WO2013065342A1 - ステータコアの製造方法及びステータコア - Google Patents

ステータコアの製造方法及びステータコア Download PDF

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Publication number
WO2013065342A1
WO2013065342A1 PCT/JP2012/060740 JP2012060740W WO2013065342A1 WO 2013065342 A1 WO2013065342 A1 WO 2013065342A1 JP 2012060740 W JP2012060740 W JP 2012060740W WO 2013065342 A1 WO2013065342 A1 WO 2013065342A1
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WO
WIPO (PCT)
Prior art keywords
core
mold
core block
magnetic pole
positioning
Prior art date
Application number
PCT/JP2012/060740
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
広田　穣
覚司 脇田
和彦 朴
橋本　昭
鵜飼　義一
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to IN4129CHN2014 priority Critical patent/IN2014CN04129A/en
Priority to BR112014009831A priority patent/BR112014009831A2/pt
Priority to JP2013541648A priority patent/JP5714122B2/ja
Priority to CN201280053298.1A priority patent/CN104025432B/zh
Publication of WO2013065342A1 publication Critical patent/WO2013065342A1/ja

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/12—Machines characterised by the bobbins for supporting the windings

Definitions

  • the present invention relates to a stator core manufacturing method and a stator core for manufacturing a stator core used in, for example, an electric motor or a generator of an automobile or the like.
  • a stator constituting a general electric motor or generator mounted on an automobile or the like includes a stator core and a stator winding wound around the stator core.
  • the stator core is wound with an annular yoke body, a core body having a plurality of magnetic teeth portions projecting from the inner circumferential surface of the yoke body radially inward in the circumferential direction, and a stator winding.
  • the main part of the core main body including the surface of the magnetic pole teeth part is covered, and an insulating member interposed between the stator winding and the main part of the core main body is provided.
  • an insulating film or the like that is provided on the core body by pasting or the like and covers the surface of the core body is used.
  • an insulating resin layer integrally molded at a desired portion of the core body by injection molding as an insulating member. ing.
  • FIG. 11 is a diagram for explaining a conventional method for manufacturing a core having an insulating member.
  • an injection mold is attached to the core body. The state of mold clamping is shown when the outer peripheral surface of the core body is viewed from the radial direction.
  • the core body 50 is configured by connecting a plurality of core block bodies 51 in a ring shape.
  • the core block main body 51 is configured by stacking a plurality of core pieces 54, and each of the core block main bodies 51 includes a yoke portion 52 that forms a part of the annular yoke body 60, and an intermediate portion of the yoke portion 52.
  • the above-mentioned magnetic teeth portion (not shown) that protrudes is provided.
  • the core main body 50 is comprised by connecting several core block main bodies 51 so that the magnetic pole teeth part may face inward and the yoke part 52 is arranged cyclically
  • a plurality of molds for injection molding are clamped to obtain an insulating resin layer. Is formed between the main part of the core body 50 including the surface of the magnetic pole teeth part around which the stator winding is wound and the mold. At this time, a plurality of molds that can form cavities that can be injection-molded at once for all the core block bodies 51 that constitute the core body 50 are used.
  • a gap is provided between the end face of the magnetic pole teeth portion.
  • the dies 55a and 55b are disposed on both sides of the core body 50 in the axial direction so as to contact the outer peripheral sides of both end surfaces of the yoke body 60 in the axial direction.
  • the insulating resin layer is integrally formed on the core body 50 by pouring and cooling the insulating resin melted by heating into the cavity.
  • the cavities are formed together with the other molds in a state where the molds 55a and 55b for injection molding are in contact with the outer peripheral portions of both end faces in the axial direction of the yoke body 60.
  • the insulating resin is formed between the core body 50 and the core block body 51 by one injection molding.
