WO2014115775A1 - Electric motor bobbin structure and method for manufacturing same - Google Patents

Electric motor bobbin structure and method for manufacturing same Download PDF

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Publication number
WO2014115775A1
WO2014115775A1 PCT/JP2014/051277 JP2014051277W WO2014115775A1 WO 2014115775 A1 WO2014115775 A1 WO 2014115775A1 JP 2014051277 W JP2014051277 W JP 2014051277W WO 2014115775 A1 WO2014115775 A1 WO 2014115775A1
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WO
WIPO (PCT)
Prior art keywords
winding
bobbin
stator core
electric motor
mold resin
Prior art date
Application number
PCT/JP2014/051277
Other languages
French (fr)
Japanese (ja)
Inventor
谷本　勉
金子　雄太郎
山際　正憲
茂夫 桜井
Original Assignee
日産自動車株式会社
株式会社明電舎
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 日産自動車株式会社, 株式会社明電舎 filed Critical 日産自動車株式会社
Priority to JP2014558596A priority Critical patent/JP5900662B2/en
Publication of WO2014115775A1 publication Critical patent/WO2014115775A1/en

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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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
    • H02K9/223—Heat bridges
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • 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 bobbin structure of an electric motor that is mounted on a stator core and wound around an outer side, and a manufacturing method thereof.
  • the filler, the bobbin, and the winding are arranged in this order from the stator core side toward the outside. That is, the filler does not flow between the bobbin and the winding, and an air layer having a high thermal resistance exists around the winding. Therefore, the heat generated from the winding is transmitted to the filler via the air layer and the bobbin, and finally radiated from the stator core to the outside of the electric motor. That is, in this conventional electric motor bobbin structure, both the air layer having a high thermal resistance and the bobbin having a relatively high thermal resistance are factors of thermal resistance. For this reason, it is difficult to efficiently conduct heat from the winding to the stator core, and it has not been possible to improve heat transfer.
  • the present invention has been made paying attention to the above problems, and provides a bobbin structure for an electric motor capable of efficiently transferring heat generated from windings to a stator core and improving heat transfer performance, and a method for manufacturing the same. With the goal.
  • the bobbin structure for an electric motor includes a stator core, a bobbin, a winding, and a mold resin.
  • the bobbin is made of an insulator, and is provided on the outside of the stator core and wound with a winding, and a boring portion formed on the winding support and covered with the winding.
  • the mold resin is a resin having higher thermal conductivity than the bobbin, and integrally seals the stator core, the bobbin, and the winding. Furthermore, the mold resin is filled into at least a part of the lightening portion and brought into contact with the stator core and the winding.
  • the stator core, the bobbin, and the winding are integrally sealed with a mold resin having higher thermal conductivity than the bobbin, and at least a part of the lightening portion is filled.
  • a region in which the winding support part and the mold resin are interposed and a region in which only the mold resin is interposed are provided between the stator core and the winding.
  • FIG. 1 is a perspective view showing a bobbin of Example 1.
  • FIG. 3 is a flowchart showing a manufacturing procedure of the molded stator of Example 1. It is explanatory drawing which shows the injection direction at the time of injecting mold resin.
  • FIG. 3 is an explanatory diagram illustrating a heat conduction path in the bobbin structure according to the first embodiment.
  • FIG. 6 is a perspective view showing a bobbin in a bobbin structure according to a second embodiment.
  • FIG. 6 is a perspective view showing a bobbin in a bobbin structure according to a third embodiment.
  • FIG. 6 is a perspective view showing a bobbin in a bobbin structure according to a fourth embodiment. It is principal part sectional drawing which shows the mold stator to which the bobbin structure of Example 4 was applied.
  • FIG. 10 is a perspective view showing a bobbin in a bobbin structure according to a fifth embodiment.
  • Example 1 First, the configuration of the bobbin structure of the electric motor according to the first embodiment will be described by dividing it into “configuration of application example of bobbin structure”, “configuration of mold stator”, “configuration of bobbin”, and “procedure for manufacturing bobbin structure”.
  • FIG. 1 is a longitudinal sectional view showing a motor to which the bobbin structure of the electric motor according to the first embodiment is applied.
  • the application example of the bobbin structure of the electric motor of Example 1 is demonstrated.
  • a motor (electric motor) 1 shown in FIG. 1 includes a cylindrical molded stator 3 fixed inside a motor case 2 and a rotor 4 arranged concentrically with a radial gap inside the molded stator 3. ing.
  • the molded stator 3 is provided with a winding 33 as will be described later, and is fixed to the inner peripheral surface of the motor case 2.
  • a water jacket portion 2 a through which cooling water flows along the outer periphery of the mold stator 3 is formed inside the motor case 2.
  • the rotor 4 includes a rotor rotating shaft 4a, a laminated steel plate 4b, and a permanent magnet (not shown).
  • the rotor rotating shaft 4 a is rotatably supported at one end by a first rotor bearing 5 a provided inside the first side surface 2 b that is one side surface of the motor case 2, and is the second side surface of the motor case 2.
  • the tip protrudes from the opening 5c formed in the two side surfaces 2c.
  • a second rotor bearing 5b is fitted inside the opening 5c, and rotatably supports the rotor rotating shaft 4a.
  • the laminated steel plate 4b is fixed to the outer periphery of an end plate 4c fixed to the outer periphery of the rotor rotating shaft 4a, and a permanent magnet (not shown) is embedded in the vicinity of the outer peripheral surface of the laminated steel plate 4b.
  • FIG. 2A is an external perspective view showing a molded stator to which the bobbin structure of the first embodiment is applied
  • FIG. 2B is a perspective view showing the inside of the mold resin
  • FIG. 3 is a cross-sectional view of a main part showing a molded stator to which the bobbin structure of the first embodiment is applied.
  • the configuration of the molded stator of Example 1 will be described with reference to FIGS. 2A to 3.
  • the molded stator 3 includes a stator holder 31, a stator core 32, a winding wire 33, and a mold resin 34.
  • the stator holder 31 is a metal cylinder having a high roundness, and both ends are open.
  • the stator core 32 is formed by connecting a plurality of core segments 32 a shown in FIG. 3 in the circumferential direction of the molded stator 3 to form an annular shape and fixing the same inside the stator holder 31.
  • Each core segment 32 a is configured by laminating a number of T-shaped stator steel plates formed by press-molding electromagnetic steel plates in the axial direction of the mold stator 3.
  • the core segment 32a is formed at the arcuate back yoke portion 35a along the inner peripheral surface of the stator holder 31, the tooth portion 35b protruding from the back yoke portion 35a to the inside of the mold stator 3, and the tip of the tooth portion 35b. And a flange 35c.
  • the winding wire 33 is an electromagnetic wire wound around the tooth portion 35b of each core segment 32a, and is wound around the tooth portion 35b over a plurality of layers as shown in FIG. Further, a bobbin 36 (see FIG. 3) is provided outside the tooth portion 35b, and the winding 33 is wound around the tooth portion 35b via the bobbin 36.
  • the mold resin 34 is a resin having higher thermal conductivity than at least the bobbin 36, and integrally seals the stator core 32, the winding wire 33, and the bobbin 36.
  • the mold resin 34 is injected between the stator core 32 and the winding wire 33, filled between the winding wire 33 and the winding support portion 36a of the bobbin 36, and a lightening portion formed on the winding support portion 36a. 36b is filled.
  • the mold resin 34 filled in the lightening portion 36 b overflows from the lightening portion 36 b and contacts both the stator core 32 and the winding wire 33.
  • FIG. 4 is a perspective view illustrating the bobbin according to the first embodiment.
  • FIG. 5 is an exploded perspective view illustrating the core segment and the bobbin according to the first embodiment.
  • the configuration of the bobbin according to the first embodiment will be described with reference to FIGS. 4 and 5.
  • the bobbin 36 is formed of an insulating material such as resin, and as shown in FIG. 4, has a winding support part 36a, a lightening part 36b, a first flange part 36c, and a second flange part 36d. is doing. Further, the bobbin 36 has a structure that can be divided into two, and is mounted by sandwiching the teeth portion 35b of the stator core 32 along the axial direction of the molded stator 3 as shown in FIG.
  • the winding support part 36a covers the outside of the tooth part 35b and supports the winding 33 wound around the tooth part 35b.
  • the teeth part 35b has a quadrangular prism shape extending toward the inside of the mold stator 3, and the winding support part 36a is provided outside the four corners 35b 'of the tooth part 35b. That is, the winding support portions 36a in the first embodiment are provided at four locations that respectively cover the corner portions 35b ′ of the teeth portions 35b.
  • the said lightening part 36b is a notch part formed in the winding support part 36a, and is covered with the winding 33 wound around the teeth part 35b.
  • gap portions provided between the four winding support portions 36a correspond to the thinned portions 36b and are formed corresponding to the coil end facing surface 35d and the circumferential side surface 35e of the tooth portion 35b.
  • the “coil end facing surface” is a surface facing the coil end of the winding 33 wound around the stator core 32 and is an end surface in the axial direction of the molded stator 3.
  • the “circumferential side surface” is an end surface in the circumferential direction of the mold stator 3.
  • the first and second flange portions 36c and 36d are respectively provided at the end portions of the winding support portion 36a.
  • the first flange portion 36c is interposed between the back yoke portion 35a of the stator core 32 and the winding wire 33, and
  • the two flange portions 36 d are interposed between the flange portion 35 c of the stator core 32 and the winding wire 33.
  • the first flange portion 36c on the back yoke portion 35a side is formed over the entire circumference of the tooth portion 35b.
  • the second flange portion 36d on the side of the flange portion 35c is formed with a communication portion 36e that cuts out the second flange portion 36d and communicates with the lightening portion 36b. That is, in this 2nd flange part 36d, the part corresponding to the thinning part 36b is notched, and only the part which continues from the winding support part 36a is formed.
  • FIG. 6 is a flowchart illustrating a manufacturing procedure of the molded stator according to the first embodiment. Hereinafter, based on FIG. 6, the manufacturing procedure of the mold stator of Example 1 is demonstrated.
  • step S1 the bobbin 36 is mounted on the teeth 35b of the core segment 32a formed by previously laminating a number of electromagnetic steel plates.
  • step S2 after the bobbin 36 is mounted in step S1, the winding wire 33 is wound into a shape that can be engaged with the tooth portion 35b, and then the winding wire 33 is attached to the tooth portion 35b. At this time, the winding wire 33 is attached to the outside of the bobbin 36, is supported by the winding wire support portion 36a, and covers the lightening portion 36b.
  • step S3 following the attachment of the winding wire 33 in step S2, a plurality of core segments 32a to which the winding wire 33 is attached are arranged in an annular shape, and the stator core 32 is assembled.
  • step S4 following the assembly of the stator core 32 in step S3, the stator holder 31 is heated and expanded, and the assembled stator core 32 is fitted inside the expanded stator holder 31, and then cooled. That is, the stator core 32 is fixed to the stator holder 31 by so-called shrink fitting.
  • step S5 following the fixing of the stator core 32 in step S4, a mold (not shown) is attached to the stator holder 31 and the stator core 32.
  • This mold is, for example, a resin mold that is divided into two in the axial direction of the mold stator 3, and is attached by sandwiching the stator holder 31 and the stator core 32 and clamping the mold.
  • step S6 following the mounting of the mold in step S5, the mold resin 34 is injected (filled) into the mold.
  • the molding resin 34 is injected between the tooth portion 35 b of the stator core 32 and the winding wire 33. That is, the mold resin 34 is injected toward the inside of the winding wire 33.
  • the second flange portion 36d on the flange 35c side of the stator core 32 is passed through the second flange portion 36d, A communication portion 36e that communicates with the lightening portion 36b is formed. Therefore, here, the mold resin 34 is injected toward the communication portion 36e.
  • the mold resin 34 that has flowed into the communication portion 36e is first filled into the lightening portion 36b. After that, it overflows from the lightening portion 36b, flows between the winding support portion 36a and the teeth portion 35b, or between the winding support portion 36a and the winding wire 33, and is filled between them. And the gaps between the windings 33 are filled.
  • step S7 following the injection of the mold resin 34 in step S6, the mold resin 34 is cooled and cured, and then the mold is removed and the assembly of the mold stator 3 is completed.
  • FIG. 8A is an explanatory diagram showing a heat conduction path in the bobbin structure of the first comparative example
  • FIG. 8B is an explanatory diagram showing a heat conduction path in the bobbin structure of the second comparative example
  • FIG. 8C is a diagram of the third comparative example. It is explanatory drawing which shows the heat conduction path
  • FIGS. 8A to 8C the bobbin structure of the comparative example and its problem will be described with reference to FIGS. 8A to 8C.
