JP3282680B2 - Manufacturing method of small mold motor - Google Patents
Manufacturing method of small mold motorInfo
- Publication number
- JP3282680B2 JP3282680B2 JP21547992A JP21547992A JP3282680B2 JP 3282680 B2 JP3282680 B2 JP 3282680B2 JP 21547992 A JP21547992 A JP 21547992A JP 21547992 A JP21547992 A JP 21547992A JP 3282680 B2 JP3282680 B2 JP 3282680B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- peripheral surface
- stator
- stator core
- resin layer
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Landscapes
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、小形モールドモータの
製造方法に関し、特にステータの外被の形成方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a small-sized molded motor, and more particularly to a method of forming a stator jacket.
【０００２】[0002]
【従来の技術】従来、小形モータのステータは一般に積
層鉄心から構成されているが、ステータコアの内部の磁
束はほぼ飽和状態になるように設計されているため、積
層鉄心相互の固定のためのカシメ穴や、外部への取り付
けのための通し穴などは、円形状のステータコアの外径
周上外に突出する部分に設けて、内部の磁束に影響を与
えないようにしている（例えば、実開平２−１０７２３
７号）。このような、積層鉄心からなるステータコアの
外周からの水の侵入を防ぎ、かつステータの絶縁のため
に、図２に示すように、ステータコア１のリング状のヨ
ーク部１１の外周およびヨーク部１１の外径周上外に突
出した突出部１２に設けた通し穴２の内面を樹脂モール
ドにより樹脂層３で覆うとともに、ヨーク部１１の内側
に突出する複数個の突極１３に巻回したステータコイル
４の周囲を覆うようにしている（例えば、特開昭６３−
１４８８４４号）。2. Description of the Related Art Conventionally, the stator of a small motor is generally composed of a laminated iron core. However, since the magnetic flux inside the stator core is designed to be substantially saturated, a caulking for fixing the laminated iron cores to each other is performed. Holes and through holes for attachment to the outside are provided at portions protruding outside the circumference of the outer diameter of the circular stator core so as not to affect the internal magnetic flux (for example, actual open flat). 2-10723
No. 7). As shown in FIG. 2, in order to prevent water from entering from the outer periphery of the stator core made of the laminated iron core and to insulate the stator, as shown in FIG. A stator coil wound around a plurality of salient poles 13 projecting inward from the yoke portion 11 while covering the inner surface of the through hole 2 provided in the projecting portion 12 projecting outward on the outer diameter circumference with a resin layer 3 by resin molding. 4 (see, for example,
148844).
【０００３】[0003]
【発明が解決しようとする課題】ステータ１の外周およ
び通し穴２の内面を樹脂層３で覆う時、図３に示すよう
に、通し穴２の内面の樹脂層３の厚さを維持するための
中子ピン５を通し穴２の中に入れてモールドする。とこ
ろが小形モータの場合、ステータ１の大きさに余裕がな
いため、大きな通し穴２を開けることはできない。した
がって、上記構成では、中子ピン５と通し穴２の内面と
の間は樹脂層の厚さと同じだけの薄い隙間にステータ１
の軸方向端面から樹脂を入れることになるが、薄い隙間
には樹脂が十分流れ込むことができず、通し穴２の内面
の樹脂層に欠陥が生じ、通し穴２の内面からステータ１
の内部に水が侵入するという恐れがあった。本発明は、
通し穴の内面の樹脂層の欠陥が生じるのを防ぎ、防水効
果を高めた小形モールドモータを提供することを目的と
するものである。When the outer periphery of the stator 1 and the inner surface of the through hole 2 are covered with the resin layer 3, as shown in FIG. 3, the thickness of the resin layer 3 on the inner surface of the through hole 2 is maintained. The core pin 5 is put into the through hole 2 and molded. However, in the case of a small motor, there is no room for the size of the stator 1, so that a large through hole 2 cannot be formed. Therefore, in the above configuration, the stator 1 has a gap between the core pin 5 and the inner surface of the through hole 2 as thin as the thickness of the resin layer.
However, the resin cannot be sufficiently introduced into the thin gap, a defect occurs in the resin layer on the inner surface of the through hole 2, and the stator 1 is removed from the inner surface of the through hole 2.
There was a risk that water would enter the interior of the house. The present invention
It is an object of the present invention to provide a small-sized molded motor in which a defect of a resin layer on an inner surface of a through hole is prevented and a waterproof effect is enhanced.
