JPH0510550Y2 - - Google Patents
Info
- Publication number
- JPH0510550Y2 JPH0510550Y2 JP1986058095U JP5809586U JPH0510550Y2 JP H0510550 Y2 JPH0510550 Y2 JP H0510550Y2 JP 1986058095 U JP1986058095 U JP 1986058095U JP 5809586 U JP5809586 U JP 5809586U JP H0510550 Y2 JPH0510550 Y2 JP H0510550Y2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- cylindrical portion
- rotating shaft
- bearing
- magnetic disk
- 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
- 230000005405 multipole Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000003825 pressing Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 101000606504 Drosophila melanogaster Tyrosine-protein kinase-like otk Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
Landscapes
- Brushless Motors (AREA)
- Motor Or Generator Frames (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はブラシレスモータに関する。[Detailed explanation of the idea] [Industrial application field] The present invention relates to a brushless motor.
一般に、円筒部を有するハウジングと、該ハウ
ジングの円筒部に２個の軸受を介して回転自在に
枢支される回転軸と、該回転軸を介して上記ハウ
ジングに回転自在として取付けられると共に多極
着磁されたロータマグネツトと、該ハウジングに
固着されるステータと、を備えたブラシレスモー
タにおいて、軸受と、ハウジングの円筒部との間
に、材質が異なることによる熱膨脹差（例えば、
軸受の材質が炭素鋼の場合その熱膨脹係数は10×
10-6／deg、ハウジングはアルミダイキヤストが
一般でありその熱膨脹係数は23×10-6／degであ
る）により僅かな隙間が発生する。この僅かな隙
間のために、回転軸にがたつきが生じる。従つ
て、このブラシレスモータに磁気デイスク等が取
付けられている場合、該磁気デイスク上のトラツ
クに対する磁気ヘツドによる情報の書込み・読出
しに誤動作（位置の狂いやオフトラツク等）が発
生するという問題が生じ、この対策として、従来
では、一方向のみに回転軸を傾倒させるべく、コ
イルバネや板バネでもつて回転軸の一方の軸受外
周面を押圧して、ハウジングの円筒部の内周面の
ある１定点に軸受が常に当接するように設定し、
回転軸のがたつきを生じないようにしていた。し
かしながら、１点のみの押圧構造であるため回転
軸の傾倒方向が定まりにくく、不安定さがあり、
回転軸のがたつきが解消されるに至つていない。
Generally, a housing has a cylindrical portion, a rotating shaft rotatably supported on the cylindrical portion of the housing via two bearings, and a multi-pole rotary shaft rotatably attached to the housing via the rotating shaft. In a brushless motor equipped with a magnetized rotor magnet and a stator fixed to the housing, there is a difference in thermal expansion between the bearing and the cylindrical part of the housing due to different materials (for example,
If the material of the bearing is carbon steel, its coefficient of thermal expansion is 10×
10 -6 /deg, the housing is generally made of aluminum die-cast and its coefficient of thermal expansion is 23×10 -6 /deg), so a small gap occurs. This small gap causes the rotating shaft to wobble. Therefore, when a magnetic disk or the like is attached to this brushless motor, a problem arises in that malfunctions (misalignment, off-track, etc.) occur when the magnetic head writes and reads information to and from tracks on the magnetic disk. Conventionally, as a countermeasure for this, in order to tilt the rotating shaft in only one direction, a coil spring or a plate spring is used to press the outer peripheral surface of one of the bearings of the rotating shaft, and the shaft is tilted at a fixed point on the inner peripheral surface of the cylindrical part of the housing. Set so that the bearings are always in contact,
This was done to prevent rattling of the rotating shaft. However, since it has a pressing structure with only one point, it is difficult to determine the direction in which the rotating shaft is tilted, resulting in instability.
The rattling of the rotating shaft has not yet been resolved.
本考案ではこのような従来の問題点を解決し
て、回転軸にがたつきが生じないブラシレスモー
タを提供することを目的とする。 The present invention aims to solve these conventional problems and provide a brushless motor that does not cause rattling in the rotating shaft.
