WO2018147031A1 - Structure de montage pour élément de système de combustible - Google Patents

Structure de montage pour élément de système de combustible Download PDF

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Publication number
WO2018147031A1
WO2018147031A1 PCT/JP2018/001396 JP2018001396W WO2018147031A1 WO 2018147031 A1 WO2018147031 A1 WO 2018147031A1 JP 2018001396 W JP2018001396 W JP 2018001396W WO 2018147031 A1 WO2018147031 A1 WO 2018147031A1
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Prior art keywords
component mounting
arm
fuel system
fuel
system component
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PCT/JP2018/001396
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English (en)
Japanese (ja)
Inventor
池谷　昌紀
崇 蟹江
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愛三工業株式会社
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Publication of WO2018147031A1 publication Critical patent/WO2018147031A1/fr

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    • 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

Definitions

  • the present invention relates to a mounting structure for fuel system parts.
  • the fuel supply device that supplies the fuel in the fuel tank to the outside of the fuel tank includes a fuel pump, a fuel filter, a pressure regulating valve, a fuel pipe that connects these, and the like.
  • the conventional example disclosed in Japanese Patent Laid-Open No. 2013-174183 includes a pressure regulating valve having a flange on the outer peripheral portion and a fuel pipe having a component mounting portion that receives and supports the pressure regulating valve.
  • the component mounting portion is formed with a locking projection that protrudes radially outward.
  • a U-shaped elastic engagement piece is formed on the cap that covers the pressure regulating valve.
  • the elastic engagement piece of the cap is engaged with the locking projection of the component mounting portion, that is, snap-fit engaged using elastic deformation.
  • the pressure regulator (26), the fitting part (80), the claw part (82), and the fitting part (88) of Japanese Patent Application Laid-Open No. 2013-174183 are the fuel system parts, the part mounting part, and the locking protrusion of this specification, respectively. Corresponds to an elastic engagement piece.
  • the cap since a cap is necessary, the number of parts and assembly man-hours are increased.
  • an elastic engagement piece is formed in the component attachment portion of the fuel pipe, and the elastic engagement piece is snap-fit engaged with the flange of the pressure regulating valve.
  • the elastic engagement piece functions as a retaining portion for the flange of the pressure regulating valve. The load resistance of the retaining portion is determined by the amount of engagement of the elastic engagement piece with the flange.
  • the engagement amount of the elastic engagement piece with respect to the flange needs to have a predetermined size in order to hold the load due to the fuel pressure acting on the pressure regulating valve.
  • This structure is not practical because the amount of elastic deformation of the elastic engagement piece radially outward becomes excessive. Therefore, conventionally, there is a need for an attachment structure in which the amount of elastic deformation of the retaining portion in the radial direction is small while securing the amount of engagement of the retaining portion with the flange of the fuel system component.
  • the fuel system component mounting structure includes a fuel system component having a flange on the outer peripheral portion and a fuel pipe having a component mounting portion for receiving and supporting the fuel system component.
  • the component mounting portion is formed with a retaining portion for retaining the flange by snap-fit engagement.
  • the retaining portion includes a first arm portion, a connection portion, and a second arm portion.
  • the first arm portion extends axially forward from the component mounting portion and is formed so as to be elastically deformable radially outward.
  • the connecting portion is formed at the tip end portion in the axial direction of the first arm portion.
  • the second arm portion extends rearward in the axial direction from the connection portion, and is formed to be elastically deformable radially outward.
  • An engaging portion that engages with the flange of the fuel system component is provided at the tip of the second arm portion.
  • this structure obtains stepwise elastic deformation of elastic deformation of the first arm portion outward in the radial direction and elastic deformation of the second arm portion outward in the radial direction. Therefore, the engaging portion of the second arm portion is snap-fit engaged with the flange of the fuel system component. Thereby, the amount of elastic deformation of the retaining portion in the radial direction can be suppressed while securing the amount of engagement of the retaining portion necessary for the engagement of the fuel system component with the flange.
