WO2011096520A1 - 燃料供給装置 - Google Patents

燃料供給装置 Download PDF

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Publication number
WO2011096520A1
WO2011096520A1 PCT/JP2011/052385 JP2011052385W WO2011096520A1 WO 2011096520 A1 WO2011096520 A1 WO 2011096520A1 JP 2011052385 W JP2011052385 W JP 2011052385W WO 2011096520 A1 WO2011096520 A1 WO 2011096520A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
suction
engagement
fuel pump
engaging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/052385
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
山本　敏之
淳 宮木
橋本　清
正樹 上野
鈴木　祥介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Mitsuba Corp
Original Assignee
Honda Motor Co Ltd
Mitsuba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd, Mitsuba Corp filed Critical Honda Motor Co Ltd
Priority to BR112012019303-1A priority Critical patent/BR112012019303B1/pt
Priority to EP11739868.5A priority patent/EP2532876B1/en
Priority to CN201180007981.7A priority patent/CN102782299B/zh
Publication of WO2011096520A1 publication Critical patent/WO2011096520A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/103—Mounting pumps on fuel tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B01D35/0273—Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/26—Filters with built-in pumps filters provided with a pump mounted in or on the casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/44—Filters structurally associated with pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/50—Filters arranged in or on fuel tanks

Definitions

  • the present invention relates to a fuel supply apparatus.
  • This application claims priority based on Japanese Patent Application No. 2010-023478 filed in Japan on February 4, 2010, the contents of which are incorporated herein by reference.
  • a fuel pump of this type of fuel supply apparatus is provided with a pump portion on the bottom side of the fuel tank that pumps up fuel and pumps it to an internal combustion engine (engine).
  • a motor unit for driving the pump unit is provided above the pump unit, and a suction filter (filter) is assembled below the pump unit via a fuel suction port (fuel suction unit). The suction filter prevents the foreign matter in the fuel tank from entering the pump unit by filtering the fuel pumped up by the pump unit.
  • a pipe connectable to the fuel suction part is provided, and a protrusion provided near the suction port of the pump part of the fuel suction part is integrally formed on the outer peripheral surface of the pipe.
  • a technique for fixing to a flanged portion via a metal bracket is disclosed (see Patent Document 1).
  • the metal bracket is provided with an engagement hole into which the protrusion can be inserted.
  • a plurality of claws are formed on the periphery of the engagement hole. These claws have a role of preventing protrusions when the protrusions are inserted into the engagement holes.
  • the flange portion is formed with a mounting hole at a portion corresponding to the engagement hole.
  • the metal bracket is caulked and fixed to the flange portion using a jig in a state where the attachment hole of the flange portion and the engagement hole of the metal bracket are overlapped.
  • the assembling workability of the suction filter is improved by fixing the protrusion of the pump part via the metal bracket.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a fuel supply device that can easily assemble and remove a suction filter without increasing the number of parts. To do.
  • a fuel supply apparatus includes a fuel pump that is disposed in a fuel tank, pumps up fuel in the fuel tank, and pumps the fuel to an internal combustion engine, and the fuel pump of the fuel tank.
  • a fuel pump unit having a holder portion fixed to an inner wall surface; and a suction filter attached to a fuel suction portion provided in the fuel pump unit and configured to filter the fuel sucked into the fuel pump.
  • a filter having a connecting portion projecting toward the fuel pump unit and connected coaxially to the fuel suction portion; both the fuel pump unit and the connection portion with respect to the suction portion; When the connection part is rotated around its axis while the connection part is connected, the connection part cooperates with each other to maintain the connection state of the connection part. Means is provided.
  • each of the fuel suction portion and the connection portion has a tubular shape, and the connection portion is connected to the fuel suction portion; A first engagement portion provided on the outer peripheral surface of the portion, and a second engagement portion formed on the fuel pump unit and receiving and engaging the first engagement portion from the circumferential direction. Also good.
  • the first engagement portion extends in a circumferential direction of the connection portion and is elastically deformable, and further from the second engagement portion. You may provide the permite
  • the protrusion is disposed at an intermediate position in the longitudinal direction of the first engagement portion;
  • the input portion may be configured to receive an external force when the first engagement portion is elastically deformed.
  • At least one of the input portions is radially outward from an outer peripheral surface of the fuel pump unit in a state where the connection portion is connected to the fuel suction portion. It may be protruding.
  • the fuel supply device is provided on either the outer peripheral edge of the connection portion on the fuel pump unit side or the fuel pump unit.
  • a pair of the first engagement portions are provided at positions that are point-symmetric about the axis of the connection portion, and each of the first engagement portions
  • the projections are provided on the radially inner surface side of each of the projections; the front side surface of each projection in the rotation direction is orthogonal to the rotation direction or forms a first inclined surface that is inclined in the rotation direction toward the radially inner side.
  • a pair of the second engaging portions are provided in the fuel pump unit; a recess for receiving the first engaging portions is formed on a proximal end side of each of the second engaging portions; A retaining wall for restricting the first engaging portion inserted in the concave portion from coming off in the axial direction is formed on the distal end side of the two engaging portions;
  • the side surface on the side that accepts the joint is orthogonal to the rotational direction or outward in the radial direction.
