond the outer peripheral portion of the upper wall 19 of the upper mounting portion 18 of the fuel pump 8 and extends toward the front end side of leg portions 32 and 33 of a retainer 30 to be described later. Reference numeral 21 denotes an inner side of the engagement bracket 11, that is, between the insertion bracket 12 and the fixed bracket 13, and is disposed so as to face a main body 31 of a retainer 30 described later.
On the upper wall 19 of the upper mounting portion 18 of the fuel pump 8, the upper mounting portion 18 is placed on a side portion away from the fuel feed pipe 20 and the coupler 21 so as to be along the arrangement position of the fuel feed pipe 20 and the coupler 21. A pair of guide portions 22, 22 rising from the wall 19 and abutting against the outer edge of the retainer 30 are attached.

  The retainer 30 is an elastically deformable plate-like member that is engaged with the upper mounting portion 18 of the fuel pump 8 inserted from the insertion port 9 of the fuel tank 1 pressed against the pump holding surface 15 of the fuel tank 1. The fuel pump 8 is supported on the fuel tank 1 by being fixed to the bracket 11.

  Specifically, the retainer 30 extends from the main body 31 corresponding to the fixed bracket 13 side of the engagement bracket 11 and the same direction at intervals from both ends of the main body 31, and the distal end corresponds to the insertion bracket 12. A U-shaped member having a pair of leg portions 32 and 33. The leg portions 32 and 33 extend from the base portion on the main body 31 side toward the tip portion with substantially the same width. The distal ends of the legs 32 and 33 are both bent upward, one leg 32 is a bent part 34, and the other leg 33 is a positioning fold extending further upward from the bent part 34 and the bent part 34. A curved portion 35 is provided.

  An insertion hole 29 for a positioning bolt 47 is formed in the positioning bent portion 35. The base portions of the leg portions 32 and 33 are connected to the main body 31 with the inner edges widened in an obliquely widening direction toward the inner side, and the base portions of the leg portions 32 and 33 of the main body 31 are connected to the base portions of the leg portions 32 and 33. Locking pieces 36 that protrude to the opposite side of the tip and offset toward the outside are provided in a protruding manner.

  Here, the protruding length of the locking piece 36 is such that when the bent portion 34 and the positioning bent portion 35 of the leg portions 32 and 33 are inserted into the first openings 42 and 43 of the insertion bracket 12, the fixed bracket 13. Are not locked to the second openings 53 and 54, but are fixed at positions where the bent portions 34 and positioning bent portions 35 of the leg portions 32 and 33 come into contact with the support pieces 44 and 45 of the insertion bracket 12 immediately before contacting. The length is set so as to be engaged with the second openings 53 and 54 of the bracket 13.

  The body 31 of the retainer 30 has a rear edge divided into three parts through two notches 37 at both end sides and the center side, and side bent portions 38 and 38 are center bent at the center side. Both portions 39 are formed in an L-shaped cross-section with rising edges. A stopper hole 40 for the claw piece 55 of the fixed bracket 13 of the engagement bracket 11 is formed on the upper surface of the central bent portion 39.

  The insertion bracket 12 of the engagement bracket 11 has a base 41 fixed to the fuel tank 1 and support pieces 44 and 45 that rise upward from the insertion port 9 side at both ends of the base 41. The support pieces 44, 45 include first openings 42, 43 that respectively insert the leg portions 32, 33 of the retainer 30 from the bent portion 34 and the positioning bent portion 35 so as to be swingable. The support piece 45 is provided with a positioning piece 46 that extends on the positioning bent portion 35 of the leg portion 33 of the retainer 30 and further extends upward. An insertion hole 48 for a positioning bolt 47 is formed in the positioning piece 46, and a weld nut 49 to which the positioning bolt 47 is screwed is welded and fixed to the back side of the positioning piece 46 (see FIG. 3).