  • the bobbin 61 is provided outside the stator core 60, and the winding 62 is wound around the outside. And after winding the winding 62, the varnish 63 is dripped and the winding 62 is coated with the varnish 63.
  • the heat generated from the winding 62 is transmitted in the order of the winding 62 ⁇ the air layer 64 ⁇ the bobbin 61 ⁇ the air layer 64 ⁇ the stator core 60 as indicated by an arrow in FIG. 8A. Then, heat is radiated from the stator core 60. That is, the air layer 64 and the bobbin 61 having high thermal resistance are interposed between the winding 62 and the stator core 60. For this reason, there is a problem that the heat of the winding 62 is not easily transmitted to the stator core 60 and the heat conduction efficiency is poor.
  • the mold resin 65 having higher thermal conductivity than the bobbin 61 is filled between the bobbin 61 and the winding 62.
  • a mold resin 65 having higher thermal conductivity than the bobbin 61 is filled between the bobbin 61 and the stator core 60.
  • the air layer is filled with the mold resin 65, and heat is transferred through the mold resin 65 as shown by arrows in FIGS. 8B and 8C.
  • the heat conduction performance can be improved as compared with the first comparative example shown in FIG. 8A.
  • the air layer 64 still remains around the bobbin 61 and heat conduction is always performed through the bobbin 61 having lower heat conductivity than the mold resin 65. For this reason, the air layer 64 and the bobbin 61 become thermal resistance factors, and it is difficult to improve the heat conduction efficiency.
  • FIG. 9 is an explanatory diagram illustrating a heat conduction path in the bobbin structure according to the first embodiment.
  • the heat conductive action in the bobbin structure of Example 1 will be described.
  • the bobbin 36 provided on the tooth portion 35b of the stator core 32 includes a winding support portion 36a and a lightening portion 36b. Then, the winding wire 33 is wound around the outside of the tooth portion 35 b via the bobbin 36. At this time, the winding wire 33 is supported by the winding wire support portion 36a and covers the lightening portion 36b. Further, a mold resin 34 having higher thermal conductivity than the bobbin 36 is filled between the stator core 32 and the winding wire 33.
  • the mold resin 34 filled in the hollow portion 36 b of the bobbin 36 is applied to both the stator core 32 and the winding wire 33. In close contact. Further, the mold resin 34 that flows along the outside of the winding support 36 a cannot enter between the bobbin 36 and the stator core 32, and an air layer 64 is generated between the bobbin 36 and the stator core 32. That is, between the stator core 32 and the winding 33, the region X in which the winding support portion 36 a and the mold resin 34 are interposed, and the lightening portion 36 b are filled and contact both the winding 33 and the stator core 32. A region Y in which only the mold resin 34 is interposed is provided.
  • Example 1 As a heat conduction path at the time of radiating the heat generated from the winding 33, a first heat conduction path indicated by an arrow ⁇ in FIG. There are two heat conduction paths that pass through region Y, the second heat transfer path indicated by arrow ⁇ in FIG.
  • the heat generated from the winding 33 is first transmitted to the mold resin 34 filled around the winding 33. Then, it is transmitted to the winding support portion 36 a of the bobbin 36 and is transmitted to the stator core 32 through the air layer 64. That is, in the first heat conduction path (arrow ⁇ ), heat conduction is performed by the same phenomenon as in the second comparative example.
  • the heat generated from the winding 33 is first transmitted to the mold resin 34 filled around the winding 33.
  • the second heat conduction path (arrow ⁇ ) passes through the region Y in which the thinned portion 36b is filled and the mold resin 34 that contacts both the winding wire 33 and the stator core 32 is interposed. Therefore, in the second heat conduction path (arrow ⁇ ), the heat transferred to the mold resin 34 is directly transferred from the mold resin 34 to the stator core 32 and is radiated from the stator core 32.
  • the winding support portion 36a becomes a thermal resistance factor, but this winding support portion 36a ensures insulation between the winding 33 and the stator core 32. Can be secured. That is, when the mold resin 34 is injected, the winding 33 is likely to be displaced due to the impact of the resin inflow, but the winding support portion 36a prevents the winding 33 from being displaced and ensures insulation. be able to. Further, the insulating property of the lightening portion 36b can be ensured by the mold resin 34 flowing into the lightening portion 36b.
  • the teeth portion 35b of the stator core 32 has a quadrangular prism shape, and the winding support portion 36a is provided outside the four corner portions 35b ′ of the teeth portion 35b. Therefore, the lightening portion 36b is formed corresponding to each of the coil end facing surface 35d and the circumferential side surface 35e of the tooth portion 35b.
  • the area where the thinned portion 36b faces the teeth portion 35b can be ensured to be relatively larger than the area where the winding support portion 36a faces the teeth portion 35b, and the second heat having high thermal conductivity. It is possible to dissipate heat mainly using heat conduction through the transmission path (arrow ⁇ ). Therefore, heat conduction can be performed more efficiently and heat dissipation performance can be improved.
  • the other flange portion 36d on the flange portion 35c side is formed with a communication portion 36e that penetrates the flange portion 36d and communicates with the lightening portion 36b. Therefore, when the mold resin 34 is injected, the mold resin 34 flows into the lightening portion 36b through the communication portion 36e. As a result, the mold resin 34 can be stably filled into the thinned portion 36b, and the mold resin 34 can be injected without entraining air.
  • the mold resin 34 can be reliably poured even in a portion where the teeth portion 35b and the winding wire 33 communicate with each other like the thinned portion 36b. Therefore, it is possible to prevent the winding wire 33 from coming into contact with the tooth portion 35 b by the mold resin 34, and to ensure insulation between the tooth portion 35 b and the winding wire 33.
  • a stator core 32 around which the winding wire 33 is wound An insulator having a winding support portion 36 a that covers the outside of the stator core 32 and supports the winding wire 33, and a lightening portion 36 b that is formed on the winding support portion 36 a and is covered with the winding wire 33.
  • a bobbin 36 comprising: The stator core 32, the bobbin 36, and the winding wire 33 are integrally sealed, and a mold resin 34 having higher thermal conductivity than the bobbin 36 is provided. The mold resin 34 is filled into at least a part of the lightening portion 36 b and is brought into contact with the stator core 32 and the winding wire 33. For this reason, the heat generated from the winding 33 can be efficiently transmitted to the stator core 32, and the heat transfer performance can be improved.
  • the stator core 32 has a prismatic teeth portion 35b
  • the said winding support part 36a was set as the structure provided in the outer side of corner
  • the bobbin 36 includes a flange portion 36d formed on at least one end of the winding support portion 36a; A configuration is adopted in which a communicating portion 36e that penetrates through the flange portion 36d and communicates with the lightening portion 36b is provided. For this reason, the mold resin 34 quickly flows into the lightening portion 36b through the communication portion 36e, and the thinning portion 36b can be stably filled with the mold resin 34.
  • a stator core 32 around which the winding wire 33 is wound;
  • An insulator having a winding support portion 36 a that covers the outside of the stator core 32 and supports the winding wire 33, and a lightening portion 36 b that is formed on the winding support portion 36 a and is covered with the winding wire 33.
  • a bobbin 36 comprising:
  • the bobbin structure of the electric motor (motor) 1 includes the stator core 32, the bobbin 36, and the winding wire 33 integrally sealed and a mold resin 34 having higher thermal conductivity than the bobbin 36.
  • the mold resin 34 is injected toward the inner side of the winding wire 33, and at least a part of the lightening portion 36b is The mold resin 34 is filled, and the mold resin 34 filled in the thinned portion 36 b is brought into contact with the stator core 32 and the winding wire 33. For this reason, it is possible to prevent the winding wire 33 from coming into contact with the tooth portion 35b by the mold resin 34 and to ensure insulation between the winding wire 33 and the tooth portion 35b.
  • the bobbin structure of the second embodiment is an example in which the winding support portion is provided along the axial direction of the stator core.
  • FIG. 10 is a perspective view showing the bobbin of the second embodiment.
  • the bobbin structure of the second embodiment will be described with reference to FIG.
  • the bobbin 70 of the second embodiment includes a winding support portion 71, a lightening portion 72, a first flange portion 73a, and a second flange portion 73b.
  • the said winding support part 71 is provided in the outer side of the circumferential direction side surface 35e (refer FIG. 3) of the teeth part 35b of a quadratic prism shape. That is, the winding support 71 in the second embodiment is provided along the axial direction of the stator core 32.
  • the said thinning part 72 is formed corresponding to the coil end opposing surface 35d (refer FIG. 3) of the teeth part 35b. That is, the thinned portion 72 is formed by cutting out a portion facing the coil end facing surface 35d in the winding support portion that covers the entire circumferential surface of the tooth portion 35b.
  • the pair of flange portions 73a and 73b are respectively formed over the entire circumference of the tooth portion 35b, and extend along the back yoke portion 35a and the flange portion 35c (see FIG. 5).
  • the winding support portion 71 of the bobbin 70 is provided along the axial direction of the stator core 32 (see FIG. 5), and the lightening portion 72 is formed on the coil end facing surface 35d of the teeth portion 35b. It is formed in the corresponding position.
  • the “region where the winding support portion 71 and the mold resin are interposed” generated between the stator core 32 and the winding (not shown), which has a relatively high thermal resistance and low thermal conductivity, is the molded stator 3. (See FIG. 2).
  • the “region where only the mold resin is interposed” generated between the stator core 32 and the winding (not shown) having a relatively low thermal resistance and high thermal conductivity is the coil end of the winding (not shown). It will be provided opposite to.
  • the short-axis molded stator 3 having a relatively short dimension in the axial direction it is possible to improve the heat dissipation performance from the coil end that is difficult to dissipate heat.
  • contact between the circumferential side surface 35e of the stator core 32 and a winding (not shown) can be reliably prevented.
  • the winding support portion 71 is configured to be provided along the axial direction of the stator core 32. For this reason, even if it is a mold stator with a comparatively short axial dimension, while improving heat dissipation performance, the insulation of the stator core 32 in the axial direction can be ensured.
  • the bobbin structure of the third embodiment is an example in which the winding support portion is provided at a position corresponding to the coil end portion of the winding.
  • FIG. 11 is a perspective view showing the bobbin of the third embodiment.
  • the bobbin structure of Example 3 will be described with reference to FIG.
  • the bobbin 74 includes a winding support portion 75, a lightening portion 76, and a pair of flange portions 77a and 77b. Further, the bobbin 74 has a structure that can be divided into two via a dividing line 78, and the teeth portion 35b (see FIG. 3) of the stator core 32 is arranged in the circumferential direction of the molded stator 3 (see FIG. 2). The stator core 32 is attached by being sandwiched along.
  • the said winding support part 75 is provided in the outer side of the coil end opposing surface 35d (refer FIG. 3) of the teeth part 35b of a quadratic prism shape. That is, the winding support 71 in the second embodiment is provided at a position corresponding to the coil end of the winding 33 (see FIG. 3).
  • the said thinning part 76 is formed corresponding to the circumferential side surface 35e (refer FIG. 3) of the teeth part 35b.
  • the thinned portion 76 is formed by cutting out a portion facing the circumferential side surface 35e in the winding support portion that covers the entire circumference of the tooth portion 35b.
  • the pair of flange portions 77a and 77b are respectively formed over the entire circumference of the tooth portion 35b, and extend along the back yoke portion 35a and the flange portion 35c (see FIG. 5).
  • the winding support portion 75 of the bobbin 74 is provided at a position corresponding to the coil end of the winding wire 33 (see FIG. 3), and the lightening portion 76 is a circumferential side surface of the tooth portion 35b. It is formed at a position facing 35e.
  • the “region where the winding support 75 and the mold resin are interposed” generated between the stator core 32 and the winding 33, which has a relatively high thermal resistance and low thermal conductivity, is the coil end of the winding 33. It will be provided opposite to.
  • the “region where only the molding resin is interposed” generated between the stator core 32 and the winding (not shown), which has a relatively low thermal resistance and high thermal conductivity, is the mold stator 3 (see FIG. 2). It will be along the axial direction. Thereby, in the long-axis mold stator 3 having a relatively long dimension in the axial direction, it is possible to improve the heat dissipation performance from the circumferential side surface 35e that is difficult to dissipate heat.
  • the circumferential side surface 35e of the stator core 32 and the winding are high. Insulation can also be secured.
  • the winding support portion 71 is provided at a position corresponding to the coil end of the winding 33. For this reason, even if it is a mold stator with a comparatively long axial dimension, heat dissipation performance can be improved.
