WO2017057437A1 - ポンプ装置 - Google Patents

ポンプ装置 Download PDF

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Publication number
WO2017057437A1
WO2017057437A1 PCT/JP2016/078583 JP2016078583W WO2017057437A1 WO 2017057437 A1 WO2017057437 A1 WO 2017057437A1 JP 2016078583 W JP2016078583 W JP 2016078583W WO 2017057437 A1 WO2017057437 A1 WO 2017057437A1
Authority
WO
WIPO (PCT)
Prior art keywords
direction side
circuit board
rotor
disposed
pump device
Prior art date
Application number
PCT/JP2016/078583
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
京史 大坪
Original Assignee
日本電産サンキョー株式会社
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 日本電産サンキョー株式会社 filed Critical 日本電産サンキョー株式会社
Publication of WO2017057437A1 publication Critical patent/WO2017057437A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven

Definitions

  • the present invention relates to a pump device including a rotor disposed in a pump chamber and a stator disposed outside the pump chamber.
  • a pump device including a pump chamber in which an impeller and a rotor are disposed, and a stator and a circuit board that are disposed outside the pump chamber is known (for example, see Patent Document 1).
  • a partition wall is disposed between the stator and the circuit board and the pump chamber so as to prevent fluid from flowing into the arrangement position of the stator and the circuit board.
  • the partition includes an annular wall portion that is formed in a cylindrical shape and disposed between the rotor and the stator, and a disk-shaped plate-like wall portion that closes the lower end of the annular wall portion.
  • the rotor includes a driving magnet formed in a cylindrical shape.
  • the stator includes a stator core having a plurality of salient poles around which a driving coil is wound.
  • the drive magnet is disposed on the inner peripheral side of the annular wall portion
  • the stator core is disposed on the outer peripheral side of the annular wall portion, and is driven in the radial direction of the rotor.
  • the outer peripheral surface of the magnet for use and the tip surface of the salient pole of the stator core are opposed to each other via the annular wall portion.
  • the circuit board is formed in a flat plate shape, and is fixed to the plate-like partition wall so that the axial direction of the rotor and the thickness direction of the circuit board coincide with each other.
  • a Hall element for detecting the rotation angle of the rotor based on the magnetic force of the driving magnet is mounted on the circuit board.
  • the Hall element is arranged so that the magnetic sensitive surface of the Hall element faces the outer peripheral surface of the driving magnet via the annular wall portion.
  • This Hall element includes a magnetic sensing part on which a magnetic sensing surface is formed and an elongated terminal extending from the magnetic sensing part, and the distal end side of the elongated terminal is fixed by being soldered to a circuit board.
  • An object of the present invention is to provide a pump chamber in which a rotor having a drive magnet is disposed, a partition member disposed between a stator and a pump chamber disposed on the outer peripheral side of the rotor, and an outside of the pump chamber.
  • a detection element mounted on a circuit board in a pump device including a circuit board that is disposed and fixed to a bottom portion of a partition wall member and a detection element for detecting a rotation angle of a rotor based on a magnetic force of a driving magnet
  • a pump device capable of appropriately detecting the rotation angle of the rotor by the detection element even when the detection surface of the rotor faces the drive magnet in the axial direction of the rotor through the bottom of the partition wall member It is in.
  • a pump device includes an impeller, a rotor to which the impeller is attached and a driving magnet, a cylindrical shape that is disposed on the outer peripheral side of the rotor, and a driving coil.
  • a pump chamber in which an impeller and a rotor are disposed and fluid passes therethrough, a partition member disposed between the stator and the pump chamber to prevent inflow of fluid in the pump chamber to a position where the stator is disposed, and a pump A circuit board disposed outside the chamber, a detection element for detecting the rotation angle of the rotor based on the magnetic force of the driving magnet, and a resin sealing member made of resin that covers the stator and the circuit board.
  • the partition wall member includes a cylindrical portion disposed between the rotor and the stator, and a first direction end of the cylindrical portion.
  • the circuit board is fixed to the bottom portion by a fixing screw and disposed on the first direction side with respect to the bottom portion, and the detection element has a detection surface of the driving magnet through the bottom portion.
  • the circuit board is mounted on the circuit board so as to face the end surface on the one direction side, and a recess is formed on the bottom portion that is recessed from the first direction side surface of the bottom portion toward the second direction side, and a fixing screw is engaged.