  The fixing bracket 13 of the engagement bracket 11 includes a base 50 fixed to the fuel tank 1 and fixing pieces 51 and 52 that rise upward from the insertion port 9 side at both ends of the base 50. The fixing pieces 51 and 52 are formed with second openings 53 and 54 into which the respective locking pieces 36 of the leg portions 32 and 33 of the retainer 30 are inserted and locked. Specifically, the second openings 53 and 54 elastically deform the retainer 30 locked to the first openings 42 and 43 of the insertion bracket 12 of the engagement bracket 11 so as to protrude upward, and thus the fuel pump. In the state where the upper mounting portion 18 is urged against the pump holding surface 15 at the periphery of the insertion port 9 of the fuel tank 1, the locking pieces 36 and 36 of the leg portions 32 and 33 of the retainer 30 are slid and fixed.

  Here, as shown in FIG. 4, the first openings 42 and 43 of the insertion bracket 12 of the engagement bracket 11 and the second openings 53 and 54 of the fixing bracket 13 connect the upper mounting portion 18 of the fuel pump 8 to the fuel tank. 1 is positioned below the upper wall 19 where the fuel pump 8 and the retainer 30 are in contact with the pump holding surface 15, and the retainer 30 is allowed to be deformed and fixed so as to protrude upward. is doing. In addition, although the case where both of the first openings 42 and 43 and the second openings 53 and 54 are located below the upper wall 19 where the fuel pump 8 and the retainer 30 are in contact with each other has been described, at least one of them is described. One should just be located below.

  A claw piece 55 is formed at the central portion of the base 50 of the fixed bracket 13 at the edge opposite to the insertion port 9, and this claw piece 55 is suitable for the fuel pump 8 in which the retainer 30 is fixed to the engagement bracket 11. At the fixed position, it is locked in the stopper hole 40 of the retainer 30.

  Further, at the proper fixing position of the fuel pump 8, the positioning bent portion 35 of the leg portion 33 of the retainer 30 and the positioning piece 46 of the support piece 45 of the insertion bracket 12 of the engagement bracket 11 are overlapped, and the positioning bent portion. 35 and the insertion hole 48 of the positioning piece 46 coincide with each other, and the positioning bolt 47 can be inserted into each of the insertion holes 29 and 48 of the overlapping portion. Therefore, if the positioning bolt 47 can be fastened and fixed to the weld nut 49, the fuel It can be confirmed that the pump 8 is fixed at an appropriate position without displacement.

  As shown in FIG. 5, the upper mounting portion 18 of the fuel pump 8 includes an annular portion 23 that contacts the pump holding surface 15 of the fuel tank 1 and a flange portion 24 that is an upper portion of the annular portion 23 and projects outward. ing. Between the outer peripheral surface 25 of the annular portion 23 of the fuel pump 8, the pump holding surface 15 of the upper wall 7 of the fuel tank 1, and the vertical wall 14 of the stepped portion 10, an annular sealing material 60 having a circular cross section is interposed. Yes. An annular seal member 61 is provided between the outer peripheral surface 26 of the flange portion 24 of the fuel pump 8 and the upper wall 7 of the fuel tank 1. .

  The seal member 61 includes an outer lip 62 that enters between the outer peripheral surface 26 of the flange portion 24 of the fuel pump 8 and the outer surface of the upper wall 7 of the fuel tank 1, and an outer peripheral surface 25 and a step portion of the annular portion 23 of the fuel pump 8. An inner lip 63 that enters between the 10 vertical walls 14

  Therefore, when the fuel pump 8 is attached to the fuel tank 1, the primary filter 16, the float 65 and the sender 17 are inserted from above the insertion port 9 of the fuel tank 1, and the upper attachment portion of the fuel pump 8 is inserted. The lower surface of the annular portion 23 of 18 is brought into contact with the pump holding surface 15 of the upper wall 7 of the fuel tank 1.

