JP6125684B1 - Fuel supply device - Google Patents

Abstract

A stator of a brushless motor that can be divided in the axial direction of a stator core in which a plurality of magnetic steel plates laminated with burr protruding directions aligned in the same direction are coupled to each other. A bobbin that is mounted on the stator core so as to be made of a resin bobbin constituent member, a coil that is wound around the stator core via the bobbin, and a resin that is molded using the bobbin constituent member and part of the coil as an insert part In the fuel supply device constituted by the covering portion made of the metal, the bobbin is prevented from being damaged by the burr on the stator core side even if the brushless motor is downsized. A protrusion 47 abutting on a stator core 15 is provided on a surface of a specific bobbin constituent member 38 disposed opposite to at least a protruding direction 50 of a burr 14a of the pair of bobbin constituent members 38, 39. 48 is projected. [Selection] Figure 1

Description

  The present invention provides a stator of a brushless motor having a rotor connected to a pump, in which a plurality of magnetic steel plates laminated with the burr protruding directions aligned in the same direction are coupled to each other, and an annular yoke portion and the annular A stator core formed in a shape having tooth portions protruding radially inward from a plurality of locations spaced at equal intervals in the circumferential direction of the yoke portion, and a pair of resin products that can be divided in the axial direction of the stator core A bobbin that is mounted on the stator core so as to be composed of the bobbin constituent member, a coil that is wound around the stator core via the bobbin, and the pair of bobbin constituent member and a part of the coil are the stator core. The bobbin component and part of the coil are molded as insert parts while covering from the opposite side. A fuel supply system composed of a fat-made covering portion.

  By the way, a plurality of magnetic steel plates constituting the stator core have burrs generated during the punching process, and the burr of the magnetic steel plates bites into a pair of resin bobbin constituting members constituting the bobbin attached to the stator core. Damage to the member can cause poor insulation between the stator core and the coil.

  On the other hand, in the motor with a brush disclosed in Patent Document 1, a groove that can accommodate a burr is formed in a bobbin at a portion that contacts the end face of the armature core. Such a technique is applied to a stator of a brushless motor. If applied, it will be possible to prevent the bobbin from being damaged by burrs of the magnetic steel sheet.

JP 2009-65723 A

  However, if the technique disclosed in Patent Document 1 is simply applied to a miniaturized brushless motor, the bobbin shape becomes too fine at the portion corresponding to the groove portion, and the resin does not go around in the mold. It becomes difficult to form.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a fuel supply device capable of preventing the bobbin from being damaged by a burr on the stator core side even if the brushless motor is downsized.

  In order to achieve the above object, according to the present invention, a stator of a brushless motor having a rotor connected to a pump is formed by combining a plurality of magnetic steel plates laminated with the burr protruding directions aligned in the same direction. And a stator core formed in a shape having an annular yoke portion and teeth portions projecting radially inward from a plurality of positions spaced at equal intervals in the circumferential direction of the annular yoke portion, and dividing in the axial direction of the stator core A bobbin that is mounted on the stator core so as to be composed of a pair of resin-made bobbin components, a coil that is wound around the stator core via the bobbin, the pair of bobbin components and the coil A part of the bobbin constituting member and a part of the coil are inserted into the insert portion while covering a part of the coil from the side opposite to the stator core In the fuel supply device configured with a resin-made coating portion molded as a part of the stator core of a specific bobbin constituent member disposed at least facing the protruding direction of the burr among the pair of bobbin constituent members A first feature is that a protrusion that abuts against the stator core is provided on the opposing surface.

  According to the present invention, in addition to the configuration of the first feature, the pair of bobbin constituent members includes an annular portion corresponding to the annular yoke portion and a plurality of tooth portion corresponding portions corresponding to the tooth portions, and the stator core. A plurality of end plate portions opposed to the end surfaces, and arranged on both sides in the circumferential direction of the tooth portions so as to abut on the inner peripheral surface of the annular yoke portion and the side surfaces of the tooth portions, and connected to the end plate portions. The outer diameter of the annular portion of the specific bobbin constituent member is set smaller than the outer diameter of the annular yoke portion by an amount corresponding to the burr on the outer periphery of the magnetic steel sheet. The outer edge of the first protrusion protruding from the end plate portion of the specific bobbin constituent member along the radial direction of the stator core is formed along the outer periphery of the annular portion of the specific bobbin constituent member. To be done The second feature.