  • Example 4 The bobbin structure of Example 4 is an example having a partition portion that partitions the outside of the winding.
  • FIG. 12 is a perspective view showing the bobbin of the fourth embodiment.
  • FIG. 13 is a cross-sectional view of a main part showing a molded stator to which the bobbin structure of the fourth embodiment is applied.
  • the bobbin structure of the fourth embodiment will be described with reference to FIGS. 12 and 13.
  • the bobbin 80 of the fourth embodiment includes a winding support portion 81, a lightening portion 82, a pair of flange portions 83 a and 83 b, and a partition portion 84.
  • the winding support part 81, the lightening part 82, and the pair of flange parts 83a and 83b have the same configuration as in the first embodiment, the description thereof is omitted.
  • the partition portion 84 is a flat plate extending toward the inside of the stator core 32 from a circumferential end portion 83 a ′ of one flange portion 83 a interposed between the back yoke portion 35 a of the stator core 32 and the winding wire 33. .
  • the partition part 84 defines the outside of the winding 33 wound around the tooth part 35 b of the stator core 32.
  • Example 4 the adjacent windings 33 are partitioned by the partition portion 84 as shown in FIG.
  • the bobbin 80 has a partition portion 84 that partitions the outside of the winding wire 33. For this reason, contact between adjacent windings 33 can be prevented and insulation can be secured.
  • the bobbin structure of the fifth embodiment is an example in which a communicating portion is provided in the flange portion on the back yoke portion side of the stator core.
  • FIG. 14 is a perspective view showing the bobbin of the fifth embodiment.
  • the bobbin structure of the fifth embodiment will be described with reference to FIG.
  • the bobbin 85 of the fifth embodiment includes a winding support portion 86, a lightening portion 87, a pair of flange portions 88 a and 88 b, and a communication portion 89.
  • the winding support portion 86, the lightening portion 87, and the pair of flange portions 88a and 88b have the same configuration as that of the second embodiment, and thus description thereof is omitted.
  • the communication portion 89 is formed by cutting out a part of one flange portion 88a extending along the back yoke portion 35a (see FIG. 5) of the stator core 32, and penetrates the one flange portion 88a. It communicates with the meat removal portion 87.
  • the resin filling can be quickly performed into the lightening portion 87 via the communication portion 89.
  • the communication portion 36e is formed only on the other flange portion 36d along the flange portion 35c of the stator core 32.
  • the fifth embodiment only one flange portion 88a along the back yoke portion 35a of the stator core 32 is formed.
  • the example which formed the communication part 89 was shown.
  • the present invention is not limited to this, and any of the pair of flange portions may be formed with a communication portion communicating with the lightening portion.

Abstract

Provided is an electric motor bobbin structure that is capable of efficiently transmitting heat generated from a winding to a stator core and improving heat-transmission performance. This electric motor bobbin structure is provided with: a stator core (32); a bobbin (36) covering the outside of the stator core (32); a winding (33) wound around the outside of the stator core (32) with a bobbin (36) interposed therebetween; and a mold resin (34) for integrally sealing the stator core (32), the bobbin (36), and the winding (33), and having higher heat conductivity than the bobbin (36). The bobbin (36) also has a winding support part (36a) for supporting the winding (33), and a thickness-removing part (36b) formed on the winding support part (36a) and covered by the winding (33). The mold resin (34) is configured to fill at least part of the thickness-removing part (36b), and to contact the stator core (32) and the winding (33).

Description

電動機のボビン構造及びその製造方法Bobbin structure of electric motor and manufacturing method thereof
　本発明は、ステータコアに装着され、外側に巻き線が巻回される電動機のボビン構造及びその製造方法に関するものである。 The present invention relates to a bobbin structure of an electric motor that is mounted on a stator core and wound around an outer side, and a manufacturing method thereof.
　従来、ステータコアの外側に絶縁性を有するボビンを装着し、このボビンの外側に巻き線を巻回すると共に、ステータコアとボビンとの間に高熱伝導性の充填材を充填した電動機のボビン構造が知られている（例えば、特許文献１参照）。 Conventionally, a bobbin structure of an electric motor in which an insulating bobbin is attached to the outside of the stator core, a winding is wound around the outside of the bobbin, and a high thermal conductive filler is filled between the stator core and the bobbin is known. (For example, refer to Patent Document 1).
特開2010-119191号公報JP 2010-119191 A
　ところで、従来の電動機のボビン構造では、ステータコア側から外方に向かって充填材、ボビン、巻き線の順に並んでいる。つまり、充填材はボビンと巻き線との間に流れ込んでおらず、巻き線の周囲には熱抵抗の高い空気層が存在している。そのため、巻き線から発生する熱は、この空気層とボビンを介して充填材に伝達され、最終的にステータコアから電動機の外へと放熱されることになる。
　すなわち、この従来の電動機のボビン構造では、熱抵抗の高い空気層と、比較的熱抵抗が高いボビンとが共に熱抵抗要因になっていた。そのため、巻き線からステータコアへの熱伝導を効率よく行うことが難しく、伝熱性の向上を図ることができなかった。 By the way, in the bobbin structure of the conventional electric motor, the filler, the bobbin, and the winding are arranged in this order from the stator core side toward the outside. That is, the filler does not flow between the bobbin and the winding, and an air layer having a high thermal resistance exists around the winding. Therefore, the heat generated from the winding is transmitted to the filler via the air layer and the bobbin, and finally radiated from the stator core to the outside of the electric motor.
That is, in this conventional electric motor bobbin structure, both the air layer having a high thermal resistance and the bobbin having a relatively high thermal resistance are factors of thermal resistance. For this reason, it is difficult to efficiently conduct heat from the winding to the stator core, and it has not been possible to improve heat transfer.
　本発明は、上記問題に着目してなされたもので、巻き線から発生した熱をステータコアへ効率よく伝達し、伝熱性能を向上することができる電動機のボビン構造及びその製造方法を提供することを目的とする。 The present invention has been made paying attention to the above problems, and provides a bobbin structure for an electric motor capable of efficiently transferring heat generated from windings to a stator core and improving heat transfer performance, and a method for manufacturing the same. With the goal.
　上記目的を達成するため、本発明の電動機のボビン構造では、ステータコアと、ボビンと、巻き線と、モールド樹脂とを備えている。
　前記ボビンは、絶縁体からなり、前記ステータコアの外側に設けられると共に巻き線が巻回される巻き線支持部と、前記巻き線支持部に形成されると共に前記巻き線に覆われる肉抜き部と、を有する。
　前記モールド樹脂は、前記ボビンよりも熱伝導性の高い樹脂であり、前記ステータコアと、前記ボビンと、前記巻き線を一体的に封止する。
　さらに、前記モールド樹脂を、前記肉抜き部の少なくとも一部に充填し、前記ステータコアと前記巻き線に接触させる。 In order to achieve the above object, the bobbin structure for an electric motor according to the present invention includes a stator core, a bobbin, a winding, and a mold resin.
The bobbin is made of an insulator, and is provided on the outside of the stator core and wound with a winding, and a boring portion formed on the winding support and covered with the winding. Have.
The mold resin is a resin having higher thermal conductivity than the bobbin, and integrally seals the stator core, the bobbin, and the winding.
Furthermore, the mold resin is filled into at least a part of the lightening portion and brought into contact with the stator core and the winding.
　本発明の電動機のボビン構造にあっては、ボビンよりも熱伝導性の高いモールド樹脂により、ステータコアとボビンと巻き線を一体的に封止すると共に、肉抜き部の少なくとも一部に充填することでステータコアと巻き線との間に、巻き線支持部とモールド樹脂を介在させた領域と、モールド樹脂のみを介在させた領域と、を設けている。
　これにより、巻き線の周囲はモールド樹脂によって覆われ、巻き線周囲に空気層が存在しない。このため、巻き線から発生した熱はモールド樹脂に伝達され、効率よく熱伝導を行うことができる。
　また、ステータコアと巻き線との間において、モールド樹脂のみを介在させた領域では、巻き線から発生した熱は熱伝導性の高いモールド樹脂のみを介してステータコアに伝えられる。つまり、熱抵抗の比較的高いボビンや空気層を介在させないことで、熱伝導性を向上し、効率よく熱伝導を行うことができる。
　この結果、巻き線から発生した熱をステータコアへ効率よく伝達し、伝熱性能を向上することができる。 In the bobbin structure of the electric motor of the present invention, the stator core, the bobbin, and the winding are integrally sealed with a mold resin having higher thermal conductivity than the bobbin, and at least a part of the lightening portion is filled. Thus, between the stator core and the winding, a region in which the winding support part and the mold resin are interposed and a region in which only the mold resin is interposed are provided.
Thereby, the circumference | surroundings of winding are covered with mold resin, and an air layer does not exist around winding. For this reason, the heat generated from the winding is transmitted to the mold resin, and heat conduction can be performed efficiently.
Further, in a region where only the mold resin is interposed between the stator core and the winding, heat generated from the winding is transmitted to the stator core only through the mold resin having high thermal conductivity. That is, by not interposing a bobbin or air layer having a relatively high thermal resistance, thermal conductivity can be improved and heat conduction can be performed efficiently.
As a result, the heat generated from the winding can be efficiently transferred to the stator core, and the heat transfer performance can be improved.
実施例１のボビン構造が適用されたモータを示す縦断面図である。It is a longitudinal cross-sectional view which shows the motor to which the bobbin structure of Example 1 was applied. 実施例１のボビン構造が適用されたモールドステータを示す外観斜視図である。It is an external appearance perspective view which shows the mold stator to which the bobbin structure of Example 1 was applied. 実施例１のボビン構造が適用されたモールドステータのモールド樹脂の内部を示す斜視図である。It is a perspective view which shows the inside of the mold resin of the mold stator to which the bobbin structure of Example 1 was applied. 実施例１のボビン構造が適用されたモールドステータを示す要部断面図である。It is principal part sectional drawing which shows the mold stator to which the bobbin structure of Example 1 was applied. 実施例１のボビンを示す斜視図である。1 is a perspective view showing a bobbin of Example 1. FIG. 実施例１のコアセグメントとボビンを示す分解斜視図である。It is a disassembled perspective view which shows the core segment and bobbin of Example 1. FIG. 実施例１のモールドステータの製造手順を示すフローチャートである。3 is a flowchart showing a manufacturing procedure of the molded stator of Example 1. モールド樹脂を射出する際の射出方向を示す説明図である。It is explanatory drawing which shows the injection direction at the time of injecting mold resin. 第１比較例のボビン構造における熱伝導経路を示す説明図である。It is explanatory drawing which shows the heat conduction path | route in the bobbin structure of a 1st comparative example. 第２比較例のボビン構造における熱伝導経路を示す説明図である。It is explanatory drawing which shows the heat conduction path | route in the bobbin structure of a 2nd comparative example. 第３比較例のボビン構造における熱伝導経路を示す説明図である。It is explanatory drawing which shows the heat conduction path | route in the bobbin structure of a 3rd comparative example. 実施例１のボビン構造における熱伝導経路を示す説明図である。FIG. 3 is an explanatory diagram illustrating a heat conduction path in the bobbin structure according to the first embodiment. 実施例２のボビン構造におけるボビンを示す斜視図である。FIG. 6 is a perspective view showing a bobbin in a bobbin structure according to a second embodiment. 実施例３のボビン構造におけるボビンを示す斜視図である。FIG. 6 is a perspective view showing a bobbin in a bobbin structure according to a third embodiment. 実施例４のボビン構造におけるボビンを示す斜視図である。FIG. 6 is a perspective view showing a bobbin in a bobbin structure according to a fourth embodiment. 実施例４のボビン構造が適用されたモールドステータを示す要部断面図である。It is principal part sectional drawing which shows the mold stator to which the bobbin structure of Example 4 was applied. 実施例５のボビン構造におけるボビンを示す斜視図である。FIG. 10 is a perspective view showing a bobbin in a bobbin structure according to a fifth embodiment.
　以下、本発明の電動機のボビン構造及びその製造方法を実施するための形態を、図面に示す実施例１～実施例５に基づいて説明する。 Hereinafter, the bobbin structure for an electric motor and the method for manufacturing the same according to the present invention will be described based on Examples 1 to 5 shown in the drawings.
　（実施例１）
　まず、実施例１の電動機のボビン構造における構成を「ボビン構造の適用例の構成」、「モールドステータの構成」、「ボビンの構成」、「ボビン構造の製造手順」に分けて説明する。 (Example 1)
First, the configuration of the bobbin structure of the electric motor according to the first embodiment will be described by dividing it into “configuration of application example of bobbin structure”, “configuration of mold stator”, “configuration of bobbin”, and “procedure for manufacturing bobbin structure”.