  • the mold 55a is only pressed against a part of the core block body 51, and the other cores There may be a gap between the yoke portion 52 of the block body 51 and the mold 55a. That is, when a plurality of molds for injection molding are clamped, a gap is formed between the cavity and the outer peripheral surface of the yoke body 60 (the outer peripheral surface of the core body 50). In some cases, the resin poured into the cavity leaks to the outer peripheral side of the yoke body 60. Thereby, in the manufactured stator core, there is a problem that unnecessary burrs or the like are generated in the insulating resin due to the resin leaked to the outer peripheral side of the yoke body 60.
  • the present invention has been made to solve the above problems, and a stator core manufacturing method capable of preventing unnecessary burrs from being generated in an insulating resin interposed between the stator winding and the core block body, and The object is to obtain a stator core.
  • the stator core manufacturing method is a stator core configured by annularly connecting a plurality of core blocks, each of the core blocks including a core block body and an insulating resin layer, and the core block body Is formed by laminating a plurality of core pieces in the axial direction, and the core block main body is disposed along the connecting direction of the core block, and the stator winding protrudes from the yoke portion.
  • a stator core manufacturing method having a magnetic teeth portion wound around a core block body, a step of forming a plurality of core block bodies, and an insulating resin layer for each core block body by injection molding And an injection molding process for integrally molding.
  • the insulating resin layer is formed for each core block body. For this reason, even if there is a variation in thickness in the core block body, among the molds used for injection molding, the mold that is placed against the yoke part is placed without forming a gap between it and the yoke part. Can be made. Accordingly, since the resin does not leak from between the mold and the end face of the yoke portion, the insulating resin layer can be molded as desired, and unnecessary burrs can be prevented from being formed in the insulating resin layer.
  • FIG. 2 is a sectional view taken along the line II-II in FIG. It is the principal part top view which looked at the stator core produced with the manufacturing method of the stator core which concerns on one embodiment of this invention from the axial direction. It is a figure explaining the manufacturing apparatus of the stator core used for the manufacturing method of the stator core which concerns on one embodiment of this invention.
  • FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4. It is the A section enlarged view of FIG.
  • FIG. 7 is a core block main body just before a mold unit is clamped
  • FIG. 7B shows the positional relationship between the core block body, the first mold, and the pedestal after the mold unit is clamped.
  • FIG. 7B shows the positional relationship between the core block body, the first mold, and the pedestal after the mold unit is clamped.
  • FIG. 1 is a cross-sectional view perpendicular to the axial direction of a stator having a stator core manufactured by a method for manufacturing a stator core according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a top view of the stator core produced by the stator core manufacturing method according to one embodiment of the present invention as seen from the axial direction.
  • FIG. 1 is a cross-sectional view perpendicular to the axial direction of a stator having a stator core manufactured by a method for manufacturing a stator core according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is a top view of the stator core produced by the stator core manufacturing method according to one embodiment of the present invention as seen from the axial direction.
  • FIG. 1 is a cross-sectional view perpendicular to the axial direction of a stator having a stator
  • the stator 1 includes an annular stator core 10 and stator windings 25 provided on the stator core 10 at intervals in the circumferential direction of the stator core 10.
  • the stator core 10 is configured by connecting a plurality of core blocks 11 in an annular shape.
  • the number of core blocks 11 is 14 here, the number of core blocks is not limited to this, and may be a multiple of 2 or a multiple of 3.
  • Each core block 11 has a yoke portion 13 disposed along the connecting direction of the core blocks 11, and a core block main body having a magnetic pole teeth portion 15 around which a stator winding 25 is wound. 12 and a predetermined portion of the surface of the core block body 12 including the surface of the magnetic pole tooth portion 15 around which the stator winding 25 is wound, and is interposed between the stator winding 25 and the core block body 12.
  • an insulating resin layer 18 is an insulating resin layer 18.
  • the yoke portion 13 is formed in a long block shape with a flat cross section.
  • the magnetic pole tooth portion 15 includes a teeth base portion 15a that protrudes with a predetermined width from an intermediate portion on one surface side of the yoke portion 13 over the entire length direction of the yoke portion 13, and a teeth base portion 15a extending from the tip of the teeth base portion 15a. And a pair of teeth flange portions 15b protruding on both sides in the width direction.