  • a board fixing portion on which a mating screw portion is formed is formed in the recess, and a second direction end of the female screw portion is arranged on the second direction side with respect to the surface on the first direction side of the bottom portion.
  • the circuit board when one of the axial directions of the rotor is the first direction and the opposite direction of the first direction is the second direction, the circuit board is fixed to the bottom of the partition wall member by the fixing screw and the bottom
  • the detection element is mounted on the circuit board such that the detection surface of the detection element faces the end surface on the first direction side of the driving magnet via the bottom.
  • a concave portion that is recessed from the surface on the first direction side of the bottom portion toward the second direction side is formed on the bottom portion of the partition wall member, and a female screw portion that engages with a fixing screw is formed.
  • the substrate fixing portion is formed in the recess, and the second direction end of the female screw portion is disposed on the second direction side of the surface of the bottom portion on the first direction side. Therefore, in the present invention, it is possible to fix the circuit board to the bottom in a state where the circuit board is closer to the surface on the first direction side of the bottom, and the end surface on the first direction side of the driving magnet and the detection surface of the detection element It is possible to reduce the axial distance. Therefore, in the present invention, even if the density of magnetic flux generated from the drive magnet is low outside the drive magnet in the axial direction of the rotor, the rotation angle of the rotor can be appropriately detected by the detection element. That is, in the present invention, even when the detection surface of the detection element mounted on the circuit board faces the driving magnet in the axial direction through the bottom of the partition wall member, the rotation angle of the rotor is appropriately adjusted by the detection element. It becomes possible to detect.
  • the driving magnet is formed with a protruding portion that protrudes toward the first direction, and the protruding portion is formed in an annular shape around the axial center of the rotor, and the end surface of the protruding portion on the first direction side Is preferably opposed to the detection surface of the detection element through the bottom.
  • the bottom portion includes a flat plate portion formed in a flat plate shape, and a thin wall portion connected to the flat plate portion and having a thickness in the axial direction that is smaller than an axial thickness of the flat plate portion, and the first direction of the thin wall portion.
  • the surface on the side is disposed on the second direction side with respect to the surface on the first direction side of the flat plate portion, and the detection element is disposed on the first direction side of the thin portion. If comprised in this way, it will become possible to arrange
  • the detection surface of the detection element is disposed on the second direction side of the surface of the flat plate portion on the first direction side.
  • the concave portion is an annular groove portion surrounding the substrate fixing portion, and a reinforcing rib that connects the outer peripheral surface of the substrate fixing portion and the inner peripheral surface of the groove portion is formed in the groove portion.
  • a reinforcing rib that connects the outer peripheral surface of the substrate fixing portion and the inner peripheral surface of the groove portion is formed in the groove portion.
  • a plurality of ribs arranged at intervals in the circumferential direction of the groove portion be formed in the groove portion. If comprised in this way, it will become possible to suppress effectively a deformation
  • the plurality of ribs preferably connect the outer peripheral surface of the substrate fixing portion, the inner peripheral surface of the groove portion, and the bottom surface of the groove portion.
  • the partition member is formed by injection molding, and a plurality of gate traces are formed on the surface of the bottom portion in the first direction, and each of the plurality of gate traces includes a plurality of radial traces. It is preferable to be disposed at a position overlapping with each of the ribs.
  • a plurality of convex portions projecting in the first direction side are formed on the bottom portion, and a surface on the first direction side of the convex portion is a contact surface with which a surface on the second direction side of the circuit board abuts. It is preferable that If comprised in this way, it will become possible to stabilize the fixing state of the circuit board fixed to the bottom part of a partition member.
  • the board fixing portion is inserted into a fixing through hole formed at the center of the circuit board, and the through hole formed in the circuit board is formed on the surface of the board fixing portion in the first direction. It is preferable that a contact surface with which the surface on the second direction side, which is an edge portion, contacts is formed. If comprised in this way, it will become possible to stabilize the fixing state of the circuit board fixed to the bottom part of a partition member.