  Then, the side bent portion 38 and the central bent portion 39 of the main body 31 of the retainer 30 are gripped, and the bent portions 34 and the positioning bent portions 35 of the leg portions 32 and 33 of the retainer 30 are connected to the first opening portion of the insertion bracket 12. After inserting and locking each of the retainers 30, the main body 31 of the retainer 30 is pushed from the chain line position in FIG. 4 to the solid line position, so that the retainer 30 is curved so as to protrude upward, and the leg portions 32, The locking pieces 36, 36 provided at the base portion 33 are slightly slid and locked to the second openings 53, 54 of the fixing bracket 13 in the direction opposite to the insertion direction of the legs 32, 33.

  Then, the positioning bolt 47 is fastened and fixed to the weld nut 49, and it is confirmed that the fuel pump 8 is fixed at an appropriate position without displacement.

Next, an example in which a retainer 30 ′ is used instead of the retainer 30 of the first embodiment will be described with reference to FIGS.
In this aspect, the engagement bracket 11 ′ and the retainer 30 ′ obtained by changing the engagement bracket 11 and the retainer 30 of the above-described embodiment are used. Since the configuration other than the members related to the engagement bracket 11 ′ and the retainer 30 ′ is the same as that of the first embodiment described above, the same parts are denoted by the same reference numerals and description thereof is omitted.

  The engagement bracket 11 'is divided into an insertion bracket 12' and a fixed bracket 13 '. The insertion bracket 12 'includes a base 41 and support pieces 44 and 45, but the positioning piece 46 of the first embodiment is not formed. First openings 42 and 43 are formed in the support pieces 44 and 45. The fixed bracket 13 ′ includes a pair of mounting seats 70 on the base 50 ′. A stud bolt 73 to which a nut 71 is fastened is attached to the back side of the mounting seat 70.

  The retainer 30 'is a member obtained by extending leg portions 32', 33 'from the main body 31', and bent portions 34, 34 are provided at the distal ends of the leg portions 32 ', 33'. The positioning bent portion 35 of the first embodiment is not formed on the portion 33 ′. The leg portions 32 'and 33' extend from the main body 31 'with the same width, and the locking piece 36 of the first embodiment does not exist. An insertion portion 72 of a stud bolt 73 is formed at a corner portion between the leg portions 32 ', 33' and the main body 31 '. A nut 71 is fastened to the stud bolt 73 from above the mounting seat 70 of the fixing bracket 13 ′.

  Therefore, when the fuel pump 8 is attached to the fuel tank 1 in this aspect, the primary filter 16, the float 65 and the sender 17 are inserted from above the insertion port 9 of the fuel tank 1, and the fuel pump 8 The lower surface of the annular portion 23 of the upper mounting portion 18 is brought into contact with the pump holding surface 15 of the upper wall 7 of the fuel tank 1.

  Then, after the bent portions 34, 34 of the leg portions 32 ', 33' of the retainer 30 'are inserted and locked in the first openings 42, 43 of the insertion bracket 12', the main body 31 'of the retainer 30' is pushed in. Then, the retainer 30 ′ is curved so as to protrude upward, and the stud bolt protruding from the insertion portions 72, 72 of the mounting seat 70 at the corner portion between the legs 32 ′, 33 ′ of the retainer 30 ′ and the main body 31 ′. The nuts 71 and 71 may be fastened to 73 and 73.

  The fuel pump 8 is detachably attached to the fuel tank 1 through the retainers 30 and 30 'described above. As shown in FIGS. 9 to 12, the fuel pump 8 has a fuel pump at the lower end. A fuel pump body 8A having a cylindrical fuel suction port 67 extending in the direction of the eight axial lines PJ is provided.

  The fuel pump 8 includes an upper mounting portion 18, a cylindrical sender body 64 that covers the bottom surface of the fuel pump body 8 </ b> A and is detachably attached to the periphery of the fuel pump body 8 </ b> A, and the fuel pump 8 from the sender body 64. The arm portion 68 extending in the radial direction and the sender 17 including the detection portion 69 at the tip of the arm portion 68 are provided. The fuel pump 8 includes a primary filter 16 including a connecting portion 74 attached to the fuel suction port 67 of the fuel pump main body 8A and a filter portion 75 extending from the connecting portion 74 in the radial direction of the fuel pump main body 8A. Yes.