  • the 14 slots 17 are formed by a space defined by the adjacent magnetic pole tooth portion 15 and the yoke portion 13. More specifically, the slot 17 has an adjacent teeth base portion 15a, a teeth flange portion 15b extending from the teeth base portion 15a so that the tip faces each other, and a portion of the yoke portion 13 located between the adjacent tooth base portions 15a. It is formed by a space partitioned by And slot opening is formed between the front-end
  • a positioning recess 14 having a predetermined depth is formed on the other surface of the yoke portion 13 as shown in FIG.
  • the positioning recess 14 has an isosceles trapezoidal shape in a cross section orthogonal to the longitudinal direction of the yoke portion 13.
  • the width of the positioning recess 14 is gradually narrowed toward the bottom. That is, the wall surfaces on both sides in the width direction of the positioning recess 14 form a pair of first tapered surfaces 14a in which the distance between each other gradually decreases toward the bottom.
  • the angle between the pair of first tapered surfaces 14 a is defined as the taper angle of the positioning recess 14.
  • the front end surfaces of the pair of teeth flange portions 15b protruding from the teeth base portion 15a are formed as a pair of second tapered surfaces 16 whose widths become narrower with distance from the yoke portion 13 side.
  • the angle between the second tapered surfaces 16 is defined as the taper angle of the magnetic pole tooth portion 15.
  • Each core block body 12 is configured by stacking a plurality of core pieces 20 formed by punching a steel plate in the thickness direction. Each core block body 12 is arranged so that the stacking direction of the core pieces 20 coincides with the axial direction of the stator core 10.
  • Each core piece 20 is a plate having a yoke constituting part 21 constituting the yoke part 13 and a magnetic pole tooth constituting part 22 protruding from the yoke constituting part 21 and constituting the magnetic pole tooth part 15.
  • the cross-sectional shape orthogonal to the thickness direction of the core piece 20 is a shape in which one side is shortened out of the substantially parallel sides in the H shape.
  • the core block main body 12 is formed by laminating
  • connection between the core block bodies 12 is a well-known technique as described in, for example, Japanese Patent No. 4121008, and will not be described in detail.
  • connection between adjacent core block bodies (core members) is not described in detail. It passes through each of them and is rotatable around an axis parallel to the stacking direction of the core pieces.
  • the insulating resin layer 18 is injection-molded on the core block body 12 so as to cover the main surface of the core block body 12 including the surface of the magnetic pole tooth portion 15 around which the stator winding 25 is wound.
  • the insulating resin layer 18 is formed on the magnetic pole teeth 15 with respect to the stacking direction of the wall surface forming the slot 17 and the core piece 20 among the both sides in the width direction of the teeth base 15a and one surface of the yoke 13.
  • the core block body 12 is integrally formed so as to cover the main portions of both end faces.
  • FIG. 4 is a diagram for explaining a stator core manufacturing apparatus used in the method for manufacturing a stator core according to one embodiment of the present invention
  • FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, and
  • FIG. It is an A section enlarged view. 4 to 6, the injection molding apparatus 30 includes a pedestal 31 and a mold unit 40.
  • the pedestal 31 has a substantially trapezoidal cross section perpendicular to the thickness direction.
  • a positioning convex portion 32 that can be fitted into the positioning concave portion 14 formed in the yoke portion 13 protrudes from the support surface 31 a represented by the upper base of the trapezoid.
  • the cross-sectional shape of the positioning convex portion 32 is an isosceles trapezoid whose width gradually decreases toward the tip in the protruding direction.
  • the pair of wall surfaces of the positioning convex portion 32 represented by a straight line connecting the upper base and the lower base of the isosceles trapezoidal cross section has a pair of gaps that gradually narrow toward each other toward the tip of the positioning convex portion 32. It becomes the 3rd taper surface 32a.