According to the present invention , in addition to the configuration of the second feature, an inner edge of the tooth portion along the radial direction of the stator core is formed so as to be along a first imaginary circle centered on a rotation axis of the rotor. An inner edge along the radial direction of the corresponding portion of the tooth portion of the bobbin constituent member, and an inner edge along the radial direction of the second protrusion protruding from the end plate portion of the specific bobbin constituent member, A third feature is that the rotor is formed so as to be along a second imaginary circle having a diameter larger than that of the first imaginary circle by an amount corresponding to a burr on the inner edge of the tooth portion, with the rotation axis of the rotor as a center.

  According to the present invention, in addition to the configuration of the third feature, the first and second protrusions are arranged in a pair at a central portion between the plurality of body portions of the specific bobbin constituent member. Is the fourth feature.

  In addition to the configuration of the fourth feature, the present invention provides an eject pin at the time of molding the specific bobbin constituent member at the portion corresponding to the tooth portion of the specific bobbin constituent member between the first and second protrusions. The fifth feature is that the traces of No. are arranged.

  Furthermore, in addition to any of the configurations of the first to fifth features, the present invention covers at least a part of a unit case that commonly supports the pump that discharges fuel of a vehicle-mounted engine and the brushless motor. A resin casing is molded using the unit case as an insert part, and at least a part of the electronic control board connected to the casing and connected to the power supply terminal supported by the bobbin while being connected to the coil. A sixth feature is that an attachment portion that is embedded and is fastened to an intake system component that constitutes a part of the intake system of the engine is integrally provided.

  According to the first feature of the present invention, the surface of the specific bobbin constituent member that is disposed so as to face at least the protruding direction of the burr of the magnetic steel plate among the pair of bobbin constituent members constituting the bobbin on the surface facing the stator core. Since a plurality of projections are provided, and these projections abut against the stator core, the stator core can be applied even when molding pressure is applied when molding a specific bobbin constituent member and a resin coating portion covering a part of the coil. It is possible to prevent the specific bobbin constituent member from being damaged by the burr on the side, making it easy to mold the specific bobbin constituent member, and reducing the size of the brushless motor.

  According to the second feature of the present invention, since the bobbin constituent member and a part of the coil are covered with the covering portion from the opposite side to the stator core, it is not necessary to cover the outer periphery of the stator core with the bobbin. The outer diameter of the annular portion of the end plate portion of the specific bobbin constituent member is made smaller than the outer diameter of the annular yoke portion of the stator core by an amount corresponding to the outer peripheral burr of the magnetic steel plate, and the specific bobbin configuration The outer edge of the first protrusion is formed along the outer periphery of the annular portion of the member, and the specific bobbin constituent member is damaged by the burr on the outer periphery of the magnetic steel sheet while simplifying the shape of the specific bobbin constituent member. Can be prevented.

  According to the third feature of the present invention, the inner edge of the tooth portion of the stator core is formed along the first virtual circle using the fact that the portion facing the rotor of the stator core does not need to be covered with the bobbin. On the other hand, the specific bobbin configuration is formed such that the inner edge of the tooth portion corresponding portion of the specific bobbin component and the inner edge of the second protrusion are formed along the second virtual circle having a larger diameter than the first virtual circle. It is possible to prevent the specific bobbin constituent member from being damaged by the burr of the tooth portion while simplifying the shape of the member.

  According to the fourth feature of the present invention, the first and second protrusions are arranged in a pair in the central portion along the circumferential direction of the stator core in the tooth portion corresponding portion of the end plate portion of the bobbin constituent member. A type of bobbin constituent member is formed by reasonably arranging the first and second protrusions on the tooth portion corresponding portion which is a relatively wide area of the bobbin constituent member on the projection onto the plane orthogonal to the axis of the stator core. Molding can be facilitated, and consequently the brushless motor can be reduced in size.

  According to the fifth feature of the present invention, since the ejected pin is pressed between the first and second protrusions when the specific bobbin component is molded, the contact between the stator core and the specific bobbin component is prevented. Avoid pushing the ejector pin and avoid leaving the contact point, so that the specific bobbin component does not float from the stator core due to the stamp and no gap is created between the pair of bobbin components. Generation of insulation failure can be prevented.

  Further, according to the sixth aspect of the present invention, at least a part of the unit case that supports the pump and the brushless motor in common is covered with a resin casing molded with the unit case as an insert part. Since at least a part of the electronic control board is embedded in the housing, and a mounting portion to be fastened to the intake system parts is integrally provided, the fuel supply device including the pump and the brushless motor is handled as a single functional part. Thus, the number of parts can be reduced and the assembly workability can be improved, and the assembly workability of the fuel supply apparatus can be improved.