  The primary filter 16 is detachably attached to the fuel suction port 67 of the fuel pump main body 8A via a connection portion 74, and the extending direction of the filter portion 75 of the primary filter 16 and the extending direction of the arm portion 68 of the sender 17 are determined. They are set in the same direction. Further, the extension length of the arm portion 68 of the sender 17 and the extension length of the filter portion 75 of the primary filter 16 are set to be substantially the same length. In FIG. 9, a float 65 is supported on the sender 17 via an arm 66 so as to be swingable.

  Specifically, as shown in FIGS. 10 and 12, the primary filter 16 includes a cylindrical connection portion 74 on the upper surface 76 of the filter portion 75. The connecting portion 74 includes a stepped portion 77 inside, and the stepped portion 77 is continuous with the communication hole 78. On the outer peripheral surface 79 of the connecting portion 74, a pair of claw portions 80 that engage with a cylindrical sender main body 60 that is integral with the fuel pump main body 8 </ b> A are arranged in a direction along the extending direction of the arm portion 68 of the primary filter 16 and the sender 17. Is provided. The claw portions 80, 80 are provided with an inclined surface 81 inclined in a direction downward in the direction of the axis J of the connection portion 74 with respect to the insertion direction of the fuel pump main body 8 A into the fuel suction port 67, and are formed in a right triangle shape in a side view. ing.

  As shown in FIGS. 10 and 11, the fuel inlet 67 of the fuel pump main body 8 </ b> A is a cylindrical member that protrudes through the bottom wall 82 of the sender main body 64 of the sender 17, and an O-ring 83 is formed on the outer peripheral surface 84. In the mounted state, it is fitted inside the connecting portion 74 of the primary filter 16 and hits the bottom surface 85 of the stepped portion 77. The O-ring 83 is in close contact with the inner peripheral surface 86 of the connecting portion 74 of the primary filter 16 and the outer peripheral surface 84 of the fuel suction port 67 to seal between them. Here, the fuel suction port 67 is provided eccentric from the center of the fuel pump main body 8A toward the sender 17 side.

  The bottom wall 82 of the sender body 64 of the sender 17 is paired along the direction orthogonal to the extending direction of the arm 68 of the primary filter 16 and the sender 17 so that the primary filter 16 contacts the outer peripheral surface 79 of the connecting portion 74. Locking walls 87, 87 are provided. Each locking wall 87 is provided with an engagement hole 88 that receives and locks the claw portion 80 of the connection portion 74 of the primary filter 16. Accordingly, when the connecting portion 74 of the primary filter 16 is inserted into the fuel suction port 67 of the fuel pump main body 8A from the outside, the primary filter 16 is fixed to the fuel pump main body 8A.

  According to the first embodiment, in order to replace or maintain the primary filter 16, if the retainer 30, 30 ′ is removed and the fuel pump 8 is removed from the fuel tank 1, the primary filter 16 is attached to the fuel pump body 8A. Since it is detachable, the primary filter 16 can be replaced. Further, since the extending direction of the filter portion 75 of the primary filter 16 is set in the same direction as the extending direction of the arm portion 68 of the sender 17, and the lengths of both are set to be approximately the same length, maintenance of the primary filter 16 and After the replacement, the operation of inserting the fuel pump 8 into the fuel tank 1 can be performed from one side, so that the operation can be easily performed.

In addition, each claw portion 80 of the connection portion 74 of the primary filter 16 is engaged with each engagement hole 88 of the engagement wall 87 of the fuel intake port 67 of the fuel pump body 8A, and the connection portion 74 is connected to the fuel intake port 67. Since the primary filter 16 can be fixed, the primary filter 16 can be fixed to the fuel pump main body 8A with one touch.
Here, since the claw portion 80 is provided with the inclined surface 81, the claw portion 80 can be smoothly inserted into the engaging hole 88 of the locking wall 87 and engaged by being guided by the inclined surface 81 with a small force. .