  • the angle between the pair of third tapered surfaces 32 a is defined as the taper angle of the positioning convex portion 32.
  • the taper angle of the positioning convex part 32 and the taper angle of the positioning concave part 14 formed in the yoke part 13 are formed to coincide with each other.
  • the width of the distal end portion of the positioning convex portion 32 is slightly narrower than the width of the opening portion of the positioning concave portion 14. And when the positioning convex part 32 and the positioning recessed part 14 are mutually fitted, it fits in the state which the wall surfaces of the opposing positioning convex part 32 and the positioning recessed part 14 contacted each other.
  • a core abutting portion 33 for supporting a part of the core block body 12 protrudes from a portion near one end of the support surface 31 a as shown in FIG. 5. .
  • the pedestal 31 is arranged with the lower bottom side facing downward.
  • the mold unit 40 is for forming a desired cavity in the single core block body 12 and integrally molding the insulating resin layer 18 in the core block body 12 by injection molding.
  • the fifth molds 41 to 45 are provided. Although not shown, any one of the first mold 41 to the fifth mold 45 includes an insulating resin in a cavity formed between the first mold 41 to the fifth mold 45 and the core block 11. A flow path for pouring molten resin for forming the layer 18 is formed.
  • the first mold 41 is formed with respect to the core block body 12 arranged at a predetermined injection molding position.
  • the fifth mold 45 is configured to be movable in the direction described below.
  • the predetermined injection molding position of the core block main body 12 is a position in a state where a part of the yoke portion 13 is applied to the core contact portion 33 and the positioning convex portion 32 and the positioning concave portion 14 are fitted together. Injection molding is performed on the core block main body 12 disposed at the injection molding position.
  • the first mold 41 is configured to be movable in a direction opposite to the protruding end surface of the magnetic pole tooth portion 15 from the yoke portion 13.
  • die 42 is comprised so that a movement in the direction opposite to the one side surface of the width direction of the teeth base 15a is possible.
  • die 43 is comprised so that a movement in the direction opposite to the other side surface of the width direction of the teeth base 15a is possible.
  • die 44 is comprised so that a movement in the direction facing the one end surface of the magnetic pole teeth part 15 when the core block main body 12 is arrange
  • die 44 is comprised by the 1st division
  • the first split mold part 44a and the second split mold part 44b can be moved separately.
  • the first divided mold portion 44 a is configured to press the yoke portion 13 of the core block main body 12 disposed at a predetermined injection molding position and press it toward the pedestal 31.
  • the second split mold part 44b is disposed on the first mold 41 side of the first split mold part 44a and slides on the wall surface of the first split mold part 44a.
  • the fifth mold 45 is configured to be movable in a direction opposite to the other end face of the magnetic pole tooth portion 15 in the stacking direction of the core pieces 20.
  • the first mold 41 is formed with a mold-side recess 41 a that is fitted into a teeth flange 15 b located on the opposite side of the yoke section 13.
  • the mold-side recess 41a has a shape that matches the outer shape of the teeth flange 15b, and has a pair of fourth tapered surfaces 41b in which the width between them gradually decreases from the opening toward the bottom.
  • the angle between the pair of fourth taper surfaces 41 b is defined as the taper angle of the first mold 41.
  • the taper angle of the first mold 41 matches the taper angle of the magnetic pole tooth portion 15.
  • the width of the opening of the mold side recess 41a is slightly larger than the width of the protruding end of the magnetic pole tooth portion 15 from the yoke portion 13, in other words, the width of the teeth flange portion 15b on the inner peripheral surface side.
  • FIG. 7 is a view showing the main part of the stator core manufacturing apparatus used in the stator core manufacturing method according to one embodiment of the present invention.
  • FIG. 7 (a) shows a state immediately before the mold unit is clamped.
  • FIG. 7B shows the positional relationship between the core block body, the first mold, and the pedestal after the mold unit is clamped.