It is a longitudinal cross-sectional view of a fuel supply apparatus. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is a perspective view of a bobbin structural member. FIG. 4 is a sectional view taken along line 4-4 of FIG. It is a partially broken side view which shows a part of engine intake system.

  The embodiment of the present invention will be described with reference to FIG. 1 to FIG. 5. First, in FIG. 1, the fuel supply apparatus includes a pump, for example, a Wesco pump 5, and a brushless motor 6 that drives the Wesco pump 5. Are built in and coupled to a common unit case 7 having a hollow cylindrical shape.

  The Wesco pump 5 has an impeller 9 having a large number of radial grooves 8 on the outer periphery, and a pump chamber 10 extending in an arc shape so as to face the outer periphery of the impeller 9, and the impeller 9 is rotatably accommodated. A pump case 11 is provided. The pump case 11 is divided into an outer case half 12 and an inner case half 13, and the impeller 9 is interposed between the outer case half 12 and the inner case half 13 and the pump. A chamber 10 is defined.

  The pump case 11 is sandwiched between an annular step 7a formed on the inner surface of the unit case 7 facing outward in the axial direction, and a first caulking portion 7b formed at one end of the unit case 7. In this way, the unit case 7 is accommodated in one end.

  Referring also to FIG. 2, the brushless motor 6 includes a stator 18 and a rotor 19 disposed in the stator 18. The stator 18 includes a stator core 15, a bobbin 17 attached to the stator core 15, and a coil 16 wound around the stator core 15 via the bobbin 17.

  The stator core 15 is formed by caulking and bonding a plurality of laminated magnetic steel plates 14 to each other. The stator core 15 is radially arranged at a plurality of, for example, six locations at equal intervals in the circumferential direction of the inner periphery of the annular yoke portion 15a. It is formed in a shape provided with a tooth portion 15b protruding inward. At least one set of the coils 16 divided into three phases (U phase, V phase, W phase) is wound around the stator core 15 via a bobbin 17, and the coil 16 includes the tooth portion. The winding portions 16a corresponding to 15b are provided, and the number of windings of a plurality of, for example, six winding portions 16a is set to be the same.

  The bobbin 17 includes first and second bobbin constituent members 38 and 39 that can be divided in the axial direction of the stator core 15, and the bobbin constituent members 38 and 39 are made of resin.

  Referring also to FIG. 3, the first bobbin constituting member 38 that constitutes a part of the bobbin 17 and is disposed on the opposite side to the Wesco pump 5 has one end portion along the axial direction of the stator core 15 ( In this embodiment, the tooth plate 40 is in contact with the end plate portion 40 that is in contact with the end portion opposite to the Wesco pump 5, and the inner peripheral surface of the annular yoke portion 15 a and the side surface of the tooth portion 15 b. It is formed so as to have a plurality of body portions 41 arranged on both sides in the circumferential direction of the portion 15 b and connected to the end plate portion 40.

  The end plate portion 40 includes an annular portion 40 a corresponding to the annular yoke portion 15 a of the stator core 15 and a plurality of tooth portion corresponding portions 40 b corresponding to the tooth portions 15 b, and the body portion 41 includes the stator core 15. A pair of side plate portions 41a that contact both side surfaces along the circumferential direction of the tooth portion 15b and the tooth portion 15b adjacent in the circumferential direction are in contact with the inner periphery of the annular yoke portion 15a and are adjacent in the circumferential direction. It has a circular arc connecting plate portion 41b that connects the side plate portions 41a, and extends in the axial direction of the stator core 15 so as to be connected to the end plate portion 40. The side plate portion 41a is formed so as to come into contact with the surface of the tooth portion 15b formed in a letter shape on the annular yoke portion 15a side.

  In addition, a plurality of, for example, six grooves 42 for accommodating a part of the winding portion 16 a of the coil 16 are formed on the surface of the end plate portion 40 opposite to the stator core 15, and the power supply terminal 20. A support recess 43 for inserting and supporting, a plurality of interdental wire portions (not shown) connecting the plurality of winding portions 16a to the three-phase path, and the coil 16 to the power supply terminal 20 side. A groove portion (not shown) for guiding an extended power line connecting wire portion (not shown) is formed.