　[ボビン構造の適用例の構成] 
　図１は、実施例１の電動機のボビン構造が適用されたモータを示す縦断面図である。以下、図１に基づいて、実施例１の電動機のボビン構造の適用例について説明する。 [Configuration of application example of bobbin structure]
FIG. 1 is a longitudinal sectional view showing a motor to which the bobbin structure of the electric motor according to the first embodiment is applied. Hereinafter, based on FIG. 1, the application example of the bobbin structure of the electric motor of Example 1 is demonstrated.
　図１に示すモータ（電動機）１は、モータケース２の内側に固定した円筒状のモールドステータ３と、このモールドステータ３の内側にラジアルギャップを持たせて同心に配置したロータ４と、を備えている。 A motor (electric motor) 1 shown in FIG. 1 includes a cylindrical molded stator 3 fixed inside a motor case 2 and a rotor 4 arranged concentrically with a radial gap inside the molded stator 3. ing.
　前記モールドステータ３は、後述するように巻き線３３を備え、モータケース２の内周面に固定されている。なお、モータケース２の内部には、モールドステータ３の外周に沿って冷却水が流通するウォータジャケット部２ａが形成されている。 The molded stator 3 is provided with a winding 33 as will be described later, and is fixed to the inner peripheral surface of the motor case 2. A water jacket portion 2 a through which cooling water flows along the outer periphery of the mold stator 3 is formed inside the motor case 2.
　前記ロータ４は、ロータ回転軸４ａと、積層鋼板４ｂと、図示しない永久磁石と、を有している。
前記ロータ回転軸４ａは、モータケース２の一方の側面である第１側面２ｂの内側に設けられた第１ロータ軸受５ａに一端が回転自在に支持され、モータケース２の他方の側面である第２側面２ｃに形成された開口部５ｃから先端が突出している。なお、この開口部５ｃの内側には第２ロータ軸受５ｂが嵌着され、ロータ回転軸４ａを回転自在に支持する。
前記積層鋼板４ｂは、ロータ回転軸４ａの外周に固定されたエンドプレート４ｃの外周に固設され、この積層鋼板４ｂの外周面近傍に図示しない永久磁石が埋設されている。 The rotor 4 includes a rotor rotating shaft 4a, a laminated steel plate 4b, and a permanent magnet (not shown).
The rotor rotating shaft 4 a is rotatably supported at one end by a first rotor bearing 5 a provided inside the first side surface 2 b that is one side surface of the motor case 2, and is the second side surface of the motor case 2. The tip protrudes from the opening 5c formed in the two side surfaces 2c. A second rotor bearing 5b is fitted inside the opening 5c, and rotatably supports the rotor rotating shaft 4a.
The laminated steel plate 4b is fixed to the outer periphery of an end plate 4c fixed to the outer periphery of the rotor rotating shaft 4a, and a permanent magnet (not shown) is embedded in the vicinity of the outer peripheral surface of the laminated steel plate 4b.
　［モールドステータの構成］
　図２Ａは、実施例１のボビン構造が適用されたモールドステータを示す外観斜視図であり、図２Ｂは、モールド樹脂の内部を示す斜視図である。また、図３は、実施例１のボビン構造が適用されたモールドステータを示す要部断面図である。以下、図２Ａ～図３に基づいて、実施例１のモールドステータの構成について説明する。 [Configuration of mold stator]
FIG. 2A is an external perspective view showing a molded stator to which the bobbin structure of the first embodiment is applied, and FIG. 2B is a perspective view showing the inside of the mold resin. FIG. 3 is a cross-sectional view of a main part showing a molded stator to which the bobbin structure of the first embodiment is applied. Hereinafter, the configuration of the molded stator of Example 1 will be described with reference to FIGS. 2A to 3.
　前記モールドステータ３は、図２Ａ及び図２Ｂに示すように、ステータホルダ３１と、ステータコア３２と、巻き線３３と、モールド樹脂３４と、を備えている。 2A and 2B, the molded stator 3 includes a stator holder 31, a stator core 32, a winding wire 33, and a mold resin 34.
　前記ステータホルダ３１は、高い真円度を持つ金属円筒体であり、両端が開放している。 The stator holder 31 is a metal cylinder having a high roundness, and both ends are open.
　前記ステータコア３２は、図３に示すコアセグメント３２ａをモールドステータ３の周方向に複数連結して円環状に形成し、ステータホルダ３１の内側に固定することで構成されている。
各コアセグメント３２ａは、電磁鋼板をプレス成型して形成されたＴ字状のステータ鋼板を、モールドステータ３の軸線方向に多数積層して構成されている。このコアセグメント３２ａは、ステータホルダ３１の内周面に沿う円弧状のバックヨーク部３５ａと、バックヨーク部３５ａからモールドステータ３の内側に突出したティース部３５ｂと、ティース部３５ｂの先端に形成された鍔部３５ｃと、を有している。 The stator core 32 is formed by connecting a plurality of core segments 32 a shown in FIG. 3 in the circumferential direction of the molded stator 3 to form an annular shape and fixing the same inside the stator holder 31.
Each core segment 32 a is configured by laminating a number of T-shaped stator steel plates formed by press-molding electromagnetic steel plates in the axial direction of the mold stator 3. The core segment 32a is formed at the arcuate back yoke portion 35a along the inner peripheral surface of the stator holder 31, the tooth portion 35b protruding from the back yoke portion 35a to the inside of the mold stator 3, and the tip of the tooth portion 35b. And a flange 35c.
　前記巻き線３３は、各コアセグメント３２ａのティース部３５ｂに巻回される電磁線であり、図３に示すように、ティース部３５ｂに対し複数層に渡って巻きつけられる。また、ティース部３５ｂの外側にはボビン３６（図３参照）が設けられ、巻き線３３は、このボビン３６を介してティース部３５ｂに巻回されることとなる。 The winding wire 33 is an electromagnetic wire wound around the tooth portion 35b of each core segment 32a, and is wound around the tooth portion 35b over a plurality of layers as shown in FIG. Further, a bobbin 36 (see FIG. 3) is provided outside the tooth portion 35b, and the winding 33 is wound around the tooth portion 35b via the bobbin 36.
　前記モールド樹脂３４は、少なくともボビン３６よりも熱伝導性の高い樹脂であり、ステータコア３２と巻き線３３とボビン３６を一体的に封止する。このモールド樹脂３４は、ステータコア３２と巻き線３３の間に射出され、巻き線３３とボビン３６の巻き線支持部３６ａの間に充填されると共に、巻き線支持部３６ａに形成された肉抜き部３６ｂに充填される。この肉抜き部３６ｂに充填されたモールド樹脂３４は、肉抜き部３６ｂから溢れ出し、ステータコア３２と巻き線３３の両方に接触する。 The mold resin 34 is a resin having higher thermal conductivity than at least the bobbin 36, and integrally seals the stator core 32, the winding wire 33, and the bobbin 36. The mold resin 34 is injected between the stator core 32 and the winding wire 33, filled between the winding wire 33 and the winding support portion 36a of the bobbin 36, and a lightening portion formed on the winding support portion 36a. 36b is filled. The mold resin 34 filled in the lightening portion 36 b overflows from the lightening portion 36 b and contacts both the stator core 32 and the winding wire 33.
　［ボビンの構成］
　図４は、実施例１のボビンを示す斜視図である。図５は、実施例１のコアセグメントとボビンを示す分解斜視図である。以下、図４及び図５に基づき、実施例１のボビンの構成を説明する。 [Bobbin configuration]
FIG. 4 is a perspective view illustrating the bobbin according to the first embodiment. FIG. 5 is an exploded perspective view illustrating the core segment and the bobbin according to the first embodiment. Hereinafter, the configuration of the bobbin according to the first embodiment will be described with reference to FIGS. 4 and 5.
　前記ボビン３６は、樹脂等の絶縁体によって形成され、図４に示すように、巻き線支持部３６ａと、肉抜き部３６ｂと、第１フランジ部３６ｃと、第２フランジ部３６ｄと、を有している。また、このボビン３６は、二つに分割可能な構造となっており、図５に示すように、ステータコア３２のティース部３５ｂを、モールドステータ３の軸線方向に沿って挟み込むことで装着される。 The bobbin 36 is formed of an insulating material such as resin, and as shown in FIG. 4, has a winding support part 36a, a lightening part 36b, a first flange part 36c, and a second flange part 36d. is doing. Further, the bobbin 36 has a structure that can be divided into two, and is mounted by sandwiching the teeth portion 35b of the stator core 32 along the axial direction of the molded stator 3 as shown in FIG.
　前記巻き線支持部３６ａは、ティース部３５ｂの外側を覆うと共に、このティース部３５ｂに巻回される巻き線３３を支持する。ここでは、ティース部３５ｂがモールドステータ３の内側に向かって延びる四角柱形状を呈しており、巻き線支持部３６ａは、このティース部３５ｂの四箇所の角部３５ｂ´の外側に設けられる。すなわち、この実施例１における巻き線支持部３６ａは、それぞれティース部３５ｂの角部３５ｂ´を覆う４箇所に設けられている。 The winding support part 36a covers the outside of the tooth part 35b and supports the winding 33 wound around the tooth part 35b. Here, the teeth part 35b has a quadrangular prism shape extending toward the inside of the mold stator 3, and the winding support part 36a is provided outside the four corners 35b 'of the tooth part 35b. That is, the winding support portions 36a in the first embodiment are provided at four locations that respectively cover the corner portions 35b ′ of the teeth portions 35b.
　前記肉抜き部３６ｂは、巻き線支持部３６ａに形成された切欠部分であり、ティース部３５ｂに巻回される巻き線３３によって覆われる。ここでは、４箇所の巻き線支持部３６ａの間に設けられた空隙部分がこの肉抜き部３６ｂに相当し、ティース部３５ｂのコイルエンド対向面３５ｄ及び周方向側面３５ｅのそれぞれに対応して形成されている。なお「コイルエンド対向面」とは、ステータコア３２に巻回される巻き線３３のコイルエンドに対向する面であり、モールドステータ３の軸線方向の端面である。また、「周方向側面」とは、モールドステータ３の周方向の端面である。 The said lightening part 36b is a notch part formed in the winding support part 36a, and is covered with the winding 33 wound around the teeth part 35b. Here, gap portions provided between the four winding support portions 36a correspond to the thinned portions 36b and are formed corresponding to the coil end facing surface 35d and the circumferential side surface 35e of the tooth portion 35b. Has been. The “coil end facing surface” is a surface facing the coil end of the winding 33 wound around the stator core 32 and is an end surface in the axial direction of the molded stator 3. The “circumferential side surface” is an end surface in the circumferential direction of the mold stator 3.
　前記第１,第２フランジ部３６ｃ,３６ｄは、それぞれ巻き線支持部３６ａの端部に設けられ、第１フランジ部３６ｃはステータコア３２のバックヨーク部３５ａと巻き線３３の間に介在し、第２フランジ部３６ｄはステータコア３２の鍔部３５ｃと巻き線３３の間に介在する。
この実施例１では、バックヨーク部３５ａ側の第１フランジ部３６ｃが、ティース部３５ｂの全周にわたって形成されている。一方、鍔部３５ｃ側の第２フランジ部３６ｄには、この第２フランジ部３６ｄを切り欠き、肉抜き部３６ｂに連通する連通部３６ｅが形成されている。つまり、この第２フランジ部３６ｄでは、肉抜き部３６ｂに対応した部分が切り欠かれ、巻き線支持部３６ａから連続する部分のみが形成されている。 The first and second flange portions 36c and 36d are respectively provided at the end portions of the winding support portion 36a. The first flange portion 36c is interposed between the back yoke portion 35a of the stator core 32 and the winding wire 33, and The two flange portions 36 d are interposed between the flange portion 35 c of the stator core 32 and the winding wire 33.
In the first embodiment, the first flange portion 36c on the back yoke portion 35a side is formed over the entire circumference of the tooth portion 35b. On the other hand, the second flange portion 36d on the side of the flange portion 35c is formed with a communication portion 36e that cuts out the second flange portion 36d and communicates with the lightening portion 36b. That is, in this 2nd flange part 36d, the part corresponding to the thinning part 36b is notched, and only the part which continues from the winding support part 36a is formed.
