JP2019047651A - Armature, motor, and method of manufacturing armature - Google Patents
Armature, motor, and method of manufacturing armature Download PDFInfo
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- JP2019047651A JP2019047651A JP2017169442A JP2017169442A JP2019047651A JP 2019047651 A JP2019047651 A JP 2019047651A JP 2017169442 A JP2017169442 A JP 2017169442A JP 2017169442 A JP2017169442 A JP 2017169442A JP 2019047651 A JP2019047651 A JP 2019047651A
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- Prior art keywords
- protective cover
- armature
- winding
- mold resin
- core
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- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 229920005989 resin Polymers 0.000 claims abstract description 74
- 239000011347 resin Substances 0.000 claims abstract description 74
- 238000004804 winding Methods 0.000 claims abstract description 53
- 210000000078 claw Anatomy 0.000 claims abstract description 37
- 230000001681 protective effect Effects 0.000 claims description 105
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/04—Connections between commutator segments and windings
-
- 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
- H02K3/00—Details of windings
- H02K3/44—Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
-
- 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
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
- H02K3/51—Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Current Collectors (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
本発明は、電機子、モータ及び電機子の製造方法に関する。 The present invention relates to an armature, a motor, and a method of manufacturing the armature.
従来、整流子とコアとの間の巻線部分をモールド樹脂で被覆する電機子が知られている（例えば、特許文献１参照）。このような構成とすることで、巻線部分の露出が抑えられて巻線の断線が抑えられるようになっている。 Conventionally, an armature is known in which a winding portion between a commutator and a core is covered with a mold resin (see, for example, Patent Document 1). With such a configuration, the exposure of the winding portion is suppressed, and disconnection of the winding can be suppressed.
ところで、上記のような電機子では、巻線を整流子の爪部と接続することとなるが、その接続部位において断線する虞がある。
本発明は、上記課題を解決するためになされたものであって、その目的は、巻線の断線を抑える電機子、モータ及び電機子の製造方法を提供することにある。
By the way, in the armature as described above, although the winding is connected to the claw portion of the commutator, there is a possibility that the connection portion is disconnected.
The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide an armature, a motor and a method of manufacturing the armature, which suppress breakage of a winding.
上記課題を解決する電機子は、回転軸と、該回転軸に固定されるコアと、該コアに巻回される巻線と、前記巻線が接続される爪部を有して前記回転軸に固定される整流子と、を備えた電機子であって、少なくとも前記爪部と前記巻線との接続部分を覆うモールド樹脂が設けられる。 An armature for solving the above problems has a rotating shaft, a core fixed to the rotating shaft, a winding wound around the core, and a claw portion to which the winding is connected, the rotating shaft An armature provided with a commutator fixed thereto, and a mold resin covering at least a connecting portion between the claw portion and the winding is provided.
この構成によれば、最も断線の可能性の高い整流子の爪部と巻線との接続部位をモールド樹脂で覆うことで確実な巻線保護が可能となり、巻線の断線を抑えることができる。
上記電機子において、前記モールド樹脂の外側を覆う保護カバー部が設けられることが好ましい。
According to this configuration, by covering the connecting portion between the claws of the commutator and the winding with the highest possibility of disconnection with the molding resin, reliable winding protection can be achieved, and the disconnection of the winding can be suppressed. .
Preferably, in the armature, a protective cover that covers the outside of the mold resin is provided.
この構成によれば、モールド樹脂の外側を覆う保護カバー部が設けられることで、例えばモールド樹脂に作用する応力によってモールド樹脂が割れた場合であってもモールド樹脂が飛散することが抑えられる。 According to this configuration, by providing the protective cover that covers the outside of the mold resin, it is possible to suppress the mold resin from being scattered even if the mold resin is broken due to stress acting on the mold resin, for example.
上記電機子において、前記保護カバー部は、熱収縮チューブであることが好ましい。
この構成によれば、保護カバー部が熱収縮チューブであるため、モールド樹脂に対して密着させるように取り付けることを容易にできる。
In the armature, preferably, the protective cover portion is a heat-shrinkable tube.
According to this configuration, since the protective cover is a heat-shrinkable tube, it can be easily attached so as to be in close contact with the mold resin.
上記電機子において、前記モールド樹脂は、前記整流子と前記コア端面との間にくびれ部を有し、前記保護カバー部は、前記爪部並びに該爪部寄りの前記巻線に対応する位置の前記モールド樹脂を覆う第１保護カバーと、前記コア寄りの前記巻線に対応する位置の前記モールド樹脂を覆う第２保護カバーとを備えることが好ましい。 In the armature, the mold resin has a constriction portion between the commutator and the core end face, and the protective cover portion has a position corresponding to the claw portion and the winding close to the claw portion. It is preferable to provide the 1st protective cover which covers the mold resin, and the 2nd protective cover which covers the mold resin of the position corresponding to the winding by the side of the core.