  • the connecting portion is formed with a guide portion that extends in the axial direction and guides the flange coaxially with respect to the component mounting portion.
  • the first arm part and the second arm part are arranged on the same plane. According to this configuration, even when a load due to the fuel pressure acting on the fuel system component attached to the component attachment portion is applied to both arm portions, the radially outward component force is unlikely to act on both arm portions. Therefore, elastic deformation can be suppressed outward in the radial direction of both arm portions, and detachment of the fuel system component due to the elastic deformation can be suppressed.
  • a stepped recess is formed in the inner peripheral portion of the flange on the retaining side.
  • An engaging projection that can be engaged with the stepped recess is formed on the engaging portion of the second arm portion.
  • the engaging portion of the second arm portion is formed with a guide inclined surface that is inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction.
  • the connecting portion is formed with a guide inclined surface that is inclined radially outward from the tip end side in the axial direction of the component mounting portion toward the rear in the axial direction.
  • FIG. 1 is a configuration diagram of a fuel supply device according to Embodiment 1.
  • FIG. It is sectional drawing of a pressure regulating valve. It is a front sectional view of the mounting structure of the pressure regulating valve. It is a sectional side view of the attachment structure of a pressure regulating valve. It is a plane sectional view of the attachment structure of a pressure regulation valve. It is a perspective view of the pressure regulation valve and component attachment part of the state mutually separated. It is a partially broken perspective view of a component attachment part. It is a side view of a pressure regulation valve in assembly process 1, and a sectional view of a component attachment part. It is a side view of a pressure regulation valve in assembly process 2, and a sectional view of a component attachment part.
  • FIG. 1 It is a side view of a pressure regulation valve in assembly process 3, and a sectional view of a component attachment part. It is a side view of a pressure regulation valve in assembly process 4, and a sectional view of a component attachment part.
  • FIG. 1 It is sectional drawing of the metal mold
  • FIG. It is sectional drawing of the metal mold
  • FIG. It is a partially broken perspective view of the component attachment part concerning Embodiment 3.
  • FIG. It is typical sectional drawing which shows the relationship between an inner side arm part and a lower slide type
  • FIG. It is a typical sectional view of an inner side arm part and a lower slide type in die cutting process 2. It is a typical sectional view showing the relation between a connection arm part and a lower slide type. It is a typical sectional view of a connection arm part and a lower slide type in die cutting process 1. It is a typical sectional view of a connection arm part and a lower slide type in die cutting process 2.
  • a fuel system component mounting structure according to the present embodiment can be applied to a pressure regulating valve mounting structure in a fuel supply device used in a vehicle engine such as an automobile.
  • the fuel supply device 10 includes a fuel pump 14 disposed in a fuel tank 12, a pressure adjustment valve (fuel system component) 16, a fuel pipe 18, and the like.
  • the fuel pump 14 is a motor-integrated fuel pump, and supplies fuel in the fuel tank 12 to a so-called engine outside the tank.
  • a fuel filter 20 for filtering fuel is provided at the fuel inlet of the fuel pump 14.
  • a fuel pipe 18 is connected to the fuel suction port of the fuel pump 14.
  • the fuel pipe 18 has a fuel passage 22 and a branch passage 24 branched from the fuel passage 22.
  • a fuel supply passage 26 provided outside the fuel tank 12 is connected to the fuel passage 22.
  • a pressure regulating valve 16 is connected to the branch passage 24.
  • the fuel supply passage 26 is connected to the engine.
  • the pressure adjusting valve 16 is a diaphragm type pressure adjusting valve, and adjusts the pressure of the fuel in the fuel passage 22 so-called fuel pressure to a predetermined pressure.
  • the vertical direction is defined based on FIG. However, the vertical direction does not specify the arrangement direction of the pressure regulating valve 16.
  • the pressure regulating valve 16 includes a hollow cylindrical casing 28.
