JP7217215B2 - Insulator bobbin and electric motor and equipment equipped with it - Google Patents

Insulator bobbin and electric motor and equipment equipped with it Download PDF

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JP7217215B2
JP7217215B2 JP2019188316A JP2019188316A JP7217215B2 JP 7217215 B2 JP7217215 B2 JP 7217215B2 JP 2019188316 A JP2019188316 A JP 2019188316A JP 2019188316 A JP2019188316 A JP 2019188316A JP 7217215 B2 JP7217215 B2 JP 7217215B2
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wall
electric motor
flange
insulator bobbin
tooth cover
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JP2021065027A (en
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宏 平山
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Hitachi Global Life Solutions Inc
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02T10/64—Electric machine technologies in electromobility

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Description

本発明は、インシュレータボビン並びにこれを備える電動機及び機器に関する。これらは例えば空気調和機や冷蔵庫やヒートポンプ式給湯機などの密閉型圧縮機に用いることができる。 TECHNICAL FIELD The present invention relates to an insulator bobbin, and an electric motor and equipment including the insulator bobbin. These can be used, for example, in hermetic compressors such as air conditioners, refrigerators, and heat pump water heaters.

電動機のステータコアとして、コイルとの短絡を防ぐためにインシュレータボビンを介してコイルが巻線されているものが知られている。インシュレータボビンは、例えば射出成形で成形される。 2. Description of the Related Art As a stator core for an electric motor, one is known in which a coil is wound through an insulator bobbin to prevent a short circuit with the coil. The insulator bobbin is molded, for example, by injection molding.

特許文献１のインシュレータボビンとしての絶縁体２は、絶縁体外周部に凹凸形状としての棚若しくは壁３と、溝４とを有する（００１０、図１，６）。これにより、外周部のＢ－Ｂ断面（図７）において、絶縁体２の径方向厚みは、基準となる厚み、棚若しくは壁３部分の厚み、および溝４が在る部分の厚みの３種類が存在することになる。 An insulator 2 as an insulator bobbin disclosed in Patent Document 1 has a shelf or wall 3 having an uneven shape and a groove 4 on the outer periphery of the insulator (0010, FIGS. 1 and 6). As a result, in the BB cross section (FIG. 7) of the outer peripheral portion, the radial thickness of the insulator 2 has three types: the reference thickness, the thickness of the shelf or wall 3 portion, and the thickness of the portion where the groove 4 is present. will exist.

特開２００３－９７４４０号公報JP-A-2003-97440

絶縁体２を金型射出成形等で製造する場合は、同一周方向位置における厚みが３種あったり、溝４のような凹形状部分があると、必要な型構造が複雑になるが、特許文献１はこの点について何ら配慮していない。 When manufacturing the insulator 2 by mold injection molding or the like, if there are three different thicknesses at the same circumferential position or if there is a recessed portion such as the groove 4, the required mold structure becomes complicated. Document 1 does not consider this point at all.