  • the pump chamber in which the rotor having the driving magnet is disposed, the partition member disposed between the stator and the pump chamber disposed on the outer peripheral side of the rotor, and the outside of the pump chamber Is mounted on the circuit board in a pump device comprising a circuit board disposed on the bottom of the partition wall member and fixed to the bottom of the partition wall member and a detection element for detecting the rotation angle of the rotor based on the magnetic force of the driving magnet Even when the detection surface of the element faces the driving magnet in the axial direction of the rotor via the bottom of the partition wall member, the rotation angle of the rotor can be appropriately detected by the detection element.
  • FIG. 2 is a perspective view of a circuit board, a stator, and a partition member shown in FIG. 1. It is an expanded sectional view which shows the E section of FIG. 1 from another direction. It is a perspective view of the lower end side part and bottom part of the cylindrical part of the partition member shown in FIG. It is a top view of the bottom part of the partition member shown in FIG.
  • FIG. 1 is a cross-sectional view of a pump device 1 according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of the circuit board 4, the stator 6, and the partition member 11 shown in FIG.
  • FIG. 3 is an enlarged cross-sectional view showing a portion E of FIG. 1 from another direction.
  • the upper side (Z1 direction side) in FIG. 1 is the “upper” side
  • the lower side (Z2 direction side) in FIG. 1 is the “lower” side.
  • the pump device 1 of this embodiment is a type of pump called a canned pump (canned motor pump), and includes an impeller 2, a motor 3 that rotates the impeller 2, and a circuit board 4 that controls the motor 3.
  • the motor 3 includes a rotor 5 and a stator 6.
  • the impeller 2, the motor 3, and the circuit board 4 are disposed inside a case body that includes a housing 7 and an upper case 8 that covers an upper portion of the housing 7.
  • the housing 7 and the upper case 8 are fixed to each other by screws not shown.
  • the upper case 8 is formed with a fluid suction portion 8a and a fluid discharge portion 8b.
  • a pump chamber 9 is formed between the housing 7 and the upper case 8 through which the fluid sucked from the suction portion 8a passes toward the discharge portion 8b.
  • a seal member (O-ring) 10 for securing the hermeticity of the pump chamber 9 is disposed at a joint portion between the housing 7 and the upper case 8.
  • the housing 7 includes a partition member 11 disposed between the pump chamber 9 and the stator 6 so as to separate the pump chamber 9 and the stator 6, and a resin-made resin sealing member 12 that covers a lower surface and a side surface of the partition member 11. And.
  • illustration of the resin sealing member 12 is abbreviate
  • the rotor 5 includes a substantially cylindrical driving magnet 14, a substantially cylindrical sleeve 15, and a holding member 16 that holds the driving magnet 14 and the sleeve 15.
  • the holding member 16 is formed in a substantially cylindrical shape with a hook.
  • the drive magnet 14 is fixed to the outer peripheral side of the holding member 16, and the sleeve 15 is fixed to the inner peripheral side of the holding member 16.
  • the impeller 2 is fixed to the flange portion 16a of the holding member 16 disposed on the upper side.
  • the impeller 2 and the rotor 5 are disposed inside the pump chamber 9.
  • the rotor 5 is rotatably supported on the fixed shaft 17.
  • the fixed shaft 17 is disposed so that the axial direction of the fixed shaft 17 coincides with the vertical direction. That is, the vertical direction is the axial direction of the rotor 5.
  • the upper end of the fixed shaft 17 is held by the upper case 8, and the lower end of the fixed shaft 17 is held by the housing 7.
  • the fixed shaft 17 is inserted through the inner peripheral side of the sleeve 15.
  • a thrust bearing member 18 that is in contact with the upper end surface of the sleeve 15 is attached to the fixed shaft 17.
  • the sleeve 15 functions as a radial bearing for the rotor 5
  • the sleeve 15 and the thrust bearing member 18 function as a thrust bearing for the rotor 5.
  • the drive magnet 14 has a protruding portion 14a that protrudes downward.
  • the projecting portion 14 a is formed in an annular shape centering on the axial center of the rotor 5 (that is, the axial center of the fixed shaft 17).
  • the lower surface of the protruding portion 14a is formed in a planar shape perpendicular to the vertical direction.
  • the protruding portion 14 a is formed at the outer peripheral end portion of the driving magnet 14, and the outer peripheral surface of the protruding portion 14 a constitutes the lower end side portion of the outer peripheral surface of the driving magnet 14.
