JPS5840789Y2 - coreless motor - Google Patents

Description

【考案の詳細な説明】 本考案は、円筒ヨーク１の中心部に配設した円柱状マグ
ネット６０周面に、周方向に沿って等角度間隔毎に交互
にＮ、Ｓ極を形成し、円筒ヨーク１の周胴に前記Ｎ、Ｓ
極にそれぞれ対応する窓２を設けるとともに前記円筒ヨ
ーク１の内径より小さな径の円弧状湾曲面４を中央部に
形成したヨーク片３を前記窓２に挿入固着して円弧状湾
曲面４を円筒ヨーク１の内周面より内側へ突出せしめ、
ヨーク片３の円弧状湾曲面４に対向してカップ状コイル
５側周の環状凹部５ａを配置して成るコアレスモータに
係り、その目的とするところはモータ効率が良くてしか
も組立ての簡単なコアレスモータを提供するにある。[Detailed description of the invention] The present invention forms N and S poles alternately at equal angular intervals along the circumferential direction on the circumferential surface of the cylindrical magnet 60 disposed at the center of the cylindrical yoke 1. The above-mentioned N and S are attached to the circumference of the yoke 1.
A window 2 corresponding to each pole is provided, and a yoke piece 3 having an arc-shaped curved surface 4 formed in the center with a smaller diameter than the inner diameter of the cylindrical yoke 1 is inserted and fixed into the window 2 to form the arc-shaped curved surface 4 into a cylinder. Projects inward from the inner peripheral surface of the yoke 1,
It relates to a coreless motor in which an annular recess 5a on the side circumference of a cup-shaped coil 5 is arranged opposite to an arc-shaped curved surface 4 of a yoke piece 3, and its purpose is to provide a coreless motor with high motor efficiency and easy assembly. It is in providing the motor.

第７図により従来例を説明すると、１はモーターケース
たる円筒ヨーク、６はマグネット、７はマグネット保持
板、８は軸受、９は軸、５は軸方向の両端が厚くなった
カップ状コイル、１０はコイル保持板、１１はモーター
ふた、１２は刷子、１３は整流子である。To explain the conventional example with reference to FIG. 7, 1 is a cylindrical yoke serving as a motor case, 6 is a magnet, 7 is a magnet holding plate, 8 is a bearing, 9 is a shaft, 5 is a cup-shaped coil with thickened ends in the axial direction, 10 is a coil holding plate, 11 is a motor lid, 12 is a brush, and 13 is a commutator.

従来のコアレスモータは第８図に示す如く、素線を巻い
て作製した線輪体１４をコイル保持板１０に巻きつけて
作ったカップ状コイル５を使用していたが、このカップ
状コイル５は軸方向の両端が周胴中央部に比して厚くな
るため円筒ヨーク１とマグネット６とのエアーギャップ
が広くなり、モータ効率が低くなる欠点があった。As shown in FIG. 8, a conventional coreless motor uses a cup-shaped coil 5 made by winding a wire ring body 14 made by winding a wire around a coil holding plate 10. Since both ends in the axial direction are thicker than the center of the circumferential body, the air gap between the cylindrical yoke 1 and the magnet 6 becomes wider, resulting in lower motor efficiency.

またこの欠点をなくするため、第９図に示す如くカップ
状コイル５側周の環状凹部５ａに磁性体１５を配置して
エアーギャップを狭くした構成のコアレスモータにあっ
ては、組立が非常に困難で製造コストが高くなる欠点が
あった。In order to eliminate this drawback, as shown in FIG. 9, a coreless motor has a configuration in which a magnetic material 15 is arranged in an annular recess 5a on the side circumference of a cup-shaped coil 5 to narrow the air gap, which makes assembly extremely difficult. The drawback was that it was difficult and expensive to manufacture.

本考案はこのような点に鑑みてなされたものであって、
以下実施例を図面により説明する。The present invention was made in consideration of these points, and
Examples will be described below with reference to the drawings.

第１図は本考案の一実施例を示したものであって、円筒
ヨーク１０周胴に第３図に示すように一対の矩形状窓２
．２を設けである。FIG. 1 shows an embodiment of the present invention, in which a pair of rectangular windows 2 are provided in a cylindrical yoke with 10 circumferences as shown in FIG.
．． 2 is provided.

ヨーク片３は円筒ヨーク１の内径より小さな径の円弧状
湾曲面４を有しており、このヨーク片３を円筒ヨーク１
の窓２に外方から第２図のように挿入して固着し、カッ
プ状コイル５の環状凹部５ａに対向して円弧状湾曲面４
を配置しである。The yoke piece 3 has an arcuate curved surface 4 with a smaller diameter than the inner diameter of the cylindrical yoke 1.
is inserted into the window 2 from the outside as shown in FIG.
It is arranged.

この構成によってマグネット６と円筒ヨーク１との間の
エアギャップが小さくなり、モータ効率が良くなるもの
である。This configuration reduces the air gap between the magnet 6 and the cylindrical yoke 1, improving motor efficiency.