上記事情に鑑みてなされた本発明のインシュレータボビンは、
空間を囲む環状部分を有している無底のステータコアと、該ステータコアの環の内側に向けて延在する複数のティースと、該ティースのそれぞれに巻き回されたコイルと、ともに電動機のステータを構成し、前記ティースのそれぞれに取り付けられた絶縁性のインシュレータボビンであって、
前記インシュレータボビンは、前記ティースに接触する複数のティースカバー部と、それぞれの前記ティースカバー部を繋ぐ環状の外壁と、該外壁の外径側に配置された相壁及びフランジと、から成り、
前記ティースカバー部より外径側に前記外壁が位置し、前記ティースカバー部の内径側には、前記コイルの脱落を規制するべく前記電動機の軸方向外側に突出したつば部が位置し、
前記外壁の周方向全域について、周方向の同じ位置において、前記相壁及び前記フランジが実質的に１つ存在し、かつ、前記相壁及び前記フランジは、前記インシュレータボビンの前記外壁の展開図において、３つ又は４つ以上の仮想の直線上に離散して並んでおり、
前記つば部と前記外壁の軸方向に延在する部分と、前記つば部と前記外壁の間で径方向及び周方向に延在する前記ティースカバー部と、によって凹形状を形成していることを特徴とする。 The insulator bobbin of the present invention, which has been made in view of the above circumstances,
A bottomless stator core having an annular portion surrounding a space, a plurality of teeth extending toward the inner side of the ring of the stator core, and coils wound around each of the teeth, together forming the stator of the electric motor. an insulating insulator bobbin, comprising :
The insulator bobbin comprises a plurality of tooth cover portions that contact the teeth, an annular outer wall that connects the respective tooth cover portions, and a companion wall and a flange that are arranged on the outer diameter side of the outer wall,
The outer wall is positioned on the outer diameter side of the tooth cover portion, and the flange portion protruding outward in the axial direction of the electric motor is positioned on the inner diameter side of the tooth cover portion to prevent the coil from coming off,
There is substantially one phase wall and one flange at the same position in the circumferential direction over the entire circumferential direction of the outer wall , and the phase wall and the flange are a developed view of the outer wall of the insulator bobbin. are discretely arranged on three or four or more imaginary straight lines in
A concave shape is formed by the portion extending in the axial direction of the flange portion and the outer wall, and the tooth cover portion extending in the radial direction and the circumferential direction between the flange portion and the outer wall. Characterized by

実施形態の電動機のステータの（ａ）平面図、（ｂ）斜視図(a) A plan view and (b) a perspective view of the stator of the electric motor of the embodiment. 実施形態のインシュレータの渡り線引き回し部の示すインシュレータ斜視図FIG. 3 is an insulator perspective view showing a connecting wire routing portion of the insulator according to the embodiment; 実施形態の電動機を搭載した密閉型圧縮機の縦断面図FIG. 1 is a vertical cross-sectional view of a hermetic compressor equipped with an electric motor according to an embodiment; 密閉型圧縮機を搭載した冷蔵庫の縦断面図Longitudinal cross-sectional view of a refrigerator equipped with a hermetic compressor 図２のＡ－Ａ断面部分における射出成形時の金型構成図Die configuration diagram during injection molding in the AA cross section of Fig. 2 比較例のＡ－Ａ断面部分における射出成形時の金型構成図Mold configuration diagram at the time of injection molding in the AA cross section of the comparative example 実施形態のインシュレータボビン外壁の周方向展開図Circumferential expansion view of outer wall of insulator bobbin of embodiment 別実施形態のインシュレータボビン外壁の周方向展開図Circumferential expansion view of outer wall of insulator bobbin according to another embodiment

以下、本発明の実施形態を添付の図面を参照しつつ説明する。実施形態に係る電動機は、冷蔵庫、空気調和機、ヒートポンプ式給湯機などに搭載される密閉形圧縮機等に適用できる。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The electric motors according to the embodiments can be applied to closed compressors and the like mounted in refrigerators, air conditioners, heat pump water heaters, and the like.

図３は電動機を搭載した密閉形圧縮機の縦断面図である。図４は密閉形圧縮機を搭載した冷蔵庫の縦断面図である。 FIG. 3 is a longitudinal sectional view of a hermetic compressor equipped with an electric motor. FIG. 4 is a longitudinal sectional view of a refrigerator equipped with a hermetic compressor.

密閉形圧縮機の密閉容器５０内には、回転可能なロータ３２、及びロータ３２の外周面に対向するステータ３、を有する電動機が配されている。ロータ３２にはピストン３７に少なくとも間接的に接続したクランクシャフト３５が取り付けられている。クランクシャフト３５のように電動機の作動によって回転する物体の延在方向を軸方向とする。 An electric motor having a rotatable rotor 32 and a stator 3 facing the outer peripheral surface of the rotor 32 is arranged in a closed container 50 of the closed compressor. Attached to the rotor 32 is a crankshaft 35 which is at least indirectly connected to a piston 37 . The direction in which an object such as the crankshaft 35 that is rotated by the operation of the electric motor extends is defined as the axial direction.