この構成によれば、第１保護カバーと第２保護カバーとの２部品を備える構成とすることで、それぞれの位置を確実に覆ってモールド樹脂が外部に露出することが抑えられる。
上記電機子において、前記第１保護カバーと前記第２保護カバーとは一部が重なるように設けられることが好ましい。
According to this configuration, by providing two components of the first protective cover and the second protective cover, it is possible to reliably cover the respective positions and to suppress the exposure of the mold resin to the outside.
In the armature, preferably, the first protective cover and the second protective cover are provided so as to partially overlap with each other.
この構成によれば、第１保護カバーと第２保護カバーとは一部が重なるように設けられるため、各保護カバー間での隙間をなくすことができる。
上記電機子において、前記くびれ部の外径は、前記整流子の外径よりも小径であることが好ましい。
According to this configuration, since the first protective cover and the second protective cover are provided so as to partially overlap with each other, it is possible to eliminate the gap between the respective protective covers.
In the armature, it is preferable that the outer diameter of the narrowed portion be smaller than the outer diameter of the commutator.
この構成によれば、くびれ部の外径を整流子の外径よりも小径とすることで、モールド樹脂の量を抑えてモールド樹脂の界面で発生する応力集中を抑えることができる。
上記電機子において、前記くびれ部に対応する部位に前記保護カバー部を取り付けた状態の外径は、前記整流子の外径よりも小径であることが好ましい。
According to this configuration, by setting the outer diameter of the narrowed portion to be smaller than the outer diameter of the commutator, it is possible to suppress the amount of mold resin and to suppress the stress concentration generated at the interface of the mold resin.
In the armature, preferably, an outer diameter of the state where the protective cover portion is attached to a portion corresponding to the narrow portion is smaller than an outer diameter of the commutator.
この構成によれば、くびれ部に対応する部位に前記保護カバー部を取り付けた状態の外径は、前記整流子の外径よりも小径とすることで、モールド樹脂の量を抑えてモールド樹脂の界面で発生する応力集中を抑えることができる。 According to this configuration, by setting the outer diameter of the state in which the protective cover portion is attached to the portion corresponding to the constricted portion smaller than the outer diameter of the commutator, the amount of mold resin is suppressed to reduce the amount of mold resin. Stress concentration occurring at the interface can be suppressed.
また、上記課題を解決するモータは、上記いずれかに記載の電機子を備える。
この構成によれば、上記いずれかに記載の効果を奏するモータを提供できる。
また、上記課題を解決する電機子の製造方法は、回転軸と、該回転軸に固定されるコアと、該コアに巻回される巻線と、前記巻線が接続される爪部を有して前記回転軸に固定される整流子と、を備えた電機子の製造方法であって、少なくとも前記爪部と前記巻線との接続部分を樹脂によってモールドする。
In addition, a motor that solves the above problem includes the armature described in any of the above.
According to this configuration, it is possible to provide a motor having the effects described in any of the above.
Further, a method of manufacturing an armature for solving the above problems has a rotating shaft, a core fixed to the rotating shaft, a winding wound around the core, and a claw portion to which the winding is connected. And a commutator fixed to the rotating shaft, wherein at least a connecting portion between the claw portion and the winding is molded with a resin.
この構成によれば、最も断線の可能性の高い整流子の爪部と巻線との接続部位を樹脂でモールドすることで確実な巻線保護が可能となり、巻線の断線を抑えることができる。
上記電機子の製造方法において、熱収縮チューブでなる第１保護カバーを前記爪部並びに該爪部寄りの前記巻線に対応する位置に配置した状態で加熱する第１加熱工程と、前記第１加熱工程後に熱収縮チューブでなる第２保護カバーを前記コア寄りの前記巻線に対応する位置に配置した状態で加熱する第２加熱工程と、を備えることが好ましい。
According to this configuration, by molding the connecting portion between the claw of the commutator and the winding, which has the highest possibility of disconnection, with a resin, reliable winding protection can be achieved, and disconnection of the winding can be suppressed. .
In the method of manufacturing the armature, a first heating step of heating in a state in which a first protective cover made of a heat-shrinkable tube is disposed at a position corresponding to the claw portion and the winding close to the claw portion; It is preferable to provide a second heating step of heating in a state in which a second protective cover made of a heat-shrinkable tube is disposed at a position corresponding to the winding near the core after the heating step.
この構成によれば、第１保護カバーと第２保護カバーとによってそれぞれの位置を確実に覆ってモールド樹脂が外部に露出することが抑えられる。 According to this configuration, the first protective cover and the second protective cover reliably cover the respective positions to suppress the exposure of the mold resin to the outside.