　［モールドステータの製造手順］
　図６は、実施例１のモールドステータの製造手順を示すフローチャートである。以下、図６に基づき、実施例１のモールドステータの製造手順について説明する。 [Mold Stator Manufacturing Procedure]
FIG. 6 is a flowchart illustrating a manufacturing procedure of the molded stator according to the first embodiment. Hereinafter, based on FIG. 6, the manufacturing procedure of the mold stator of Example 1 is demonstrated.
　ステップＳ１では、予め多数の電磁鋼板を積層して形成されたコアセグメント３２ａのティース部３５ｂに、ボビン３６を装着する。 In step S1, the bobbin 36 is mounted on the teeth 35b of the core segment 32a formed by previously laminating a number of electromagnetic steel plates.
　ステップＳ２では、ステップＳ１でのボビン３６の装着に続き、巻き線３３をティース部３５ｂに係合できる形に巻回した後、この巻き線３３をティース部３５ｂに取り付ける。このとき、巻き線３３は、ボビン３６の外側に取り付けられ、巻き線支持部３６ａによって支持されると共に、肉抜き部３６ｂを覆う。 In step S2, after the bobbin 36 is mounted in step S1, the winding wire 33 is wound into a shape that can be engaged with the tooth portion 35b, and then the winding wire 33 is attached to the tooth portion 35b. At this time, the winding wire 33 is attached to the outside of the bobbin 36, is supported by the winding wire support portion 36a, and covers the lightening portion 36b.
　ステップＳ３では、ステップＳ２での巻き線３３の取り付けに続き、巻き線３３を取り付けた複数のコアセグメント３２ａを円環状に並べ、ステータコア３２を組み立てる。 In step S3, following the attachment of the winding wire 33 in step S2, a plurality of core segments 32a to which the winding wire 33 is attached are arranged in an annular shape, and the stator core 32 is assembled.
　ステップＳ４では、ステップＳ３でのステータコア３２の組み立てに続き、ステータホルダ３１を加熱して膨張させ、膨張したステータホルダ３１の内側に組み立てたステータコア３２を嵌め込んでから冷却する。つまり、いわゆる焼きばめによってステータコア３２をステータホルダ３１に固定する。 In step S4, following the assembly of the stator core 32 in step S3, the stator holder 31 is heated and expanded, and the assembled stator core 32 is fitted inside the expanded stator holder 31, and then cooled. That is, the stator core 32 is fixed to the stator holder 31 by so-called shrink fitting.
　ステップＳ５では、ステップＳ４でのステータコア３２の固定に続き、ステータホルダ３１及びステータコア３２に、モールド型（図示せず）を取り付ける。このモールド型は、例えばモールドステータ３の軸線方向に２分割された樹脂成型型であり、ステータホルダ３１及びステータコア３２を挟み込んで型締めすることで取り付けられる。 In step S5, following the fixing of the stator core 32 in step S4, a mold (not shown) is attached to the stator holder 31 and the stator core 32. This mold is, for example, a resin mold that is divided into two in the axial direction of the mold stator 3, and is attached by sandwiching the stator holder 31 and the stator core 32 and clamping the mold.
　ステップＳ６では、ステップＳ５でのモールド型の取り付けに続き、型内にモールド樹脂３４を射出（充填）する。このとき、図７に示すように、ステータコア３２のティース部３５ｂと巻き線３３との間にモールド樹脂３４を射出する。すなわち、巻き線３３の内側に向けてモールド樹脂３４を射出する。
なお、この実施例１では、ボビン３６の第１フランジ部３６ｃ、第２フランジ部３６ｄのうち、ステータコア３２の鍔部３５ｃ側の第２フランジ部３６ｄに、この第２フランジ部３６ｄを貫通し、肉抜き部３６ｂに連通する連通部３６ｅが形成されている。そのため、ここでは、この連通部３６ｅに向けてモールド樹脂３４を射出する。これにより、連通部３６ｅに流れ込んだモールド樹脂３４は、まず、肉抜き部３６ｂに充填される。その後、この肉抜き部３６ｂから溢れ出し、巻き線支持部３６ａとティース部３５ｂの間や、巻き線支持部３６ａと巻き線３３の間に流れ込んでこれらの間に充填された後、巻き線３３の外側や巻き線３３の隙間に充填されることとなる。 In step S6, following the mounting of the mold in step S5, the mold resin 34 is injected (filled) into the mold. At this time, as shown in FIG. 7, the molding resin 34 is injected between the tooth portion 35 b of the stator core 32 and the winding wire 33. That is, the mold resin 34 is injected toward the inside of the winding wire 33.
In the first embodiment, of the first flange portion 36c and the second flange portion 36d of the bobbin 36, the second flange portion 36d on the flange 35c side of the stator core 32 is passed through the second flange portion 36d, A communication portion 36e that communicates with the lightening portion 36b is formed. Therefore, here, the mold resin 34 is injected toward the communication portion 36e. As a result, the mold resin 34 that has flowed into the communication portion 36e is first filled into the lightening portion 36b. After that, it overflows from the lightening portion 36b, flows between the winding support portion 36a and the teeth portion 35b, or between the winding support portion 36a and the winding wire 33, and is filled between them. And the gaps between the windings 33 are filled.
　ステップＳ７では、ステップＳ６でのモールド樹脂３４の射出に続き、冷却してモールド樹脂３４を硬化させた後、モールド型を取り外し、モールドステータ３の組み立てを完了する。 In step S7, following the injection of the mold resin 34 in step S6, the mold resin 34 is cooled and cured, and then the mold is removed and the assembly of the mold stator 3 is completed.
　次に、作用を説明する。
　まず、「比較例のボビン構造とその課題」を説明し、続いて、実施例１の電動機のボビン構造における作用を、「熱伝導作用」、「組立時における特徴的作用」に分けて説明する。 Next, the operation will be described.
First, “the bobbin structure of the comparative example and its problems” will be described, and then the operation in the bobbin structure of the electric motor of the first embodiment will be divided into “thermal conduction operation” and “characteristic operation during assembly”. .
　［比較例のボビン構造とその課題］
　図８Ａは第１比較例のボビン構造における熱伝導経路を示す説明図であり、図８Ｂは第２比較例のボビン構造における熱伝導経路を示す説明図であり、図８Ｃは第３比較例のボビン構造における熱伝導経路を示す説明図である。以下、図８Ａ～図８Ｃに基づき、比較例のボビン構造とその課題を説明する。 [Comparative bobbin structure and problems]
FIG. 8A is an explanatory diagram showing a heat conduction path in the bobbin structure of the first comparative example, FIG. 8B is an explanatory diagram showing a heat conduction path in the bobbin structure of the second comparative example, and FIG. 8C is a diagram of the third comparative example. It is explanatory drawing which shows the heat conduction path | route in a bobbin structure. Hereinafter, the bobbin structure of the comparative example and its problem will be described with reference to FIGS. 8A to 8C.
　図８Ａに示す第１比較例のボビン構造では、ステータコア６０の外側にボビン６１を設け、その外側に巻き線６２を巻回する。そして、巻き線６２を巻回後、ワニス６３を滴下し、巻き線６２をワニス６３によってコーティングする。
すなわち、ステータコア６０と巻き線６２の間にボビン６１が介在し、さらに、巻き線６２の外側がワニス６３によって覆われる。 In the bobbin structure of the first comparative example shown in FIG. 8A, the bobbin 61 is provided outside the stator core 60, and the winding 62 is wound around the outside. And after winding the winding 62, the varnish 63 is dripped and the winding 62 is coated with the varnish 63. FIG.
That is, the bobbin 61 is interposed between the stator core 60 and the winding 62, and the outside of the winding 62 is covered with the varnish 63.
　また、ボビン６１の周囲にはワニス６３が入り込まないため、このボビン６１の周囲空間となるステータコア６０とボビン６１の間、及び、ボビン６１と巻き線６２の間には、熱抵抗の高い空気層（空隙）６４が存在する。 Further, since the varnish 63 does not enter the periphery of the bobbin 61, an air layer having a high thermal resistance is formed between the stator core 60 and the bobbin 61, and between the bobbin 61 and the winding wire 62. (Void) 64 exists.
　そして、この第１比較例のボビン構造では、巻き線６２から発生した熱は、図８Ａにおいて矢印で示すように、巻き線６２→空気層６４→ボビン６１→空気層６４→ステータコア６０と順に伝達され、ステータコア６０より放熱される。つまり、巻き線６２とステータコア６０の間に熱抵抗の高い空気層６４やボビン６１が介在する。このため、巻き線６２の熱はステータコア６０に伝達されにくく、熱伝導効率が悪いという問題があった。 In the bobbin structure of the first comparative example, the heat generated from the winding 62 is transmitted in the order of the winding 62 → the air layer 64 → the bobbin 61 → the air layer 64 → the stator core 60 as indicated by an arrow in FIG. 8A. Then, heat is radiated from the stator core 60. That is, the air layer 64 and the bobbin 61 having high thermal resistance are interposed between the winding 62 and the stator core 60. For this reason, there is a problem that the heat of the winding 62 is not easily transmitted to the stator core 60 and the heat conduction efficiency is poor.
　これに対し、図８Ｂに示す第２比較例のボビン構造では、ボビン６１と巻き線６２の間に、このボビン６１よりも熱伝導性の高いモールド樹脂６５を充填している。また、図８Ｃに示す第３比較例のボビン構造では、ボビン６１とステータコア６０の間に、このボビン６１よりも熱伝導性の高いモールド樹脂６５を充填している。 On the other hand, in the bobbin structure of the second comparative example shown in FIG. 8B, the mold resin 65 having higher thermal conductivity than the bobbin 61 is filled between the bobbin 61 and the winding 62. Further, in the bobbin structure of the third comparative example shown in FIG. 8C, a mold resin 65 having higher thermal conductivity than the bobbin 61 is filled between the bobbin 61 and the stator core 60.
　これらの第２比較例及び第３比較例の場合では、モールド樹脂６５によって空気層が埋められ、図８Ｂ,図８Ｃに示す矢印のように、このモールド樹脂６５を介して伝熱する。これにより、図８Ａに示す第１比較例よりも熱伝導性能の向上を図ることができる。しかしながら、ボビン６１の周囲には、依然として空気層６４が残っている上、熱伝導はモールド樹脂６５よりも熱伝導性の低いボビン６１を必ず通して行われる。そのため、この空気層６４やボビン６１が熱抵抗要因となって、熱伝導効率の向上を図ることが困難になっている。 In the case of the second comparative example and the third comparative example, the air layer is filled with the mold resin 65, and heat is transferred through the mold resin 65 as shown by arrows in FIGS. 8B and 8C. Thereby, the heat conduction performance can be improved as compared with the first comparative example shown in FIG. 8A. However, the air layer 64 still remains around the bobbin 61 and heat conduction is always performed through the bobbin 61 having lower heat conductivity than the mold resin 65. For this reason, the air layer 64 and the bobbin 61 become thermal resistance factors, and it is difficult to improve the heat conduction efficiency.
　［熱伝導作用］
　図９は、実施例１のボビン構造における熱伝導経路を示す説明図である。以下、図９に基づき、実施例１のボビン構造における熱伝導作用について説明する。 [Heat conduction]
FIG. 9 is an explanatory diagram illustrating a heat conduction path in the bobbin structure according to the first embodiment. Hereinafter, based on FIG. 9, the heat conductive action in the bobbin structure of Example 1 will be described.
　実施例１のボビン構造では、ステータコア３２のティース部３５ｂに設けたボビン３６が、巻き線支持部３６ａと肉抜き部３６ｂを備えている。そして、巻き線３３は、ボビン３６を介してティース部３５ｂの外側に巻回される。このとき、巻き線３３は巻き線支持部３６ａによって支持されると共に、肉抜き部３６ｂを覆う。さらに、ステータコア３２と巻き線３３の間に、ボビン３６よりも熱伝導性の高いモールド樹脂３４が充填されている。 In the bobbin structure of the first embodiment, the bobbin 36 provided on the tooth portion 35b of the stator core 32 includes a winding support portion 36a and a lightening portion 36b. Then, the winding wire 33 is wound around the outside of the tooth portion 35 b via the bobbin 36. At this time, the winding wire 33 is supported by the winding wire support portion 36a and covers the lightening portion 36b. Further, a mold resin 34 having higher thermal conductivity than the bobbin 36 is filled between the stator core 32 and the winding wire 33.