  Next, a second embodiment of the present invention will be described based on FIG. 13 with reference to FIGS. In this embodiment, the locking wall 87 on the sender 17 side of the locking walls 87 and 87 of the first embodiment is extended from the peripheral wall 91 of the sender body 64 to the protruding end of the other locking wall 87 with a long span. The locking wall 90 is formed in an L shape. An engagement hole 88 is formed in the vertical wall of the locking wall 90 at a position corresponding to the locking wall 87. Here, the fuel suction port 67 is eccentrically arranged on the sender 17 side by the amount that the locking wall 90 is provided on the outer side.

  Also in this embodiment, the claw portions 80, 80 of the connecting portion 74 of the primary filter 16 are engaged with the engagement holes 88, 88 of the locking wall 87 and the locking wall 90, so that the primary filter can be easily achieved with one touch. 16 can be fixed to the fuel pump main body 8A, and when the primary filter 16 is removed, the bending allowance can be ensured by a length corresponding to the extension of the locking wall 90, so that the primary filter 16 can be easily removed. Since other configurations and operations are the same as those in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

Next, a third embodiment of the present invention will be described based on FIGS. 14 and 15 with reference to FIGS. In this embodiment, in place of the locking walls 87, 87 of the first embodiment, the outer peripheral surface 79 of the connecting portion 74 of the primary filter 16 is arranged in the radial direction of the fuel pump main body 8A, specifically in the radial direction of the fuel pump main body 8A. A flange portion 93 having a bolt insertion hole 94 extending toward the center of the fuel pump, and a bottom surface of the fuel pump main body 8A corresponding to the flange portion 93, which is the bottom wall 82 of the sender main body 64 in this embodiment, is a fuel intake. A mounting seat 95 having a fastening hole 96 is provided on the outer periphery of the mouth 67. Here, the flange portion 93 extends to a position where the bolt insertion hole 94 protrudes from the side edge of the filter portion 75.
A bolt 97 is inserted into the fastening hole 96 and the bolt insertion hole 94 to fasten the flange portion 93 to the mounting seat 95, and the primary filter 16 is attached to the fuel pump body 8A.
Here, the fuel suction port 67 is provided eccentric from the center of the fuel pump main body 8A toward the sender 17 side.

  Also in this embodiment, the primary filter 16 can be easily attached to and detached from the fuel pump main body 8A using the bolt 97, and the bolt 97 is located near the center of the fuel pump main body 8A, so that the bolt 97 is attached and removed. Work becomes easier. Of course, as shown in FIG. 15, the extension direction of the filter portion 75 of the primary filter 16 is set to the same direction as the extension direction of the arm portion 68 of the sender 17 as in the above-described embodiment, and the lengths of both are set. Since the lengths are set to be substantially the same, the insertion work from the insertion port 9 of the fuel tank 1 of the fuel pump 8 can be performed from one direction side, and the work becomes easy. Since other configurations and operations are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

  Next, a fourth embodiment of the present invention will be described based on FIGS. 16 to 18 with reference to FIGS. In this embodiment, in the embodiment shown in FIG. 10, the positions of the fuel inlet 67 and the locking walls 87, 87 of the fuel pump main body 8A are offset from the center of the fuel pump main body 8A to the side opposite to the sender 17. It is.