本発明の電機子、モータ及び電機子の製造方法によれば、巻線の断線が抑えられる。 According to the armature, motor and armature manufacturing method of the present invention, disconnection of the winding can be suppressed.
（第１実施形態）
以下、モータの第１実施形態について説明する。
本実施形態のモータ１０は、例えばターボ過給機のウェイストゲートバルブを開閉する電動アクチュエータの駆動源として用いられるものである。
First Embodiment
Hereinafter, a first embodiment of the motor will be described.
The motor 10 of this embodiment is used, for example, as a drive source of an electric actuator that opens and closes a waste gate valve of a turbocharger.
図１に示すように、モータ１０は、略有底筒状のヨークハウジング（以下、単にヨークという）１１と、該ヨーク１１の開口部を閉塞するエンドプレート１２とを有する。
ヨーク１１の内周面には、一対のマグネット１３が互いに対向するように固着されるとともに、マグネット１３の内側には電機子１４が配置されている。
As shown in FIG. 1, the motor 10 has a substantially bottomed cylindrical yoke housing (hereinafter simply referred to as a yoke) 11 and an end plate 12 closing the opening of the yoke 11.
A pair of magnets 13 is fixed to the inner circumferential surface of the yoke 11 so as to face each other, and an armature 14 is disposed inside the magnet 13.
図１に示すように、電機子１４は、ヨーク１１の中央部に配置される回転軸１５を備えている。回転軸１５は、その基端側（図１においてヨーク１１の底部側）がヨーク１１の底部中央に設けられた軸受１６にて軸支され、先端側がエンドプレート１２の中央に設けられた軸受１７にて軸支されている。また、回転軸１５には、コア１８と整流子１９と軸方向に並ぶように固定されている。 As shown in FIG. 1, the armature 14 has a rotating shaft 15 disposed at the center of the yoke 11. The rotary shaft 15 is supported at its base end side (the bottom side of the yoke 11 in FIG. 1) by a bearing 16 provided at the center of the bottom of the yoke 11 and a front end side is provided at the center of the end plate 12. Supported by Further, it is fixed to the rotating shaft 15 so as to be axially aligned with the core 18 and the commutator 19.
コア１８には各スロットに巻線２０が巻回されている。巻線２０は、その一部の接続線２０ａが整流子１９の爪部１９ａに結線（接続）されている。
また、エンドプレート１２には整流子１９と摺接するブラシ２１を保持するブラシ保持部１２ａが設けられている。そして図示しない外部電源からブラシ２１を介して整流子１９並びに巻線２０に供給されると、電機子１４（回転軸１５）が回転駆動されるようになっている。
Windings 20 are wound in each slot in the core 18. A part of the connection wire 20 a of the winding 20 is connected (connected) to the claw portion 19 a of the commutator 19.
Further, the end plate 12 is provided with a brush holding portion 12 a for holding the brush 21 in sliding contact with the commutator 19. When supplied from an external power supply (not shown) to the commutator 19 and the winding 20 via the brush 21, the armature 14 (rotation shaft 15) is rotationally driven.
また、本実施形態の電機子１４は、整流子１９とコア１８の整流子１９側の端面１８ａとの間にモールド樹脂２２が設けられる。モールド樹脂２２は、整流子１９の爪部１９ａ並びに爪部１９ａに接続される巻線２０の接続線２０ａを覆うようになっている。なお、モールド樹脂２２は、コア１８の端面１８ａまでは延びておらず、すなわちコア１８を覆わないようになっている。また、モールド樹脂２２は、巻線２０の一部が引き出された接続線２０ａの部分にくびれ部２２ａを有する。モールド樹脂２２は、その接着成分として熱硬化性樹脂であるエポキシ樹脂が用いられる。 Further, in the armature 14 of the present embodiment, the mold resin 22 is provided between the commutator 19 and the end face 18 a on the commutator 19 side of the core 18. The mold resin 22 covers the claws 19 a of the commutator 19 and the connecting wires 20 a of the windings 20 connected to the claws 19 a. The mold resin 22 does not extend to the end face 18 a of the core 18, that is, does not cover the core 18. In addition, the mold resin 22 has a constricted portion 22a in the portion of the connection wire 20a from which a part of the winding 20 is drawn. The mold resin 22 uses an epoxy resin which is a thermosetting resin as an adhesive component.
