JPH0467755A - Motor - Google Patents
MotorInfo
- Publication number
- JPH0467755A JPH0467755A JP2176763A JP17676390A JPH0467755A JP H0467755 A JPH0467755 A JP H0467755A JP 2176763 A JP2176763 A JP 2176763A JP 17676390 A JP17676390 A JP 17676390A JP H0467755 A JPH0467755 A JP H0467755A
- Authority
- JP
- Japan
- Prior art keywords
- stator
- rotor
- fixed
- iron core
- electric motor
- 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.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 230000005291 magnetic effect Effects 0.000 claims description 27
- 230000003993 interaction Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 10
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 101100491152 Caenorhabditis elegans lem-4 gene Proteins 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Landscapes
- Permanent Magnet Type Synchronous Machine (AREA)
- Rotational Drive Of Disk (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
この発明は電動機、特に円盤状の磁気ディスク等の記録
媒体に磁気記録信号を読み書きする磁気ヘッドを有する
磁気記録装置の記録媒体を回転させる電動機に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an electric motor, particularly an electric motor that rotates a recording medium of a magnetic recording device having a magnetic head for reading and writing magnetic recording signals on a recording medium such as a disc-shaped magnetic disk. Regarding.
[従来の技術]
上記この種の従来の電動機は、例えば実開昭60−13
5863号公報に開示されているような構成である。即
ち、第19図に示すように磁気ディスクを回転させるハ
ブ30が嵌合固着された回転軸31がハブ側と反ハブ側
の二個の軸受を介してフレーム32に固定された筒状の
軸受ボルダ33に回転可能に保持されている。[Prior Art] The above-mentioned conventional electric motor of this type is, for example, the
The configuration is as disclosed in Japanese Patent No. 5863. That is, as shown in FIG. 19, a rotating shaft 31 to which a hub 30 for rotating a magnetic disk is fitted and fixed is a cylindrical bearing fixed to a frame 32 via two bearings on the hub side and on the opposite side. It is rotatably held by a boulder 33.
軸受ホルダ33の外側にはドーナツ形の鉄心を有する固
定子34がねじによりフレーム32を挟んで固定され、
鉄心にはコイル35が巻装されている。回転軸31の反
ハブ側端には内周面に固定子34に対向する駆動用永久
磁石36を固着したヨーク37がねじ固定され、回転子
38が構成されている。駆動用永久磁石36は半径方向
に磁力を生じ、固定子34の鉄心に巻装されたコイル3
5に通電される電流によって回転トルクを発生する。A stator 34 having a donut-shaped iron core is fixed to the outside of the bearing holder 33 with a frame 32 sandwiched therebetween by screws.
A coil 35 is wound around the iron core. A yoke 37, which has a driving permanent magnet 36 fixed to the inner circumferential surface facing the stator 34, is screwed to the opposite end of the rotating shaft 31 to form a rotor 38. The driving permanent magnet 36 generates magnetic force in the radial direction, and the coil 3 wound around the iron core of the stator 34
A rotational torque is generated by the current applied to 5.
組立においては、軸受ホルタ33内に軸受により支承さ
れた回転軸31に回転子38が、軸受ホルダ33の外径
に固定子34が嵌合される構成であるため、固定子34
と回転子38との合心性が得やすく、回転子38と固定
子34との相対位置関係が精度良く決まる。During assembly, the rotor 38 is fitted to the rotating shaft 31 supported by a bearing in the bearing holder 33, and the stator 34 is fitted to the outer diameter of the bearing holder 33.
It is easy to obtain concentricity between the rotor 38 and the rotor 38, and the relative positional relationship between the rotor 38 and the stator 34 can be determined with high accuracy.
この電動機は、固定子34の外側に回転子38が位置す
る外回転型と称されるもので、インデックス検出用磁石
の磁束をインデックス検出素子で検出し、これに基づい
て固定子34の鉄心に巻かれたコイル35への通電制御
が行なわれて回転駆動する。This electric motor is called an external rotation type in which the rotor 38 is located outside the stator 34, and the magnetic flux of the index detection magnet is detected by an index detection element, and based on this, the iron core of the stator 34 is The wound coil 35 is energized and driven to rotate.