　ここで、巻き線３３とボビン３６の間に射出（充填）されたモールド樹脂３４のうち、ボビン３６の肉抜き部３６ｂ内に充填されたモールド樹脂３４は、ステータコア３２と巻き線３３の両方に密着する。また、巻き線支持部３６ａの外側に沿って流れたモールド樹脂３４は、ボビン３６とステータコア３２の間に入り込めず、このボビン３６とステータコア３２の間には空気層６４が生じる。つまり、ステータコア３２と巻き線３３との間には、巻き線支持部３６ａとモールド樹脂３４を介在させた領域Ｘと、肉抜き部３６ｂに充填されて巻き線３３とステータコア３２の両方に接触するモールド樹脂３４のみを介在させた領域Ｙと、が設けられる。 Here, of the mold resin 34 injected (filled) between the winding wire 33 and the bobbin 36, the mold resin 34 filled in the hollow portion 36 b of the bobbin 36 is applied to both the stator core 32 and the winding wire 33. In close contact. Further, the mold resin 34 that flows along the outside of the winding support 36 a cannot enter between the bobbin 36 and the stator core 32, and an air layer 64 is generated between the bobbin 36 and the stator core 32. That is, between the stator core 32 and the winding 33, the region X in which the winding support portion 36 a and the mold resin 34 are interposed, and the lightening portion 36 b are filled and contact both the winding 33 and the stator core 32. A region Y in which only the mold resin 34 is interposed is provided.
　そして、このような実施例１のボビン構造では、巻き線３３から発生した熱を放熱する際の熱伝導経路として、領域Ｘを通過する図９に矢印αで示す第１の熱伝導経路と、領域Ｙを通過する図９に矢印βで示す第２の熱伝達経路の、二つの熱伝導経路がある。 And in such a bobbin structure of Example 1, as a heat conduction path at the time of radiating the heat generated from the winding 33, a first heat conduction path indicated by an arrow α in FIG. There are two heat conduction paths that pass through region Y, the second heat transfer path indicated by arrow β in FIG.
　矢印αで示す第１の熱伝導経路では、巻き線３３から発生した熱は、まず、この巻き線３３の周囲に充填されたモールド樹脂３４に伝達される。そして、ボビン３６の巻き線支持部３６ａに伝達され、空気層６４を介してステータコア３２へと伝わっていく。つまり、この第１の熱伝導経路（矢印α）では、上記第２の比較例と同じ現象によって熱伝導が行われる。 In the first heat conduction path indicated by the arrow α, the heat generated from the winding 33 is first transmitted to the mold resin 34 filled around the winding 33. Then, it is transmitted to the winding support portion 36 a of the bobbin 36 and is transmitted to the stator core 32 through the air layer 64. That is, in the first heat conduction path (arrow α), heat conduction is performed by the same phenomenon as in the second comparative example.
　一方、矢印βで示す第２の熱伝導経路では、巻き線３３から発生した熱は、まず、この巻き線３３の周囲に充填されたモールド樹脂３４に伝達される。ここで、第２の熱伝導経路（矢印β）は、肉抜き部３６ｂに充填されて巻き線３３とステータコア３２の両方に接触するモールド樹脂３４を介在させた領域Ｙを通過する。そのため、この第２の熱伝導経路（矢印β）では、モールド樹脂３４に伝わった熱は、このモールド樹脂３４からステータコア３２へと直接伝達され、ステータコア３２から放熱される。つまり、この第２の熱伝導経路（矢印β）では、熱抵抗要因になってしまう空気層６４やボビン３６を介することなく、高熱伝導樹脂であるモールド樹脂３４のみを介して放熱することができる。このため、第２の熱伝導経路（矢印β）では、熱伝導性が向上し、効率よく熱伝導を行うことができる。 On the other hand, in the second heat conduction path indicated by the arrow β, the heat generated from the winding 33 is first transmitted to the mold resin 34 filled around the winding 33. Here, the second heat conduction path (arrow β) passes through the region Y in which the thinned portion 36b is filled and the mold resin 34 that contacts both the winding wire 33 and the stator core 32 is interposed. Therefore, in the second heat conduction path (arrow β), the heat transferred to the mold resin 34 is directly transferred from the mold resin 34 to the stator core 32 and is radiated from the stator core 32. That is, in the second heat conduction path (arrow β), heat can be radiated only through the mold resin 34 which is a high heat conduction resin without going through the air layer 64 or the bobbin 36 which becomes a heat resistance factor. . For this reason, in the second heat conduction path (arrow β), the heat conductivity is improved and heat conduction can be performed efficiently.
　なお、第１の熱伝達経路（矢印α）では、巻き線支持部３６ａが熱抵抗要因になってしまうが、この巻き線支持部３６ａによって巻き線３３とステータコア３２との間の絶縁性を確実に確保することができる。すなわち、モールド樹脂３４を射出する際に、樹脂流入の衝撃によって巻き線３３の位置ずれが生じやすいが、この巻き線支持部３６ａによって巻き線３３の位置ずれを防止して、絶縁性を確保することができる。
また、肉抜き部３６ｂにおける絶縁性は、この肉抜き部３６ｂに流れ込んだモールド樹脂３４によって確保することができる。 In the first heat transfer path (arrow α), the winding support portion 36a becomes a thermal resistance factor, but this winding support portion 36a ensures insulation between the winding 33 and the stator core 32. Can be secured. That is, when the mold resin 34 is injected, the winding 33 is likely to be displaced due to the impact of the resin inflow, but the winding support portion 36a prevents the winding 33 from being displaced and ensures insulation. be able to.
Further, the insulating property of the lightening portion 36b can be ensured by the mold resin 34 flowing into the lightening portion 36b.
　そして、実施例１のボビン構造では、ステータコア３２のティース部３５ｂが四角柱形状を呈し、巻き線支持部３６ａは、このティース部３５ｂの四箇所の角部３５ｂ´の外側に設けられている。そのため、肉抜き部３６ｂが、ティース部３５ｂのコイルエンド対向面３５ｄ及び周方向側面３５ｅのそれぞれに対応して形成されることとなる。 In the bobbin structure of the first embodiment, the teeth portion 35b of the stator core 32 has a quadrangular prism shape, and the winding support portion 36a is provided outside the four corner portions 35b ′ of the teeth portion 35b. Therefore, the lightening portion 36b is formed corresponding to each of the coil end facing surface 35d and the circumferential side surface 35e of the tooth portion 35b.
　これにより、肉抜き部３６ｂがティース部３５ｂに対向する面積を、巻き線支持部３６ａがティース部３５ｂに対向する面積よりも比較的大きく確保することができ、熱伝導性の高い第２の熱伝達経路（矢印β）による熱伝導を主体にした放熱を行うことができる。
そのため、さらに効率よく熱伝導を行うことができ、放熱性能を高めることができる。 As a result, the area where the thinned portion 36b faces the teeth portion 35b can be ensured to be relatively larger than the area where the winding support portion 36a faces the teeth portion 35b, and the second heat having high thermal conductivity. It is possible to dissipate heat mainly using heat conduction through the transmission path (arrow β).
Therefore, heat conduction can be performed more efficiently and heat dissipation performance can be improved.
　さらに、実施例１のボビン構造では、鍔部３５ｃ側の他方のフランジ部３６ｄに、このフランジ部３６ｄを貫通し、肉抜き部３６ｂに連通する連通部３６ｅが形成されている。
そのため、モールド樹脂３４を射出する際に、この連通部３６ｅを介して肉抜き部３６ｂへとモールド樹脂３４が流れ込む。これにより、肉抜き部３６ｂへ安定的にモールド樹脂３４を充填することができ、空気を巻き込むことなくモールド樹脂３４の射出を行うことができる。 Furthermore, in the bobbin structure according to the first embodiment, the other flange portion 36d on the flange portion 35c side is formed with a communication portion 36e that penetrates the flange portion 36d and communicates with the lightening portion 36b.
Therefore, when the mold resin 34 is injected, the mold resin 34 flows into the lightening portion 36b through the communication portion 36e. As a result, the mold resin 34 can be stably filled into the thinned portion 36b, and the mold resin 34 can be injected without entraining air.
　［組立時における特徴的作用］
　実施例１の電動機のボビン構造において、ステータコア３２の外側にボビン３６を介して巻き線３３を巻回した後、ステップＳ６でのモールド樹脂３４の射出の際、図７に示すように、巻き線３３の内側に向けてモールド樹脂３４を射出する。つまり、ステータコア３２のティース部３５ｂと巻き線３３との間にモールド樹脂３４を射出する。 [Characteristic action during assembly]
In the bobbin structure of the electric motor of Example 1, after winding the winding wire 33 on the outside of the stator core 32 via the bobbin 36, when the molding resin 34 is injected in step S6, as shown in FIG. The mold resin 34 is injected toward the inside of the 33. That is, the mold resin 34 is injected between the tooth portion 35 b of the stator core 32 and the winding wire 33.
　これにより、肉抜き部３６ｂのようにティース部３５ｂと巻き線３３の間が連通している部分であっても、モールド樹脂３４を確実に流し込むことができる。そのため、モールド樹脂３４によって巻き線３３がティース部３５ｂに接触することを防止でき、ティース部３５ｂと巻き線３３との間の絶縁性を確保することができる。 Thus, the mold resin 34 can be reliably poured even in a portion where the teeth portion 35b and the winding wire 33 communicate with each other like the thinned portion 36b. Therefore, it is possible to prevent the winding wire 33 from coming into contact with the tooth portion 35 b by the mold resin 34, and to ensure insulation between the tooth portion 35 b and the winding wire 33.
　次に、効果を説明する。
　実施例１の電動機のボビン構造及びその製造方法にあっては、下記に挙げる効果を得ることができる。 Next, the effect will be described.
In the bobbin structure of the electric motor and the manufacturing method thereof according to the first embodiment, the following effects can be obtained.
　(1) 巻き線３３が巻回されるステータコア３２と、
　前記ステータコア３２の外側を覆うと共に前記巻き線３３を支持する巻き線支持部３６ａと、前記巻き線支持部３６ａに形成されると共に前記巻き線３３に覆われる肉抜き部３６ｂと、を有する絶縁体からなるボビン３６と、
　前記ステータコア３２と、前記ボビン３６と、前記巻き線３３を一体的に封止すると共に、前記ボビン３６よりも熱伝導性の高いモールド樹脂３４と、を備え、
　前記モールド樹脂３４を、前記肉抜き部３６ｂの少なくとも一部に充填し、前記ステータコア３２と前記巻き線３３とに接触させる構成とした。
　このため、巻き線３３から発生した熱をステータコア３２へ効率よく伝達し、伝熱性能を向上することができる。 (1) a stator core 32 around which the winding wire 33 is wound;
An insulator having a winding support portion 36 a that covers the outside of the stator core 32 and supports the winding wire 33, and a lightening portion 36 b that is formed on the winding support portion 36 a and is covered with the winding wire 33. A bobbin 36 comprising:
The stator core 32, the bobbin 36, and the winding wire 33 are integrally sealed, and a mold resin 34 having higher thermal conductivity than the bobbin 36 is provided.
The mold resin 34 is filled into at least a part of the lightening portion 36 b and is brought into contact with the stator core 32 and the winding wire 33.
For this reason, the heat generated from the winding 33 can be efficiently transmitted to the stator core 32, and the heat transfer performance can be improved.
　(2) 前記ステータコア３２は、角柱状のティース部３５ｂを有し、
　前記巻き線支持部３６ａを、前記ティース部３５ｂの角部３５ｂ´の外側に設ける構成とした。
　このため、肉抜き部３６ｂがティース部３５ｂに対向する面積を、巻き線支持部３６ａがティース部３５ｂに対向する面積よりも比較的大きく確保し、熱伝導性の高い第２の熱伝導経路（矢印β）を主体とした放熱を行うことができて、放熱性能の更なる向上を図ることができる。 (2) The stator core 32 has a prismatic teeth portion 35b,
The said winding support part 36a was set as the structure provided in the outer side of corner | angular part 35b 'of the said teeth part 35b.
For this reason, the area where the lightening portion 36b faces the teeth portion 35b is ensured to be relatively larger than the area where the winding support portion 36a faces the teeth portion 35b, and the second heat conduction path ( Heat can be radiated mainly by the arrow β), and the heat radiation performance can be further improved.
　(3) 前記ボビン３６は、前記巻き線支持部３６ａの少なくとも一方の端部に形成されるフランジ部３６ｄと、
　前記フランジ部３６ｄを貫通し、前記肉抜き部３６ｂに連通する連通部３６ｅを有する構成とした。
　このため、連通部３６ｅを介して肉抜き部３６ｂへとモールド樹脂３４が速やかに流れ込み、肉抜き部３６ｂに安定的にモールド樹脂３４を充填することができる。 (3) The bobbin 36 includes a flange portion 36d formed on at least one end of the winding support portion 36a;
A configuration is adopted in which a communicating portion 36e that penetrates through the flange portion 36d and communicates with the lightening portion 36b is provided.