  • the casing 28 includes a first case half 29 and a second case half 30 that are divided into upper and lower parts. Both case halves 29 and 30 are press-formed products made of metal such as iron.
  • the second case half 30 is formed in a cup shape having an upper surface opened.
  • An annular flange portion 32 projecting outward in the radial direction is formed at the upper end portion of the second case half 30.
  • a vent hole 33 is formed in the side wall (upper wall) of the second case half 30.
  • the first case half 29 is formed in an inverted cup shape having a lower surface opened, specifically, a three-step cylindrical shape.
  • An annular flange portion 35 projecting radially outward is formed at the lower end of the lower cylindrical portion of the first case half 29.
  • a plurality of fuel introduction holes 36 are formed at equal intervals in the circumferential direction.
  • a fuel discharge hole 37 is formed in the upper wall portion (tip wall portion) of the first case half 29.
  • a hollow cylindrical valve seat member 39 is attached to the middle cylinder portion of the first case half 29 by press-fitting.
  • the outer peripheral portion of the annular plate-shaped diaphragm 41 is sandwiched between the flange portion 35 of the first case half 29 and the flange portion 32 of the second case half 30.
  • the upper flange portion 35 is caulked so as to wrap the lower flange portion 32.
  • the case halves 29 and 30 are integrated with the diaphragm 41 therebetween.
  • the diaphragm 41 is made of a rubber-like elastic material and has flexibility.
  • a flange 43 projecting from the outer peripheral portion of the casing 28 is formed by both flange portions 32 and 35.
  • the internal space of the casing 28 is divided into two upper and lower chambers, that is, a pressure regulating chamber 46 and a back pressure chamber 45 by a diaphragm 41.
  • An annular recess 44 is formed on the inner peripheral portion of the lower surface of the flange 43.
  • the valve holding member 49 and the spring receiving member 48 are integrally coupled to the inner peripheral portion of the diaphragm 41 by caulking with the diaphragm 41 interposed therebetween.
  • the pressure regulating chamber 46 is provided with a disc-shaped valve body 51 and a ball 52 positioned below the valve body 51.
  • the ball 52 is swingably supported by the valve holding member 49 via a locking plate 53.
  • a spring 55 (for example, a coil spring) is interposed between the opposing surfaces of the second case half 30 and the spring receiving member 48.
  • the spring 55 urges the valve body 51 in a direction in which the valve body 51 is seated on the valve seat member 39, that is, a valve closing direction (upward in FIG. 2).
  • a spacer ring 57 and an O-ring 58 are mounted on the outer peripheral surface of the lower cylinder portion of the first case half 29.
  • the spacer ring 57 is held between the flange 43 and the O-ring 58.
  • An O-ring 59 is attached to the outer peripheral surface of the upper cylindrical portion of the first case half 29.
  • FIG. 3 a connecting pipe portion 61 that is bent downward is formed at the downstream end portion of the branch passage 24 of the fuel pipe 18.
  • the connecting pipe part 61 is formed in an inner / outer double cylinder shape composed of an inner cylinder part 62 and an outer cylinder part 63.
  • the fuel pipe 18 is made of resin.
  • the downstream portion of the branch passage 24 is formed by the space between the inner cylinder portion 62 and the outer cylinder portion 63.
  • An excess fuel discharge passage 65 is formed in the inner cylinder portion 62.
  • a connection base 64 having a long rectangular outer shape that is slightly longer in the front-rear direction than in the left-right direction is formed in a flange shape at the lower end of the outer cylinder 63 (see FIG. 6).
  • a cylindrical fitting tube portion 66 projects concentrically from the lower end surface of the connection base portion 64.
  • the fitting cylinder part 66 has an inner diameter larger than the inner diameter of the connection base part 64.
  • the fitting cylinder part 66 has an outer diameter slightly smaller than the dimension of the connection base part 64 in the short direction (left-right direction).
  • a component mounting portion 68 including a connection base portion 64 and a fitting tube portion 66 is formed at the lower end portion of the outer tube portion 63 by integral molding.