  • the downward direction (Z2 direction) of the present embodiment is a first direction that is one of the axial directions of the rotor 5, and the upward direction (Z1 direction) is a second direction that is opposite to the first direction. It has become.
  • the partition member 11 is made of a resin material.
  • the partition member 11 is formed by injection molding.
  • the partition member 11 is formed in a substantially bottomed cylindrical shape with a flange, and includes a cylindrical portion 11b, a bottom portion 11c, and a flange portion 11d.
  • the cylindrical portion 11 b is formed in a cylindrical shape and is disposed so as to cover the outer peripheral surface of the driving magnet 14. That is, the cylindrical portion 11 b is disposed between the rotor 5 and the stator 6. Specifically, the cylindrical portion 11b is disposed between the rotor 5 and the stator 6 in the radial direction.
  • the bottom portion 11c closes the lower end of the cylindrical portion 11b.
  • the flange portion 11d is formed so as to spread outward from the upper end of the cylindrical portion 11b in the radial direction.
  • the inner side and the upper side of the partition member 11 serve as the pump chamber 9, and the impeller 2 and the rotor 5 are disposed on the inner side and the upper side of the partition member 11.
  • the partition wall member 11 functions to prevent the fluid in the pump chamber 9 from flowing into the locations where the stator 6 and the circuit board 4 are disposed.
  • the stator 6 includes a drive coil 23, a stator core 24, and an insulator 25, and is formed in a cylindrical shape as a whole. Specifically, the stator 6 is formed in a substantially cylindrical shape. The stator 6 is disposed on the outer peripheral side of the rotor 5 via the cylindrical portion 11b, and the stator 6 is disposed so that the axial direction of the stator 6 coincides with the vertical direction. That is, the vertical direction is the axial direction of the stator 6. In addition, the stator 6 includes a plurality of terminal pins 26 that are electrically connected with the ends of the drive coil 23 being entangled.
  • the radial direction of the rotor 5 and the stator 6 is referred to as “radial direction”, and the circumferential direction (circumferential direction) of the rotor 5 and the stator 6 is referred to as “circumferential direction”.
  • illustration of the terminal pin 26 is abbreviate
  • the stator core 24 is a laminated core formed by laminating thin magnetic plates made of a magnetic material.
  • the stator core 24 includes an outer peripheral ring portion formed in an annular shape and a plurality of salient pole portions protruding from the outer peripheral ring portion toward the inside in the radial direction.
  • the stator core 24 of this embodiment includes six salient pole portions.
  • the six salient pole portions are formed at an equiangular pitch, and are arranged at a constant pitch in the circumferential direction.
  • the tip surface (radial inner surface) of the salient pole part faces the outer peripheral surface of the drive magnet 14 via the cylindrical part 11b.
  • the number of salient pole portions of the stator core 24 may be other than six. Further, the stator core 24 may not be a laminated core.
  • the insulator 25 is made of an insulating material such as resin.
  • the insulator 25 is attached to each salient pole portion of the stator core 24, and the stator 6 includes six insulators 25. Further, the insulator 25 is formed in a cylindrical shape with a flange having flange portions at both ends, and the salient pole portion is formed so that the axial direction of the insulator 25 formed in a cylindrical shape and the radial direction of the stator 6 coincide with each other. It is attached.
  • the insulator 25 includes a first insulator 30 and a second insulator 31 that can be divided in the vertical direction. The first insulator 30 disposed on the lower side and the second insulator 31 disposed on the upper side are provided. The insulator 25 is formed by combining.
  • the upper end portion of the terminal pin 26 is press-fitted and fixed to the first insulator 30, and the lower end portion of the terminal pin 26 protrudes downward from the first insulator 30.
  • the driving coil 23 is composed of a conductive wire made of an aluminum alloy or a copper alloy.
  • the driving coil 23 is wound around the salient pole portion of the stator core 24 via an insulator 25.
  • One end of the drive coil 23 is entangled and fixed to one of the two terminal pins 26 fixed to the first insulator 30, and the other end of the drive coil 23 is connected to the two terminal pins 26. It is entangled with the other and fixed.
  • the circuit board 4 is a rigid board such as a glass epoxy board, and is formed in a flat plate shape.