For this reason, the mold resin 34 quickly flows into the lightening portion 36b through the communication portion 36e, and the thinning portion 36b can be stably filled with the mold resin 34.
　(4) 巻き線３３が巻回されるステータコア３２と、
　前記ステータコア３２の外側を覆うと共に前記巻き線３３を支持する巻き線支持部３６ａと、前記巻き線支持部３６ａに形成されると共に前記巻き線３３に覆われる肉抜き部３６ｂと、を有する絶縁体からなるボビン３６と、
　前記ステータコア３２と、前記ボビン３６と、前記巻き線３３を一体的に封止すると共に、前記ボビン３６よりも熱伝導性の高いモールド樹脂３４と、を備えた電動機（モータ）１のボビン構造の製造方法において、
　前記ステータコア３２の外側に前記ボビン３６を介して前記巻き線３３を巻回した後、前記巻き線３３の内側に向けて前記モールド樹脂３４を射出し、前記肉抜き部３６ｂの少なくとも一部に前記モールド樹脂３４を充填すると共に、前記肉抜き部３６ｂに充填されたモールド樹脂３４を前記ステータコア３２と前記巻き線３３とに接触させる構成とした。
　このため、モールド樹脂３４により巻き線３３がティース部３５ｂに接触することを防止し、巻き線３３とティース部３５ｂの間の絶縁性を確保することができる。 (4) a stator core 32 around which the winding wire 33 is wound;
An insulator having a winding support portion 36 a that covers the outside of the stator core 32 and supports the winding wire 33, and a lightening portion 36 b that is formed on the winding support portion 36 a and is covered with the winding wire 33. A bobbin 36 comprising:
The bobbin structure of the electric motor (motor) 1 includes the stator core 32, the bobbin 36, and the winding wire 33 integrally sealed and a mold resin 34 having higher thermal conductivity than the bobbin 36. In the manufacturing method,
After winding the winding wire 33 on the outer side of the stator core 32 via the bobbin 36, the mold resin 34 is injected toward the inner side of the winding wire 33, and at least a part of the lightening portion 36b is The mold resin 34 is filled, and the mold resin 34 filled in the thinned portion 36 b is brought into contact with the stator core 32 and the winding wire 33.
For this reason, it is possible to prevent the winding wire 33 from coming into contact with the tooth portion 35b by the mold resin 34 and to ensure insulation between the winding wire 33 and the tooth portion 35b.
　（実施例２）
　実施例２のボビン構造は、巻き線支持部を、ステータコアの軸線方向に沿って設ける例である。 (Example 2)
The bobbin structure of the second embodiment is an example in which the winding support portion is provided along the axial direction of the stator core.
　図１０は、実施例２のボビンを示す斜視図である。以下、図１０に基づき、実施例２のボビン構造を説明する。 FIG. 10 is a perspective view showing the bobbin of the second embodiment. Hereinafter, the bobbin structure of the second embodiment will be described with reference to FIG.
　実施例２のボビン７０は、図１０に示すように、巻き線支持部７１と、肉抜き部７２と、第１フランジ部７３ａと、第２フランジ部７３ｂと、を備えている。 As shown in FIG. 10, the bobbin 70 of the second embodiment includes a winding support portion 71, a lightening portion 72, a first flange portion 73a, and a second flange portion 73b.
　前記巻き線支持部７１は、四角柱形状のティース部３５ｂの周方向側面３５ｅ（図３参照）の外側に設けられる。すなわち、この実施例２における巻き線支持部７１は、ステータコア３２の軸線方向に沿って設けられる。 The said winding support part 71 is provided in the outer side of the circumferential direction side surface 35e (refer FIG. 3) of the teeth part 35b of a quadratic prism shape. That is, the winding support 71 in the second embodiment is provided along the axial direction of the stator core 32.
　前記肉抜き部７２は、ティース部３５ｂのコイルエンド対向面３５ｄ（図３参照）に対応して形成されている。すなわち、この肉抜き部７２は、ティース部３５ｂの周面を全周にわたって覆う巻き線支持部のうち、コイルエンド対向面３５ｄに対向する部分を切り欠くことで形成される。 The said thinning part 72 is formed corresponding to the coil end opposing surface 35d (refer FIG. 3) of the teeth part 35b. That is, the thinned portion 72 is formed by cutting out a portion facing the coil end facing surface 35d in the winding support portion that covers the entire circumferential surface of the tooth portion 35b.
　前記一対のフランジ部７３ａ,７３ｂは、それぞれティース部３５ｂの全周にわたって形成され、バックヨーク部３５ａと鍔部３５ｃ（図５参照）に沿って延在される。 The pair of flange portions 73a and 73b are respectively formed over the entire circumference of the tooth portion 35b, and extend along the back yoke portion 35a and the flange portion 35c (see FIG. 5).
　つまり、このような実施例２では、ボビン７０の巻き線支持部７１がステータコア３２（図５参照）の軸線方向に沿って設けられ、肉抜き部７２がティース部３５ｂのコイルエンド対向面３５ｄに対応する位置に形成されている。 That is, in the second embodiment, the winding support portion 71 of the bobbin 70 is provided along the axial direction of the stator core 32 (see FIG. 5), and the lightening portion 72 is formed on the coil end facing surface 35d of the teeth portion 35b. It is formed in the corresponding position.
　このため、比較的熱抵抗が高くて熱伝導性の低い、ステータコア３２と巻き線（不図示）との間に生じる「巻き線支持部７１とモールド樹脂を介在させた領域」は、モールドステータ３（図２参照）の軸線方向に沿うこととなる。一方、比較的熱抵抗が低くて熱伝導性の高い、ステータコア３２と巻き線（不図示）との間に生じる「モールド樹脂のみを介在させた領域」は、巻き線（不図示）のコイルエンドに対向して設けられることとなる。
これにより、比較的軸線方向寸法の短い短軸のモールドステータ３において、放熱のしにくいコイルエンドからの放熱性能の向上を図ることができる。
また、ステータコア３２の周方向側面３５ｅと巻き線（不図示）との接触を確実に防止することができる。 For this reason, the “region where the winding support portion 71 and the mold resin are interposed” generated between the stator core 32 and the winding (not shown), which has a relatively high thermal resistance and low thermal conductivity, is the molded stator 3. (See FIG. 2). On the other hand, the “region where only the mold resin is interposed” generated between the stator core 32 and the winding (not shown) having a relatively low thermal resistance and high thermal conductivity is the coil end of the winding (not shown). It will be provided opposite to.
As a result, in the short-axis molded stator 3 having a relatively short dimension in the axial direction, it is possible to improve the heat dissipation performance from the coil end that is difficult to dissipate heat.
In addition, contact between the circumferential side surface 35e of the stator core 32 and a winding (not shown) can be reliably prevented.
　すなわち、実施例２の電動機のボビン構造にあっては、下記に挙げる効果を得ることができる。 That is, in the bobbin structure of the electric motor of Example 2, the following effects can be obtained.
　(5) 前記巻き線支持部７１を、前記ステータコア３２の軸線方向に沿って設ける構成とした。
　このため、比較的軸方向寸法の短いモールドステータであっても、放熱性能を向上させると共に、ステータコア３２の軸線方向の絶縁性を確保することができる。 (5) The winding support portion 71 is configured to be provided along the axial direction of the stator core 32.
For this reason, even if it is a mold stator with a comparatively short axial dimension, while improving heat dissipation performance, the insulation of the stator core 32 in the axial direction can be ensured.
　（実施例３）
　実施例３のボビン構造は、巻き線支持部を、巻き線のコイルエンド部に対応する位置に設ける例である。 (Example 3)
The bobbin structure of the third embodiment is an example in which the winding support portion is provided at a position corresponding to the coil end portion of the winding.
　図１１は、実施例３のボビンを示す斜視図である。以下、図１１に基づき、実施例３のボビン構造を説明する。 FIG. 11 is a perspective view showing the bobbin of the third embodiment. Hereinafter, the bobbin structure of Example 3 will be described with reference to FIG.
　実施例３のボビン７４は、図１１に示すように、巻き線支持部７５と、肉抜き部７６と、一対のフランジ部７７ａ,７７ｂと、を備えている。また、このボビン７４は、分割線７８を介して二つに分割可能な構造となっており、ステータコア３２のティース部３５ｂ（図３参照）を、モールドステータ３（図２参照）の周方向に沿って挟み込むことで、ステータコア３２に装着される。 As shown in FIG. 11, the bobbin 74 according to the third embodiment includes a winding support portion 75, a lightening portion 76, and a pair of flange portions 77a and 77b. Further, the bobbin 74 has a structure that can be divided into two via a dividing line 78, and the teeth portion 35b (see FIG. 3) of the stator core 32 is arranged in the circumferential direction of the molded stator 3 (see FIG. 2). The stator core 32 is attached by being sandwiched along.
　前記巻き線支持部７５は、四角柱形状のティース部３５ｂのコイルエンド対向面３５ｄ（図３参照）の外側に設けられる。すなわち、この実施例２における巻き線支持部７１は、巻き線３３（図３参照）のコイルエンドに対応する位置に設けられる。 The said winding support part 75 is provided in the outer side of the coil end opposing surface 35d (refer FIG. 3) of the teeth part 35b of a quadratic prism shape. That is, the winding support 71 in the second embodiment is provided at a position corresponding to the coil end of the winding 33 (see FIG. 3).
　前記肉抜き部７６は、ティース部３５ｂの周方向側面３５ｅ（図３参照）に対応して形成されている。すなわち、この肉抜き部７６は、ティース部３５ｂの周面を全周にわたって覆う巻き線支持部のうち、周方向側面３５ｅに対向する部分を切り欠くことで形成される。 The said thinning part 76 is formed corresponding to the circumferential side surface 35e (refer FIG. 3) of the teeth part 35b. In other words, the thinned portion 76 is formed by cutting out a portion facing the circumferential side surface 35e in the winding support portion that covers the entire circumference of the tooth portion 35b.
　前記一対のフランジ部７７ａ,７７ｂは、それぞれティース部３５ｂの全周にわたって形成され、バックヨーク部３５ａと鍔部３５ｃ（図５参照）に沿って延在される。 The pair of flange portions 77a and 77b are respectively formed over the entire circumference of the tooth portion 35b, and extend along the back yoke portion 35a and the flange portion 35c (see FIG. 5).
　つまり、このような実施例３では、ボビン７４の巻き線支持部７５が巻き線３３（図３参照）のコイルエンドに対応する位置に設けられ、肉抜き部７６がティース部３５ｂの周方向側面３５ｅに対向する位置に形成されている。 That is, in the third embodiment, the winding support portion 75 of the bobbin 74 is provided at a position corresponding to the coil end of the winding wire 33 (see FIG. 3), and the lightening portion 76 is a circumferential side surface of the tooth portion 35b. It is formed at a position facing 35e.
　このため、比較的熱抵抗が高くて熱伝導性の低い、ステータコア３２と巻き線３３との間に生じる「巻き線支持部７５とモールド樹脂を介在させた領域」は、巻き線３３のコイルエンドに対向して設けられることとなる。一方、比較的熱抵抗が低くて熱伝導性の高い、ステータコア３２と巻き線（不図示）との間に生じる「モールド樹脂のみを介在させた領域」は、モールドステータ３（図２参照）の軸線方向に沿うこととなる。これにより、比較的軸線方向寸法の長い長軸のモールドステータ３において、放熱のしにくい周方向側面３５ｅからの放熱性能の向上を図ることができる。 Therefore, the “region where the winding support 75 and the mold resin are interposed” generated between the stator core 32 and the winding 33, which has a relatively high thermal resistance and low thermal conductivity, is the coil end of the winding 33. It will be provided opposite to. On the other hand, the “region where only the molding resin is interposed” generated between the stator core 32 and the winding (not shown), which has a relatively low thermal resistance and high thermal conductivity, is the mold stator 3 (see FIG. 2). It will be along the axial direction. Thereby, in the long-axis mold stator 3 having a relatively long dimension in the axial direction, it is possible to improve the heat dissipation performance from the circumferential side surface 35e that is difficult to dissipate heat.
　また、肉抜き部７６を、図１１に示すように周方向側面３５ｅの長手方向中央部に対向する位置に形成することで、ステータコア３２の周方向側面３５ｅと巻き線（不図示）との高い絶縁性も確保することができる。 Further, by forming the thinned portion 76 at a position facing the central portion in the longitudinal direction of the circumferential side surface 35e as shown in FIG. 11, the circumferential side surface 35e of the stator core 32 and the winding (not shown) are high. Insulation can also be secured.