【０００４】[0004]
【課題を解決するための手段】本発明は、外周面に突出
部を設けた積層鋼板からなるステータコアと、前記突出
部に軸方向に貫通する通し穴と、前記ステータコアの突
極に巻回したステータコイルとを備え、前記ステータコ
アおよびステータコイルの外周面に樹脂層からなる外被
をモールド成形する小形モールドモータの製造方法にお
いて、前記通し穴から前記突出部の外周面に開口する切
り欠き溝を設け、前記切欠き溝から樹脂を前記通し穴に
注入させることにより、前記ステータコアおよびステー
タコイルの外被と共に前記通し穴の内周面に樹脂層を形
成するようにしたものである。According to the present invention, there is provided a stator core comprising a laminated steel sheet having a projection on an outer peripheral surface, a through hole penetrating the projection in an axial direction, and a stator core wound around salient poles. A method for manufacturing a small-sized molded motor, comprising: a stator coil; and a molding made of a resin layer on an outer peripheral surface of the stator core and the stator coil, wherein a notch groove opening from the through hole to an outer peripheral surface of the protruding portion is provided. The resin layer is formed on the inner peripheral surface of the through hole together with the jacket of the stator core and the stator coil by injecting the resin into the through hole from the notch groove.
【０００５】[0005]
【作用】ステータコアの外周に開口する切欠き溝を通し
穴に設けてあるので、ステータコアの外周面を被覆する
樹脂はステータコアの軸方向端面からばかりでなく、切
欠き溝を通って通し穴の軸方向の全長にわたって外周側
面から通し穴の内周面に流れ込むので、樹脂は流れやす
く、通し穴の内周面と中子ピンとの間の狭い隙間にも確
実に流れ込み、通し穴の内周面の樹脂層に欠陥が生じる
ことはなくなる。Since the cutout groove opened in the outer periphery of the stator core is provided in the through hole, the resin coating the outer peripheral surface of the stator core is not only from the axial end face of the stator core, but also through the cutout groove. The resin flows easily from the outer peripheral side to the inner peripheral surface of the through hole over the entire length in the direction, so that the resin easily flows into the narrow gap between the inner peripheral surface of the through hole and the core pin, and the inner peripheral surface of the through hole No defect occurs in the resin layer.
【０００６】[0006]
【実施例】本発明を図に示す実施例について説明する。
図１は本発明の実施例を示す正断面図で、薄板鋼板を積
層して形成したステータコア１のリング状のヨーク部１
１には外径周上外に突出した突出部１２を設けてある。
突出部１２には通し穴２を設け、通し穴２から突出部１
２の外周面に開口する切り欠き溝２１を設けてある。ヨ
ーク部１１の内側には複数個の突極１３を設け、突極１
３にはステータコイル４を巻回してある。ステータコア
１およびステータコイル４の外周面に樹脂層からなる外
被を形成する場合、通し穴２の中に通し穴２の径より小
さい径の中子ピン５を挿入した状態で、図示しない成形
型の中にステータコア１とステータコイル４を装着し、
樹脂を注入する。樹脂層３はステータコア１の外周面に
沿って流れると共に、引き続いて、切欠き溝２１を通っ
て通し穴２の内周面に流れ込む。なお、樹脂が硬化した
後にステータコア１を成形型から取り出し、中子ピン５
を通し穴２から取り外す。樹脂はステータコア１の軸方
向端面からばかりでなく、切欠き溝２１を通って中子ピ
ン５の軸方向の全長にわたって外周側面から通し穴２に
流れ込むので、樹脂は流れやすく、通し穴２の内周面と
中子ピン５との間の狭い隙間にも確実に流れ込み、通し
穴２の内周面の樹脂層３に欠陥が生じることはなくな
る。また、切欠き溝２１の開口部の幅を通し穴２の内周
面と中子ピン５との間の隙間より大きくしておけば、切
欠き溝２１から通し穴２の内周面に十分に樹脂が流れる
と共に、樹脂を射出成形する時の射出圧力を低く抑え、
かつ樹脂の流入速度を高めることができる。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 is a front sectional view showing an embodiment of the present invention, in which a ring-shaped yoke portion 1 of a stator core 1 formed by laminating thin steel plates.
1 is provided with a protruding portion 12 protruding outward on the outer diameter circumference.