「発明が解決しようとする課題]
上記した従来の電動機は、回転子38が外側にあり、記
録媒体に対して半径方向へ直線動する磁気ヘッドを回転
子38の平面位置に配置することはできず、磁気記録装
置の薄型化か計りにくいことから、回転子が固定子の内
側にある内回転型の電動機が磁気記録装置に採用される
ようになってきている。しかしながら、従来の外回転型
のような仕方では内回転型の回転子と固定子との相対位
置を決めることはできず、特別な工夫もないまま基板等
のフレームに固定子をねじ締結により固定している。“Problems to be Solved by the Invention” In the conventional electric motor described above, the rotor 38 is located outside, and the magnetic head that moves linearly in the radial direction with respect to the recording medium cannot be placed in a plane position of the rotor 38. First, because it is difficult to measure the thinness of magnetic recording devices, inner-rotation type electric motors, in which the rotor is inside the stator, are increasingly being used in magnetic recording devices.However, the conventional outer-rotation type In this method, it is not possible to determine the relative position of the internal rotor and stator, and the stator is fixed to a frame such as a board by screws without any special measures.
この発明はかかる従来の問題点を解消するためになされ
たもので、回転子と同定子の相対位置が決めやすく、磁
気記録装置の薄型化に寄与できる内回転型の電動機を得
ることを目的とする。This invention was made in order to solve the problems of the conventional art, and its purpose is to obtain an inner-rotation type electric motor that makes it easy to determine the relative position of the rotor and the identifier, and that can contribute to making the magnetic recording device thinner. do.
[課題を解決するための手段]
この発明に係る電動機は、回転自在に支承された回転軸
と、半径方向に磁力を発生するリンク状の駆動用永久磁
石を有し、回転軸と一体になって回転する回転子と、鉄
心に複数のコイルが巻かれ駆動用永久磁石との磁気的作
用で回転子に回転力を発生させる回転子の外側に配置さ
れた固定子とを備えたもので、固定子または固定子を固
定する固定相手側の何れかまたは双方に一体に設けた突
出部によって固定子の上記回転子に対する相対位置を規
定したものである。[Means for Solving the Problems] An electric motor according to the present invention has a rotatably supported rotary shaft and a link-shaped driving permanent magnet that generates magnetic force in the radial direction, and is integrated with the rotary shaft. The rotor is equipped with a rotor that rotates by a rotor, and a stator placed outside the rotor, which has multiple coils wound around an iron core and generates rotational force in the rotor through magnetic interaction with a driving permanent magnet. The relative position of the stator with respect to the rotor is defined by a protrusion integrally provided on either or both of the stator and the fixed partner to which the stator is fixed.
またこの発明の他の電動機は、回転自在に支承された回
転軸と、半径方向に磁力を発生するリング状の駆動用永
久磁石を有し、回転軸と一体になって回転する回転子と
、鉄心に複数のコイルが巻かれ駆動用永久磁石との磁気
的作用で回転子に回転力を発生させる回転子の外側に配
置された固定子とを備えたもので、基板等のフレームま
たは固定子の鉄心の一部に形成した突出部により固定子
の回転子に対する軸方向の相対位置を規定するようにし
たものである。Another electric motor of the present invention includes a rotatably supported rotary shaft, a ring-shaped driving permanent magnet that generates magnetic force in the radial direction, and a rotor that rotates integrally with the rotary shaft. It is equipped with a stator placed outside the rotor, which has multiple coils wound around an iron core and generates rotational force in the rotor through magnetic interaction with a driving permanent magnet. The relative position of the stator with respect to the rotor in the axial direction is defined by a protrusion formed on a part of the iron core.
[作用]
この発明においては、いずれも固定子の回転子に対する
軸方向位置または中心線方向位置が突出部により規定さ
れ、精度良く回転子と固定子との相対位置を決めること
ができるようになる。[Operation] In the present invention, the axial position or centerline position of the stator with respect to the rotor is defined by the protrusion, and the relative position between the rotor and the stator can be determined with high precision. .
[実施例]
第1図と第2図はいずれも本発明の一実施例としての、
回転子が固定子の内側にあって回転軸とともに回転する
内回転型と称される電動機である。第1図と第2図にお
いて、回転軸1を回転可能に中心に支承している軸受体
2は固定子3の取付けられた平板状の金属製基板よりな
るモータフレーム4に垂立状態に嵌合固定されている。[Example] FIG. 1 and FIG. 2 both show an example of the present invention.
This is an electric motor called an internal rotation type in which the rotor is located inside the stator and rotates together with the rotating shaft. In FIGS. 1 and 2, a bearing body 2 that rotatably supports a rotating shaft 1 in the center is vertically fitted into a motor frame 4 made of a flat metal substrate to which a stator 3 is attached. Fixed.