  • the follow the rotational direction may form a second inclined surface inclined toward the opposite side.
  • connection portion of the suction filter is coaxially connected to the fuel suction portion provided in the fuel pump unit, and the connection portion is rotated around its axis.
  • the fuel suction part and the connection part cooperate with each other to maintain the connection state of the connection part. For this reason, when assembling the connection part of the suction filter to the fuel intake port, it is not necessary to separately prepare a member for fixing the suction filter such as a metal bracket, and the number of parts can be reduced. Further, since the suction filter is directly assembled to the fuel intake port, it is possible to easily assemble and remove the suction filter without using a jig. Therefore, the workability of assembling the suction filter into the fuel inlet can be improved.
  • the first engaging portion is turned to the second engaging portion by turning the connecting portion around the axis while the connecting portion is connected to the fuel suction portion. Can be easily engaged. Moreover, since the fixing means can have a simple structure, the manufacturing cost of the fuel supply device can be reduced.
  • the first engaging portion since the first engaging portion extends in the circumferential direction of the tubular connecting portion, the first engaging portion is engaged with the second engaging portion. Even if it is formed with a length necessary for matching, the first engaging portion does not protrude in the axial direction. For this reason, the length of the connecting portion in the axial direction can be suppressed. In addition, since the first engagement portion is provided with a protrusion that restricts the second engagement portion from coming off, it is possible to reliably prevent the fuel suction portion from falling off the connection portion.
  • the portion of the first engagement portion on the tip end side relative to the protrusion receives an external force when the first engagement portion is elastically deformed radially outward. It has an input section.
  • the input portion acts as a force point for elastically deforming the first engagement portion, and is positioned at a position farther from the fulcrum than the protrusion that is the action point. For this reason, by applying an external force that is smaller than the case where the external force is applied directly to the input portion using the protrusion as a power point, the first engagement portion can be elastically deformed and the protrusion can be separated from the second engagement portion. Thereby, the engagement state of a 1st engagement part and a 2nd engagement part can be cancelled
  • At least one of the input portions protrudes from the outer peripheral surface of the fuel pump unit from the radially outer side in a state where the connection portion is connected to the fuel suction portion. Therefore, it is easy to apply an external force to the input unit. For this reason, the suction filter can be assembled more easily, and the removal workability can be improved.
  • the circumferential size of the groove is set so as to allow the rotation of the misassembly prevention convex portion around the axis to a predetermined range. ing. For this reason, when the connection portion is not attached to the fuel suction portion in a predetermined direction, the misassembly prevention convex portion is not fitted into the groove portion. As a result, when the suction filter is assembled, the first engagement portion of the connection portion is not externally fitted until it is located at a position where it can be completely connected to the second engagement portion of the fuel suction portion. Assembly can be prevented.
  • the front side surface in the rotation direction of the protrusion may contact the retaining wall of the second engagement portion.
  • the force toward the radially outer side does not act on the first engaging portion. That is, the front side surface in the rotation direction of the protrusion of the first engagement portion forms a first inclined surface that is orthogonal to the rotation direction or is inclined in the rotation direction toward the inner side in the radial direction.
  • the side surface on the side of receiving the first engaging portion forms a second inclined surface that inclines toward the opposite side to the rotation direction as it goes orthogonal to the rotation direction or radially outward.
  • the first engaging portion can be prevented from elastically deforming radially outward. As described above, it is possible to prevent the protrusion of the first engagement portion from climbing on the tip of the second engagement portion, and it is possible to reliably prevent erroneous assembly of the connection portion.
  • FIG. 1 It is a perspective view showing a schematic structure of a fuel supply device in a first embodiment of the present invention. It is a perspective view which shows schematic structure of the lower cup in the embodiment. It is a perspective view which shows schematic structure of the suction filter in the embodiment. It is explanatory drawing which shows the state which attached the suction filter to the lower cup in the embodiment. It is explanatory drawing which shows the state which attached the suction filter to the lower cup in the embodiment. It is explanatory drawing which shows the state which attached the suction filter to the lower cup in the embodiment incorrectly. It is a perspective view which shows schematic structure of the connecting pipe in 2nd embodiment of this invention. It is a perspective view which shows schematic structure of the holder part in the embodiment.
  • FIG. 1 is a perspective view of the fuel supply device 1. As shown in the figure, the fuel supply device 1 is immersed in a fuel in a fuel tank 2 such as an automobile or a motorcycle, and the fuel is pumped up and pumped to an internal combustion engine (not shown).
  • the fuel supply device 1 includes a fuel pump unit 30 and a suction filter 28 disposed on the suction side of the fuel pump unit 30. In the following description, the suction side of the fuel pump unit 30 is the lower side, and the opposite side is the upper side.
  • the fuel pump unit 30 includes a fuel pump 3 and a holder portion 4.
  • the fuel pump 3 includes a pump part P disposed on the lower side and a motor part M attached on the upper side of the pump part P.
  • As the pump part P for example, a non-volume regenerative pump having an impeller is used and driven by the motor part M.
  • As the motor part M for example, a DC motor with a brush is used.