  • FIG. 8 is a cross-sectional view for explaining the injection molding process of the stator core manufacturing method according to the embodiment of the present invention. A cavity is formed between the core block body and the mold unit by the clamping operation of the mold unit. It shows how it was formed.
  • FIG. 7 is a view showing the main part of the stator core manufacturing apparatus used in the stator core manufacturing method according to one embodiment of the present invention.
  • FIG. 7 (a) shows a state immediately before the mold unit is clamped.
  • FIG. 7B shows the positional relationship between the core block body, the first mold, and the pedestal after the mold unit is clamped.
  • FIG. 9 is a cross-sectional view for explaining the injection molding process of the stator core manufacturing method according to one embodiment of the present invention, in which an insulating resin layer is molded in the cavity formed between the core block body and the mold unit. Is shown. 10 is a cross-sectional view for explaining the winding process of the stator winding performed after the stator core is manufactured by the stator core manufacturing method according to one embodiment of the present invention.
  • stator core manufacturing method first, a plurality of core block bodies 12 each formed by laminating the core pieces 20 are arranged in a state where the end portions are connected to each other via the connecting portion.
  • description is abbreviate
  • the injection molding of the insulating resin layer 18 is performed for each core block body 12.
  • the plurality of core block bodies 12 are arranged along the pedestal 31 in a state of being connected to each other. And about the core block main body 12 used as the object which integrally molds the insulating resin layer 18, as shown to (a) of FIG.
  • the first mold 41 is arranged so that the end of the teeth flange 15b and the mold-side recess 41a face each other in the direction in which the magnetic pole teeth 15 protrude from the section 13, and the positioning protrusion 32 and the positioning recess 14 face each other. And the pedestal 31.
  • the core block main body 12 is disposed so that the outer peripheral side of the core piece 20 disposed at one end of the yoke portion 13 is applied to the core contact portion 33 in the stacking direction of the core pieces 20. Is done.
  • the plurality of core block main bodies 12 are rotatable around an axis passing through a connecting portion that connects the core block main bodies 12 to each other, and are adjacent to the core block main bodies 12 disposed on the support surface 31a.
  • the core block body 12 can be disposed along the slope of the pedestal 31.
  • the core block main body 12 is arranged on the pedestal 31 so that the tip of the magnetic pole tooth portion 15 faces the outside of the support surface 31a.
  • the first die 41 to the fifth die 45 are provided in the protruding end face of the magnetic pole tooth portion 15 protruding from the yoke portion 13 and in the width direction of the magnetic pole tooth portion 15.
  • the protruding end surface of the magnetic tooth portion 15 corresponds to the wall surface of the teeth flange portion 15 b that forms the inner peripheral side of the stator core 10.
  • the mold unit 40 is clamped by moving the first mold 41 to the fifth mold 45 toward the respective surfaces of the opposing magnetic pole teeth 15.
  • the protruding end side of the magnetic tooth portion 15 and the mold-side concave portion 41a are fitted together, and the positioning convex portion 32 and the positioning concave portion 14 are fitted together.
  • the core block body 12 is pushed toward the pedestal 31 by the moving force of the one mold 41.
  • the width of the bottom of the mold-side recess 41a is narrower than the width of the protruding end of the magnetic tooth portion 15, in other words, the width on the inner peripheral surface side of the tooth flange portion 15b. Further, the taper angle of the mold-side concave portion 41a and the taper angle of the magnetic pole tooth portion 15 coincide with each other. For this reason, when the magnetic teeth portion 15 is fitted in the mold side recess 41a, the magnetic teeth portion 15 is disposed with a gap between the protruding end of the magnetic pole tooth portion 15 and the bottom of the mold side recess 41a, and the core piece. As seen from the stacking direction of 20, the surface contact is made on both side surfaces in the width direction of the mold side recess 41a.