固定子3はスペーサ5により軸方向位置を調整されてモ
ータフレーム4上の軸受体2と同心位置に固定され、そ
の鉄心3aの内側には複数個のコイル6が巻装されてい
る。固定子3のモータフレーム4に対する固定は、モー
タフレーム4の鉄心3aの最外周径の位置に一体に形成
した周方向に間隔を持つ複数個の突出部7への鉄心3a
の外径部の圧入により行われている。コイル6は、鉄心
3aの内周を等分して得られた鉄心歯に対して巻装され
、回倒では連続した数個分の鉄心歯に相当する鉄心3a
の内径部分は橋絡部3bとして形成されている。即ち、
鉄心3aのコイル6の欠如した部分の外周は内周に向か
って後退した凹部3Cとして形成されている。この固定
子3の内側には、強磁性材金属よりなるリング状のロー
タヨーク8か、回転軸1に圧入されたハブに一体化され
てなる回転子9が配設され、そのロータヨーク8の固定
子3の内周面に対向する外周面にはリング状に形成され
た駆動用永久磁石10が装着されている。The stator 3 has its axial position adjusted by a spacer 5 and is fixed in a coaxial position with the bearing body 2 on the motor frame 4, and a plurality of coils 6 are wound inside the iron core 3a. The stator 3 is fixed to the motor frame 4 by fixing the iron core 3a to a plurality of protrusions 7 that are integrally formed at the outermost diameter position of the iron core 3a of the motor frame 4 and spaced apart in the circumferential direction.
This is done by press-fitting the outer diameter part of the The coil 6 is wound around the core teeth obtained by equally dividing the inner circumference of the core 3a, and when turned, the core 3a corresponding to several consecutive core teeth is wound.
The inner diameter portion is formed as a bridge portion 3b. That is,
The outer periphery of the portion of the iron core 3a where the coil 6 is missing is formed as a recessed portion 3C that recedes toward the inner periphery. Inside the stator 3, a ring-shaped rotor yoke 8 made of ferromagnetic metal or a rotor 9 integrated with a hub press-fitted into the rotating shaft 1 is disposed, and the stator of the rotor yoke 8 A ring-shaped driving permanent magnet 10 is mounted on the outer circumferential surface opposite to the inner circumferential surface of the magnet 3 .
上記構成の電動機の磁気記録装置への適用では、モータ
フレーム4に取付は部材等を介して固定した支持軸に摺
動部材により磁気ヘッド(図示しない)を直線運動可能
に設ける。この時、磁気ヘッドの移動線を鉄心3aの凹
部3cに一致させ、回転子9.固定子3及び磁気ヘッド
をほぼ同一面内に配置する。これにより、磁気記録装置
の薄型化か容易に達成することができる。In applying the above-described electric motor to a magnetic recording device, a magnetic head (not shown) is provided on a support shaft fixed to the motor frame 4 via a member or the like so as to be linearly movable by means of a sliding member. At this time, the moving line of the magnetic head is aligned with the recess 3c of the iron core 3a, and the rotor 9. The stator 3 and the magnetic head are arranged substantially in the same plane. Thereby, it is possible to easily achieve a thinner magnetic recording device.
そして、組立においては、固定子3の回転子9に対する
径方向位置が突出部7により規定され、回転子9と固定
子3との合心性がえ易く、精度良く回転子9と固定子3
との相対位置を決めることができる。During assembly, the radial position of the stator 3 with respect to the rotor 9 is defined by the protrusion 7, so that alignment between the rotor 9 and the stator 3 can be easily achieved, and the rotor 9 and the stator 3 can be accurately aligned.
The relative position can be determined.
第3図〜第18図は、いずれも回転子つと固定子3との
径方向の相対位置を決めるための他の実施例を示したも
のである。3 to 18 show other embodiments for determining the relative position of the rotor 3 and the stator 3 in the radial direction.
第3図に示したものは鉄心3aの一部を折り曲げて形成
した脚状の突出部7aを鉄心3aの外周に設け、この突
出部7aの先端側をモータフレーム4に形成した嵌合孔
11に嵌合させ、スペーサ5を挟んて鉄心3aをモータ
フレーム4にねじ12により固定したちのである。The one shown in FIG. 3 has a leg-shaped protrusion 7a formed by bending a part of the iron core 3a on the outer periphery of the iron core 3a, and a fitting hole 11 formed in the motor frame 4 at the tip end of the protrusion 7a. Then, the iron core 3a is fixed to the motor frame 4 with the screws 12 with the spacer 5 in between.