  • the lower cylinder portion of the first case half 29 of the pressure regulating valve 16 is fitted in the lower end portion of the outer cylinder portion 63 of the fuel pipe 18.
  • the fuel introduction hole 36 is communicated with the branch passage 24.
  • the lower end surface of the fitting cylinder portion 66 is in contact with or close to the upper surface of the flange 43 of the pressure regulating valve 16.
  • the middle cylinder part and the upper cylinder part of the first case half 29 are fitted in the lower part of the inner cylinder part 62.
  • the fuel discharge hole 37 is communicated with the surplus fuel discharge passage 65.
  • An O-ring 58 and a spacer ring 57 are disposed in the fitting cylinder portion 66.
  • the O-ring 58 elastically seals between the first case half 29 and the fitting cylinder portion 66.
  • An O-ring 59 is disposed in the inner cylinder portion 62. The O-ring 59 elastically seals between the first case half 29 and the inner cylinder portion 62.
  • the fuel pump 14 operates to suck and pressurize the fuel in the fuel tank 12 through the fuel filter 20. Thereafter, the fuel pump 14 supplies fuel to the engine via the fuel passage 22 and the fuel supply passage 26. Part of the fuel supplied to the engine is introduced from the fuel passage 22 into the pressure regulating chamber 46 of the pressure regulating valve 16 through the branch passage 24.
  • the pressure adjustment valve 16 adjusts the fuel pressure supplied to the engine to a predetermined pressure. That is, as shown in FIG. 2, when the fuel pressure in the pressure regulating chamber 46 is lower than the elastic force of the spring 55 of the back pressure chamber 45 of the pressure regulating valve 16, the valve body 51 is seated on the valve seat member 39. The valve is closed.
  • the component mounting portion 68 includes hanging piece-like retaining arms (preventing portions) 70 on the left and right sides of the connection base 64.
  • the left and right retaining arms 70 are symmetrical to each other.
  • each retaining arm 70 has a pair of front and rear outer arm portions 72, one connection arm portion 74, one inner arm portion 76, and one guide arm portion 78.
  • the pair of outer arm portions 72 extends downward (in the axial direction of the component mounting portion 68) from both front and rear end portions of the side portion of the connection base portion 64.
  • the outer arm portion 72 has a band plate shape and extends from the rear side (upper) in the axial direction of the component mounting portion 68 to the front side (lower) in the axial direction.
  • the pair of outer arm portions (first arm portions) 72 extend in parallel to each other and are located on the same plane parallel to the axis of the component mounting portion 68.
  • the outer arm portion 72 is formed so as to be elastically deformable, that is, so-called flexibly deformed radially outward with a connection portion with the connection base portion 64 as a fulcrum (see a two-dot chain line 72 in FIG. 3).
  • connection arm portion (connection portion) 74 is constructed between the distal end portions (lower end portions) of the outer arm portions 72.
  • the connection arm portion 74 is formed in a band plate shape extending in the front-rear direction.
  • the connecting arm portion 74 is disposed on the same plane as the outer arm portions 72 (see FIG. 5).
  • the inner arm portion (second arm portion) 76 is formed in a strip shape extending upward from the center portion of the connection arm portion 74.
  • the inner arm portion 76 is disposed in parallel and on the same plane as the outer arm portions 72 (see FIG. 5).
  • the inner arm portion 76 is formed so as to be elastically deformed, that is, so-called flexibly deformed radially outward with a connection portion with the connection arm portion 74 as a fulcrum (see a two-dot chain line 76 in FIG. 3).
  • the retaining arm 70 is formed with an inverted U-shaped opening groove 79 surrounded by the connection base portion 64, both outer arm portions 72, the connection arm portion 74 and the inner arm portion 76.
  • the distal end portion (upper end portion) of the inner arm portion 76 is an engaging portion 80.
  • a fitting groove portion 81 having a circular arc cross section having a slightly larger radius than the outer peripheral surface of the second case half 30 of the pressure regulating valve 16 is formed.