  Further, the second bobbin constituting member 39 arranged on the side of the Wesco pump 5 so as to constitute the bobbin 17 together with the first bobbin constituting member 38 has a portion corresponding to the stator core 15 of the first bobbin constituting member 38. A plurality of, for example, six grooves for accommodating a part of the winding portion 16a of the coil 16 as well as the end plate portion 40 and the end portions and the body portions similar to those of the plurality of body portions 41 are provided. 44 is formed. The interdental wire portion and the power wire crossover portion of the coil 16 are concentrated on the end plate portion 40 of the first bobbin constituting member 38, and the second bobbin constituting member 39 includes the support recess 43 and The groove part for guiding the interdental crossover part and the power line crossover part is not necessary.

  The first and second bobbin constituent members 38 and 39 mutually connect the trunk portion 41 of the first bobbin constituent member 38 and the trunk portion of the second bobbin constituent member 39 while sandwiching the stator core 15 from both axial sides. The stator core 15 is mounted so as to face or abut.

  In addition to the stator core 15, the bobbin 17, and the coil 16, the stator 18 covers the first and second bobbin constituting members 38, 39 and a part of the coil 16 from the side opposite to the stator core 15. In this way, the first and second bobbin constituting members 38 and 39 and the first and second covering parts 21 and 22 made of resin are formed by using a part of the coil 16 as an insert part.

  The first covering portion 21 covers a part of the first bobbin constituent member 38 and the coil 16 from the side opposite to the stator core 15, and inserts the first bobbin constituent member 38 and a part of the coil 16 into the insert. It is molded as a part, and the end of the power supply terminal 20 opposite to the bobbin 17 protrudes from the first covering portion 21 so as to face the outside of the unit case 7. The second covering portion 22 covers a part of the second bobbin constituting member 39 and the coil 16 from the side opposite to the stator core 15, and covers the second bobbin constituting member 39 and a part of the coil 16. Molded as an insert part.

  Such a brushless motor 6 is inserted into the unit case 7 with a disc-like spacer 23 interposed between the pump case 11 of the Westco pump 5 and the second covering portion 22, and the unit case 7 The brushless motor 6 is built in the unit case 7 by engaging the second caulking portion 7 c formed at the other end of the first cover portion 21 with the first covering portion 21. The spacer 23 is not interposed between the pump case 11 and the second covering portion 22, and the second covering portion 22 is brought into direct contact with the annular step portion 7 a of the unit case 7 or the pump case 11. The brushless motor 6 may be positioned in the case 7.

  The rotor 19 is made of a permanent magnet that is magnetized by a plurality of magnetic poles in the circumferential direction, and a rotating shaft 25 that passes through the rotor 19 is coaxially provided on the rotor 19. One end of the rotary shaft 25 penetrates the spacer 23 and is inserted into the pump case 11 with a first sliding bearing 26 interposed between the rotary shaft 25 and the pump case 11. The impeller 9 is attached to the rotary shaft 25 in the pump case 11 so as not to be relatively rotatable. In this embodiment, a non-circular attachment hole 27 is provided at the center of the impeller 9, and the impeller 9, a non-circular portion 25a having a cross-sectional shape corresponding to the cross-sectional shape of the mounting hole 27 is provided at one end portion of the rotary shaft 25. When the non-circular portion 25a is inserted into the mounting hole 27, the impeller 9 is attached to the rotating shaft 25 so as not to rotate relative to the rotating shaft 25 with a play that allows a slight inclination of the rotating shaft 25. The outer case half 12 and the inner case half 13 of the pump case 11 are prevented from moving along the axial direction of the impeller 9.

  The inner case half 13 of the pump case 11 is integrally provided with a cylindrical bearing housing 13 a that coaxially surrounds the rotary shaft 25, and between the bearing housing 13 a and the rotary shaft 25, One sliding bearing 26 is interposed. The other end of the rotary shaft 25 is rotatably supported by the first covering portion 21 via a second sliding bearing 28.

  A suction port 29 is formed in the outer case half 12 of the pump case 11 so as to communicate with one circumferential end of the pump chamber 10, and the other end in the circumferential direction of the pump chamber 10 is formed in the inner case half 13. A discharge port 30 communicating with the part is formed. In addition, a cylindrical suction pipe 12a that directly communicates with the suction port 29 is integrally provided on the outer case half body 12 so as to project outward, and bubbles generated by the pump action in the pump case 11 are formed. A deaeration hole 31 for discharging the gas is formed.