  • a fuel suction portion (suction pipe) 7 is provided below the pump portion P, and fuel is pumped into the fuel pump 3 from this point.
  • a discharge port 8 is provided on the upper side of the motor unit M. The fuel that has passed through the motor part M is pumped from the discharge port 8 to the outside of the fuel pump 3.
  • the holder portion 4 includes a flange unit 9 fixed to the upper wall 2 a of the inner wall surface of the fuel tank 2, an upper cup 10 that is provided below the flange unit 9 and covers the outside of the fuel pump 3, and the upper The lower cup 20 is attached to the cup 10 and covers the lower side of the fuel pump 3.
  • the flange unit 9 is provided with a substantially disc-shaped unit body 11 made of resin.
  • the unit main body 11 is fixed to the upper wall 2a in a state of being inserted from the outside (upper side) of the fuel tank 2 into an opening (not shown) formed in the upper wall 2a of the fuel tank 2. Therefore, the upper surface of the flange unit 9 is exposed to the outside of the fuel tank 2.
  • the flange unit 9 is provided with a discharge port 8 of the fuel pump 3 and a fuel take-out pipe 12 communicating with the discharge port 8. That is, the fuel in the fuel tank 2 is pumped from the discharge port 8 to the internal combustion engine through the fuel take-out pipe 12.
  • the flange unit 9 is provided with, for example, a check valve and a pressure regulator between the tip of the fuel take-out pipe 12 and the discharge port 8 so that a predetermined fuel pressure can be secured.
  • a connector (not shown) is provided on the upper surface of the flange unit 9.
  • the connector is fitted with an external connector connected to an external power source.
  • This connector is electrically connected to the motor part M of the fuel pump 3 and the sender gauge 23, and the motor part M is thereby driven.
  • a recess 13 is formed in the central region of the lower surface of the unit body 11, and the upper cup 10 is formed integrally with the recess 13.
  • the upper cup 10 is provided with a cylindrical cup body 14 made of resin or the like.
  • the cup body 14 is formed so as to cover the outer peripheral surface of the fuel pump 3, and is formed so that the fuel pump 3 can be inserted from an opening 14 a formed at the lower end of the cup body 14. ing. Further, the outer peripheral surface 14 b of the cup body 14 extends from the flange unit 9 to the substantially axial center of the fuel pump 3.
  • the cup body 14 has four engagement pieces 17 extending from the periphery of the opening 14a toward the lower side in the axial direction of the opening 14a at equal intervals in the circumferential direction of the opening 14a.
  • the engaging piece 17 is formed so as to be elastically deformable toward the outer side in the axial direction of the cup body 14, and is mechanically held by being caught by the lower cup 20 by this elastic force.
  • the engaging piece 17 extends below the motor part M of the fuel pump 3. Further, the engagement hole 19 of the engagement piece 17 is engaged with an engagement projection 18 formed in a lower cup 20 described later.
  • FIG. 2 is a perspective view of the lower cup 20.
  • the bottomed cylindrical lower cup 20 made of resin or the like is disposed below the fuel pump 3 to support the fuel pump 3.
  • the outer diameter of the outer peripheral surface 20a of the lower cup 20 is formed to be slightly smaller than the inner diameter of the outer peripheral surface 14b of the upper cup 10 (cup body 14).
  • an engagement convex portion 18 that can be engaged with the engagement hole 19 of the engagement piece 17 is formed.
  • the lower cup 20 is held by the upper cup 10 by the engagement projection 18 engaging with the engagement hole 19.
  • the fuel pump 3 is supported by the integrated upper cup 10 and lower cup 20.
  • an end portion (bottom portion) 20b is provided below the lower cup 20.
  • a support plate 21 that extends outward in the radial direction of the lower cup 20 is integrally formed with the end portion 20b.
  • a gauge mounting plate 22 is integrally formed at the tip of the support plate 21 so as to follow the axial center direction of the lower cup 20.
  • the gauge attachment plate 22 is provided with a sender gauge 23.
  • the sender gauge 23 is a liquid level gauge that detects the remaining amount of fuel in the fuel tank 2, that is, a liquid level position.
  • the sender gauge 23 is formed in a box shape and is rotatable with respect to the gauge body 24.
  • a float 35 provided at the tip of the swing arm 34 and capable of floating on the liquid level of the fuel.
  • a deaeration hole 27 is formed at a position closer to the support plate 21 than the center of the end portion 20b so as to penetrate the end portion 20b. Through this deaeration hole 27, the fuel vapor generated in the fuel pump 3 is discharged.
  • a cover 27 a that regulates the discharge direction of the fuel vapor discharged from the deaeration hole 27 is integrally formed with the end portion 20 b so as to surround the deaeration hole 27.
  • a through hole 26 is formed in the end portion 20b at a position corresponding to the suction pipe 7 of the fuel pump 3 so as to penetrate the end portion 20b.
  • the diameter of the through hole 26 is formed such that the suction pipe 7 can be inserted.
  • the suction pipe 7 is inserted through the through hole 26 and protrudes downward.
  • An O-ring 25 is fitted into the opening end surface 7b at the base of the portion of the suction pipe 7 that protrudes from the through hole 26.
