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JP2009100583A - Coreless motor - Google Patents

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Publication number
JP2009100583A
JP2009100583A JP2007270855A JP2007270855A JP2009100583A JP 2009100583 A JP2009100583 A JP 2009100583A JP 2007270855 A JP2007270855 A JP 2007270855A JP 2007270855 A JP2007270855 A JP 2007270855A JP 2009100583 A JP2009100583 A JP 2009100583A
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Japan
Prior art keywords
cup
winding coil
cylindrical winding
shaft
housing
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Pending
Application number
JP2007270855A
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Japanese (ja)
Inventor
Masakatsu Okubo
将克 大久保
Naoto Yamakawa
直人 山川
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Citizen Sayama Co Ltd
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Citizen Sayama Co Ltd
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Publication date
Application filed by Citizen Sayama Co Ltd filed Critical Citizen Sayama Co Ltd
Priority to JP2007270855A priority Critical patent/JP2009100583A/en
Publication of JP2009100583A publication Critical patent/JP2009100583A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coreless motor arranged such that the insulating film of a cup-type cylindrical winding coil is not broken easily owing to a fact that the cup-type cylindrical winding coil is not manufactured into a true circle when assembling a coreless motor (attachment work of a heat dissipation plate). <P>SOLUTION: In the coreless motor, a heat dissipation plate fixed to a shaft while touching the inner circumferential surface of a cup-type cylindrical winding coil is formed into polygonal shape having the same number or more of sides as that of the segments of the coil integrally with or separately from a mold board. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、樹脂製のモールド板に一体又は別体の放熱板を取付けたコアレスモータに関するものである。 The present invention relates to a coreless motor in which an integral or separate heat dissipation plate is attached to a resin mold plate.

昨今様々な用途に使用されるコアレスモータは、一端が開口した金属製ハウジングの底壁の中心部からメタルホルダ部が内方に向けて延びており、そのメタルホルダ部の外周にはマグネットが圧入により嵌装されている。
また、メタルホルダ部には、その両端に軸受が圧入されており、シャフトが回転可能に支持されている。
前記シャフトには、該シャフトを軸心としマグネットと、ハウジング間の隙間にカップ型の円筒巻線コイルが、マグネットの外周面および内壁との間にそれぞれ空隙が形成され、互いに接触しないように配置されている。
前記ハウジングの開口端と、開口端側の軸受との間にカップ型の円筒巻線コイルとシャフトをつなぐエンドブロックが整流子を備えて設けられており、さらにハウジングの開口端には整流子に摺接するブラシを備えるキャップが、そしてキャップの中心部の穴を塞ぐカバー部材が取付けられている。
特開2002−78274号公報
In coreless motors used in various applications these days, the metal holder part extends inward from the center of the bottom wall of the metal housing with one open end, and a magnet is pressed into the outer periphery of the metal holder part. It is fitted by.
Further, bearings are press-fitted at both ends of the metal holder portion, and the shaft is rotatably supported.
The shaft is centered on the shaft, and a cup-shaped cylindrical coil is formed in the gap between the magnet and the housing, and a gap is formed between the outer peripheral surface and the inner wall of the magnet so as not to contact each other. Has been.
An end block that connects the cup-shaped cylindrical winding coil and the shaft is provided between the opening end of the housing and the bearing on the opening end side, and a commutator is provided at the opening end of the housing. A cap having a brush that comes into sliding contact with the cover member and a cover member that closes the hole in the center of the cap are attached.
JP 2002-78274 A

ところで、上述したコアレスモータを、長時間に亘って使用するケースや、又は規格以上の電流、電圧の使用によってカップ型の円筒巻線コイルが発熱を生じるものであった。この発熱は、モータの構造上、ほぼ密閉状態であるため、内部で対流し、結果、モータ寿命等が著しく低下する等の悪影響を及ぼしていた。 By the way, a case where the above-described coreless motor is used for a long time, or a cup-shaped cylindrical winding coil generates heat due to use of a current or voltage exceeding the standard. Since this heat generation is almost hermetically sealed due to the structure of the motor, it convects inside, resulting in adverse effects such as a significant reduction in motor life.

上述したカップ型の円筒巻線コイルの発熱対策として、熱伝導性に優れた、例えばアルミニウム、カーボン等からなる放熱板を、カップ型の円筒巻線コイルに接して取付け、放熱板を介して、その発熱をハウジングより外部に発散する構造(方法)が提案、知られている。 As a countermeasure against heat generation of the cup-shaped cylindrical winding coil described above, a heat sink made of, for example, aluminum, carbon, etc. excellent in thermal conductivity is attached in contact with the cup-shaped cylindrical winding coil, A structure (method) for radiating the heat generation from the housing to the outside has been proposed and known.