図２及び図３に示すように、くびれ部２２ａは、その外径Ｌ１が整流子１９（爪部１９ａを含む）の外径Ｌ２よりも小径となっている。
モールド樹脂２２には、少なくともくびれ部２２ａの外側を覆う保護カバー部２３が設けられる。保護カバー部２３は、耐熱性に優れるフッ素樹脂からなり、熱によって収縮する熱収縮チューブで構成される。このため、保護カバー部２３は、モールド樹脂２２の外形形状に倣った形状となっている。保護カバー部２３とモールド樹脂２２との間には接着剤が塗布されることなく、保護カバー部２３の収縮力で、両者は貼りついている。なお、保護カバー部２３は、モールド樹脂２２において応力が加わりやすい位置、即ちモールド樹脂２２が割れやすい位置である前記くびれ部２２ａを覆う構成であればよい。つまり、保護カバー部２３によってくびれ部２２ａを覆う構成であればモールド樹脂２２の全体を覆う必要性はない。
As shown in FIGS. 2 and 3, the outer diameter L1 of the constricted portion 22a is smaller than the outer diameter L2 of the commutator 19 (including the claws 19a).
The mold resin 22 is provided with a protective cover 23 that covers at least the outer side of the constriction 22a. The protective cover portion 23 is made of a fluorine resin which is excellent in heat resistance, and is formed of a heat-shrinkable tube which shrinks by heat. Therefore, the protective cover portion 23 has a shape that follows the outer shape of the mold resin 22. The adhesive is not applied between the protective cover portion 23 and the mold resin 22, and both are stuck by the contraction force of the protective cover portion 23. The protective cover portion 23 may be configured to cover the constricted portion 22 a which is a position where stress is easily applied in the mold resin 22, that is, a position where the mold resin 22 is easily broken. That is, as long as the constricted portion 22 a is covered by the protective cover portion 23, there is no need to cover the entire mold resin 22.
次に、電機子１４の製造方法（作用）を説明する。
図２に示すようにコア１８に巻回された巻線２０の接続線２０ａを整流子１９の爪部１９ａと接続する。
Next, a method of manufacturing the armature 14 will be described.
As shown in FIG. 2, the connecting wire 20 a of the winding 20 wound around the core 18 is connected to the claw portion 19 a of the commutator 19.
図３に示すように、整流子１９の爪部１９ａ並びに爪部１９ａに接続される巻線２０の接続線２０ａを覆うように樹脂をモールドしてモールド樹脂２２を形成する。そして、整流子１９の外径Ｌ２よりも大径でコア１８の外径Ｌ３よりも小径の内径Ｌ４を有する収縮前の保護カバー部２３を準備する。 As shown in FIG. 3, a resin is molded to form a mold resin 22 so as to cover the claws 19 a of the commutator 19 and the connecting wires 20 a of the windings 20 connected to the claws 19 a. Then, a protective cover portion 23 before contraction having an inner diameter L4 larger than the outer diameter L2 of the commutator 19 and smaller than the outer diameter L3 of the core 18 is prepared.
図４に示すように、収縮前の保護カバー部２３をモールド樹脂２２の外側を覆う位置に配置する。このとき、収縮前の保護カバー部２３の内径Ｌ４は、コア１８の外径Ｌ３よりも小径であるため、コア１８を保護カバー部２３によって覆うことが抑制されることとなる。 As shown in FIG. 4, the protective cover portion 23 before shrinkage is disposed at a position covering the outside of the mold resin 22. At this time, since the inner diameter L4 of the protective cover portion 23 before contraction is smaller than the outer diameter L3 of the core 18, covering of the core 18 with the protective cover portion 23 is suppressed.
次いで、収縮前の保護カバー部２３に熱を付与して熱収縮させてモールド樹脂２２に倣った形状の保護カバー部２３とする。これによって、モールド樹脂２２が保護カバー部２３によって覆われた状態を維持できる。 Next, heat is applied to the protective cover portion 23 before contraction to cause thermal contraction, and the protective cover portion 23 shaped according to the mold resin 22 is obtained. Thus, the mold resin 22 can be kept covered by the protective cover portion 23.
次に、本実施形態の効果を記載する。
（１）最も断線の可能性の高い整流子１９の爪部１９ａと巻線２０との接続部位をモールド樹脂２２で覆うことで確実な巻線２０保護が可能となり、巻線２０の断線を抑えることができる。
Next, the effects of the present embodiment will be described.
(1) By covering the connection portion between the claw portion 19a of the commutator 19 having the highest possibility of disconnection and the winding 20 with the mold resin 22, reliable winding 20 protection becomes possible, and the disconnection of the winding 20 is suppressed. be able to.
（２）モールド樹脂２２の外側を覆う保護カバー部２３が設けられることで、例えばモールド樹脂２２に作用する応力によってモールド樹脂２２が割れた場合であってもモールド樹脂２２が飛散することが抑えられる。 (2) By providing the protective cover portion 23 covering the outside of the mold resin 22, for example, the mold resin 22 is prevented from being scattered even when the mold resin 22 is broken by the stress acting on the mold resin 22. .