  • the groove bottom surface of the fitting groove portion 81 is connected to the groove bottom surface of a guide groove 84 described later.
  • the front and rear side wall portions of the fitting groove portion 81 protrude inward from the inner side surface of the remaining portion of the inner arm portion 76 (see FIG. 3).
  • the front end surface (upper end surface) of the engaging portion 80 is formed on a plane orthogonal to the axis of the component mounting portion 68.
  • the front end surface of the engaging portion 80 is in contact with or close to the lower surface of the flange 43 of the pressure regulating valve 16 attached to the component attaching portion 68.
  • the front end surface of the engaging portion 80 faces the flange 43 located on the retaining side.
  • the engaging portion 80 is disposed in the projection plane of the flange 43 in plan view (see FIG. 5).
  • the guide arm portion (guide portion) 78 is formed in a band plate shape extending downward from the central portion of the connection arm portion 74.
  • the guide arm portion 78 is formed in an inclined shape that is inclined at a predetermined angle ⁇ (for example, 15 °) radially outward of the component mounting portion 68 from the base end portion (upper end portion) to the distal end portion (lower end portion).
  • ⁇ for example, 15 °
  • the remaining portions of the both retaining arms 70 excluding the guide arm portion 78 are substantially parallel to each other.
  • the portion extends linearly in the axial direction (vertical direction) of the component mounting portion 68.
  • a guide groove 84 extending in the axial direction (vertical direction) of the component mounting portion 68 is formed on the inner side surface of the central portion in the front-rear direction of the retaining arm 70.
  • the groove depth of the guide groove 84 (the dimension in the front and back direction in FIG. 4) is shallow.
  • the groove width (the dimension in the front-rear direction) of the guide groove 84 is gradually decreased from the tip (lower end) of the guide arm portion 78 toward the engaging portion 80 of the inner arm portion 76.
  • the upper end of the guide groove 84 is connected to the fitting groove portion 81 of the engaging portion 80.
  • the pressure regulating valve 16 is disposed between the guide arm portions 78 of the both retaining arms 70.
  • the left and right end portions of the flange 43 of the pressure regulating valve 16 are fitted into the guide grooves 84 of the guide arm portion 78.
  • a spacer ring 57 and O-rings 58 and 59 are attached to the pressure adjustment valve 16 in advance.
  • the pressure regulating valve 16 is further inserted into the component attachment portion 68.
  • the flange 43 is slid upward along the fitting groove 81 beyond the guide groove 84.
  • both inner arm portions 76 are expanded in the opposite direction, that is, radially outward using elastic deformation.
  • the middle cylinder portion and the upper cylinder portion of the first case half 29 of the pressure regulating valve 16 are inserted into the inner cylinder portion 62 of the connection pipe portion 61 together with the O-ring 59.
  • the lower cylinder portion of the first case half 29 is inserted into the fitting cylinder portion 66 together with the O-ring 58.
  • the pressure adjusting valve 16 is attached to the component attaching portion 68 in a state of being positioned in the axial direction (vertical direction in FIG. 3).
  • both inner arm portions 76 are simultaneously elastically deformed radially outward. Thereby, the engaging part 80 is disengaged from the flange 43. In this state, the pressure regulating valve 16 can be pulled out from the component mounting portion 68.
  • the mold 90 includes a lower slide mold 92 and left and right side slide molds 94.
  • a cavity corresponding to the component mounting portion 68 is formed by closing the lower slide die 92 and the both side slide die 94.
  • FIG. 12 shows a state where the cavity is filled with resin and the component mounting portion 68 is molded.
  • the lower slide die 92 is provided so as to be slidable in the axial direction (vertical direction).
  • the lower slide mold 92 moves upward toward the side slide mold 94 and closes the mold.
  • the lower slide die 92 has a molding convex portion 96, and the molding convex portion 96 has a molding surface corresponding to the inner peripheral surface of the component mounting portion 68.