しかしながら、カップ型の円筒巻線コイルの発熱を効率よく伝導発散するには、放熱板をカップ型の円筒巻線コイルと同形状の、即ち円形状にすることが最も好ましい(効率の良い)形状ではあるが、組立作業等の際に、カップ型の円筒巻線コイルに外傷(絶縁皮膜が破れる)を生じさせるものであった。
これは、カップ型の円筒巻線コイルが真円に製作されていないことに要因があるものの、放熱板は、カップ型の円筒巻線コイルに接した状態で内装されねばならず、双方に厳しい製作、管理等を要求するものであり、外傷を生じたカップ型の円筒巻線コイルを知らずに使用すると、コイルのセグメント間で短絡(ショート)を生じるというモータにとっては致命的な問題を招く。
However, in order to efficiently conduct and radiate the heat generated by the cup-shaped cylindrical winding coil, it is most preferable that the heat sink has the same shape as the cup-shaped cylindrical winding coil, that is, a circular shape (high efficiency). However, during assembly work or the like, the cup-shaped cylindrical winding coil is damaged (insulating film is broken).
Although this is due to the fact that the cup-shaped cylindrical winding coil is not manufactured in a perfect circle, the heat sink must be installed in contact with the cup-shaped cylindrical winding coil, and both are severe. Manufacturing, management, etc. are required, and if a cup-shaped cylindrical winding coil with trauma is used without knowing it, it causes a fatal problem for the motor that causes a short circuit between the coil segments.

本発明の目的は、以上の点に鑑みなされたもので、カップ型の円筒巻線コイルに外傷を与えることのないコアレスモータを提供する。 The object of the present invention is made in view of the above points, and provides a coreless motor that does not damage a cup-shaped cylindrical winding coil.

このため、本発明にかかるコアレスモータは、一端が開口した有底円筒状の金属製ハウジングと、ハウジング内方へ所定長さ延びたホルダ部と、ホルダ部の外周に支持されるマグネットと、ホルダ部の両端部に取付けられた軸受と、マグネットとハウジングの内壁間の間隙に配置されたカップ型の円筒巻線コイルと、軸受間に支持されたシャフトと、整流子と基板をインサートモールドし、シャフトに固定された樹脂製のモールド板と、モールド板に一体又は別体に、且つカップ型の円筒巻線コイルの内周面に接してシャフトに固定されて取り付けられた放熱板と、整流子と摺接するブラシを備えるブラシ台とから構成されたコアレスモータに於いて、前記放熱板をコイルのセグメントと同数又はそれ以上の多角形状に形成したことを特徴とする。 For this reason, a coreless motor according to the present invention includes a bottomed cylindrical metal housing having an open end, a holder portion extending a predetermined length inward of the housing, a magnet supported on the outer periphery of the holder portion, a holder Insert-molded bearings attached to both ends of the part, a cup-shaped cylindrical coil disposed in the gap between the magnet and the inner wall of the housing, a shaft supported between the bearings, a commutator and a substrate, A resin mold plate fixed to the shaft, a heat sink integrated with or separately from the mold plate, and in contact with the inner peripheral surface of the cup-shaped cylindrical winding coil and fixed to the shaft, and a commutator In a coreless motor comprising a brush base having a brush in sliding contact with the heat sink, the heat sink is formed in a polygonal shape equal to or more than the coil segments. That.

本発明の構成によれば、少なくともコイルのセグメントと同数又はそれ以上の多角形状に形成した放熱板により、その組立作業時等に生じていた、例えばカップ型の円筒巻線コイルが真円に製作されていないことに起因するカップ型の円筒巻線コイルの絶縁皮膜の破れが生じ難くなる。結果、短絡(ショート)というモータにとって致命的な問題を招くことがない。 According to the configuration of the present invention, for example, a cup-shaped cylindrical coil is produced in a perfect circle by using a heat sink formed in a polygonal shape at least as many as the coil segments, for example, during the assembly operation. This makes it difficult to break the insulation film of the cup-shaped cylindrical winding coil due to the fact that it is not done. As a result, a fatal problem for the motor, which is a short circuit, is not caused.

以下、各図面に基づいて実施形態を詳細に説明する。 Hereinafter, embodiments will be described in detail with reference to the drawings.