  • a pair of second engaging portions 51 to be described later are provided on the end portion 20 b so as to be point-symmetric with respect to the through hole 26.
  • FIG. 3 is a perspective view of the suction filter 28.
  • the suction filter 28 is provided with a filter medium 36 and a welded portion 37 formed on the outer peripheral edge of the filter medium 36.
  • the filter medium 36 is a non-woven fabric formed in a bag shape, and the welded portion 37 is formed by welding the outer peripheral edge of the filter medium 36.
  • a connection pipe 38 projects upward from a portion of the suction filter 28 corresponding to the suction pipe 7 of the fuel pump 3.
  • the connection pipe 38 is coaxially connected to the suction pipe 7 to allow the filter medium 36 and the suction pipe 7 to communicate with each other, and fixes the suction filter 28 to the lower cup 20.
  • the connecting pipe 38 is made of resin, and the lower opening of the connecting pipe 38 is covered with a filter medium 36.
  • the fuel in the fuel tank 2 flows into the connection pipe 38 through the filter medium 36.
  • the fuel that has flowed into the connection pipe 38 is pumped up by the fuel pump 3.
  • the upper opening of the connecting pipe 38 protrudes upward from the welded portion 37.
  • a portion protruding from the welded portion 37 is a protruding portion 38 a.
  • a misassembly prevention convex portion 46 is formed at one place on the outer peripheral edge 38e on the upper side (tip) of the protruding portion 38a.
  • the inner diameter of the upper opening of the connection pipe 38 is set to a size that can be externally fitted to the suction pipe 7.
  • the inner peripheral surface of the protrusion 38a is reduced in diameter from a position in the middle toward the lower side.
  • a step surface 41a a step provided at the boundary between the reduced diameter region (the reduced diameter portion 41) and the upper side of the reduced diameter portion 41.
  • a pair of elastically deformable first engaging portions (engaging claws) 42 are provided on the outer peripheral surface 38b of the protruding portion 38a slightly above the center of the protruding portion 38a in the axial center 38d direction. Is provided so as to be symmetric with respect to the center.
  • the engaging claw 42 is formed in a substantially square shape in the longitudinal section and in a substantially L shape in the transverse section. If the portion of the outer peripheral surface 38b where the root portion 42a of the engagement claw 42 is provided is a contact 38c, the portion of the engagement claw 42 on the side of the root portion 42a (the rising portion 43) is a tangent ( (Not shown). Further, the engaging claw 42 is bent from the leading end side of the rising portion 43 and extends along the circumferential direction. A portion of the engaging claw 42 that is ahead of the leading end side of the rising portion 43 is referred to as a claw body portion 44.
  • a protrusion 45 that restricts the release from the second engagement portion 51 described later is provided toward the protruding portion 38a and with the claw body portion 44. It protrudes so as to be substantially orthogonal.
  • the front side surface in the rotation direction of each protrusion 45 is formed with a first inclined surface 45b that is inclined in the rotation direction as it is orthogonal to the rotation direction or radially inward.
  • a third inclined surface 45a that is inclined in the counter-rotating direction as it goes inward in the radial direction is formed on the side surface on the axial center 38d side of the side surfaces of each protrusion 45.
  • the portion of the claw main body 44 on the tip side of the projection 45 forms an input unit 61 that receives an external force when the claw main body 44 is elastically deformed.
  • a groove 47 into which the upper end of the connection pipe 38 can be fitted is formed in the end portion 20 b so as to surround the through hole 26.
  • the end portion 20b is formed with a small groove 48 that is substantially arcuate in plan view and into which the projection 46 for preventing misassembly of the connecting pipe 38 can be fitted.
  • the size of the small groove 48 in the circumferential direction is set so that the misassembly preventing convex portion 46 can be rotated by a predetermined range around the axis 7a.
  • the small groove 48 communicates with a central portion of the end portion 20 b in the outer peripheral edge of the groove 47, and a step 48 a is formed at the boundary between the groove 47 and the small groove 48.
  • a pair of second engaging portions 51 project from the outer peripheral edge of the groove 47 of the end portion 20 b so as to be symmetrical with respect to the through hole 26 at a position corresponding to the engaging claw 42.
  • Each second engagement portion 51 is formed so as to be engageable with a pair of engagement claws 42.
  • the second engaging portion 51 is formed integrally with the support portion 52 formed so as to protrude downward from the end portion 20 b, and the tip of the support portion 52, and extends toward the radially outer side of the suction pipe 7. It is comprised from the retaining wall 53 which carries out.
  • the support portion 52 and the retaining wall 53 constitute a receiving recess 54 that can receive each engagement claw 42 from the circumferential direction on the proximal end side of each second engagement portion 51.
  • the connecting pipe 38 is externally fitted to the suction pipe 7 by aligning the position of the projection 46 for preventing misassembly and the position of the small groove 48, and then the connecting pipe 38 is hooked.
  • the claw main body 44 is inserted into the receiving recess 54 of each second engaging portion 51 and fixed as shown in FIG. Is done.
  • the engaging claws 42 and the second engaging portions 51 are used as fixing means for engaging the lower cup 20 and the suction filter 28.