  • the forming convex portion 96 has a tapered undercut portion 98 having an inclined surface 98a.
  • the undercut portion 98 is located between the fitting tube portion 66 and the inner arm portion 76 and forms the upper side portion of the opening groove 79 of the component attachment portion 68.
  • the inclined surface 98a gradually decreases the diameter of the undercut portion 98 from the upper end to the lower side.
  • the double-sided slide mold 94 is provided so as to be slidable in the radial direction (left-right direction), and is closed by movement in the opposite direction.
  • Both side surface slide molds 94 are bilaterally symmetric and have a molding recess 100.
  • the molding recess 100 has molding surfaces corresponding to both half halves of the outer peripheral surface of the component mounting portion 68.
  • An inverted U-shaped opening groove forming portion 101 corresponding to each of the opening grooves 79 of the component mounting portion 68 protrudes from the forming recess 100.
  • An inclined surface 101 a corresponding to the inclined surface 98 a of the undercut portion 98 of the forming convex portion 96 is formed at the tip of the opening groove forming portion 101.
  • Resin (specifically, molten resin) is injected from a resin injection gate (not shown) of the fuel pipe 18 into the cavity of the mold 90 described above. Thereby, the component attachment part 68 is molded together with the fuel pipe 18.
  • the pressure adjusting valve 16 is attached to the retaining arm 70 as described above by elastically deforming the outer arm portion 72 radially outward and the inner arm portion 76 radially outward. This causes a gradual elastic deformation with elastic deformation. Thereby, the engaging portion 80 of the inner arm portion 76 is snap-fit engaged with the flange 43 of the pressure regulating valve 16. As a result, it is possible to suppress the amount of elastic deformation of the retaining arm 70 in the radially outward direction while securing the amount of engagement of the engagement portion 80 necessary for engagement with the flange 43.
  • the mounting structure of the pressure regulating valve 16 eliminates the cap required in the conventional example, so that the number of parts and assembly man-hours can be reduced.
  • the attachment structure of the retaining arm 70 utilizes two-stage elastic deformation by the outer arm portion 72 and the inner arm portion 76. Therefore, this structure allows a large displacement while shortening the dimension in the axial direction of the component mounting portion 68 as compared with the elastic engagement piece by one-stage elastic deformation of the conventional example. For this reason, the retaining arm 70 can be compactly formed in the axial direction of the component mounting portion 68, and the moldability of the lower slide die 92 (see FIG. 13) can be improved.
  • the outer arm 72 and the inner arm 76 of the retaining arm 70 are arranged on the same plane. Therefore, even if a load due to the fuel pressure acting on the pressure adjustment valve 16 attached to the component attachment portion 68 is applied to both arm portions 72 and 76, a component force radially outward acts on both arm portions 72 and 76. Hateful. Therefore, elastic deformation can be suppressed outward in the radial direction of both arm portions 72 and 76, and detachment of the pressure regulating valve 16 due to the elastic deformation can be suppressed.
  • both arm portions 74 and 76 are formed in a strip shape extending in the axial direction of the component mounting portion 68.
  • the upper end surface of the engaging portion 80 of the inner arm portion 76 is orthogonal to the axial direction of the component attaching portion 68.
  • both the arm portions 74 and 76 are easily elastically deformed radially outward.
  • both the arm portions 74 and 76 after assembly are not easily elastically deformed by a load due to the fuel pressure acting on the pressure regulating valve 16, and the holding force against the load is high.
  • the engagement area of the engagement portion 80 of the inner arm portion 76 with respect to the flange 43 of the pressure regulating valve 16 can be increased.
  • the holding force with respect to the load by the fuel pressure which acts on the pressure regulation valve 16 can be increased.
  • the number of retaining arms 70 is set to be an even number, it is possible to facilitate the mold design for resin molding as compared to the case of an odd number.
  • Embodiment 2 has a structure in which the inner arm portion 76 (see FIG. 3) of the retaining arm 70 of Embodiment 1 is changed.