以下、各図面に基づいて、本発明のコアレスモータの構成について説明する。
図1に示すコアレスモータは、両端が開口した金属製の円筒形ハウジング1の一端に、メタルホルダ部2aがハウジング1内方へ所定長さ延びたメタルハウス2が嵌合支持されている。
前記メタルホルダ部2a(メタルハウス2)の端面には外側から軸受3が圧入されている。また、メタルホルダ部2aの内端には軸受4が圧入され、軸受4の端面とハウジング1の開口端の間には所定のスペースが残されている。さらにメタルホルダ部2aの外周にはマグネット5が同じく圧入により嵌装されている。
Hereinafter, the configuration of the coreless motor of the present invention will be described with reference to the drawings.
In the coreless motor shown in FIG. 1, a metal house 2 in which a metal holder portion 2 a extends inward to the housing 1 by a predetermined length is fitted and supported at one end of a metal cylindrical housing 1 having both ends opened.
A bearing 3 is press-fitted from the outside into the end surface of the metal holder portion 2a (metal house 2). Further, the bearing 4 is press-fitted into the inner end of the metal holder portion 2 a, and a predetermined space is left between the end surface of the bearing 4 and the open end of the housing 1. Further, a magnet 5 is similarly fitted by press-fitting to the outer periphery of the metal holder portion 2a.

ロータ6は、軸受3、軸受4に回転可能に支持されたシャフト7と、シャフト7を軸心としたマグネット5と、ハウジング1間の隙間に配置されたカップ型の円筒巻線コイル8と、整流子9、基板10をインサートモールドした樹脂製のモールド板20と、後述する放熱板30とからなる。 The rotor 6 includes a bearing 3, a shaft 7 rotatably supported by the bearing 4, a magnet 5 having the shaft 7 as an axis, a cup-shaped cylindrical winding coil 8 disposed in a gap between the housings 1, It consists of a resin mold plate 20 in which the commutator 9 and the substrate 10 are insert-molded, and a heat radiating plate 30 described later.

他方の開口側のハウジング1には、前記整流子9に摺接するブラシ11を保持固定するブラシ台12を嵌合させ取付けてハウジング1内部を密閉状に成している。尚、ブラシ台11には電気を流すために各リード線13が接続されている。 The housing 1 on the other opening side is fitted and attached with a brush base 12 for holding and fixing the brush 11 slidably contacting the commutator 9 so that the inside of the housing 1 is hermetically sealed. In addition, each lead wire 13 is connected to the brush base 11 in order to flow electricity.

さらに、前記モールド板20と放熱板30について詳しく説明する。
図2に示すように、円形状に形成され樹脂製のモールド板20は、カップ型の円筒巻線コイル8の内周面で接着固定され、且つ整流子9は、そのセグメント部分においてブラシ11と接続される。
また、樹脂製のモールド板20の周縁には間隔をおいて窪み状の凹部20aが複数個(セグメント数と同数個)設けられている。この凹部20aは、後述する放熱板30の頂点部30aとの取付け時、位置合わせを容易にするためのものである。
Further, the mold plate 20 and the heat radiating plate 30 will be described in detail.
As shown in FIG. 2, the resin-made mold plate 20 formed in a circular shape is bonded and fixed on the inner peripheral surface of the cup-shaped cylindrical winding coil 8, and the commutator 9 is connected to the brush 11 in the segment portion. Connected.
In addition, a plurality of recessed portions 20a (the same number as the number of segments) are provided on the periphery of the resin mold plate 20 at intervals. The concave portion 20a is for facilitating alignment when attached to the apex portion 30a of the heat radiating plate 30 described later.

次に、図3に示すように、放熱板30は、その材質を熱伝導性に優れた例えば、鉄系、銀系、銅系、アルミニウム合金系、カーボン系により形成したものが用いられ、長時間に亘っての使用、又は正転、逆回転を常に繰り返す使用、回転を瞬時に止めるような使用にあっては、その発熱は放熱板30を介して、ハウジング1より外部に発散するものであって、モールド板20に一体又は別体に、且つカップ型の円筒巻線コイル8の内周面に接してシャフト7に軸支されている。 Next, as shown in FIG. 3, the heat radiating plate 30 is made of, for example, an iron-based, silver-based, copper-based, aluminum alloy-based, or carbon-based material having excellent thermal conductivity. In use over time, use that always repeats normal rotation and reverse rotation, or use that stops rotation instantaneously, the heat is emitted from the housing 1 to the outside via the heat sink 30. The shaft 7 is pivotally supported by the shaft 7 integrally or separately with the mold plate 20 and in contact with the inner peripheral surface of the cup-shaped cylindrical winding coil 8.