図１は電動機のステータ３とインシュレータボビン６の（ａ）平面図、（ｂ）斜視図である。本実施例では１０極１２スロットを例示しているが極数やスロット数は特に限られない。 FIG. 1 shows (a) a plan view and (b) a perspective view of a stator 3 and an insulator bobbin 6 of an electric motor. Although 10 poles and 12 slots are exemplified in this embodiment, the number of poles and the number of slots are not particularly limited.

ステータ３は、空間を囲む環状部分を有して無底のステータコア４と、ステータコア４の環の内側に向けて延在する複数のティース４１と、ティース４１の少なくとも上下（図１（ａ）中、紙面垂直方向。）それぞれに取付けられた絶縁性のインシュレータボビン６と、少なくとも部分的にインシュレータボビン６を挟んで、ティース４１それぞれに巻き回されたコイル５と、を有する。コイル５は少なくとも互いに別体の３つの巻線を含んでおり、互いに位相の異なる電流（Ｕ相、Ｖ相、Ｗ相）が流れる。このため、互いが接触すると短絡する虞があるため、それぞれが離間するように構成されている。 The stator 3 includes a bottomless stator core 4 having an annular portion surrounding a space, a plurality of teeth 41 extending toward the inner side of the ring of the stator core 4, and at least upper and lower teeth 41 (see FIG. 1A). , the direction perpendicular to the plane of the paper.), and a coil 5 wound around each of the teeth 41 with the insulator bobbin 6 at least partially interposed therebetween. The coil 5 includes at least three separate windings, through which currents having different phases (U-phase, V-phase, and W-phase) flow. For this reason, if they come into contact with each other, there is a risk of short-circuiting, so they are configured to be separated from each other.

図２は実施形態のインシュレータボビン６の斜視図である。インシュレータボビン６は、ティース４１に接触する複数のティースカバー部６１と、それぞれのティースカバー部６１を繋ぐ環状の外壁９と、外壁９の外径側に配された凸形状部としての相壁１１及びフランジ１２とを有する。コイル５は、外壁９の外径側の面としての渡り領域１０を周方向に向かってその一部（渡り線８Ｕ，８Ｖ，８Ｗ）が延在している。ティースカバー部６１より外径側に外壁９は位置しており、ティースカバー部６１の内径側には、コイル５の脱落を規制するべく電動機の軸方向外側に突出したつば部１６が位置している。 FIG. 2 is a perspective view of the insulator bobbin 6 of the embodiment. The insulator bobbin 6 includes a plurality of tooth cover portions 61 that contact the teeth 41, an annular outer wall 9 that connects the respective tooth cover portions 61, and a phase wall 11 as a convex portion arranged on the outer diameter side of the outer wall 9. and a flange 12 . A portion of the coil 5 (connection wires 8U, 8V, 8W) extends in the circumferential direction through a transition region 10 as a surface on the outer diameter side of the outer wall 9 . The outer wall 9 is located on the outer diameter side of the tooth cover portion 61, and the collar portion 16 projecting outward in the axial direction of the electric motor is located on the inner diameter side of the tooth cover portion 61 to prevent the coil 5 from coming off. there is

（コイル５の渡り）
図７は本実施形態の外壁９を延在する渡り線８を描いたインシュレータボビン６の外壁９の展開図である。図８は別実施形態の外壁９を延在する渡り線８を描いたインシュレータボビン６の外壁９の展開図である。
インシュレータボビン６は、例えば樹脂製であり、型成形される。この場合、後述するように、凹状の部分を含むインシュレータボビン６の外壁９に容易に配することができる凸形状部（相壁１１やフランジ１２）は、周方向の同じ位置において、１以内である。すなわち、周方向において同じ位置では、相壁１１及びフランジ１２のような凸形状部分は、０または１つが存在している。各コイル５の絶縁を好ましく行うには、図７，８に示すように、周方向に亘って略全部の位置に１つの凸形状部分が存在している。全周が外壁９に囲まれた部分を相壁１１と呼び、一部が外壁９の側面視の端にある部分をフランジ１２と呼ぶ。 (Transition of coil 5)
FIG. 7 is a developed view of the outer wall 9 of the insulator bobbin 6 depicting the connecting wire 8 extending through the outer wall 9 of this embodiment. FIG. 8 is a developed view of the outer wall 9 of the insulator bobbin 6 depicting a connecting wire 8 extending through the outer wall 9 of another embodiment.
The insulator bobbin 6 is made of resin, for example, and molded. In this case, as will be described later, the number of convex portions (compartment wall 11 and flange 12) that can be easily arranged on the outer wall 9 of the insulator bobbin 6 including the concave portion is within 1 at the same position in the circumferential direction. be. That is, at the same position in the circumferential direction, 0 or 1 convex portion such as the phase wall 11 and the flange 12 is present. In order to preferably insulate each coil 5, as shown in FIGS. 7 and 8, one protruded portion is present at substantially all positions along the circumferential direction. A portion whose entire circumference is surrounded by the outer wall 9 is called a phase wall 11 , and a portion partially located at the end of the outer wall 9 in a side view is called a flange 12 .