（３）保護カバー部２３が熱収縮チューブであるため、モールド樹脂２２に対して密着させるように取り付けることを容易にできる。
（４）くびれ部２２ａの外径Ｌ１を整流子１９の外径Ｌ２よりも小径とすることで、モールド樹脂２２の量を抑えてモールド樹脂２２の界面で発生する応力集中を抑えることができる。
(3) Since the protective cover portion 23 is a heat-shrinkable tube, it can be easily attached so as to be in intimate contact with the mold resin 22.
(4) By setting the outer diameter L1 of the constricted portion 22a to be smaller than the outer diameter L2 of the commutator 19, the amount of the mold resin 22 can be suppressed and the stress concentration generated at the interface of the mold resin 22 can be suppressed.
（第２実施形態）
次に、第２実施形態のモータについて説明する。なお、本実施形態においては、第１実施形態との相違点を中心に説明し、第１実施形態の同様の構成には同一の符号を付して説明の一部又は全部を割愛する。
Second Embodiment
Next, the motor of the second embodiment will be described. In the present embodiment, differences from the first embodiment will be mainly described, and the same configuration as the first embodiment is denoted by the same reference numeral and part or all of the description will be omitted.
図５に示すように、本実施形態の電機子１４は、第１実施形態と異なり、第１保護カバー３１と第２保護カバー３２とで保護カバー部２３が構成される。
第１保護カバー３１は、爪部１９ａ並びに該爪部１９ａ寄りの巻線２０（接続線２０ａ）に対応する位置のモールド樹脂２２を覆うようになっている。第２保護カバー３２は、コア１８寄りの巻線２０に対応する位置のモールド樹脂２２を覆うようになっている。
As shown in FIG. 5, in the armature 14 of the present embodiment, unlike the first embodiment, the protective cover portion 23 is configured by the first protective cover 31 and the second protective cover 32.
The first protective cover 31 covers the molding resin 22 at a position corresponding to the claw portion 19a and the winding wire 20 (connection wire 20a) near the claw portion 19a. The second protective cover 32 covers the mold resin 22 at a position corresponding to the winding 20 close to the core 18.
第１保護カバー３１と前記第２保護カバー３２とはモールド樹脂２２のくびれ部２２ａにおいてそれぞれが重なるように設けられる。つまり、第１保護カバー３１と第２保護カバー３２とにより、くびれ部２２ａが確実に覆われた構成となっている。なお、第１実施形態と同様に、各カバー３１，３２は、モールド樹脂２２において応力が加わりやすい位置、即ちモールド樹脂２２が割れやすい位置であるくびれ部２２ａを覆う構成であればよい。つまり、各カバー３１，３２によってくびれ部２２ａを覆う構成であればモールド樹脂２２の全体を覆う必要性はない。 The first protective cover 31 and the second protective cover 32 are provided so as to overlap each other at the constriction 22 a of the mold resin 22. That is, the constricted portion 22 a is reliably covered by the first protective cover 31 and the second protective cover 32. As in the first embodiment, each of the covers 31 and 32 may be configured to cover the narrow portion 22 a which is a position where stress is easily applied in the mold resin 22, that is, a position where the mold resin 22 is easily broken. That is, as long as the constricted portion 22 a is covered by the covers 31 and 32, there is no need to cover the entire mold resin 22.
また、第１保護カバー３１は透明の熱収縮チューブであって、第２保護カバー３２は黒色の熱収縮チューブで構成される。第１保護カバー３１を透明とすることでモールド樹脂２２が爪部１９ａを覆っているかといったモールド樹脂２２の状態を確認しやすくなっている。また、第２保護カバー３２を黒色とすることで、保護カバー部２３が付いているか否かを認識（判定）することが容易となっている。 The first protective cover 31 is a transparent heat shrinkable tube, and the second protective cover 32 is a black heat shrinkable tube. By making the first protective cover 31 transparent, it is easy to confirm the state of the mold resin 22 as to whether the mold resin 22 covers the claws 19a. Further, by making the second protective cover 32 black, it is easy to recognize (determine) whether or not the protective cover portion 23 is attached.
次に、電機子１４の製造方法（作用）を説明する。
図６に示すように、整流子１９の爪部１９ａ並びに爪部１９ａに接続される巻線２０の接続線２０ａを覆うように樹脂をモールドしてモールド樹脂２２を形成する。そして、整流子１９の外径Ｌ２よりも大径でコア１８の外径Ｌ３よりも小径の内径Ｌ６を有する収縮前の第１保護カバー３１を準備する。
Next, a method of manufacturing the armature 14 will be described.
As shown in FIG. 6, a mold resin 22 is formed by molding a resin so as to cover the claws 19a of the commutator 19 and the connecting wires 20a of the windings 20 connected to the claws 19a. Then, the first protective cover 31 before contraction having an inner diameter L6 larger than the outer diameter L2 of the commutator 19 and smaller than the outer diameter L3 of the core 18 is prepared.