　すなわち、実施例３の電動機のボビン構造にあっては、下記に挙げる効果を得ることができる。 That is, in the bobbin structure of the electric motor of Example 3, the following effects can be obtained.
　(6) 前記巻き線支持部７１を、前記巻き線３３のコイルエンドに対応する位置に設ける構成とした。
　このため、比較的軸方向寸法の長いモールドステータであっても、放熱性能を向上させることができる。 (6) The winding support portion 71 is provided at a position corresponding to the coil end of the winding 33.
For this reason, even if it is a mold stator with a comparatively long axial dimension, heat dissipation performance can be improved.
　（実施例４）
　実施例４のボビン構造は、巻き線の外側を区画するパーティション部を有する例である。 Example 4
The bobbin structure of Example 4 is an example having a partition portion that partitions the outside of the winding.
　図１２は、実施例４のボビンを示す斜視図である。図１３は、実施例４のボビン構造を適用したモールドステータを示す要部断面図である。以下、図１２及び図１３に基づき、実施例４のボビン構造を説明する。 FIG. 12 is a perspective view showing the bobbin of the fourth embodiment. FIG. 13 is a cross-sectional view of a main part showing a molded stator to which the bobbin structure of the fourth embodiment is applied. Hereinafter, the bobbin structure of the fourth embodiment will be described with reference to FIGS. 12 and 13.
　実施例４のボビン８０は、図１２に示すように、巻き線支持部８１と、肉抜き部８２と、一対のフランジ部８３ａ,８３ｂと、パーティション部８４と、を備えている。
ここで、前記巻き線支持部８１、肉抜き部８２、一対のフランジ部８３ａ,８３ｂについては、実施例１と同一の構成であるため、説明を省略する。 As shown in FIG. 12, the bobbin 80 of the fourth embodiment includes a winding support portion 81, a lightening portion 82, a pair of flange portions 83 a and 83 b, and a partition portion 84.
Here, since the winding support part 81, the lightening part 82, and the pair of flange parts 83a and 83b have the same configuration as in the first embodiment, the description thereof is omitted.
　前記パーティション部８４は、ステータコア３２のバックヨーク部３５ａと巻き線３３の間に介在する一方のフランジ部８３ａの周方向端部８３ａ´から、ステータコア３２の内側に向かって延在された平板である。このパーティション部８４によって、ステータコア３２のティース部３５ｂに巻回された巻き線３３の外側が区画される。 The partition portion 84 is a flat plate extending toward the inside of the stator core 32 from a circumferential end portion 83 a ′ of one flange portion 83 a interposed between the back yoke portion 35 a of the stator core 32 and the winding wire 33. . The partition part 84 defines the outside of the winding 33 wound around the tooth part 35 b of the stator core 32.
　つまり、このような実施例４では、パーティション部８４により、図１３に示すように、隣接する巻き線３３同士が仕切られる。 That is, in Example 4 as described above, the adjacent windings 33 are partitioned by the partition portion 84 as shown in FIG.
　これにより、モールド樹脂３４の射出時の衝撃によって巻き線３３の位置ずれが生じた場合であっても、隣接する巻き線３３同士の接触を防止し、絶縁性を確保することができる。 Thereby, even when the position of the winding 33 is displaced due to an impact at the time of injection of the mold resin 34, it is possible to prevent the adjacent windings 33 from contacting each other and to ensure insulation.
　すなわち、この実施例４の電動機のボビン構造にあっては、下記に挙げる効果を得ることができる。 That is, in the bobbin structure of the electric motor of Example 4, the following effects can be obtained.
　(7) 前記ボビン８０は、前記巻き線３３の外側を区画するパーティション部８４を有する構成とした。
　このため、隣接する巻き線３３同士の接触を防止し、絶縁性を確保することができる。 (7) The bobbin 80 has a partition portion 84 that partitions the outside of the winding wire 33.
For this reason, contact between adjacent windings 33 can be prevented and insulation can be secured.
　（実施例５）
　実施例５のボビン構造は、ステータコアのバックヨーク部側のフランジ部に連通部を設けた例である。 (Example 5)
The bobbin structure of the fifth embodiment is an example in which a communicating portion is provided in the flange portion on the back yoke portion side of the stator core.
　図１４は、実施例５のボビンを示す斜視図である。以下、図１４に基づき、実施例５のボビン構造を説明する。 FIG. 14 is a perspective view showing the bobbin of the fifth embodiment. Hereinafter, the bobbin structure of the fifth embodiment will be described with reference to FIG.
　実施例５のボビン８５は、図１４に示すように、巻き線支持部８６と、肉抜き部８７と、一対のフランジ部８８ａ,８８ｂと、連通部８９と、を備えている。
ここで、前記巻き線支持部８６、肉抜き部８７、一対のフランジ部８８ａ,８８ｂについては、実施例２と同一の構成であるため、説明を省略する。 As shown in FIG. 14, the bobbin 85 of the fifth embodiment includes a winding support portion 86, a lightening portion 87, a pair of flange portions 88 a and 88 b, and a communication portion 89.
Here, the winding support portion 86, the lightening portion 87, and the pair of flange portions 88a and 88b have the same configuration as that of the second embodiment, and thus description thereof is omitted.
　前記連通部８９は、ステータコア３２のバックヨーク部３５ａ（図５参照）に沿って延在された一方のフランジ部８８ａの一部を切り欠いて形成され、この一方のフランジ部８８ａを貫通し、肉抜き部８７に連通する。 The communication portion 89 is formed by cutting out a part of one flange portion 88a extending along the back yoke portion 35a (see FIG. 5) of the stator core 32, and penetrates the one flange portion 88a. It communicates with the meat removal portion 87.
　そして、この連通部８９により、モールド樹脂（ここでは不図示）を射出した際に、連通部８９を介して肉抜き部８７内へ速やかに樹脂充填を行うことができる。 And, when the molding resin (not shown here) is injected by the communication portion 89, the resin filling can be quickly performed into the lightening portion 87 via the communication portion 89.
　以上、本発明の電動機のボビン構造及びその製造方法を実施例１～実施例５に基づき説明してきたが、具体的な構成については、これらの実施例に限られるものではなく、請求の範囲の各請求項に係る発明の要旨を逸脱しない限り、設計の変更や追加等は許容される。 As described above, the bobbin structure of the electric motor and the manufacturing method thereof according to the present invention have been described based on the first to fifth embodiments. However, the specific configuration is not limited to these embodiments, and the scope of the claims is as follows. Design changes and additions are allowed without departing from the spirit of the invention according to each claim.
　実施例１では、ステータコア３２の鍔部３５ｃに沿う他方のフランジ部３６ｄのみに連通部３６ｅを形成し、一方、実施例５では、ステータコア３２のバックヨーク部３５ａに沿う一方のフランジ部８８ａのみに連通部８９を形成した例を示した。しかしながら、これに限らず、一対のフランジ部のいずれにも、肉抜き部に連通する連通部を形成してもよい。 In the first embodiment, the communication portion 36e is formed only on the other flange portion 36d along the flange portion 35c of the stator core 32. On the other hand, in the fifth embodiment, only one flange portion 88a along the back yoke portion 35a of the stator core 32 is formed. The example which formed the communication part 89 was shown. However, the present invention is not limited to this, and any of the pair of flange portions may be formed with a communication portion communicating with the lightening portion.
関連出願の相互参照Cross-reference of related applications
　本出願は、２０１３年１月２５日に日本国特許庁に出願された特願２０１３-１２２１５に基づいて優先権を主張し、その全ての開示は完全に本明細書で参照により組み込まれる。 This application claims priority based on Japanese Patent Application No. 2013-12215 filed with the Japan Patent Office on January 25, 2013, the entire disclosure of which is fully incorporated herein by reference.

Claims (7)

  1. 　ステータコアと、
    　前記ステータコアの外側を覆うと共に巻き線が巻回される巻き線支持部と、前記巻き線支持部に形成されて前記巻き線に覆われる肉抜き部と、を有する絶縁体からなるボビンと、
    　前記ステータコアと、前記ボビンと、前記巻き線を一体的に封止すると共に、前記ボビンよりも熱伝導性の高いモールド樹脂と、を備え、
    　前記モールド樹脂を、前記肉抜き部の少なくとも一部に充填し、前記ステータコアと前記巻き線とに接触させる
    　ことを特徴とする電動機のボビン構造。     A stator core;
    A bobbin made of an insulator having an outer periphery of the stator core and a winding support portion around which the winding is wound, and a lightening portion formed on the winding support portion and covered by the winding;
    The stator core, the bobbin, and the winding are integrally sealed, and includes a mold resin having higher thermal conductivity than the bobbin,
    A bobbin structure for an electric motor, wherein the mold resin is filled in at least a part of the lightening portion and brought into contact with the stator core and the winding.
  2. 　請求項１に記載された電動機のボビン構造において、
    　前記ステータコアは、角柱状のティース部を有し、
    　前記巻き線支持部を、前記ティース部の角部の外側に設ける
    　ことを特徴とする電動機のボビン構造。     In the electric motor bobbin structure according to claim 1,
    The stator core has a prismatic teeth portion,
    The bobbin structure for an electric motor, wherein the winding support portion is provided outside a corner portion of the teeth portion.
  3. 　請求項１に記載された電動機のボビン構造において、
    　前記巻き線支持部を、前記ステータコアの軸線方向に沿って設ける
    　ことを特徴とする電動機のボビン構造。     In the bobbin structure of the electric motor according to claim 1,
    The bobbin structure for an electric motor, wherein the winding support portion is provided along an axial direction of the stator core.
  4. 　請求項１に記載された電動機のボビン構造において、
    　前記巻き線支持部を、前記巻き線のコイルエンドに対応する位置に設ける
    　ことを特徴とする電動機のボビン構造。     In the bobbin structure of the electric motor according to claim 1,
    The bobbin structure for an electric motor, wherein the winding support portion is provided at a position corresponding to a coil end of the winding.
  5. 　請求項１から請求項４の何れか一項に記載された電動機のボビン構造において、
    　前記ボビンは、前記巻き線の外側を区画するパーティション部を有する
    　ことを特徴とする電動機のボビン構造。     In the bobbin structure of the electric motor according to any one of claims 1 to 4,
    The bobbin has a partition part that partitions the outside of the winding. A bobbin structure for an electric motor.
  6. 　請求項１から請求項５の何れか一項に記載された電動機のボビン構造において、
    　前記ボビンは、前記巻き線支持部の少なくとも一方の端部に形成されるフランジ部と、
    　前記フランジ部を貫通し、前記肉抜き部に連通する連通部を有する
    　ことを特徴とする電動機のボビン構造。     In the bobbin structure of the electric motor according to any one of claims 1 to 5,
    The bobbin has a flange portion formed at at least one end of the winding support portion;
    A bobbin structure for an electric motor comprising a communicating portion that penetrates the flange portion and communicates with the lightening portion.
  7. 　ステータコアと、
    　前記ステータコアの外側を覆うと共に巻き線が巻回される巻き線支持部と、前記巻き線支持部に形成されて前記巻き線に覆われる肉抜き部と、を有する絶縁体からなるボビンと、
    　前記ステータコアと、前記ボビンと、前記巻き線を一体的に封止すると共に、前記ボビンよりも熱伝導性の高いモールド樹脂と、を備えた電動機のボビン構造の製造方法において、
    　前記ステータコアの外側に前記ボビンを介して前記巻き線を巻回した後、前記巻き線の内側に向けて前記モールド樹脂を射出し、前記肉抜き部の少なくとも一部に前記モールド樹脂を充填すると共に、前記肉抜き部に充填されたモールド樹脂を前記ステータコアと前記巻き線とに接触させる
    　ことを特徴とするボビン構造の製造方法。     A stator core;
    A bobbin made of an insulator having an outer periphery of the stator core and a winding support portion around which the winding is wound, and a lightening portion formed on the winding support portion and covered by the winding;
    In the manufacturing method of the bobbin structure of the electric motor comprising the stator core, the bobbin, and the winding integrally, and a mold resin having higher thermal conductivity than the bobbin,
    After winding the winding on the outside of the stator core via the bobbin, the mold resin is injected toward the inside of the winding, and the mold resin is filled into at least a part of the lightening portion. A method of manufacturing a bobbin structure, wherein the mold resin filled in the lightening portion is brought into contact with the stator core and the winding.
PCT/JP2014/051277 2013-01-25 2014-01-22 Electric motor bobbin structure and method for manufacturing same WO2014115775A1 (en)

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