第４図は本考案の他の実施例を示しており、第６図に示
すようにヨーク片３０円弧状湾曲面４を湾曲マグネット
板１６にて形成し、該湾曲マグネット板１６をカップ状
コイ）ｖ５の環状凹部５ａに対向配置させたものであり
、湾曲マグネット板１６の磁極方向を第５図のように設
定してマグネット６円筒ヨーク１との間の磁束密度を増
加させることができる。FIG. 4 shows another embodiment of the present invention, in which the yoke piece 30 and the arc-shaped curved surface 4 are formed of a curved magnet plate 16, and the curved magnet plate 16 is formed by a cup-shaped coil. ) The magnetic flux density between the magnet 6 and the cylindrical yoke 1 can be increased by setting the magnetic pole direction of the curved magnet plate 16 as shown in FIG.

本考案にあっては、円筒ヨークの周胴に窓を設けるとと
もに前記円筒ヨークの内径より小さな径の円弧状湾曲面
を有するヨーク片を形成し、このヨーク片を前記窓に挿
入固着して円弧状湾曲面を円筒ヨークの内周面より内側
へ突出させであるから・カップ状コイル側周の環状凹部
と円周ヨークとの間のエアギャップをヨーク片により小
さくできるので、カップ状コイルに対する磁気密度が増
加してモータ効率が良くなるものであり、しかもヨーク
片を円筒ヨークの窓に挿入固着するだけで良いので組立
が簡単で製造コストの低減化を計ることができるという
利点を有するものである。In the present invention, a window is provided in the peripheral body of the cylindrical yoke, and a yoke piece having an arcuate curved surface with a smaller diameter than the inner diameter of the cylindrical yoke is formed, and this yoke piece is inserted and fixed into the window to form a circular shape. Since the arcuate curved surface protrudes inward from the inner circumferential surface of the cylindrical yoke, the air gap between the annular recess on the side circumference of the cup-shaped coil and the circumferential yoke can be made smaller by the yoke piece, so the magnetic field against the cup-shaped coil can be reduced. This increases the density and improves the motor efficiency, and it also has the advantage of being easy to assemble and reducing manufacturing costs because all you have to do is insert and secure the yoke piece into the window of the cylindrical yoke. be.

なお本考案にあっては、円筒ヨークの中心部には比較的
製作の容易な円柱状のマグネットを配設し、代わりに外
側のヨーク片として中央韻に円弧状湾曲面を有する磁性
体板を配設することによって簡単な構造でありながらＮ
、Ｓ極の近傍に容易に磁束が集中するようにして、モー
タ効率の向上を図っているものである。In the present invention, a cylindrical magnet, which is relatively easy to manufacture, is placed in the center of the cylindrical yoke, and instead, a magnetic plate having an arcuate curved surface at the center is used as an outer yoke piece. Although it has a simple structure by arranging it, N
, the magnetic flux is easily concentrated near the S pole to improve motor efficiency.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例の断面図、第２図は同上のＸ
−で断面図、第３図は同上の円筒ヨークおよびヨーク片
の分解斜視図、第４図は本考案の他の実施例の断面図、
第５図は同上のｙ−？断面図、第６図は同上のヨーク片
の斜視図、第７図は従来例の断面図、第８図は同従来例
のカップ状コイルの説明図、第９図は他の従来例の断面
図であり、１は円筒ヨーク、２は窓、３はヨーク片、４
は円弧状湾曲部、５はカップ状コイル、５ａは環状四部
を示している。Figure 1 is a sectional view of one embodiment of the present invention, and Figure 2 is the same
3 is an exploded perspective view of the same cylindrical yoke and yoke piece, and FIG. 4 is a sectional view of another embodiment of the present invention.
Figure 5 shows y-? 6 is a perspective view of the same yoke piece as above, FIG. 7 is a sectional view of the conventional example, FIG. 8 is an explanatory diagram of the cup-shaped coil of the conventional example, and FIG. 9 is a sectional view of another conventional example. In the figure, 1 is a cylindrical yoke, 2 is a window, 3 is a yoke piece, and 4 is a cylindrical yoke.
5 indicates a circular arc-shaped curved portion, 5 indicates a cup-shaped coil, and 5a indicates an annular four section.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 円筒ヨークの中心部に配設した円柱状マグネットの周面
に、周方向に沿って等角度間隔毎に交互にＮ、Ｓ極を形
成し、円筒ヨニクの周胴に前記Ｎ１Ｓ極にそれぞれ対応
する窓を設けるとともに前記円筒ヨークの内径より小さ
な径２０円弧状湾曲面を中央部に形成したヨーク片を前
記窓に挿入固着して円弧状湾曲面を円筒ヨークの内周面
より内側へ突出せしめ、ヨーク片の円弧状湾曲面に対向
してカップ状コイル側周の環状凹部を配置して成るコア
レスモータ。N and S poles are formed alternately at equal angular intervals along the circumferential direction on the circumferential surface of a cylindrical magnet disposed at the center of the cylindrical yoke, and correspond to the N1 and S poles on the circumferential body of the cylindrical yoke, respectively. A yoke piece having a window provided therein and a 20-circular curved surface with a diameter smaller than the inner diameter of the cylindrical yoke formed in the center thereof is inserted and fixed into the window so that the arc-shaped curved surface protrudes inward from the inner peripheral surface of the cylindrical yoke; A coreless motor in which an annular recess on the side circumference of a cup-shaped coil is arranged opposite to an arcuate curved surface of a yoke piece.