  • the circumferential width W1 of the support portion 52 of the second engagement portion 51 is set to be substantially the same as the distance L1 between the protrusion 45 and the rising portion 43.
  • the tip of the claw body portion 44 of at least one engagement claw 42 of the pair of engagement claws 42. (Input part) 61 will be in the state which protruded to the radial direction outer side rather than the outer peripheral surface 20a of the lower cup 20.
  • the retaining wall 53 of the second engaging portion 51 restricts the upward movement of the engaging claw 42 when the second engaging portion 51 and the engaging claw 42 are engaged, The engagement claw 42 inserted into the recess 54 is prevented from coming off in the direction of the axis 38d.
  • the retaining wall 53 is a flat wall formed in a substantially fan shape in plan view when viewed from above.
  • the side surface that receives the engaging claw 42 is orthogonal to the rotational direction of the suction pipe 7, or faces away from the rotational direction as it goes radially outward.
  • the second inclined surface 53a is inclined at the inclination angle ⁇ .
  • a side surface facing the second inclined surface 53a is defined as a side surface 53b.
  • the radially outer end of the suction pipe 7 is a corner 55, and the radially inner end is an end 53e.
  • the inclination angle ⁇ of the second inclined surface 53a is an angle formed by the intersection of the straight line connecting the axial center 7a and the end 53e of the suction pipe 7 and the second inclined surface 53a.
  • the inclination angle ⁇ is along the first inclined surface 45b (see FIG. 4) of the protrusion 45. Is set.
  • An outer peripheral side surface 53d extends from the corner portion 55 to the side surface 53b.
  • the side surface 53 b is orthogonal to the rotation direction of the suction pipe 7, and the outer peripheral side surface 53 d is bent so as to bulge toward the radially outer side of the suction pipe 7.
  • a round chamfered portion 56 may be formed instead of the corner portion 55 in the region of the boundary between the side surface 53b and the outer peripheral side surface 53d.
  • the above-described opening 57 is formed in the end portion 20b at a position corresponding to the projected portion of the retaining wall 53.
  • FIG. 2 is a diagram illustrating a schematic configuration of the lower cup 20
  • FIG. 3 is a diagram illustrating a schematic configuration of the suction filter 28.
  • 4 to 6 show a state where the connection pipe 38 of the suction filter 28 is attached to the lower cup 20
  • FIGS. 4 and 5 are explanatory views showing a state where the connection pipe 38 is normally assembled. These are explanatory drawings which show the state which connected the connecting pipe 38 incorrectly.
  • the fuel pump 3 is inserted into the cup body 14 (upper cup 10).
  • the lower cup 20 is inserted into the cup body 14 (upper cup 10).
  • the engagement convex portion 18 of the lower cup 20 and the engagement piece 17 of the upper cup 10 are engaged, and the lower cup 20 is held by the cup body 14. Is done.
  • the connecting pipe 38 is fitted onto the suction pipe 7 in a state where the axial center 38 d of the connecting pipe 38 of the suction filter 28 is aligned with the axial center 7 a of the suction pipe 7.
  • the position of each engaging claw 42 of the connection pipe 38 is adjusted so that it will not interfere with each second engaging part 51 protruding from the lower cup 20.
  • the convex portion 46 for preventing misassembly of the connecting pipe 38 is adjusted so as to correspond to the groove portion (small groove) 48 of the lower cup 20. As shown in FIG.
  • the size of the small groove 48 in the circumferential direction is set so as to allow the rotation of the misassembly prevention convex portion 46 about the axis 7 a only within a predetermined range.
  • FIG. 4 shows the counterclockwise rotation direction as an arrow CCW.
  • the third inclined surface 45 a of the protrusion 45 comes into contact with the support portion 52 of the second engagement portion 51. If the connection pipe 38 is further rotated around the axis 7a from here, a radial force acts radially outward on the third inclined surface 45a. As a result, the engaging claw 42 is pushed and expanded outward in the radial direction, and the protrusion 45 rides on the radially outer side surface of the support portion 52.
  • connection pipe 38 When the connection pipe 38 is further rotated around the axis 7 a, the radially inner side surface of the engagement claw 42 gets over the radially outer side surface of the support portion 52. At that time, a restoring force directed radially inward acts on the engaging claw 42, and both circumferential ends of the support portion 52 are formed by the protrusion 45 of the engaging claw 42 and the radially inner side surface of the rising portion 43. Is clamped (see FIG. 5). At this time, the protrusion 45 restricts the engagement claw 42 from moving away from the second engagement portion 51. As a result, the rotation of the connecting pipe 38 around the axis 7a is restricted.
  • connection pipe 38 is fitted and fixed to the suction pipe 7, and the attachment of the suction filter 28 to the lower cup 20 is completed.
  • each engagement claw 42 by applying an external force to both the input portions 61 of each engagement claw 42, the protrusion 45 of each engagement claw 42 is separated from the support portion 52 of each second engagement portion 51, and each second engagement.
  • the engaged state between the portion 51 and the engaging claw 42 is released.
  • the connection pipe 38 is rotated clockwise around the axis 7 a of the suction pipe 7.