図７に示すように、収縮前の第１保護カバー３１をモールド樹脂２２の外側を覆う位置であって爪部１９ａ並びに該爪部１９ａ寄りの巻線２０（接続線２０ａ）に対応する位置に配置する。 As shown in FIG. 7, the first protective cover 31 before shrinkage is at a position covering the outside of the mold resin 22 and at a position corresponding to the claw portion 19a and the winding 20 (connection wire 20a) near the claw portion 19a. Deploy.
図８に示すように、収縮前の第１保護カバー３１に熱を付与（第１加熱工程）し、熱収縮させてモールド樹脂２２に倣った形状の第１保護カバー３１とする。このとき、第１保護カバー３１は、モールド樹脂２２のくびれ部２２ａを覆うようになっている。その後、収縮前並びに収縮後の第１保護カバー３１よりも大径であってコア１８の外径Ｌ３よりも小径の内径Ｌ７を有する収縮前の第２保護カバー３２を準備する。 As shown in FIG. 8, heat is applied to the first protective cover 31 before shrinkage (first heating step), and it is thermally shrunk to form the first protective cover 31 shaped according to the mold resin 22. At this time, the first protective cover 31 covers the narrow portion 22 a of the mold resin 22. Then, the second protective cover 32 before contraction is prepared which has an inner diameter L7 larger in diameter than the first protective cover 31 before and after contraction and smaller than the outer diameter L3 of the core 18.
図９に示すように、収縮前の第２保護カバー３２をモールド樹脂２２の外側を覆う位置であってコア１８寄りの巻線２０に対応する位置に配置する。このとき、収縮前の第２保護カバー３２の内径Ｌ７は、コア１８の外径Ｌ３よりも小径であるため、コア１８を第２保護カバー３２によって覆うことが抑制されることとなる。 As shown in FIG. 9, the second protective cover 32 before contraction is disposed at a position covering the outside of the mold resin 22 and at a position corresponding to the winding 20 closer to the core 18. At this time, since the inner diameter L7 of the second protective cover 32 before contraction is smaller than the outer diameter L3 of the core 18, covering of the core 18 with the second protective cover 32 is suppressed.
次いで、収縮前の第２保護カバー３２に熱を付与（第２加熱工程）し、熱収縮させてモールド樹脂２２に倣った形状の第２保護カバー３２とする。このとき、第２保護カバー３２は、モールド樹脂２２のくびれ部２２ａを覆っている第１保護カバー３１を覆うようになっている。第１保護カバー３１の外側を第２保護カバー３２が覆うように各カバー３１，３２が重なっている。このようにして、モールド樹脂２２が保護カバー部２３によって覆われた状態を維持できる。 Next, heat is applied to the second protective cover 32 before shrinkage (second heating step), and the heat is shrunk to form a second protective cover 32 shaped according to the mold resin 22. At this time, the second protective cover 32 is configured to cover the first protective cover 31 which covers the constricted portion 22 a of the mold resin 22. The covers 31 and 32 overlap so that the second protective cover 32 covers the outside of the first protective cover 31. In this manner, the mold resin 22 can be kept covered by the protective cover portion 23.
上記のように構成された電機子１４は、第１実施形態の（１）〜（４）の効果に加え、以下の効果を奏する。
（５）保護カバー部２３を第１保護カバー３１と第２保護カバー３２との２部品を備える構成とすることで、それぞれの位置を確実に覆ってモールド樹脂２２が外部に露出することが抑えられる。
The armature 14 configured as described above exerts the following effects in addition to the effects (1) to (4) of the first embodiment.
(5) By providing the protective cover portion 23 with the two components of the first protective cover 31 and the second protective cover 32, it is possible to reliably cover the respective positions and prevent the mold resin 22 from being exposed to the outside. Be
（６）第１保護カバー３１と第２保護カバー３２とは一部が重なるように設けられるため、各保護カバー３１，３２間での隙間をなくすことができる。
（７）第１保護カバー３１と第２保護カバー３２との重なる位置がくびれ部２２ａであるため、モールド樹脂２２の内で応力の加わりやすい位置であるくびれ部２２ａを確実に覆うことができる。
(6) Since the first protective cover 31 and the second protective cover 32 are provided so as to partially overlap with each other, gaps between the protective covers 31 and 32 can be eliminated.
(7) Since the overlapping position of the first protective cover 31 and the second protective cover 32 is the constricted portion 22a, the constricted portion 22a which is a position to which a stress is easily applied in the mold resin 22 can be reliably covered.
なお、上記各実施形態は、以下のように変更してもよい。
・図１０に示すように、収縮前の第２保護カバー３２の形状を巻線２０の形状に倣って整流子１９側ほど細い筒形状をなすように構成してもよい。このような構成とすることで、第２保護カバー３２が回転軸１５の軸方向に対する位置ずれを抑えることができる。
The above embodiments may be modified as follows.