  A passage 32 communicating with the discharge port 30 is formed between the rotor 19 and the stator 18 in the brushless motor 6, and a fuel outlet chamber 33 communicating with the passage 32 is formed in the first covering portion 21. In addition, a cylindrical discharge pipe 21a for discharging high-pressure fuel when the pump is operated integrally projects from the first covering portion 21, and the discharge pipe 21a is provided in the discharge pipe 21a from the fuel outlet chamber 33. A check valve 35 for preventing backflow that allows the flow of fuel is accommodated only on the fuel discharge port 34 side at the tip of the fuel cell.

  By the way, the plurality of magnetic steel plates 14 constituting the stator core 15 are formed by punching, and the burrs 14a (see FIG. 1) generated at the time of the punching are stacked so that the protruding directions 50 are aligned in the same direction and coupled to each other. In this embodiment, of the first and second bobbin constituting members 38, 39 constituting the bobbin 17, a plurality of burrs 14a are projected so as to protrude toward the first bobbin constituting member 38 side. The magnetic steel plates 14 are laminated.

  Referring to FIG. 4 as well, a specific bobbin constituent member disposed at least facing the protruding direction 50 of the burr 14a of the magnetic steel plate 14 among the first and second bobbin constituent members 38, 39, In the embodiment, the surface of the first bobbin constituting member 38 facing the stator core 15, that is, the end plate portion 40 is provided with a plurality of protrusions 47 and 48 that abut against the stator core 15. In this embodiment, First and second protrusions 47 and 48 are provided on the end plate portion 40 of the first bobbin constituting member 38 so as to be arranged in pairs for each tooth portion 15a of the stator core 15.

  The first and second protrusions 47, 48 are arranged in pairs between the plurality of body parts 41 of the first bobbin constituting member 38, and a central part between the body parts 41. The first and second protrusions 47 and 48 are arranged in pairs. That is, on the straight line L extending in the radial direction of the stator core 15 through the central portion between the body portions 41, the first protrusion 47 having a substantially triangular shape and the inner side of the first protrusion 47 in the radial direction of the stator core 15. In this embodiment, a pair of second protrusions 48 formed in a substantially triangular shape are arranged at equal intervals in the circumferential direction of the stator core 15 corresponding to the six tooth portions 15b. Six sets of first and second protrusions 47 and 48 are arranged. In addition, the first and second protrusions 47 and 48 of the tooth portion corresponding portion 40b of the end plate portion 40 of the first bobbin constituent member 38 are pushed by an eject pin when the first bobbin constituent member 38 is molded. A pressed mark 49 is arranged.

  The outer diameter D1 of the annular portion 40a of the end plate portion 40 in the first bobbin constituting member 38 is set smaller than the outer diameter D2 of the annular yoke portion 15a by an amount corresponding to the outer burr 14a of the magnetic steel plate 14. The outer edge 47a of the first protrusion 47 along the radial direction of the stator core 15 is formed along the outer periphery of the annular portion 40a of the first bobbin constituent member 38.

  With reference to FIG. 2, the inner edge 15ba of the tooth portion 15b along the radial direction of the stator core 15 is formed along the first virtual circle C1 centering on the rotation axis of the rotor 19, and has a first bobbin configuration. The inner edge 40ba along the radial direction of the tooth portion corresponding portion 40b of the member 38 and the inner edge 48a along the radial direction of the second protrusion 48 projecting from the end plate portion 40 are rotated by the rotor 19. It is formed along the second virtual circle C2 having a larger diameter than the first virtual circle C1 by the amount of the burr 14a of the inner edge 15ba of the tooth portion 15b with the axis as the center.

  In FIG. 5, at least a part of the unit case 7 that supports the Wesco pump 5 and the brushless motor 6 in common, in this embodiment, all of the unit case 7 has the unit case 7 as an insert part. It is covered with a resin casing 51 to be molded.

  The casing 51 is at least electronically connected to the fuel supply device covering portion 51a covering the entire fuel supply device including the unit case 7 and the power supply terminal 20 supported by the first bobbin constituting member 38 of the bobbin 17. A control substrate covering portion 51b in which at least a part of the substrate 52 is embedded, a wiring covering portion 51c connecting the fuel supply device covering portion 51a and the control substrate covering portion 51b, and an intake system 53 of the fuel vehicle mounted engine The three attachment parts 51d, 51e, 51f fastened to the throttle body 54, which is an intake system component constituting the part, are integrally formed.