  • the circuit board 4 is disposed below the drive coil 23, the stator core 24, and the insulator 25 so that the thickness direction of the circuit board 4 coincides with the vertical direction. Further, the circuit board 4 is disposed below the bottom 11 c of the partition wall member 11. That is, the circuit board 4 is disposed outside the pump chamber 9. Further, the circuit board 4 is fixed to the bottom portion 11 c of the partition wall member 11 with fixing screws 34. The lower end portion of the terminal pin 26 is fixed to the circuit board 4 by soldering.
  • a connector 27 is mounted at one place on the outer peripheral side of the circuit board 4. In addition, illustration of the connector 27 is abbreviate
  • a detection element 28 for detecting the rotation angle of the rotor 5 based on the magnetic force of the driving magnet 14 is mounted on the circuit board 4.
  • the detection element 28 is a Hall element. Therefore, hereinafter, the detection element 28 is referred to as a “Hall element 28”.
  • the Hall element 28 is a surface mount type Hall element.
  • the Hall element 28 is mounted on the circuit board 4 so that the magnetic sensitive surface 28a (see FIG. 3), which is a detection surface, faces upward.
  • the motor 3 of this embodiment is a three-phase motor, and three Hall elements 28 are mounted on the circuit board 4 as shown in FIG.
  • the three Hall elements 28 are arranged concentrically with respect to the axial center of the rotor 5 when viewed from above and below. In FIG. 1, the Hall element 28 is not shown.
  • the resin sealing member 12 is provided to completely cover the circuit board 4 and the driving coil 23 and to protect the circuit board 4 and the driving coil 23 from the fluid.
  • the resin sealing member 12 is formed by injecting a resin material onto the partition wall member 11 in a state where the circuit board 4 and the stator 6 are fixed. Specifically, the partition member 11 to which the circuit board 4 and the stator 6 are fixed is placed in a mold, and a resin material is injected into the mold and cured to form the resin sealing member 12. Yes.
  • the resin sealing member 12 is formed in a substantially bottomed cylindrical shape as a whole, and completely covers the circuit board 4, the stator 6, the cylindrical portion 11b, and the bottom portion 11c. Moreover, the resin sealing member 12 covers the lower surface of the flange portion 11d.
  • FIG. 4 is a perspective view of the lower end side portion and the bottom portion 11c of the cylindrical portion 11b of the partition wall member 11 shown in FIG.
  • FIG. 5 is a plan view of the bottom 11c of the partition wall member 11 shown in FIG.
  • the bottom 11c includes a columnar protrusion 11e that protrudes upward from the center of the bottom 11c (see FIGS. 1 and 3).
  • the protruding portion 11e is formed so that the axial center of the protruding portion 11e and the axial center of the rotor 5 (that is, the axial center of the fixed shaft 17) substantially coincide.
  • the bottom portion 11c is connected to the lower end of the outer peripheral surface of the protruding portion 11e and is disposed at the outer end of the flat plate-like and annular flat plate portion 11f arranged outside the protruding portion 11e in the radial direction and the outer end of the flat plate portion 11f in the radial direction.
  • a flat plate-like and annular thin-walled portion 11g that is connected and arranged outside the flat plate portion 11f in the radial direction is provided.
  • the outer peripheral end of the thin part 11g is connected to the lower end of the cylindrical part 11b.
  • the flat plate portion 11f is arranged so that the thickness direction of the flat plate portion 11f matches the vertical direction
  • the thin wall portion 11g is arranged so that the thickness direction of the thin wall portion 11g matches the vertical direction.
  • the flat plate portion 11f and the thin wall portion 11g constitute a lower end portion of the bottom portion 11c.
  • the upper surface of the flat plate part 11f and the upper surface of the thin part 11g are formed in a planar shape perpendicular to the vertical direction.
  • the upper surface of the flat plate part 11f and the upper surface of the thin part 11g are the same plane.
  • the thickness (thickness in the vertical direction) of the thin-walled portion 11g is thinner than the thickness (thickness in the vertical direction) of the flat plate portion 11f.
  • the lower surface 11h of the thin portion 11g is disposed above the lower surface 11j of the flat plate portion 11f.
  • the lower surface 11h and the lower surface 11j constitute the lower surface of the bottom portion 11c.
  • An inclined surface that connects the lower surface 11h and the lower surface 11j is formed between the lower surface 11h and the lower surface 11j in the radial direction.