第4図は第1図及び第2図に示した実施例によるものの
圧入による鉄心3aの固定を上記実施例と同様にスペー
サ5を挟んてモータフレーム4にねし12により固定し
たものである。FIG. 4 shows the embodiment shown in FIGS. 1 and 2 in which the iron core 3a is fixed by press fitting to the motor frame 4 with a screw 12 with a spacer 5 in between, as in the above embodiment.
第5図〜第10図に示したものは、いずれもモータフレ
ーム4の鉄心3aの最外周径の位置と内周径の位置の双
方にそれぞれ一体に形成した周方向に間隔を持つ複数個
の内外二様の突出部7,7bにより鉄心3aの位置規定
を行い、突出部7,7bへの圧入またはモータフレーム
4へのねじ付けにより固定子3を固定したものである。5 to 10 each have a plurality of holes spaced apart in the circumferential direction that are integrally formed at both the outermost circumferential diameter position and the inner circumferential diameter position of the iron core 3a of the motor frame 4. The position of the iron core 3a is defined by the protrusions 7, 7b, which are arranged on the inside and outside, and the stator 3 is fixed by being press-fitted into the protrusions 7, 7b or screwed onto the motor frame 4.
第11図〜第13図は上記各実施例におけるスペーサ5
の機能を、モータフレーム4の一部に切り起こしにより
形成した突出部7C5または鉄心3aのモータフレーム
4側の面に一体に構成した突出部7d、または鉄心3a
の一部の折り曲げにより形成した脚状の突出部3eによ
りそれぞれ果たさせたもので、別部品のスペーサ5を必
要とすることなく固定子3の中心線方向位置の規定を行
うことができる。Figures 11 to 13 show spacers 5 in each of the above embodiments.
A protrusion 7C5 formed by cutting and raising a part of the motor frame 4, a protrusion 7d integrally formed on the motor frame 4 side surface of the iron core 3a, or the iron core 3a.
The position of the stator 3 in the center line direction can be determined without requiring the spacer 5 as a separate part.
さらに第14図〜第17図は、固定子3の径方向位置の
規定と軸方向位置の規定とを並列的に行うようにした実
施例を示している。第14図は、モータフレームに突出
部7fを設け、この突出部7fの先端側が嵌合する有底
孔13を固定子3の鉄心3aに設け、突出部7fの有底
孔13への嵌合により固定子3の径方向位置の規定と軸
方向位置の規定とを行ったものである。Furthermore, FIGS. 14 to 17 show an embodiment in which the radial position and axial position of the stator 3 are determined in parallel. FIG. 14 shows that a protrusion 7f is provided on the motor frame, a bottomed hole 13 into which the tip of the protrusion 7f fits is provided in the iron core 3a of the stator 3, and the protrusion 7f is fitted into the bottomed hole 13. Accordingly, the radial position and axial position of the stator 3 are defined.
また、第15図は、鉄心3aの一部を折り曲げて形成し
た脚状の突出部7gをモータフレーム4に設けた嵌合孔
14に嵌合させて上記実施例と同様に固定子3の径方向
位置の規定と軸方向位置の規定とを行ったもので、突出
部7gの嵌合側には第16図や第17図のように嵌合深
さを制限する段部15が形成されている。Further, FIG. 15 shows that the leg-shaped protrusions 7g formed by bending a part of the iron core 3a are fitted into the fitting holes 14 provided in the motor frame 4, and the diameter of the stator 3 is The directional position and axial position are defined, and a stepped portion 15 is formed on the fitting side of the protrusion 7g to limit the fitting depth as shown in FIGS. 16 and 17. There is.
第18図はスペーサ5にモータフ−レム4と鉄心3aに
それぞれ嵌合する突部16,17を一体に設けたもので
、スペーサ5で固定子3の軸方向位置と径方向位置の双
方が規定される構成である。In FIG. 18, a spacer 5 is integrally provided with protrusions 16 and 17 that fit into the motor lem 4 and the iron core 3a, respectively, and the spacer 5 defines both the axial and radial positions of the stator 3. This is the configuration that will be used.
[発明の効果]
以上、実施例による説明からも明らかなように本発明に
よれば、固定子の回転子に対する径方向位置が突出部に
より規定され、回転子と固定子との合心性が得やすく、
精度良く回転子と固定子との相対位置を決めることがで
きる効果か得られる。[Effects of the Invention] As is clear from the description of the embodiments, according to the present invention, the radial position of the stator with respect to the rotor is defined by the protrusion, and concentricity between the rotor and the stator is achieved. Easy,
This provides the effect of being able to determine the relative position of the rotor and stator with high precision.