As shown in FIG. 10, the shape of the second protective cover 32 before contraction may be formed into a cylindrical shape that is thinner toward the commutator 19 according to the shape of the winding 20. With such a configuration, it is possible to suppress the positional deviation of the second protective cover 32 in the axial direction of the rotating shaft 15.
・上記第２実施形態では、第１保護カバー３１と第２保護カバー３２とがくびれ部２２ａにおいて重なるような構成としたが、重なる位置は適宜変更してもよい。また、第１保護カバー３１と第２保護カバー３２との端部同士を突き当てて重ならないような構成を採用してもよい。 In the second embodiment, the first protective cover 31 and the second protective cover 32 overlap at the constricted portion 22a, but the overlapping position may be changed as appropriate. Also, a configuration may be adopted in which the end portions of the first protective cover 31 and the second protective cover 32 are butted against each other so as not to overlap.
・上記第２実施形態では、第１保護カバー３１を透明の熱収縮チューブを用い、第２保護カバー３２を黒色の熱収縮チューブを用いることとしたが、これに限らない。例えば各保護カバー３１，３２を同系色の熱収縮チューブを用いたり、各保護カバー３１，３２の両方を透明の熱収縮チューブで構成してもよい。 In the second embodiment, although the first protective cover 31 uses a transparent heat-shrinkable tube and the second protective cover 32 uses a black heat-shrinkable tube, the present invention is not limited to this. For example, the protective covers 31, 32 may be heat-shrinkable tubes of the same color, or both of the protective covers 31, 32 may be made of transparent heat-shrinkable tubes.
・上記第２実施形態では、２つの保護カバー３１，３２を用いる構成としたが、３つ以上の保護カバーを用いる構成を採用してもよい。
・上記第１及び第２実施形態では、くびれ部２２ａの外径Ｌ１を整流子１９の外径Ｌ２よりも小径としたが、これに限らず、くびれ部２２ａの外径Ｌ１を整流子１９の外径Ｌ２よりも大径としてもよい。また、くびれ部２２ａに対応する部位に保護カバー部２３を取り付けた状態の外径を、整流子１９の外径Ｌ１よりも小径としてもよい。
In the second embodiment, the two protective covers 31 and 32 are used. However, a configuration using three or more protective covers may be employed.
In the first and second embodiments, the outer diameter L1 of the constricted portion 22a is smaller than the outer diameter L2 of the commutator 19. However, the present invention is not limited thereto. The outer diameter L1 of the constricted portion 22a is not limited to this. The diameter may be larger than the outer diameter L2. Further, the outer diameter in a state where the protective cover portion 23 is attached to a portion corresponding to the constricted portion 22 a may be smaller than the outer diameter L 1 of the commutator 19.
・上記第１及び第２実施形態では、保護カバー部２３として熱収縮チューブを用いることとしたが、これに限らず、例えば帯状のシート部材をモールド樹脂２２に巻きつけて保護カバーを構成してもよい。 In the first and second embodiments, a heat-shrinkable tube is used as the protective cover 23. However, the present invention is not limited to this. For example, a strip-shaped sheet member may be wound around the mold resin 22 to form a protective cover. It is also good.
・上記第１及び第２実施形態では、保護カバー部２３を設ける構成としたが、省略した構成を採用してもよい。
・上記各実施形態並びに各変形例は適宜組み合わせてもよい。
In the first and second embodiments, the protective cover portion 23 is provided. However, the omitted configuration may be employed.
-Each above-mentioned embodiment and each modification may be combined suitably.
１０…モータ、１４…電機子、１５…回転軸、１８…コア、１９…整流子、１９ａ…爪部、２０…巻線、２２…モールド樹脂、２２ａ…くびれ部、２３…保護カバー部、３１…第１保護カバー、３２…第２保護カバー、Ｌ１〜Ｌ３…外径。 DESCRIPTION OF SYMBOLS 10 ... Motor 14, 14 Armature, 15 ... Rotational axis, 18 ... Core, 19 ... Commutator, 19a ... Claw part, 20 ... Winding, 22 ... Mold resin, 22a ... Necking part, 23 ... Protective cover part, 31 ... first protective cover, 32 ... second protective cover, L1 to L3 ... outer diameter.
Claims (10)
少なくとも前記爪部と前記巻線との接続部分を覆うモールド樹脂が設けられることを特徴とする電機子。 A rotating shaft, a core fixed to the rotating shaft, a winding wound around the core, and a commutator fixed to the rotating shaft having a claw portion to which the winding is connected An armature provided,
An armature provided with a mold resin which covers at least a connection portion between the claw portion and the winding.
前記モールド樹脂の外側を覆う保護カバー部が設けられることを特徴とする電機子。 In the armature according to claim 1,
An armature provided with a protective cover that covers the outside of the mold resin.