  • the upper end side portion of the protruding portion 11 e is disposed on the inner peripheral side of the lower end side portion of the holding member 16.
  • a circular recess 11k that is recessed downward from the center of the upper end surface of the protrusion 11e is formed.
  • the lower end portion of the fixed shaft 17 is inserted and fixed in the recess 11k, and the lower end portion of the fixed shaft 17 is held by the upper end portion of the protruding portion 11e.
  • a concave portion 11n that is recessed upward from the lower surface 11j of the flat plate portion 11f is formed.
  • a board fixing part 11p for fixing the circuit board 4 is formed in the recess 11n.
  • the substrate fixing part 11p is formed in a cylindrical shape.
  • the substrate fixing portion 11p is formed so as to protrude downward from the bottom surface (upper surface) of the concave portion 11n formed in a planar shape orthogonal to the vertical direction.
  • the tip (lower end) of the substrate fixing portion 11p protrudes downward from the lower surface 11j.
  • the substrate fixing portion 11p is formed so that the axis center of the substrate fixing portion 11p and the axis center of the rotor 5 coincide.
  • the concave portion 11n is formed so that the shape of the inner peripheral surface (the outer surface in the radial direction) of the concave portion 11n when viewed in the up-down direction is a circular shape. Further, when viewed from the vertical direction, the inner peripheral surface of the recess 11n and the outer peripheral surface of the substrate fixing portion 11p are formed concentrically with respect to the axial center of the rotor 5, and the recess 11n is formed of the substrate fixing portion. It is an annular groove that surrounds 11p. Specifically, the recess 11n is an annular groove that surrounds the entire circumference of the substrate fixing portion 11p. The inner peripheral surface of the recess 11n and the lower surface 11j are connected via a convex curved surface 11q. As shown in FIG. 3, the inner diameter of the recess 11 n is larger than the outer diameter of the fixed shaft 17.
  • Reinforcing ribs 11r that connect the outer peripheral surface of the substrate fixing portion 11p and the inner peripheral surface of the concave portion 11n are formed in the concave portion 11n. That is, the rib 11r is formed so as to connect the outer peripheral surface of the substrate fixing portion 11p, the inner peripheral surface of the concave portion 11n, and the bottom surface of the concave portion 11n.
  • the rib 11r is formed in a flat plate shape. In this embodiment, as shown in FIG. 5, the three ribs 11 r are formed in a state where they are spaced apart in the circumferential direction of the recess 11 n, and the three ribs 11 r are located with respect to the axial center of the rotor 5. Are arranged radially.
  • a female screw portion 11s with which a fixing screw 34 is engaged is formed on the inner peripheral surface of the substrate fixing portion 11p.
  • the female screw portion 11s is formed upward from the lower end of the substrate fixing portion 11p.
  • the upper end of the female screw portion 11s is disposed above the lower surfaces 11h and 11j.
  • the upper end of the fixing screw 34 that engages with the female screw portion 11s is also disposed above the lower surfaces 11h and 11j.
  • the length of the female screw portion 11s in the vertical direction is such that the fixing screw 34 can be sufficiently screwed into the substrate fixing portion 11p of the resin partition wall member 11.
  • the vertical length of the substrate fixing portion 11p is longer than the vertical length of the female screw portion 11s.
  • the front end (lower end) of the board fixing part 11p is inserted into a fixing through hole formed at the center of the circuit board 4.
  • An abutting surface 11t with which the upper surface of the circuit board 4 abuts is formed on the front end side (lower end side) of the substrate fixing portion 11p. That is, the contact surface 11t with which the surface on the second direction which is the edge portion of the through hole formed in the circuit board 4 contacts is formed on the surface on the first direction side of the substrate fixing portion 11p.
  • the contact surface 11t is formed in a planar shape perpendicular to the vertical direction.
  • the contact surface 11t is formed in an annular shape.
  • positioning protrusions 11u for positioning the circuit board 4 are formed so as to protrude downward.
  • the positioning projection 11u is formed in a stepped columnar shape.
  • the leading end (lower end) of the positioning projection 11u is inserted into a positioning through hole formed in the circuit board 4.
  • An abutting surface 11v with which the upper surface of the circuit board 4 abuts is formed on the distal end side (lower end side) of the positioning projection 11u.