  • the width of the bottom of the positioning recess 14 is narrower than the width of the tip of the positioning protrusion 32. Further, the taper angle of the positioning concave portion 14 and the taper angle of the positioning convex portion 32 are the same. For this reason, the positioning recess 14 is disposed with a gap between the bottom of the positioning recess 14 and the tip of the positioning projection 32 when fitted to the positioning projection 32, and the core piece 20 is stacked in the stacking direction. From the viewpoint of contact, both sides of the positioning convex portion 32 in the width direction are in surface contact.
  • the core block body 12 is accurately positioned at a predetermined injection molding position by fitting between the mold side recess 41a and the protruding end side of the magnetic pole tooth portion 15 and between the positioning recess 14 and the positioning projection 32.
  • a cavity 48 is formed between the first mold 41 to the fifth mold 45 and the core block body 12.
  • the first divided mold portion 44a and the fifth mold 45 of the fourth mold 44 forming a part of the cavity 48 are in the stacking direction of the core pieces 20 (hereinafter referred to as the thickness direction of the core block body 12). ) Is disposed so as to be pressed against one end surface and the other end surface of the yoke portion 13.
  • the molten resin is poured into the cavity 48 as shown in FIG.
  • the insulating resin layer 18 is formed integrally with the core block body 12, whereby the core block 11 is obtained.
  • the core block 11 is moved along the wall surface of the base 31 together with the core block body 12 before the injection molding of the insulating resin layer 18. Can be shifted.
  • the insulating resin layer 18 is similarly formed on the remaining core block main body 12 by injection molding for each core block main body 12. Since the insulating resin layer 18 is formed for each core block main body 12, when the mold unit 40 is clamped, a part of the fourth mold 44 and the fifth mold 45 is replaced with a yoke portion in the stacking direction of the core pieces 20. 13 can be brought into a state of being surely pressed against both end faces. For this reason, even if the thickness of each core block body 12 varies, no gap is formed between the fourth mold 44 and the fifth mold 45 and the yoke portion 13.
  • the stator core 10 can be obtained.
  • stator windings 25 are provided in a concentrated distributed winding method on each magnetic tooth portion 15 of the core block 11 including the core block body 12 integrally formed with the insulating resin layer 18. (Wounding process of stator winding 25). Furthermore, the stator 1 can be obtained by connecting the core block 11 around which the stator winding 25 is wound in an annular shape.
  • the stator core manufacturing method of the present invention in the injection molding process in which the insulating resin layer 18 is formed integrally with the core block body 12, the insulating resin layer 18 is formed for each core block body 12. For this reason, when the mold unit for injection molding is clamped, a part of the mold unit can be reliably pressed against both end faces of the yoke portion 13 in the stacking direction of the core pieces 20. Specifically, a part of the fourth mold 44 and the fifth mold 45 can be reliably pressed against both end faces of the yoke portion 13.
  • the yoke portion 13 is sandwiched between the molds 41 to 45 used for injection molding so as to sandwich the yoke portion 13 therebetween.
  • the metal molds 44 and 45 to be applied can be reliably arranged without forming a gap between the yoke parts 13. Therefore, when the resin is poured into the cavity 48 during injection molding, the resin does not leak from between the fourth mold 44 or the fifth mold 45 and the yoke portion 13, so that the insulating resin layer 18 is as desired. Thus, it is possible to prevent unnecessary burrs from being formed, for example, by the insulating resin layer 18 protruding outside the yoke portion 13.
  • the mold unit 40 includes the first mold 41 to the fifth mold 45, and the core block body 12 is positioned in order to position the core block body 12 by performing mold clamping at the time of injection molding from five directions. Variations in the insulating resin layer caused by the pressure applied to can be prevented.
  • the positioning concave portion 14 formed in the yoke portion 13 is fitted to the positioning convex portion 32 formed in the pedestal 31 that supports the core block body 12, and the magnetic teeth portion 15 on the protruding end side from the yoke portion 13 is fitted. Since the core block main body 12 is positioned at the injection molding position by fitting the portion, in other words, the teeth flange 15b and the first mold 41, the core block main body 12 can be easily and accurately injection molded. Can be positioned.