そして、各凸形状部１１，１２は概ね、図７，８のような展開図において、３つ又は４つ以上の仮想の直線上それぞれに離散して並んでいる。これにより本実施形態のように、渡り線８が３種類の場合に、それぞれの渡り線８の接触を防止しやすい構造を形成できる。同様にして、渡り線８がＮ種類の場合は、仮想の直線の本数をＮ以上又は（Ｎ＋１）以上にするとよい。 7 and 8, the convex portions 11 and 12 are arranged discretely on three or four or more imaginary straight lines. As a result, when there are three types of connecting wires 8 as in the present embodiment, a structure can be formed in which contact between the connecting wires 8 can be easily prevented. Similarly, if there are N types of crossover wires 8, the number of imaginary straight lines should be N or more, or (N+1) or more.

（金型容易化構造）
図５は図２のＡ－Ａ断面部分（つば部１６、ティースカバー部６１、外壁９）における射出成形時の金型構成図である。相壁１１とフランジ部１２は、周方向（渡り方向）について互いに実質的に重ならない構造としているため、図５のように径方向でとった断面視では、凸形状部分は実質的に０又は１つが看取できる。 (Mold-simplification structure)
FIG. 5 is a mold configuration diagram for injection molding of the AA section (collar portion 16, tooth cover portion 61, outer wall 9) of FIG. The phase wall 11 and the flange portion 12 have a structure in which they do not substantially overlap each other in the circumferential direction (transition direction). One can be observed.

実施形態のインシュレータボビン６は、つば部１６及び外壁９のように２つの軸方向に延在する部分と、これらの間で径方向や周方向に延在するティースカバー部６１のような部分とによって凹形状を形成している。このため射出成型する場合の金型としては、軸方向を抜き方向とした金型１３，１４が用意される。そして、凸形状部１１，１２は、軸方向に実質的に１つ以内であるから、金型１３，１４の当接面に、凸形状部に対応する空隙が生ずるようにしておけば、これら金型１３，１４によって成形できる。 The insulator bobbin 6 of the embodiment has two axially extending portions such as the flange portion 16 and the outer wall 9, and a portion such as the tooth cover portion 61 extending radially and circumferentially between them. form a concave shape. For this reason, molds 13 and 14 having an axial direction as a drawing direction are prepared as molds for injection molding. Further, since the number of convex portions 11 and 12 is substantially within one in the axial direction, if a gap corresponding to the convex portions is generated on the contact surfaces of the molds 13 and 14, these It can be molded by molds 13 and 14 .

一方、比較例として図６を示す。図６は、軸方向に実質的に２つの凸形状部１１，１２が存在するようなインシュレータボビン６’を形成する際の金型構造を示す図である。本形状を成形する場合、軸方向の金型１３’，１４’のみでは成形できず、別途、半径方向外径側に向かってスライドするスライドコア１５’を備えたアンダーカットの金型構造とする必要がある。 On the other hand, FIG. 6 is shown as a comparative example. FIG. 6 is a diagram showing a mold structure for forming an insulator bobbin 6' having substantially two convex portions 11 and 12 in the axial direction. When molding this shape, it is not possible to mold with only the axial molds 13' and 14', and an undercut mold structure having a separate slide core 15' that slides toward the radially outer diameter side is used. There is a need.