  • FIG. 4 shows the clockwise direction of rotation as arrow CW.
  • the engaging claw 42 is pulled out from the receiving recess 54 of the second engaging portion 51.
  • the connecting pipe 38 is removed from the suction pipe 7.
  • the connecting pipe 38 is misassembled into the suction pipe 7 in a state where the position of the mis-assembly preventing convex portion 46 of the connecting pipe 38 is shifted from the position of the small groove 48 of the lower cup 20.
  • the case where it has closed will be described.
  • the connecting pipe 38 is not inserted into the suction pipe 7 to a predetermined depth, and a gap is formed between the end portion 20b and the outer peripheral edge 38e that is the tip of the connecting pipe 38.
  • connection pipe 38 when the connection pipe 38 is rotated around the axis 7a in the arrow CCW direction in a state where there is a gap between the end portion 20b and the outer peripheral edge 38e which is the tip of the connection pipe 38, the first of the protrusion 45
  • the inclined surface 45 b comes into contact with the second inclined surface 53 a of the retaining wall 53.
  • the protrusion 45 of the engaging claw 42 is provided so as to be substantially orthogonal to the claw body 44, and the first inclined surface 45 b is orthogonal to the rotational direction or directed radially inward. According to the direction of rotation.
  • the second inclined surface 53a of the retaining wall 53 is inclined at an inclination angle ⁇ toward the opposite side of the rotation direction as it goes orthogonally to the rotation direction of the suction pipe 7 or toward the radially outer side.
  • the inclination angle ⁇ is set to be along the first inclined surface 45b of the protrusion 45 when the second inclined surface 53a and the protrusion 45 of the engaging claw 42 are present at a position where they overlap in the direction of the axis 7a. Yes.
  • the round chamfered portion 56 is formed instead of the corner portion 55 in the region of the boundary between the second inclined surface 53a and the outer peripheral side surface 53c, the round chamfered portion is formed when the suction filter 28 is erroneously assembled. 56 and the projection 45 of the engaging claw 42 may come into contact with each other, and a force directed radially outward may be applied to the engaging claw 42. For this reason, there is a possibility that the projection 45 rides on the retaining wall 53. That is, the corner portion 55 formed on the second inclined surface 53a of the retaining wall 53 reliably prevents the suction filter 28 from being erroneously assembled, and fails-safe for preventing the suction filter 28 from falling off the lower cup 20. Function as.
  • connection part (connection pipe) 38 of the suction filter 28 is coaxially connected to the fuel suction part (suction pipe) 7 provided in the fuel pump unit 30.
  • the connecting pipe 38 When the connecting pipe 38 is rotated around the axis 7a, the suction pipe 7 and the connecting pipe 38 cooperate with each other to maintain the connected state.
  • a member for fixing the suction filter 28, such as a metal bracket, and the number of parts can be reduced.
  • the suction filter 28 is directly assembled to the suction pipe 7, it is possible to easily assemble and remove the suction filter 28 without using a jig. Therefore, the workability of assembling the connection pipe 38 to the suction pipe 7 can be improved.
  • the suction filter 28 and the connection pipe 38 can be exchanged at the same time. For this reason, for example, compared with the case where the engaging claw 42 is provided in the lower cup 20, it becomes possible to perform the exchange operation
  • the engaging claw 42 is bent from the leading end side of the rising portion 43 extending toward the tangential line (not shown) at the contact 38c and the claw body portion 44 of the rising portion 43 and extends along the circumferential direction. It is comprised from the nail
  • the engagement claw 42 is formed with a length necessary for engaging with the second engagement portion 51, the engagement claw 42 does not protrude in the direction of the axis 38d. For this reason, the length of the connecting pipe 38 (projecting portion 38a) in the axial center 38d direction can be suppressed, and the fuel supply device 1 can be downsized. Further, since the fixing means including the engaging claw 42 and the second engaging portion 51 can have a simple structure, the manufacturing cost of the fuel supply device 1 can be reduced.
  • the engagement claw 42 is provided with the protrusion 45 that restricts the second engagement portion from coming off, so that the engagement state between the engagement claw 42 and the second engagement portion 51 is reliably maintained. can do. For this reason, it is possible to reliably prevent the suction pipe 7 from dropping from the connection pipe 38. That is, the suction filter 28 can be prevented from falling off the lower cup 20.
  • the portion of the engaging claw 42 on the tip side of the protrusion 45 forms an input portion 61 that receives an external force when the engaging claw 42 is elastically deformed radially outward.
  • the input part 61 acts as a power point for elastically deforming the engaging claw 42, and is located at a position farther from the fulcrum (the root portion 42a) than the protrusion 45 which is an action point.
  • the engagement claw 42 is elastically deformed and the projection 45 is separated from the second engagement portion 51. Can do.
  • claw 42 and the 2nd engagement part 51 can be cancelled
  • the input portion 61 of at least one of the engagement claws 42 is the outer peripheral surface of the fuel pump unit 30 (the outer periphery of the lower cup 20). Since it protrudes from the outer side in the radial direction than the surface 20 a), when an external force is applied to each input portion 61, the external force can be easily applied to the protruding portion of the input portion 61. For this reason, the suction filter 28 can be easily assembled, and the removal workability of the suction filter 28 can be improved.