  • the engagement protrusion 103 is formed on the upper end surface of the engagement portion 80 of the inner arm portion 76 (specifically, the upper end surfaces of the front and rear side wall portions of the fitting groove portion 81).
  • the engagement protrusion 103 is configured to be engageable with the stepped recess 44 of the flange 43 of the pressure regulating valve 16.
  • the engaging protrusion 103 engages with the stepped recess 44 of the flange 43 of the pressure regulating valve 16. Thereby, the position shift to the radial direction outward (right side in FIG. 17) of the engaging part 80 of the inner side arm part 76 can be suppressed.
  • Embodiment 3 has a structure in which the retaining arm 70 (see FIG. 7) of Embodiment 1 is changed.
  • the changed structure will be described with reference to FIGS. 18 to 24, and a duplicate description will be omitted.
  • guide protrusions 105 are formed on both sides of the engaging portion 80 of the inner arm portion 76.
  • the guide protrusion 105 has a guide slope 106 that is inclined radially outward from the lower side toward the upper side.
  • the connection arm portion 74 has a pair of front and rear guide inclined surfaces 108 between the outer arm portion 72 and the inner arm portion 76. Each guide slope 108 is inclined radially outward from the lower side to the upper side.
  • the lower slide mold 92 is formed with a molding slope (slope on the mold side) 110.
  • the forming slope 110 corresponds to the guide slope 106 of the guide protrusion 105 of the inner arm portion 76.
  • the lower slide die 92 moves downward relative to the inner arm portion 76 when the component attaching portion 68 is die-molded during resin molding.
  • the molding slope 110 of the lower slide mold 92 slides on the guide slope 106 of the guide projection 105 of the inner arm portion 76.
  • the engaging portion 80 of the inner arm portion 76 is pushed outward in the radial direction.
  • the engaging portion 80 of the inner arm portion 76 can be easily released.
  • the load concerning the engaging part 80 of the inner side arm part 76 at the time of mold release is reduced.
  • the forming slope 110 of the lower slide die 92 exceeds the guide slope 106 of the guide protrusion 105, the inner arm portion 76 is elastically restored to the original position.
  • a molding slope (one side slope) 112 is formed at the lower end portion of the opening groove molding portion 101 of the lower slide die 92.
  • the forming slope 112 corresponds to the guide slope 108 of the connection arm portion 74.
  • connection arm portion 74 is elastically restored by the outer arm portion 72. It abuts on the molded part 97. Then, when the molding slope 112 of the lower slide die 92 exceeds the guide slope 108 of the connection arm portion 74, the inner arm portion 76 is elastically restored to the original position (see FIG. 21).
  • Embodiment 4 has a process in which the assembly process of the pressure regulating valve 16 to the component mounting portion 68 of Embodiment 1 is changed.
  • the changed process will be described with reference to FIGS. 25 and 26, and a duplicate description will be omitted.
  • the pressure adjustment valve 16 is assembled to the component mounting portion 68 using a jig 114.
  • the jig 114 is formed in a pillar shape, and has a U-shaped groove 115 that receives the second case half 30 of the pressure regulating valve 16 at the upper end.
  • the second case half 30 of the pressure regulating valve 16 is received in the U-shaped groove 115 of the jig 114.
  • the upper end surfaces of the left and right side wall portions 116 of the U-shaped groove 115 are brought into contact with the lower end surface of the flange 43 of the pressure regulating valve 16.
  • the pressure adjustment valve 16 is pushed up together with the jig 114 with respect to the component mounting portion 68.
  • the left and right side surfaces of the jig 114 are moved upward while elastically sliding and contacting the connection arm portion 74 and the inner arm portion 76.
  • the jig 114 is extracted downward.
  • the outer arm portion 72 is elastically restored, and the engaging portions 80 of the inner arm portions 76 are snap-fit engaged with the flange 43, and the pressure adjusting valve 16 is prevented from coming off at the component attaching portion 68.