また、放熱板30は少なくともカップ型の円筒巻線コイル8のセグメント数(例えば、5角形、9角形、11角形)と同数、又はそれ以上の多角形状に形成され、その頂点部30aが円筒巻線コイル8の内周面に接触する。 Further, the heat sink 30 is formed in a polygonal shape equal to or more than the number of segments of the cup-shaped cylindrical winding coil 8 (for example, pentagonal, pentagonal, and ellipsoidal), and the apex 30a is cylindrically wound. It contacts the inner peripheral surface of the wire coil 8.

従って、従来コアレスモータ(放熱板30の組付作業)の組立時に生じていた、例えばカップ型の円筒巻線コイル8が真円に製作されていないことに起因する、前記カップ型の円筒巻線コイル8の絶縁皮膜の破れが生じ難くなる。 Therefore, for example, the cup-shaped cylindrical winding caused by the fact that, for example, the cup-shaped cylindrical winding coil 8 is not manufactured in a perfect circle, which has occurred during the assembly of the conventional coreless motor (the assembly operation of the heat sink 30). The insulating film of the coil 8 is hardly broken.

本発明のコアレスモータの内部構成を示す断面図である。It is sectional drawing which shows the internal structure of the coreless motor of this invention. 本発明のモールド板を示す正面図である。It is a front view which shows the mold plate of this invention. 本発明の放熱板を示す正面図である。It is a front view which shows the heat sink of this invention. 本発明の放熱板とモールド板とを取付け状態を示す正面図である。It is a front view which shows the attachment state of the heat sink and mold plate of this invention. 円筒巻線コイルに取付けた放熱板とモールド板を示す断面図である。It is sectional drawing which shows the heat sink and mold plate which were attached to the cylindrical winding coil.

符号の説明Explanation of symbols

6 カップ型の円筒巻線コイル
20 モールド板
20a 凹部
30 放熱板
30a 頂点部
6 Cup-shaped cylindrical winding coil 20 Mold plate 20a Recess 30 Heat sink 30a Vertex

Claims (1)

一端が開口した有底円筒状の金属製ハウジングと、ハウジング内方へ所定長さ延びたホルダ部と、ホルダ部の外周に支持されるマグネットと、ホルダ部の両端部に取付けられた軸受と、マグネットとハウジングの内壁間の間隙に配置されたカップ型の円筒巻線コイルと、軸受間に支持されたシャフトと、整流子と基板をインサートモールドし、シャフトに固定された樹脂製のモールド板と、モールド板に一体又は別体に、且つ円筒巻線コイルの内周面に接してシャフトに固定されて取付けられた放熱板と、整流子と摺接するブラシを備えるブラシ台とから構成されたコアレスモータに於いて、
前記放熱板をコイルのセグメントと同数又はそれ以上の多角形状に形成したことを特徴とするコアレスモータ。
A cylindrical metal housing with a bottom open at one end, a holder portion extending a predetermined length inward of the housing, a magnet supported on the outer periphery of the holder portion, and bearings attached to both ends of the holder portion, A cup-shaped cylindrical coil disposed in the gap between the magnet and the inner wall of the housing, a shaft supported between the bearings, a commutator and a substrate are insert-molded, and a resin mold plate fixed to the shaft A coreless structure comprising: a heat sink integrally attached to or separately from the mold plate, and fixed to the shaft in contact with the inner peripheral surface of the cylindrical coil; and a brush base having a brush that is in sliding contact with the commutator In the motor,
A coreless motor, wherein the heat radiating plate is formed in a polygonal shape equal to or more than the number of coil segments.
JP2007270855A 2007-10-18 2007-10-18 Coreless motor Pending JP2009100583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007270855A JP2009100583A (en) 2007-10-18 2007-10-18 Coreless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007270855A JP2009100583A (en) 2007-10-18 2007-10-18 Coreless motor

Publications (1)

Publication Number Publication Date
JP2009100583A true JP2009100583A (en) 2009-05-07

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Application Number Title Priority Date Filing Date
JP2007270855A Pending JP2009100583A (en) 2007-10-18 2007-10-18 Coreless motor

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105305738A (en) * 2014-07-10 2016-02-03 山东省明康安托山特种机电有限公司 Constructive method and structure of coreless motor stator and rotor assembling apparatus
CN108494180A (en) * 2018-05-31 2018-09-04 东莞市领亚自动化科技有限公司 A kind of hollow-cup motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105305738A (en) * 2014-07-10 2016-02-03 山东省明康安托山特种机电有限公司 Constructive method and structure of coreless motor stator and rotor assembling apparatus
CN108494180A (en) * 2018-05-31 2018-09-04 东莞市领亚自动化科技有限公司 A kind of hollow-cup motor
CN108494180B (en) * 2018-05-31 2023-12-01 东莞市领亚自动化科技有限公司 Hollow cup motor

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