  The portion of the fuel supply device covering portion 51a that covers the outer end surface of the pump housing 11 on the side of the Wesco pump 5 covers the suction pipe 12a so as to communicate with the suction port 29 (see FIG. 1). A connecting pipe 55 and a deaeration pipe 56 communicating with the deaeration hole 31 opened in the outer end surface of the pump housing 11 are integrally projected. A filter 57 for filtering fuel sucked into the Wesco pump 5 is connected to the suction side connection pipe 55, and a cylindrical attachment pipe portion 57 a provided in the filter 57 is a suction side connection pipe 55. The locking projections 58 that are detachably fitted to the suction-side connecting pipe 55 and project at a plurality of circumferential positions on the outer periphery of the suction side connecting pipe 55 are engaged with and disengaged from the plurality of locking holes 59 provided in the mounting pipe section 57a. Engageable. The filter 57 is connected with a fuel conduit 60 for guiding fuel, and the deaeration pipe 56 is connected with a deaeration conduit 61 with a binding band 62.

  A discharge port 63 communicating with the fuel discharge port 34 (see FIG. 1) is formed in a portion of the fuel supply device cover portion 51a that covers the first cover portion 21 on the brushless motor 6 side. A discharge-side connecting pipe 64 that covers 21a is integrally projected.

  The control board covering portion 51b is disposed below the fuel supply device covering portion 51a at a position biased toward the discharge port 63, and the fuel supply device covering portion 51a is interposed via the wire covering portion 51c. To be connected to. The electronic control board 52 has a cylindrical connector part 52a in which an external connector (not shown) is detachably connected, and the control part 52a is directed toward the Wesco pump 5 to perform the control. It is embedded in the control substrate covering portion 51b so as to protrude from the substrate covering portion 51b.

  Three bus bars 65 extending upward from the electronic control board 52 are embedded in the wiring covering portion 51c, and these bus bars 65 are three bus bars 66 extending in the fuel supply device covering portion 51a. Connected to each.

  The mounting portions 51d, 51e, and 51f are disposed at a total of three locations, two locations on both sides of the wiring coating portion 51c and one location connected to the lower portion of the control board coating portion 51b. Fastened to the throttle body 54.

  That is, at least a part of the electronic control board 52 is embedded in a resin casing 51 that covers at least a part of the unit case 7, and mounting portions 51 d, 51 e, 51 f that are fastened to the throttle body 54 are integrally provided. It is done.

  Next, the operation of this embodiment will be described. Of the first and second bobbin constituting members 38 and 39 that constitute the bobbin 17 in cooperation, at least a specific bobbin facing the protruding direction of the burr 14a on the stator core 15 side. Since a plurality of first and second protrusions 47 and 48 that abut against the stator core 15 are provided on the surface of the component member, in this embodiment, the first bobbin component member 38 that faces the stator core 15, The first bobbin constituent member 38 is damaged by the burr 14a on the stator core 15 side even when a molding pressure is applied when molding the first bobbin constituent member 38 and the resin first covering portion 21 that covers a part of the coil 16. This can be prevented, and the first bobbin constituting member 38 can be easily molded, and the brushless motor 6 can be downsized.

  The first and second bobbin constituting members 38 and 39 include an annular portion 40 a corresponding to the annular yoke portion 15 a of the stator core 15 and a plurality of tooth portion corresponding portions 40 b corresponding to the tooth portions 15 b of the stator core 15, and the stator core 15. The end plate portion 40 is disposed on both sides in the circumferential direction of the tooth portion 15b so as to be in contact with the end plate portion 40 opposite to the end surface thereof and the inner peripheral surface of the annular yoke portion 15a and the side surface of the tooth portion 15b. The annular yoke is formed so as to have an outer diameter D1 of the annular portion 40a of the first bobbin constituting member 38 corresponding to the burr 14a on the outer periphery of the magnetic steel plate 14. The radial direction of the stator core 15 of the first protrusion 47 set smaller than the outer diameter D2 of the portion 15a and protruding from the end plate portion 40 of the first bobbin component 38 The outer edge 47a along is formed along the outer periphery of the annular portion 40a of the first bobbin component 38 has. Thereby, it is possible to prevent the burr 14a on the outer peripheral side of the stator core 15 from damaging the first bobbin constituent member 38 while simplifying the shape of the first bobbin constituent member 38. That is, since the first bobbin constituting member 38 and a part of the coil 16 are covered with the first covering portion 21 from the side opposite to the stator core 15, it is not necessary to cover the outer periphery of the stator core 15 with the bobbin 17. It is possible to prevent the first bobbin constituent member 38 from being damaged by the burr 14a on the outer periphery of the magnetic steel plate 14 while simplifying the shape of the bobbin constituent member 38.