また他の発明によれば、固定子の回転子に対する軸方向
位置が突出部により規定され、精度良く回転子と固定子
との相対位置を決めることができ、別部品のスペーサが
不要で部品点数を削減できる効果かえられ、いずれも磁
気記録装置の薄型化に貢献てきる電動機となる。According to another invention, the axial position of the stator relative to the rotor is defined by the protrusion, and the relative position of the rotor and stator can be determined with high precision, eliminating the need for a separate spacer and reducing the number of parts. This results in an electric motor that can contribute to making magnetic recording devices thinner.
第1図は本発明の一実施例としての電動機を示す断面図
、第2図は同じくその平面図、第3図と第4図はそれぞ
れ本発明の他の実施例を示す電動機の要部の断面図、第
5図は本発明の他の実施例を示す電動機の要部の断面図
、第6図は第5図の電動機の要部の平面図、第7図は本
発明の他の実施例を示す電動機の要部の断面図、第8図
は第7図の電動機の要部の平面図、第9図は本発明の他
の実施例を示す電動機の要部の断面図、第10図は第9
図の電動機の要部の平面図、第11図と第12図と第1
3図はそれぞれ本発明の他の実施例を示す電動機の要部
の断面図、第14図と第15図はそれぞれ本発明の他の
実施例を示す電動機の要部の断面図、第16図と第17
図はそれぞれ第15図におけるA矢印部の説明図、第1
8図は本発明の他の実施例を示す電動機の要部の断面図
、第19図は従来の電動機の断面図である。図において
、lは回転軸、3は固定子、3aは鉄心、4はモータフ
レーム、5はスペーサ、6はコイル、7,7a、7b、
7c、7d、7f、7gは突出部、8はロータヨーク、
9は回転子、10は駆動用永久磁石、11.14は嵌合
孔、13は有底孔である。なお、図中同一符号は、同−
又は相当部分を示す。
代理人 大 岩 増 雄(他2名)
r回転軸
第3図
第4図
/
9・l111転与
第
図
7b突出軒
第
図
第
図
第
図
第
!3
図
第
1+1
7f費出HF
2、発明の名称
3.補正をする者
図
第19図
補 正 書(自発)
平成
−NMl&:2年]O+2日
動
機
5 補正の対象
(2)明細書の発明の詳細な説明の欄。
(3)図面。
6 補正の内容
(1)明細書の第3頁19行目から第4頁第1行目まで
の「インデックス検出用磁石の磁束をインテンクス検出
素子て」の記載を「駆動用永久磁石の界磁を磁気センサ
ーて」と補正する。
(2)、明細書の第6頁第4行目の「中心線方向位置」
の記載を「径方向位置」と補正する。
(3)1図面における第18図を別紙のとおり補正する
。
以上Fig. 1 is a sectional view showing an electric motor as an embodiment of the present invention, Fig. 2 is a plan view thereof, and Figs. 3 and 4 are main parts of the electric motor showing other embodiments of the invention. 5 is a sectional view of the main parts of the electric motor showing another embodiment of the present invention, FIG. 6 is a plan view of the main parts of the motor shown in FIG. 5, and FIG. 7 is another embodiment of the invention. 8 is a plan view of the main parts of the motor shown in FIG. 7; FIG. 9 is a sectional view of the main parts of the motor showing another embodiment of the present invention; FIG. The figure is number 9
Plan views of the main parts of the electric motor shown in Figures 11, 12, and 1.
3 is a sectional view of a main part of an electric motor showing other embodiments of the present invention, FIGS. 14 and 15 are sectional views of main parts of a motor showing other embodiments of the invention, respectively, and FIG. and the 17th
The figures are an explanatory diagram of the A arrow part in Fig. 15, and the 1st
FIG. 8 is a sectional view of essential parts of a motor showing another embodiment of the present invention, and FIG. 19 is a sectional view of a conventional motor. In the figure, l is a rotating shaft, 3 is a stator, 3a is an iron core, 4 is a motor frame, 5 is a spacer, 6 is a coil, 7, 7a, 7b,
7c, 7d, 7f, 7g are protrusions, 8 is a rotor yoke,
9 is a rotor, 10 is a driving permanent magnet, 11.14 is a fitting hole, and 13 is a bottomed hole. Note that the same symbols in the figures refer to the same numbers.