  • stator core of the present invention a part of the injection molding die unit 40 used for forming the insulating resin layer 18 is formed, and the protruding end of the magnetic pole tooth part 15 protruding from the yoke part 13 is provided.
  • the projecting end side of the magnetic teeth portion 15 of the core block body 12 can be fitted into a mold side recess 41a formed in the first mold 41 provided to be movable in the opposite direction.
  • the yoke 13 has a positioning projection formed on a pedestal 31 provided at a position opposite to the first mold 41 in the moving direction of the first mold 41 at a predetermined portion opposite to the magnetic pole teeth 15.
  • a positioning concave portion 14 that can be fitted to 32 is formed.
  • the core block body 12 is sandwiched between the first mold 41 and the pedestal 31 by fitting the mold-side recess 41 a and the protruding end side of the magnetic pole tooth portion 15 together with the positioning protrusion 32 and the positioning recess 14. It is possible to arrange them at predetermined positions.
  • the mold side concave portion 41a and the protruding end side of the magnetic pole tooth portion 15 and the positioning convexity during the mold clamping operation of the first mold 41 Since the portion 32 and the positioning recess 14 can be fitted together and placed at a predetermined position between the first mold 41 and the base 31, the molded insulating resin layer 18 can be formed in a desired shape. it can.
  • the protruding end side of the magnetic teeth portion 15 protruding from the yoke portion 13 is formed in a tapered shape that gradually becomes narrower toward the protruding end when viewed from the stacking direction of the core pieces 20, and gradually toward the opening. It can be fitted into a mold-side recess 41a formed in a wide tapered shape. Thereby, at the time of the mold clamping operation of the first mold 41, the protruding end side of the magnetic pole tooth portion 15 and the mold side recess 41 a of the first mold 41 can be smoothly fitted together.
  • the positioning recess 14 is formed in a tapered shape whose width gradually increases toward the opening as viewed from the stacking direction of the core pieces 20, and the positioning protrusion 32 which is formed in a tapered shape whose width gradually decreases toward the end. Can be fitted. Thereby, at the time of the mold clamping operation
  • the mold side recess 41a has a shape in contact with both side surfaces in the width direction without any gap. For this reason, the core block body 12 can be more accurately positioned at a predetermined injection molding position by the clamping operation of the first mold 41. Therefore, generation of unnecessary burrs or the like in the insulating resin layer 18 to be injection-molded is further avoided, and the insulating resin layer 18 can be formed in a desired shape more accurately.
  • the positioning recess 14 is disposed with a gap between the bottom of the positioning recess 14 and the tip of the positioning projection 32 when fitted to the positioning projection 32, and viewed from the stacking direction of the core pieces 20.
  • the positioning convex portion 32 has a shape that is in contact with both side surfaces in the width direction without a gap. Also by this, the core block body 12 can be more accurately positioned at a predetermined injection molding position by the clamping operation of the first mold 41. Therefore, generation of unnecessary burrs or the like in the insulating resin layer 18 to be injection-molded is further avoided, and the insulating resin layer 18 can be formed in a desired shape more accurately.
  • the positioning convex portion 32 is formed on the pedestal 31, the positioning concave portion 14 is formed on the yoke portion 13, and the mold unit 40 is clamped to perform the positioning convex portion 32. It has been described that the core block body 12 is positioned at a predetermined injection molding position with the positioning recesses 14 fitted together. However, a positioning recess may be formed on the pedestal 31 and a positioning projection may be formed on the yoke portion 13 so that the recess of the pedestal 31 and the projection of the yoke portion 13 are fitted together.
  • the positioning convex portion and the positioning concave portion are formed in the yoke portion 13, the positioning convex portion and the positioning concave portion are fitted to the base 31 that supports the core block body 12, and the magnetic tooth portion 15 protrudes from the yoke portion 13.
  • the core block body 12 may be positioned at the injection molding position by fitting the end side portion (the teeth flange 15b) and the first mold 41.