Therefore, according to this embodiment, as shown in FIG. 17, each claw portion 80 of the connection portion 74 of the primary filter 16 is engaged with the engagement hole 88 of each locking wall 87 of the fuel suction port 67 of the fuel pump body 8A. In a state where the connecting portion 74 is fixed to the fuel suction port 67 while being locked, the outward protrusion of the primary filter 16 from the fuel pump main body 8A can be minimized.
Therefore, as shown in FIG. 18, the primary filter 16 is obstructed during the insertion operation from the insertion port 9 of the fuel tank 1 of the fuel pump 8 by the amount by which the amount of protrusion of the filter portion 75 of the primary filter 16 is reduced. Therefore, it becomes easy to perform the insertion work. Since other configurations and operations are the same as those in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

Next, a fifth embodiment of the present invention will be described based on FIGS. 19 and 20 with reference to FIGS. In this embodiment, as in the fourth embodiment, the position of the fuel intake port 67 of the fuel pump main body 8A is eccentric from the center of the fuel pump main body 8A to the side opposite to the sender 17. Further, the primary filter 16 is disposed offset to one side with respect to a line L connecting the center of the fuel pump main body 8A and the fuel suction port 67, and the fuel is connected to the connecting portion 74 of the primary filter 16 on the other side. A flange portion 93 fixed to the pump body 8A is provided in such a manner that the bolt insertion hole 94 is positioned at a position extending in the direction perpendicular to the line L and extending outward from the outer edge of the primary filter 16. A mounting seat 95 is provided on the bottom wall 82 of the sender body 64 so as to correspond to the flange portion 93.
Then, the connecting portion 74 of the primary filter 16 is attached to the fuel suction port 67 of the fuel pump main body 8A via the O-ring 83, and the bolt insertion hole provided in the flange portion 93 in the fastening hole 96 of the mounting seat 95 of the sender main body 64. 94, the bolt 97 is inserted here, and the flange part 93 is fastened to the mounting seat 95, and the primary filter 16 is fixed to the fuel pump main body 8A.

  Therefore, according to this embodiment, since the position of the fuel inlet 67 of the fuel pump main body 8A is eccentric from the center of the fuel pump main body 8A to the side opposite to the sender 17, as in the fourth embodiment, the primary filter The amount of overhang of the 16 filter portions 75 is reduced, and the insertion work is facilitated without the primary filter 16 getting in the way when the fuel pump 8 is inserted from the insertion port 9 of the fuel tank 1.

  In addition, the primary filter 16 is arranged offset to one side with respect to a line L connecting the center of the fuel pump main body 8A and the fuel suction port 67, and is connected to the connecting portion 74 of the primary filter 16 on the other side. Since the flange portion 93 fixed to the fuel pump body 8A extends in a direction perpendicular to the line L and extends outward from the outer edge of the primary filter 16, a bolt insertion hole 94 is provided in that portion. It is easy to perform work without being disturbed by the filter 16.

  Therefore, even if it is a structure which suppresses the overhang | projection of the primary filter 16, the attachment structure by the flange part 93 is employable, without using the locking wall 87 like FIG. 16 of 4th Embodiment. Since other configurations and operations are the same as those in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

  Next, a sixth embodiment of the present invention will be described based on FIG. 21 with reference to FIGS. In this embodiment, as represented by the first embodiment, the claw portion 80 provided in the connection portion 74 of the primary filter 16 is improved. 21A is a front view of the connecting portion 74 having the improved claw portion 80A, FIG. 21B is a plan view of FIG. 21A, and FIG. 21C is a side view. This embodiment can be applied not only to the first embodiment but also to all embodiments including the claw portion 80 described above.

  As shown in FIG. 21A, the claw portion 80A is formed with an inclined surface 81A when viewed from the side, like the claw portion 80 of the first embodiment shown in FIG. As shown in FIG. 21 (b), the height gradually increases from the outer peripheral surface 79 of the connecting portion 74 along one direction of the peripheral surface of the connecting portion 74 (in this embodiment, in the counterclockwise direction) as viewed from above. A tapered surface 98 is formed.

  According to this embodiment, since the claw portion 80A is provided with the inclined surface 81A, the claw portion 80A is smoothly guided by the upward force on the engaging hole 88 of the locking wall 87 so as to be guided by the inclined surface 81A. Therefore, the primary filter 16 can be easily fixed to the fuel pump body 8A, and when the primary filter 16 is removed from the fuel pump body 8A, the primary filter 16 is rotated clockwise in FIG. Since the claw portion 80A can be removed from the engagement hole 88 of the locking wall 87 in the horizontal direction along the tapered surface 98, the primary filter 16 can be easily removed from the fuel pump main body 8A.