  Further, the inner edge 15ba of the tooth portion 15b along the radial direction of the stator core 15 is formed along the first virtual circle C1 centering on the rotation axis of the rotor 19, and the tooth portion of the first bobbin constituting member 38 is formed. The inner edge 40ba along the radial direction of the corresponding portion 40b and the inner edge 48a along the radial direction of the second protrusion 48 projecting from the end plate portion 40 are centered on the rotation axis of the rotor 19, and the Since the burr 14a of the inner edge 15ba of the tooth portion 15b is formed along the second virtual circle C2 having a diameter larger than that of the first virtual circle C1, the portion of the stator core 15 facing the rotor 19 is covered with the bobbin 17. It is possible to prevent the first bobbin constituent member 38 from being damaged by the burr 14 of the tooth portion 15b while simplifying the shape of the first bobbin constituent member 38 by utilizing the fact that it is not necessary.

  Further, since the first and second protrusions 47 and 48 are first arranged in pairs at the center between the plurality of body portions 41 of the first bobbin constituting member 38, the first and second protrusions 47 and 48 are orthogonal to the axis of the stator core 15. The first bobbin is configured such that the first and second protrusions 47 and 48 are arranged without difficulty in the tooth portion corresponding portion 40b which is a relatively wide area of the first bobbin constituting member 38 on the projection onto the plane to be projected. Molding of the component member 38 can be facilitated, and as a result, the brushless motor 6 can be reduced in size.

  In addition, since the first bobbin constituent member 38 is molded with the eject pin pin mark 49 when the first bobbin constituent member 38 is molded between the first and second protrusions 47 and 48, the tooth portion corresponding portion 40b of the first bobbin constituent member 38 is disposed. The eject pin pin mark 49 remains while avoiding the contact portion between the stator core 15 and the first bobbin component member 38, and the first bobbin component member 38 is not lifted off the stator core 15 by the press mark 49. In addition, it is possible to prevent the occurrence of insulation failure by preventing a gap from being formed between the first and second bobbin constituting members 38 and 39.

  Further, a resin casing 51 that covers at least a part of the unit case 7 that commonly supports the Wesco pump 5 that discharges the fuel of the vehicle-mounted engine and the brushless motor 6, uses the unit case 7 as an insert part. At least a part of an electronic control board 52 that is molded and is connected to the power supply terminal 20 supported by the bobbin 17 while being connected to the coil 16 is embedded in the casing 51, and the intake air of the engine Since the mounting portions 51d, 51e, 51f fastened to the throttle body 54 constituting a part of the system 53 are integrally provided, the fuel supply device including the Wesco pump 5 and the brushless motor 6 is handled as a single functional component. Can reduce the number of parts, improve assembly workability, and supply fuel Improvement of the assembling workability of the location is also possible.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, a plurality of magnetic steel plates laminated to form a stator core having a shape having an annular yoke portion and a tooth portion protruding radially inward from a plurality of locations spaced at equal intervals in the circumferential direction of the annular yoke portion. The cylindrical protrusions provided on the magnetic steel plates are coupled to each other at the portions corresponding to the tooth portions, and the protruding directions of the cylindrical protrusions fitted to each other are matched with the protruding direction of the burr. May be. By doing so, the cylindrical protrusions that are fitted to each other protrude into the gap between the first and second protrusions 47 and 48, and the cylindrical protrusion comes into contact with the first bobbin constituent member 38. There is nothing. That is, even in this case, the first bobbin constituting member 38 can be prevented from being damaged by the stator core, and the magnetic steel plate can be easily joined by the cylindrical protrusion.