  • a misassembly prevention convex portion 46 is formed on the outer peripheral edge 38e which is the tip of the connecting pipe 38 (projection portion 38a), and the misassembly prevention convex portion 46 can be fitted into the end portion 20b of the lower cup 20.
  • a small groove 48 is formed.
  • the front side surface in the rotation direction of the protrusion 45 of the engaging claw 42 forms a first inclined surface 45b that is orthogonal to the rotation direction or is inclined in the rotation direction toward the inner side in the radial direction.
  • the side surface of the wall that receives the engaging claws 42 forms a second inclined surface 53a that is inclined perpendicularly to the rotation direction or radially outward from the rotation direction. For this reason, even if the first inclined surface 45b and the second inclined surface 53a come into contact with each other and a radial force acts on the second inclined surface 53a from the first inclined surface 45b, this force is In 53a, it acts radially or radially inward. As a result, the engagement claw 42 is prevented from being elastically deformed radially outward.
  • FIG. 7 is a perspective view of the connecting pipe 138 in the present embodiment
  • FIG. 8 is a perspective view of the lower cup 120 in the present embodiment.
  • symbol is attached
  • the fuel supply device 1 includes a fuel pump 3, a holder portion 4 that is fixed to the upper wall 2 a of the fuel tank 2 and supports the fuel pump 3, and a suction filter 28 that is disposed below the fuel pump 3.
  • a support plate 121 protruding outward in the radial direction is integrally formed at a point formed by a bottomed cylindrical lower cup 120 attached to the cup 10 and a region on the end portion 120b side of the outer peripheral surface 120a of the lower cup 120.
  • the small groove 48 into which the misassembly preventing convex portion 46 can be fitted is formed in the end portion 120b of the lower cup 120, which is the same as in the first embodiment described above.
  • a pair of elastically deformable engaging claws 142 are point-symmetric about the axis 138d of the projecting portion 138a in the connecting pipe 138 (projecting portion 138a) of the suction filter 28 in this embodiment. It is provided at such a position. Further, the engaging claw 142 is formed in a substantially L-shaped cross section. That is, when the portion of the outer peripheral surface 138b of the connecting pipe 138 where the root portion 142a of the engaging claw 142 is provided is a contact 138c, the portion of the engaging claw 142 on the root portion 142a side (the rising portion 143) is , Extending in the direction of a tangent (not shown) at the contact 138c.
  • the engaging claw 142 is bent from the tip side of the rising portion 143 and extends along the circumferential direction.
  • a portion of the engaging claw 142 that is ahead of the leading end side of the rising portion 143 is referred to as a claw main body portion 144.
  • An opening 146 is formed in the central area of the nail main body 144 in plan view.
  • a pair of second engaging portions 151 project from the end portion 120 b of the lower cup 120 at locations corresponding to the pair of engaging claws 142.
  • the second engagement portion 151 includes a support wall 152 having an arcuate cross section that can be interposed between the connection pipe 138 and the claw body portion 144, and an engagement convex portion 153.
  • the engagement convex portion 153 protrudes from a portion corresponding to the opening 146 on the radially outer surface of the support wall 152.
  • the engaging convex portion 153 is formed so as to be able to fit into the opening 146 of the claw main body portion 144.
  • the connection pipe 138 is connected to the suction pipe 7 with the axial center 138 d of the upper opening of the connection pipe 138 of the suction filter 128 aligned with the axial center 7 a of the suction pipe 7. Fit externally. At this time, the position of each engaging claw 142 of the connecting pipe 138 is adjusted so as to be a position that does not interfere with each second engaging portion 151 protruding from the lower cup 120. Further, the position of the misassembly prevention convex portion 46 of the connecting pipe 138 is adjusted so as to be a position corresponding to the groove portion (small groove 48) of the lower cup 120.
  • connection pipe 138 is fitted and fixed to the suction pipe 7, and the attachment of the suction filter 28 to the lower cup 120 is completed.
  • the engagement claw 142 can be formed larger than the engagement claw 42 of the first embodiment described above. .
  • the rigidity of the engaging claw 142 can be increased.
  • the contact area between the engaging claw 142 and the second engaging portion 151 can be increased as compared with the first embodiment, the holding force of the connection pipe 138 by the engaging claw 142 can be increased.
  • the structure of the engaging claw 142 and the second engaging portion 151 can be simplified, the manufacturing cost of the fuel supply device 1 can be reduced.
  • the present invention is not limited to the configuration of each of the above-described embodiments, and includes various modifications made to the above-described embodiments without departing from the spirit of the present invention.
  • the connection pipe 38 (138) of the suction filter 28 is externally fitted and fixed to the suction pipe 7 protruding from the end portion 20b (120b) of the lower cup 20 (120) has been described.
  • the fixing method of the suction pipe 7 and the connection pipe 38 (138) is not limited to this, and each configuration is changed so that the connection pipe 38 (138) is fitted and fixed to the suction pipe 7. It doesn't matter.