  • the contact surface 11v is formed in a planar shape perpendicular to the vertical direction and is formed in an annular shape.
  • the convex portion 11w is formed in a disc shape, and the lower surface of the convex portion 11w is formed in a planar shape perpendicular to the vertical direction.
  • the lower surface of the convex portion 11w is an abutting surface 11x with which the upper surface of the circuit board 4 abuts.
  • the contact surface 11t, the contact surface 11v, and the contact surface 11x are arranged on the same plane.
  • the positioning protrusion 11 u and the two protrusions 11 w are disposed concentrically with respect to the axial center of the rotor 5 when viewed from the vertical direction. Further, the positioning projections 11 u and the two convex portions 11 w are arranged at an equiangular pitch with respect to the axial center of the rotor 5.
  • the positioning protrusions 11u and the two convex portions 11w are arranged at positions substantially equal to the center position in the circumferential direction between the three ribs 11r.
  • three gate traces 11y which are traces of a mold gate for forming the partition wall member 11 by injection molding, are formed.
  • the three gate traces 11y are arranged concentrically with respect to the axial center of the rotor 5 when viewed from above and below.
  • the positioning projections 11u, the two protrusions 11w, and the three gate traces 11y are arranged concentrically with respect to the axial center of the rotor 5 when viewed from the vertical direction.
  • the gate mark 11y is disposed at the same position as the rib 11r in the circumferential direction. That is, each of the three gate traces 11y is arranged at a position overlapping with each of the three ribs 11r in the radial direction.
  • the circuit board 4 is fixed to the circuit board 4 in a state where the upper surface of the circuit board 4 is in contact with the contact surfaces 11t, 11v, and 11x and is positioned by the distal end portion of the board fixing portion 11p and the positioning protrusion 11u. It is fixed to a fixing screw 34 screwed into the portion 11p.
  • the magnetic sensitive surface 28a of the Hall element 28 faces the lower surface of the driving magnet 14 via the bottom portion 11c.
  • the magnetosensitive surface 28a faces the lower surface of the protruding portion 14a of the driving magnet 14 via the bottom portion 11c.
  • the hall element 28 is disposed below the thin portion 11g. That is, the Hall element 28 is disposed below the lower surface 11h of the thin portion 11g.
  • the magnetosensitive surface 28a is disposed above the lower surface 11j of the flat plate portion 11f.
  • the circuit board 4 is fixed to the bottom part 11c of the partition wall member 11 by the fixing screws 34, and is disposed below the bottom part 11c, and is mounted on the circuit board 4.
  • the magnetosensitive surface 28a of 28 faces the lower end surface of the driving magnet 14 through the bottom 11c.
  • a recess 11n that is recessed upward from the lower surface 11j of the flat plate portion 11f is formed in the bottom portion 11c, and a substrate fixing portion 11p is formed in the recess 11n.
  • the female screw portion 11s with which the fixing screw 34 engages is formed in the substrate fixing portion 11p, and the upper end of the female screw portion 11s is arranged above the lower surfaces 11h and 11j.
  • the circuit board 4 can be fixed to the bottom portion 11c in a state where it is closer to the lower surfaces 11h and 11j, and the upper and lower surfaces of the lower end surface of the driving magnet 14 and the magnetically sensitive surface 28a of the Hall element 28 are fixed. It is possible to reduce the direction distance. Therefore, in this embodiment, even if the density of the magnetic flux generated from the driving magnet 14 is low outside the driving magnet 14 in the vertical direction, the rotation angle of the rotor 5 can be appropriately detected by the Hall element 28.
  • the Hall element 28 causes the rotor 5 to It becomes possible to detect the rotation angle appropriately.
  • the magnetic sensitive surface 28a faces the lower surface of the protruding portion 14a of the driving magnet 14 protruding downward via the bottom portion 11c, the upper and lower sides of the driving magnet 14 and the magnetic sensitive surface 28a are It becomes possible to make the distance of a direction closer.
  • the Hall element 28 is disposed below the thin portion 11g, and is disposed above the lower surface 11j of the flat plate portion 11f. Therefore, the lower end surface and the magnetosensitive surface of the driving magnet 14 are disposed. It is possible to make the distance in the vertical direction closer to 28a closer. Therefore, in this embodiment, the rotation angle of the rotor 5 can be detected more appropriately by the Hall element 28.