or a corresponding portion. Agent Masuo Oiwa (and 2 others) r Rotating axis Figure 3 Figure 4 / 9/l111 Transfer Figure 7b Projecting eaves Figure Figure Figure! 3 Figure 1+1 7f Expenditure HF 2. Title of the invention 3. Figure 19 of the person making the amendment Written amendment (voluntary) Heisei-NMl &: 2 years] O+2 days Motive 5 Subject of amendment (2) Column for detailed explanation of the invention in the specification. (3) Drawings. 6. Contents of the amendment (1) From page 3, line 19 to page 4, line 1 of the specification, the statement ``The magnetic flux of the index detection magnet is changed to the intensity detection element'' has been changed to ``the field of the driving permanent magnet.'' The magnetic sensor corrects it. (2) "Position in center line direction" on page 6, line 4 of the specification
The description of is corrected to "radial position". (3) Figure 18 in one drawing will be corrected as shown in the attached sheet. that's all
Claims (2)
力を発生するリング状の駆動用永久磁石を有し、上記回
転軸と一体になって回転する回転子と、鉄心に複数のコ
イルが巻かれ上記駆動用永久磁石との磁気的作用で上記
回転子に回転力を発生させる上記回転子の外側において
基板等のフレームに固定された固定子とを備えた電動機
において、上記固定子または固定子を固定する固定相手
側の何れかまたは双方に一体に設けた突出部によって上
記固定子の上記回転子に対する径方向の相対位置を規定
したことを特徴とする電動機。(1) A rotor that has a rotatably supported rotary shaft, a ring-shaped driving permanent magnet that generates magnetic force in the radial direction, and rotates integrally with the rotary shaft, and a plurality of rotors on an iron core. In an electric motor, a stator is fixed to a frame such as a substrate on the outside of the rotor, and the stator has a coil wound thereon and generates rotational force on the rotor through magnetic interaction with the driving permanent magnet. Alternatively, an electric motor characterized in that the relative position of the stator with respect to the rotor in the radial direction is defined by a protrusion integrally provided on one or both of the fixing partners to which the stator is fixed.
力を発生するリング状の駆動用永久磁石を有し、上記回
転軸と一体になつて回転する回転子と、複数のコイルが
巻かれ上記駆動用永久磁石との磁気的作用で上記回転子
に回転力を発生させる上記回転子の外側において基板等
のフレームに固定された固定子とを備えた電動機におい
て、上記基板等のフレームまたは上記固定子の鉄心に、
上記固定子の上記回転子に対する軸方向の相対位置を規
定する突出部を形成したことを特徴とする電動機。(2) A rotor that has a rotatably supported rotary shaft, a ring-shaped driving permanent magnet that generates magnetic force in the radial direction, and rotates integrally with the rotary shaft, and a plurality of coils. In an electric motor, a stator is fixed to a frame such as a substrate on the outside of the rotor and generates a rotational force in the rotor by magnetic action with the permanent magnet for driving. Or to the iron core of the stator above,
An electric motor characterized in that a protrusion is formed to define a relative position of the stator with respect to the rotor in an axial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2176763A JPH0467755A (en) | 1990-07-04 | 1990-07-04 | Motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2176763A JPH0467755A (en) | 1990-07-04 | 1990-07-04 | Motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0467755A true JPH0467755A (en) | 1992-03-03 |
Family
ID=16019390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2176763A Pending JPH0467755A (en) | 1990-07-04 | 1990-07-04 | Motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0467755A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5747908A (en) * | 1994-08-05 | 1998-05-05 | Matsushita Electric Industrial Co., Ltd. | Motor including an apparatus for mounting a rotor and stator coil to a printed circuit board |
JP2007043784A (en) * | 2005-08-01 | 2007-02-15 | Nippon Densan Corp | Spindle motor and recording disc mounting it |
US7760464B2 (en) * | 2005-09-08 | 2010-07-20 | Seagate Technology Llc | Base for data storage device with parallelism mounting features |
-
1990
- 1990-07-04 JP JP2176763A patent/JPH0467755A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5747908A (en) * | 1994-08-05 | 1998-05-05 | Matsushita Electric Industrial Co., Ltd. | Motor including an apparatus for mounting a rotor and stator coil to a printed circuit board |
JP2007043784A (en) * | 2005-08-01 | 2007-02-15 | Nippon Densan Corp | Spindle motor and recording disc mounting it |
US7760464B2 (en) * | 2005-09-08 | 2010-07-20 | Seagate Technology Llc | Base for data storage device with parallelism mounting features |
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