  • connection pipe 38 (138) When the connection pipe 38 (138) is fitted and fixed to the suction pipe 7, the engaging claw 42 (142) protruding from the connection pipe 38 (138) and the second protrusion protruding from the lower cup 20 (120) are provided.
  • the fixing means instead of the engaging part 51 (151).
  • a long groove in the circumferential direction may be formed on the outer peripheral surface of the suction pipe 7, and a protrusion that can be fitted in the groove of the suction pipe 7 may be formed on the connection pipes 38 and 138.
  • Such a fixing means is not limited to the above-mentioned means.
  • connection pipe 38 (138) When the connection pipe 38 (138) is externally fitted to the suction pipe 7 and then the connection pipe 38 (138) is rotated about the axis, the connection to the suction pipe 7 is established. There is no limitation as long as it engages with the tube 38 (138).
  • the misassembly prevention convex portion 46 is provided at the tip of the connecting pipe 38 (138), and the misassembly prevention convex portion is provided on the end portion 20b (120b) of the lower cup 20 (120).
  • the case where the small groove 48 into which 46 can be inserted has been described.
  • the configuration in which the suction pipe 7 and the connection pipe 38 (138) are engaged is not limited to this, and the misassembly prevention convex part 46 is formed in the end part 20b (120b) of the lower cup 20 (120).
  • channel in which the misassembly prevention convex part 46 can be inserted may be formed in the front-end
  • the radial thickness of the connection pipe 38 (138) may be set to a thickness capable of forming a groove.
  • the pair of engaging claws 42 (142) protrudes from the connecting pipe 38 (138), and the pair of second engaging portions 51 (151) protrudes from the lower cup 20 (120).
  • the number of the engaging claws 42 (142) and the second engaging portions 51 (151) is not limited to this, and at least one engaging claw 42 (142) protrudes from the connecting pipe 38 (138). It is sufficient that at least one second engaging portion 51 (151) is provided on the lower cup 20 (120).
  • Fuel supply apparatus 2 Fuel tank 2a Upper wall 3 Fuel pump 4 Holder part 7 Suction pipe 7 (fuel suction part) 7a Shaft center 20,120 Lower cup 20a, 120a Outer peripheral surface 20b, 120b End part 28 Suction filter 30
  • Fuel pump unit 38 138 Connection pipe (connection part) 38b, 138b outer peripheral surface 38c outer peripheral edge 38d shaft center 42, 142 engaging claw (first engaging portion) 43,143 Standing portion 44,144 Claw body portion 45,145 Protrusion 45b First inclined surface 46 Convex portion (protruding portion for preventing misassembly) 47 Groove 48 Small groove (groove) 51,151 Second engaging portion 52 Support portion 53 Retaining wall 53a Second inclined surface 54 Receiving recess 61,161 Input portion

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Details Of Reciprocating Pumps (AREA)
PCT/JP2011/052385 2010-02-04 2011-02-04 燃料供給装置 Ceased WO2011096520A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR112012019303-1A BR112012019303B1 (pt) 2010-02-04 2011-02-04 dispositivo de abastecimento de combustível
EP11739868.5A EP2532876B1 (en) 2010-02-04 2011-02-04 Fuel supply device
CN201180007981.7A CN102782299B (zh) 2010-02-04 2011-02-04 燃料供给装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010023478A JP5345570B2 (ja) 2010-02-04 2010-02-04 燃料供給装置
JP2010-023478 2010-02-04

Publications (1)

Publication Number Publication Date
WO2011096520A1 true WO2011096520A1 (ja) 2011-08-11

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EP (1) EP2532876B1 (enExample)
JP (1) JP5345570B2 (enExample)
CN (1) CN102782299B (enExample)
BR (1) BR112012019303B1 (enExample)
WO (1) WO2011096520A1 (enExample)

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JP5917419B2 (ja) * 2013-01-15 2016-05-11 愛三工業株式会社 燃料フィルタの取付構造
KR101450622B1 (ko) * 2013-12-05 2014-10-15 주식회사 코아비스 연료펌프용 스트레이너 및 그 제조방법
JP6433011B2 (ja) * 2014-03-28 2018-12-05 株式会社ケーヒン 燃料供給装置
KR101575495B1 (ko) * 2014-06-20 2015-12-08 현대자동차주식회사 차량용 연료 공급시스템
BR112017001508B1 (pt) * 2014-07-25 2022-08-23 Kuss Filtration, Inc. Filtro para fixação em bomba
JP6900352B2 (ja) * 2018-10-11 2021-07-07 株式会社ニフコ 燃料用フィルタ装置
CN109826733A (zh) * 2019-03-27 2019-05-31 众恒汽车部件有限公司 可快速更换滤网的车用油泵

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Also Published As

Publication number Publication date
JP2011163131A (ja) 2011-08-25
EP2532876B1 (en) 2019-01-09
BR112012019303B1 (pt) 2021-01-19
JP5345570B2 (ja) 2013-11-20
BR112012019303A2 (pt) 2018-05-08
CN102782299A (zh) 2012-11-14
EP2532876A4 (en) 2014-05-28
CN102782299B (zh) 2014-11-12
EP2532876A1 (en) 2012-12-12

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