The projecting portion 12 is provided with a through hole 2, and the projecting portion 1
2 is provided with a notched groove 21 which is open on the outer peripheral surface. A plurality of salient poles 13 are provided inside the yoke part 11,
A stator coil 4 is wound around 3. When forming a jacket made of a resin layer on the outer peripheral surfaces of the stator core 1 and the stator coil 4, a molding die (not shown) is inserted into the through hole 2 with the core pin 5 having a diameter smaller than the diameter of the through hole 2 inserted. The stator core 1 and the stator coil 4 are mounted in
Inject resin. The resin layer 3 flows along the outer peripheral surface of the stator core 1 and subsequently flows into the inner peripheral surface of the through hole 2 through the notch groove 21. After the resin is cured, the stator core 1 is taken out of the mold, and the core pin 5
From the through hole 2. The resin flows into the through hole 2 not only from the axial end face of the stator core 1 but also through the notch groove 21 over the entire length of the core pin 5 in the axial direction, so that the resin flows easily. It surely flows into the narrow gap between the peripheral surface and the core pin 5, and the resin layer 3 on the inner peripheral surface of the through hole 2 does not have any defect. If the width of the opening of the notch groove 21 is made larger than the gap between the inner peripheral surface of the through hole 2 and the core pin 5, the inner peripheral surface of the through hole 2 can be sufficiently extended from the notch groove 21. As the resin flows, the injection pressure during injection molding of the resin is kept low,
In addition, the inflow speed of the resin can be increased.
【０００７】[0007]
【発明の効果】以上述べたように、本発明によれば、ス
テータコアおよびステータコイルの外周面に樹脂層をモ
ールドで形成する時、通し穴の内周面に欠陥のない樹脂
層を確実に形成することができるので、通し穴の内面か
らの浸水を防いだ防水効果の高い、品質の安定した小形
モールドモータを提供ができる効果がある。As described above, according to the present invention, when a resin layer is formed on the outer peripheral surfaces of the stator core and the stator coil by molding, a resin layer having no defect is reliably formed on the inner peripheral surface of the through hole. Therefore, there is an effect that it is possible to provide a small-sized molded motor having a high waterproofing effect and a stable quality which prevents infiltration from the inner surface of the through hole.
【図１】本発明の実施例を示す正断面図である。FIG. 1 is a front sectional view showing an embodiment of the present invention.
【図２】従来例を示す正断面図である。FIG. 2 is a front sectional view showing a conventional example.
【図３】通し穴の状態を示す要部断面図である。FIG. 3 is a sectional view of a main part showing a state of a through hole.
１ ステータコア １１ ヨーク部 １２ 突出部 １３ 突極 ２ 通し穴 ２１ 切欠き溝 ３ 樹脂層 ４ ステータコイル ５ 中子ピン DESCRIPTION OF SYMBOLS 1 Stator core 11 Yoke part 12 Projection part 13 Salient pole 2 Through hole 21 Notch groove 3 Resin layer 4 Stator coil 5 Core pin
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 15/12 H02K 5/08 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) H02K 15/12 H02K 5/08
Claims (1)
るステータコアと、前記突出部に設けた軸方向に貫通す
る通し穴と、前記ステータコアの突極に巻回したステー
タコイルとを備え、前記ステータコアおよびステータコ
イルの外周面に樹脂層からなる外被をモールド成形する
小形モールドモータの製造方法において、前記突出部に、 前記通し穴から前記突出部の外周面に開
口する切欠き溝を設け、前記切欠き溝から樹脂を前記通
し穴に注入させることにより、前記ステータコアおよび
ステータコイルの外被と共に前記通し穴の内周面に樹脂
層を形成することを特徴とする小形モールドモータの製
造方法。1. A stator core comprising a laminated steel sheet having a protruding portion provided on an outer peripheral surface, a through hole provided in the protruding portion, penetrating in an axial direction, and a stator coil wound around salient poles of the stator core, in the stator core and a manufacturing method of small molded motor molding a jacket made of a resin layer on the outer peripheral surface of the stator coil, the protruding portion, provided notched groove open to the outer peripheral surface of the projecting portion from the through hole A resin layer is formed on an inner peripheral surface of the through hole together with a jacket of the stator core and the stator coil by injecting a resin into the through hole from the notch groove. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21547992A JP3282680B2 (en) | 1992-07-20 | 1992-07-20 | Manufacturing method of small mold motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21547992A JP3282680B2 (en) | 1992-07-20 | 1992-07-20 | Manufacturing method of small mold motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0638465A JPH0638465A (en) | 1994-02-10 |
| JP3282680B2 true JP3282680B2 (en) | 2002-05-20 |
Family
ID=16673065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21547992A Expired - Lifetime JP3282680B2 (en) | 1992-07-20 | 1992-07-20 | Manufacturing method of small mold motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3282680B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3563650B2 (en) | 1999-10-25 | 2004-09-08 | 株式会社日立産機システム | Rotating electric machine |
-
1992
- 1992-07-20 JP JP21547992A patent/JP3282680B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0638465A (en) | 1994-02-10 |
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