３ ステータ
４ ステータコア
５ コイル
６ インシュレータボビン
８（８ｕ、８ｖ、８ｗ） 渡り線
９ 外壁
１０ 渡り領域
１１ 相壁（凸形状部）
１２ フランジ部（凸形状部）
１３、１４ 金型
１６ つば部
３２ ロータ
５０ 密閉型圧縮機
１００ 冷蔵庫 3 Stator 4 Stator Core 5 Coil 6 Insulator Bobbin 8 (8u, 8v, 8w) Crossover Wire 9 Outer Wall 10 Crossover Area 11 Phase Wall (Convex Shaped Part)
12 flange portion (convex portion)
Reference Signs List 13, 14 Mold 16 Collar 32 Rotor 50 Hermetic Compressor 100 Refrigerator

Claims (3)

空間を囲む環状部分を有している無底のステータコアと、該ステータコアの環の内側に向けて延在する複数のティースと、該ティースのそれぞれに巻き回されたコイルと、ともに電動機のステータを構成し、前記ティースのそれぞれに取り付けられた絶縁性のインシュレータボビンであって、
前記インシュレータボビンは、前記ティースに接触する複数のティースカバー部と、それぞれの前記ティースカバー部を繋ぐ環状の外壁と、該外壁の外径側に配置された相壁及びフランジと、から成り、
前記ティースカバー部より外径側に前記外壁が位置し、前記ティースカバー部の内径側には、前記コイルの脱落を規制するべく前記電動機の軸方向外側に突出したつば部が位置し、
前記外壁の周方向全域について、周方向の同じ位置において、前記相壁及び前記フランジが実質的に１つ存在し、かつ、前記相壁及び前記フランジは、前記インシュレータボビンの前記外壁の展開図において、３つ又は４つ以上の仮想の直線上に離散して並んでおり、
前記つば部と前記外壁の軸方向に延在する部分と、前記つば部と前記外壁の間で径方向及び周方向に延在する前記ティースカバー部と、によって凹形状を形成していることを特徴とするインシュレータボビン。 A bottomless stator core having an annular portion surrounding a space, a plurality of teeth extending toward the inner side of the ring of the stator core, and coils wound around each of the teeth, together forming the stator of the electric motor. an insulating insulator bobbin, comprising :
The insulator bobbin comprises a plurality of tooth cover portions that contact the teeth, an annular outer wall that connects the respective tooth cover portions, and a companion wall and a flange that are arranged on the outer diameter side of the outer wall,
The outer wall is positioned on the outer diameter side of the tooth cover portion, and the flange portion protruding outward in the axial direction of the electric motor is positioned on the inner diameter side of the tooth cover portion to prevent the coil from coming off,
There is substantially one phase wall and one flange at the same position in the circumferential direction over the entire circumferential direction of the outer wall , and the phase wall and the flange are a developed view of the outer wall of the insulator bobbin. are discretely arranged on three or four or more imaginary straight lines in
A concave shape is formed by the portion extending in the axial direction of the flange portion and the outer wall, and the tooth cover portion extending in the radial direction and the circumferential direction between the flange portion and the outer wall. Characterized insulator bobbin. 請求項１に記載のインシュレータボビンを備えていることを特徴とする電動機。 An electric motor comprising the insulator bobbin according to claim 1 . 請求項２に記載の電動機を備えていることを特徴とする機器。 A device comprising the electric motor according to claim 2 .
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Publication number Priority date Publication date Assignee Title
JP2001218394A (en) 2000-01-31 2001-08-10 Sanyo Electric Co Ltd Stator of motor
JP2009055741A (en) 2007-08-28 2009-03-12 Jtekt Corp Electric motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001218394A (en) 2000-01-31 2001-08-10 Sanyo Electric Co Ltd Stator of motor
JP2009055741A (en) 2007-08-28 2009-03-12 Jtekt Corp Electric motor

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