  • a reinforcing rib 11r that connects the outer peripheral surface of the substrate fixing portion 11p and the inner peripheral surface of the concave portion 11n is formed in the concave portion 11n. Therefore, in this embodiment, it is possible to suppress deformation of the substrate fixing portion 11p when the fixing screw 34 is screwed into the female screw portion 11s. Further, in this embodiment, it is possible to suppress deformation of the substrate fixing portion 11p when the partition wall member 11 is formed by resin molding. In particular, in the present embodiment, since the three ribs 11r are arranged radially with respect to the axial center of the rotor 5, it is possible to effectively suppress the deformation of the substrate fixing portion 11p.
  • the partition wall member 11 is formed by injection molding, and three gate traces 11y are formed at positions overlapping with the three ribs 11r in the radial direction. For this reason, it is possible to further secure a resin flow path when molding the substrate fixing portion 11p and the protruding portion 11e, and to further suppress molding defects due to insufficient filling of the substrate fixing portion 11p and the protruding portion 11e.
  • the upper surface of the circuit board 4 is fixed to the bottom portion 11c in a state of being in contact with the contact surfaces 11t, 11v, and 11x. Therefore, in this embodiment, it is possible to stabilize the fixed state of the circuit board 4 fixed to the bottom portion 11c. Further, in this embodiment, since the substrate fixing portion 11p is disposed in the concave portion 11n forming the annular groove portion, even if the substrate fixing portion 11p is deformed when the fixing screw 34 is screwed into the female screw portion 11s. The deformed substrate fixing portion 11p does not affect the peripheral portion of the substrate fixing portion 11p.
  • the protrusion 14 a of the drive magnet 14 is formed at the outer peripheral end portion of the drive magnet 14.
  • the protruding portion 14a is formed at the inner peripheral end portion of the driving magnet 14.
  • it may be formed at an intermediate portion of the drive magnet 14 in the radial direction. Further, as long as the rotation angle of the rotor 5 can be appropriately detected by the Hall element 28, the projecting portion 14 a may not be formed on the driving magnet 14.
  • the outer peripheral end portion of the bottom portion 11c is the thin portion 11g.
  • the intermediate portion of the bottom portion 11c in the radial direction may be the thin portion 11g.
  • the hall element 28 can appropriately detect the rotation angle of the rotor 5, the thin portion 11g may not be formed on the bottom portion 11c.
  • the upper surface of the flat plate portion 11f and the upper surface of the thin portion 11g are coplanar, but the upper surface of the flat plate portion 11f and the upper surface of the thin portion 11g may be displaced in the vertical direction.
  • the upper surface of the thin portion 11g may be disposed below the upper surface of the flat plate portion 11f.
  • the detection element for detecting the rotation angle of the rotor 5 based on the magnetic force of the driving magnet 14 is the Hall element 28, but the detection element is a magnetic detection element other than the Hall element 28. Also good.
  • the axis center of the substrate fixing portion 11p and the axis center of the rotor 5 coincide with each other, but the axis center of the substrate fixing portion 11p and the axis center of the rotor 5 may be shifted.
  • the three ribs 11r are formed in the recess 11n, but the number of ribs 11r formed in the recess 11n may be two, or four or more. In addition, the rib 11r may not be formed in the recess 11n as long as the deformation of the substrate fixing portion 11p can be suppressed.
  • the two convex parts 11w are formed in the lower surface 11j of the flat plate part 11f, the number of the convex parts 11w formed in the lower surface 11j may be one, and it is three or more. Also good.
  • the convex part 11w does not need to be formed in the lower surface 11j.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Brushless Motors (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
PCT/JP2016/078583 2015-09-30 2016-09-28 ポンプ装置 WO2017057437A1 (ja)

Applications Claiming Priority (2)

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JP2015193970A JP6652360B2 (ja) 2015-09-30 2015-09-30 ポンプ装置
JP2015-193970 2015-09-30

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JP2019157685A (ja) * 2018-03-09 2019-09-19 日本電産サンキョー株式会社 ポンプ装置

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JP2012070517A (ja) * 2010-09-22 2012-04-05 Nidec Sankyo Corp ポンプ装置
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CN106609761B (zh) 2019-03-12
CN106609761A (zh) 2017-05-03

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