Next, a seventh embodiment of the present invention will be described based on FIG. 22 with reference to FIGS. 1 to 10 and FIGS. 21 (a) and 21 (b).
In this embodiment, the arm portion 68 of the sender 17 of the first embodiment shown in FIG. 10 having the claw portion of FIG. 22 is extended from an elastic material that extends to a position that interferes with the turning trajectory when the primary filter 16 is attached. A stopper arm 99 (such as rubber) is provided.
The stopper arm 99 is in a state where the claw portions 80A of the connecting portion 74 of the primary filter 16 are engaged with the engagement holes 88 of the locking walls 87 disposed on both sides of the fuel suction port 67 of the fuel pump body 8A. It abuts against the side edge of the filter portion 75 of the filter 16 to restrict the rotation of the primary filter 16 in one direction (right direction in FIG. 21B).

According to this embodiment, the primary filter 16 is inserted into the fuel suction port 67 and then rotated clockwise until it comes into contact with the stopper arm 99, so that the primary filter 16 can be properly fitted into the engagement hole 88. It can be attached to the position and work is easy.
Further, when removing the primary filter 16 from the fuel pump main body 8A, if the primary filter 16 is further rotated clockwise, the stopper arm 99 is elastically deformed to allow the rotation of the primary filter 16, so that the primary filter 16 is rotated. Since the claw portion 80A presses the edge of the engagement hole 88 by the taper surface 98 of the claw portion 80A and pushes the locking wall 87 from the point in time, the claw portion 80A easily disengages from the engagement hole 88, and the primary filter 16 is removed. It can be easily removed from the fuel pump body 8A. Since other configurations and operations are the same as those in the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted.

  Next, an eighth embodiment of the present invention will be described based on FIGS. 23 to 25 with reference to FIGS. In this embodiment, as represented by the first embodiment, the connection structure by the claw portion 80 between the connection portion 74 of the primary filter 16 and the fuel suction port 67 of the fuel pump body 8A is improved. Therefore, this embodiment is applicable to a plurality of embodiments having the above-described mounting structure.

  As shown in FIGS. 23 and 24, an annular flange portion 100 is provided on the outer peripheral surface 84 of the fuel inlet 67A of the fuel pump main body 8A. On the other hand, the connecting portion 74A of the primary filter 16 is provided with an annular peripheral wall portion 102 along the outer peripheral surface 79 at the upper end edge 101 of the connecting portion 74 of the first embodiment shown in FIG. Are provided with four extended claw portions 103 at regular intervals. The extension claw portion 103 is engaged with the annular flange portion 100 of the fuel inlet 67A, and on the lower side of the annular flange portion 100, the upper edge 101 of the connecting portion 74A, the inner surface of the peripheral wall portion 102, and the outer peripheral surface of the fuel inlet 67A. A mounting portion for the O-ring 83 is formed between the two and 84.

  As shown in FIG. 25, the outer peripheral surface 104 of the annular flange portion 100 is provided with a tapered protrusion 105 whose upper surface gradually increases toward one direction (left direction) in the circumferential direction of the annular flange portion 100. The protruding portion 105 is positioned between the plurality of extending claw portions 103. The height of the protruding portion 105 is set to a height at which the extended claw portion 103 is detached from the annular flange portion 100 when the extended claw portion 103 reaches the highest portion.

  Therefore, according to this embodiment, the primary filter 16 can be positioned in the circumferential direction with respect to the fuel pump main body 8A, and when removing the primary filter 16, the primary filter 16 is rotated clockwise as viewed from above. , The back surfaces of the extended claw portions 103,... Ride on the protruding portion 105 and gradually open, so that the extended claw portion 103 is released from the locked state with respect to the annular flange portion 100, and the primary filter 16 is easily fueled. It can be removed from the pump body 8A.