前記保護カバー部は、熱収縮チューブであることを特徴とする電機子。 In the armature according to claim 2,
The armature, wherein the protective cover portion is a heat-shrinkable tube.
前記モールド樹脂は、前記整流子と前記コア端面との間にくびれ部を有し、
前記保護カバー部は、前記爪部並びに該爪部寄りの前記巻線に対応する位置の前記モールド樹脂を覆う第１保護カバーと、前記コア寄りの前記巻線に対応する位置の前記モールド樹脂を覆う第２保護カバーとを備えることを特徴とする電機子。 In the armature according to claim 3,
The mold resin has a constriction portion between the commutator and the core end face,
The protective cover portion includes a first protective cover that covers the claw portion and the mold resin at a position corresponding to the winding close to the claw portion, and the mold resin at a position corresponding to the winding near the core An armature comprising: a second protective cover that covers the motor.
前記第１保護カバーと前記第２保護カバーとは一部が重なるように設けられることを特徴とする電機子。 In the armature according to claim 4,
An armature, wherein the first protective cover and the second protective cover are provided so as to partially overlap with each other.
前記くびれ部の外径は、前記整流子の外径よりも小径であることを特徴とする電機子。 In the armature according to claim 4 or 5,
An armature, wherein an outer diameter of the narrowed portion is smaller than an outer diameter of the commutator.
前記くびれ部に対応する部位に前記保護カバー部を取り付けた状態の外径は、前記整流子の外径よりも小径であることを特徴とする電機子。 The armature according to any one of claims 4 to 6,
An armature characterized in that an outer diameter in a state where the protective cover portion is attached to a portion corresponding to the constricted portion is smaller than an outer diameter of the commutator.
少なくとも前記爪部と前記巻線との接続部分を樹脂によってモールドすることを特徴とする電機子の製造方法。 A rotating shaft, a core fixed to the rotating shaft, a winding wound around the core, and a commutator fixed to the rotating shaft having a claw portion to which the winding is connected A manufacturing method of the provided armature,
A method of manufacturing an armature, comprising molding at least a connection portion between the claw portion and the winding with a resin.
熱収縮チューブでなる第１保護カバーを前記爪部並びに該爪部寄りの前記巻線に対応する位置に配置した状態で加熱する第１加熱工程と、
前記第１加熱工程後に熱収縮チューブでなる第２保護カバーを前記コア寄りの前記巻線に対応する位置に配置した状態で加熱する第２加熱工程と、
を備えることを特徴とする電機子の製造方法。
The method of manufacturing an armature according to claim 9,
A first heating step of heating in a state in which a first protective cover made of a heat-shrinkable tube is disposed at a position corresponding to the claw portion and the winding close to the claw portion;
A second heating step of heating in a state where a second protective cover made of a heat-shrinkable tube is disposed at a position corresponding to the winding near the core after the first heating step;
A method of manufacturing an armature comprising:
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|---|---|---|---|
| JP2017169442A JP6912328B2 (en) | 2017-09-04 | 2017-09-04 | How to manufacture armatures, motors and armatures |
| PCT/JP2018/032078 WO2019044957A1 (en) | 2017-09-04 | 2018-08-30 | Armature, motor, and method for manufacturing armature |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58112043U (en) * | 1982-01-21 | 1983-07-30 | 愛三工業株式会社 | Armature of rotating electrical machine |
| JPH0354365U (en) * | 1989-06-01 | 1991-05-27 | ||
| US5727307A (en) * | 1993-11-15 | 1998-03-17 | Vacontec | Method for manufacturing an armature for an electric motor |
| JP2002315280A (en) * | 2001-04-18 | 2002-10-25 | Mitsuba Corp | Armature for electric motor, and manufacturing method thereof |
| JP2004201366A (en) * | 2002-12-16 | 2004-07-15 | Hitachi Koki Co Ltd | Commutator motor |
-
2017
- 2017-09-04 JP JP2017169442A patent/JP6912328B2/en active Active
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2018
- 2018-08-30 WO PCT/JP2018/032078 patent/WO2019044957A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58112043U (en) * | 1982-01-21 | 1983-07-30 | 愛三工業株式会社 | Armature of rotating electrical machine |
| JPH0354365U (en) * | 1989-06-01 | 1991-05-27 | ||
| US5727307A (en) * | 1993-11-15 | 1998-03-17 | Vacontec | Method for manufacturing an armature for an electric motor |
| JP2002315280A (en) * | 2001-04-18 | 2002-10-25 | Mitsuba Corp | Armature for electric motor, and manufacturing method thereof |
| JP2004201366A (en) * | 2002-12-16 | 2004-07-15 | Hitachi Koki Co Ltd | Commutator motor |
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