5 ... Wesco pump 6 ... brushless motor 7 ... unit case 14 ... magnetic steel plate 14a ... burr 15 ... stator core 15a ... annular yoke part 15b ... tooth part 15ba ... -Inner edge 16 of tooth part ... Coil 17 ... Bobbin 18 ... Stator 19 ... Rotor 20 ... Power supply terminals 21, 22 ... Covering part 38 ... Specific bobbin constituent member First bobbin constituting member 39 ... bobbin constituting member 40 ... end plate part 40a ... annular part 40b ... tooth part corresponding part 40ba ... inner edge 41 of tooth part corresponding part ... trunk part 47 ... the first protrusion 47a ... the outer edge 48 of the first protrusion ... the second protrusion 48a ... the inner edge 49 of the second protrusion ... the trace 50 ... the protruding direction 51 ..・ Cases 51d, 51e, 51f.. Electronic control board 53... Intake system 54... Throttle body C1 that is an intake system part. First virtual circle C2... Second virtual circle D1. The outer diameter of the yoke

Claims (6)

  A plurality of magnetic steel plates in which a stator (18) of a brushless motor (6) having a rotor (19) connected to a pump (5) is laminated with the protruding direction (50) of the burr (14a) aligned in the same direction. (14) are connected to each other, and an annular yoke portion (15a) and tooth portions (15b) projecting radially inward from a plurality of locations spaced at equal intervals in the circumferential direction of the annular yoke portion (15a) are provided. The stator core (15) is composed of a stator core (15) formed in a shape and a pair of resin bobbin components (38, 39) that can be divided in the axial direction of the stator core (15). ), A coil (16) wound around the stator core (15) via the bobbin (17), and the pair of bobbin constituent members (38, 3). ) And a part of the coil (16) from the side opposite to the stator core (15), and molding the bobbin constituent members (38, 39) and a part of the coil (16) as insert parts. In the fuel supply apparatus constituted by the resin-made covering portions (21, 22) to be opposed to at least the protruding direction (50) of the burr (14a) of the pair of bobbin constituting members (38, 39). Protrusions (47, 48) that abut against the stator core (15) are provided on the surface of the specific bobbin constituting member (38) that faces the stator core (15). apparatus.   The pair of bobbin constituting members (38, 39) includes an annular portion (40a) corresponding to the annular yoke portion (15a) and a plurality of tooth portion corresponding portions (40b) corresponding to the tooth portions (15b). The end plate portion (40) facing the end surface of the stator core (15), the tooth portion (15b) in contact with the inner peripheral surface of the annular yoke portion (15a) and the side surface of the tooth portion (15b). A plurality of body portions (41) arranged on both sides in the circumferential direction of the end plate portion (40), and the annular portion (40a) of the specific bobbin component (38). ) Is set to be smaller than the outer diameter (D2) of the annular yoke portion (15a) by an amount corresponding to the burr (14a) on the outer periphery of the magnetic steel plate (14), and the specific bobbin Said component member (38) An outer edge (47a) of the first protrusion (47) projecting from the plate portion (40) along the radial direction of the stator core (15) has the annular portion (38) included in the specific bobbin component (38). The fuel supply device according to claim 1, wherein the fuel supply device is formed along the outer periphery of 40a). An inner edge (15ba) of the tooth part (15b) along the radial direction of the stator core (15) is formed along a first virtual circle (C1) centering on the rotation axis of the rotor (19), The inner edge (40ba) along the radial direction of the tooth portion corresponding portion (40b) of the specific bobbin constituent member (38) and the end plate portion (40) of the specific bobbin constituent member (38) are projected. The inner edge (48a) of the second protrusion (48) along the radial direction is centered on the rotational axis of the rotor (19), and the burr (14a) of the inner edge (15ba) of the tooth portion (15b). The fuel supply device according to claim 2 , wherein the fuel supply device is formed so as to be along the second virtual circle (C2) having a diameter larger than that of the first virtual circle (C1).   The first and second protrusions (47, 48) are arranged in a pair at the center between the plurality of body parts (41) of the specific bobbin component (38). The fuel supply device according to claim 3.   An eject pin at the time of molding the specific bobbin constituent member (38) between the first and second protrusions (47, 48) on the tooth portion corresponding portion (40b) of the specific bobbin constituent member (38). The fuel supply device according to claim 4, wherein a push mark (49) is arranged.   A resin casing (51) covering at least a part of a unit case (7) that commonly supports the pump (5) that discharges fuel of a vehicle-mounted engine and the brushless motor (6) includes the unit. Electronic control molded with the case (7) as an insert part and connected to the casing (51) at least to the power terminal (20) supported by the bobbin (17) while being connected to the coil (16) At least a part of the substrate (52) is embedded, and mounting portions (51d, 51e, 51f) fastened to an intake system component (54) constituting a part of the intake system (53) of the engine are integrally formed. It is provided, The fuel supply apparatus of any one of Claims 1-5 characterized by the above-mentioned.

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