  • the protruding end of the magnetic tooth portion 15 comes into surface contact with both side surfaces in the width direction of the mold side recess 41 a when viewed from the stacking direction of the core piece 20, and the positioning recess 14 Is projected on the protruding side of the magnetic tooth portion 15 described as being in surface contact with both side surfaces of the positioning convex portion 32 in the width direction when viewed from the stacking direction of the core pieces 20 when fitted to the positioning convex portion 32.
  • One of the positioning recesses 14 may be in surface contact with both side surfaces of the mold side recess 41a or both side surfaces of the positioning projections 32.
  • the magnetic pole teeth are not required.
  • the effect that the core block main body 12 is positioned at the injection molding position remains by fitting the projecting end side of the portion 15 and the mold side concave portion 41a and fitting the positioning convex portion 32 and the positioning concave portion 14.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2012/060740 2011-11-04 2012-04-20 ステータコアの製造方法及びステータコア WO2013065342A1 (ja)

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JP2013541648A JP5714122B2 (ja) 2011-11-04 2012-04-20 ステータコアの製造方法及びステータコア
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CN104836395A (zh) * 2014-02-12 2015-08-12 日本电产高科电机株式会社 树脂外壳的成型方法以及马达
CN104882977A (zh) * 2014-02-28 2015-09-02 日本电产高科电机株式会社 马达用定子及其制造方法
JP2015180150A (ja) * 2014-03-19 2015-10-08 マツダ株式会社 ステータコア、回転電機およびステータコアの製造方法
CN111322250A (zh) * 2018-12-13 2020-06-23 格兰富控股联合股份公司 泵机组

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CN110140280B (zh) * 2017-01-11 2021-11-16 三菱电机株式会社 旋转电机的定子和旋转电机的定子的制造方法
CN106992612B (zh) * 2017-03-20 2023-07-25 卧龙电气驱动集团股份有限公司 一种单相异步交流电机定子结构
WO2019049761A1 (ja) * 2017-09-06 2019-03-14 三菱電機株式会社 回転電機の固定子および固定子の製造方法

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JP2005006481A (ja) * 2003-06-16 2005-01-06 Asmo Co Ltd インシュレータ及びその製造方法
JP2007282469A (ja) * 2006-04-06 2007-10-25 Amotech Co Ltd 一体型ステータの製造方法、これを利用したラジアルコアタイプダブルローター方式のｂｌｄｃモーター及びその製造方法

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JP2001054245A (ja) * 1999-08-09 2001-02-23 Toshiba Corp モータのモールドコア
JP2002247788A (ja) * 2001-02-22 2002-08-30 Nidec Shibaura Corp 電動機
JP2005006481A (ja) * 2003-06-16 2005-01-06 Asmo Co Ltd インシュレータ及びその製造方法
JP2007282469A (ja) * 2006-04-06 2007-10-25 Amotech Co Ltd 一体型ステータの製造方法、これを利用したラジアルコアタイプダブルローター方式のｂｌｄｃモーター及びその製造方法

Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN104836395A (zh) * 2014-02-12 2015-08-12 日本电产高科电机株式会社 树脂外壳的成型方法以及马达
CN104836395B (zh) * 2014-02-12 2019-03-01 日本电产高科电机株式会社 树脂外壳的成型方法以及马达
CN104882977A (zh) * 2014-02-28 2015-09-02 日本电产高科电机株式会社 马达用定子及其制造方法
JP2015163014A (ja) * 2014-02-28 2015-09-07 日本電産テクノモータ株式会社 モータ用ステータ及びその製造方法
JP2015180150A (ja) * 2014-03-19 2015-10-08 マツダ株式会社 ステータコア、回転電機およびステータコアの製造方法
CN111322250A (zh) * 2018-12-13 2020-06-23 格兰富控股联合股份公司 泵机组

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CN104025432A (zh) 2014-09-03
JPWO2013065342A1 (ja) 2015-04-02

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