In addition, this invention is not restricted to the said embodiment, For example, it can apply to the fuel tank of various vehicles other than the fuel tank of a motorcycle.
Further, the case where the engaging portion of the primary filter 16 is fixed to the locking wall 87 and the mounting seat 95 of the sender body 64 has been described as an example, but the locking wall 87 and the mounting of the primary filter 16 to the fuel pump body 8A are described. A seat 95 may be provided to fix the primary filter 16 to the fuel pump body 8A.

1 Fuel tank 8A Fuel pump body 17 Sender 64 Sender body (Sender body)
67, 67A Fuel intake port 68 Arm portion 69 Detection portion 74, 74A Connection portion 75 Filter portion 80 Claw portion (engagement portion)
82 Bottom wall (bottom)
93 Flange portion 94 Bolt insertion hole 96 Fastening hole 97 Bolt 98 Tapered surface 99 Stopper arm 100 Annular flange portion 103 Extension claw portion (locking claw)
105 Projection J Axis PJ Axis L Line

Claims (10)

  A fuel pump body that is detachably attached to the fuel tank and has an axially extending fuel inlet at its end, and a sender that has a detecting portion on an arm that extends radially from the fuel pump body. A fuel pump structure comprising a primary filter having a connection part attached to a fuel inlet of the fuel pump body and a filter part extending radially from the connection part, wherein the primary filter is the fuel pump body The fuel suction port is detachably attached via the connecting portion, and the extending direction of the filter portion of the primary filter and the extending direction of the arm portion of the sender are set in the same direction. And fuel pump structure.   The primary filter includes an engagement portion that engages with the fuel pump main body or the sender, and the connection portion of the primary filter is connected to the fuel suction port of the fuel pump main body, thereby engaging with the fuel pump main body or the sender. The fuel pump structure according to claim 1, wherein the fuel pump structure is fixed together.   The connecting portion of the primary filter includes a flange portion extending in a radial direction of the fuel pump main body, a bolt insertion hole is provided in the flange portion, and a main body of the sender covering the bottom surface of the fuel pump main body is The fastening hole provided in the outer periphery of the fuel inlet port is provided, The said primary filter is attached to the said fuel-pump main body with a volt | bolt through the said bolt penetration hole and the said fastening hole. Fuel pump structure.   2. The fuel pump holding structure according to claim 1, wherein an extension length of the arm portion of the sender and an extension length of the filter portion of the primary filter are set to be substantially the same length.   The fuel suction port is provided eccentrically from the center of the fuel pump main body toward the sender side, and extends to the center of the fuel pump main body at the connection portion of the primary filter, and is connected to the fuel pump main body or the main body of the sender. The fuel pump structure according to claim 1, further comprising a fixed flange portion.   The fuel suction port is eccentric to the side opposite to the sender, and the primary filter is disposed on one side of a line connecting the center of the fuel pump body and the fuel suction port, and on the other side. 2. The fuel pump structure according to claim 1, wherein a flange portion fixed to the fuel pump main body is provided at the connection portion.   The engaging portion is a claw portion that is inclined in a direction descending in the insertion direction in the axial direction of the connection portion, and the claw portion includes a tapered surface along one direction of the peripheral surface of the connection portion. The fuel pump structure according to claim 2.   The fuel pump structure according to claim 7, wherein a stopper arm made of an elastic material that restricts the rotation of the primary filter in one direction is provided from the arm portion of the sender.   An annular flange portion is provided in the fuel suction port, and the connection portion of the primary filter includes a plurality of locking claws that are locked to the annular flange portion when the primary filter is attached. Item 2. A fuel pump structure according to Item 1.   A tapered protrusion having an upper surface that gradually increases in one circumferential direction of the annular flange is provided on the outer peripheral surface of the annular flange, and the protrusion is located between the plurality of locking claws. The fuel pump structure according to claim 9.

Images