  • Embodiment 5 has a configuration in which the retaining arm 70 (see FIG. 5) of Embodiment 1 is changed.
  • the changed configuration will be described with reference to FIG. 27, and redundant description will be omitted.
  • the component mounting portion 68 has three retaining arms 70 at equal intervals in the circumferential direction. In this way, by increasing the number of retaining arms 70 to three, it is possible to further prevent the pressure regulating valve 16 from coming off.
  • Embodiment 6 has a configuration in which the retaining arm 70 (see FIG. 5) of Embodiment 1 is changed.
  • the changed configuration will be described with reference to FIG. 28, and redundant description will be omitted.
  • the component mounting portion 68 has four retaining arms 70 at equal intervals in the circumferential direction.
  • the number of retaining arms 70 is an even number, the mold design for resin molding can be facilitated.
  • the present invention is not limited to the above-described embodiments, and modifications can be made without departing from the present invention.
  • the present invention is not limited to the pressure regulating valve 16 and may be applied to other fuel system parts, for example, a mounting structure such as a fuel pressure sensor for detecting the fuel pressure in the fuel pipe 18.
  • the pressure regulating valve 16 may be a pressure regulating valve 16 such as a bellows type or a relief valve type in addition to the diaphragm 41 type.
  • the number of retaining arms 70 may be any other number.
  • the guide arm portion 78 may be omitted.
  • the guide slope 106 may be formed on the engaging portion 80 itself, and the guide protrusion 105 may be omitted.
  • the guide slope 108 may be formed with a guide projection having the guide slope 108 on the connection arm 74 instead of the connection arm 74 itself.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Valves (AREA)

Abstract

L'invention concerne une structure de montage destinée à un élément de système de combustible comprenant : une soupape (16) de régulation de pression ayant une bride (43) ; et une tuyauterie (18) pour combustible ayant une section (68) de montage d'élément. La section (68) de montage d'élément comporte un bras de retenue (70) formé sur cette dernière pour retenir la bride (43) par engagement par encliquetage. Le bras de retenue (70) comporte une section (72) de bras externe, une section (74) de bras de liaison et une section (76) de bras interne. La section (72) de bras externe est étendue axialement vers l'avant à partir de la section (68) de montage d'élément et est formée pour être déformable élastiquement. La section (74) de bras de connexion est formée au niveau de l'extrémité avant axiale de la section (72) de bras extérieur. La section (76) de bras interne est étendue axialement vers l'arrière à partir de la section (74) de bras de raccordement, comporte à son extrémité avant une section (80) de mise en prise venant en prise avec la bride (43), et est formée pour être déformable élastiquement.
PCT/JP2018/001396 2017-02-09 2018-01-18 Structure de montage pour élément de système de combustible WO2018147031A1 (fr)

Applications Claiming Priority (2)

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JP2017-021875 2017-02-09
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WO2023181777A1 (fr) * 2022-03-23 2023-09-28 愛三工業株式会社 Dispositif d'alimentation en carburant

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JP7305577B2 (ja) * 2020-02-13 2023-07-10 愛三工業株式会社 圧力調整装置

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JP2003254200A (ja) * 2002-02-28 2003-09-10 Denso Corp 燃料リターン装置
JP2005188383A (ja) * 2003-12-25 2005-07-14 Denso Corp ポンプモジュール
JP2005240609A (ja) * 2004-02-25 2005-09-08 Denso Corp 調圧装置およびそれを用いた燃料供給装置
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JP2003254200A (ja) * 2002-02-28 2003-09-10 Denso Corp 燃料リターン装置
JP2005188383A (ja) * 2003-12-25 2005-07-14 Denso Corp ポンプモジュール
JP2005240609A (ja) * 2004-02-25 2005-09-08 Denso Corp 調圧装置およびそれを用いた燃料供給装置
JP2007077874A (ja) * 2005-09-14 2007-03-29 Honda Motor Co Ltd 物品の結合構造

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