本考案は、円筒部を有するハウジングと、該ハ
ウジングの円筒部に、２個の軸受けを介して回転
自在に枢支される回転軸と、該回転軸を介して上
記ハウジングに回転自在として取付けられると共
に、多極着極されたロータマグネツトを有するロ
ータホルダと、磁気デイスクが搭載されると共に
上記回転軸に固着される磁気デイスク取付盤と、
上記ハウジングに固着されると共に、コイルが巻
設されるステータと、を備えたブラシレスモータ
において、磁気ヘツドを通る磁気デイスクの中心
線に対して直交する中心線方向に、上記軸受けの
どちらか一方の外周面を弾発付勢する弾発部材
を、上記ハウジングの円筒部に設け、さらに、該
円筒部の内周面に逃げ用凹部を形成し、該弾発部
材の弾発付勢力を、該軸受けを介して該凹部のエ
ツジにて受けるようにした。
The present invention includes a housing having a cylindrical portion, a rotating shaft rotatably supported on the cylindrical portion of the housing via two bearings, and a rotating shaft rotatably attached to the housing via the rotating shaft. a rotor holder having a multi-polarized rotor magnet; a magnetic disk mounting board on which a magnetic disk is mounted and fixed to the rotating shaft;
In the brushless motor, the stator is fixed to the housing and has a coil wound thereon, and the stator is fixed to the housing and has a coil wound thereon. A resilient member that resiliently biases the outer circumferential surface is provided in the cylindrical portion of the housing, and an escape recess is formed in the inner peripheral surface of the cylindrical portion, so that the resilient biasing force of the resilient member is applied to the resilient member. It was adapted to be received at the edge of the recess via a bearing.
熱膨張差により、軸受とハウジング円筒部との
間に、隙間が生じようとしたとき、弾発部材が、
磁気ヘツドを通る磁気デイスクの中心線に対して
直交する中心線方向に、デイスク取付盤が僅かに
傾くように、回転軸を押圧する。
When a gap is about to form between the bearing and the cylindrical part of the housing due to the difference in thermal expansion, the elastic member
The rotating shaft is pressed so that the disk mounting plate is slightly tilted in the direction of the center line perpendicular to the center line of the magnetic disk passing through the magnetic head.
以下、実施例を示す図面に基づいて本考案を詳
説する。
Hereinafter, the present invention will be explained in detail based on drawings showing embodiments.
第１図において、１は本考案に係るブラシレス
モータであつて、円筒部２を有するアルミニウム
等の非磁性体からなるハウジング３と、該ハウジ
ング３の円筒部２に２個の軸受４ａ，４ｂを介し
て回転自在に枢支される回転軸５と、該回転軸５
を介して上記ハウジング３に回転自在として取付
けられるロータホルダ６と、上記ハウジング３に
固着されると共にコイル７が巻設されたステータ
８と、を備え、磁気デイスク９……を有する磁気
デイスク取付盤１０が該回転軸５の上端に取付け
られている。 In FIG. 1, reference numeral 1 denotes a brushless motor according to the present invention, which includes a housing 3 made of a non-magnetic material such as aluminum and having a cylindrical portion 2, and two bearings 4a and 4b mounted on the cylindrical portion 2 of the housing 3. a rotating shaft 5 rotatably supported via the rotating shaft 5;
A magnetic disk mounting board 10 comprising a rotor holder 6 rotatably attached to the housing 3 via a stator 8 fixed to the housing 3 and having a coil 7 wound thereon, and having magnetic disks 9... is attached to the upper end of the rotating shaft 5.
１１はアクセスアーム、１２……はアクセスア
ーム１１の先端に取付けられた磁気ヘツドであ
り、磁気デイスク９……の情報の書込み・読出し
を行なうものである。 11 is an access arm, and 12... is a magnetic head attached to the tip of the access arm 11, which writes and reads information on the magnetic disks 9....
しかして、上記ハウジング３は、円筒部２と、
該円筒部２の外周面から外鍔状に大きく突設され
たハウジングフランジ１３と、からなり、また、
ロータホルダ６は、外周に立上り部１４を有する
円盤体からなり、その略中央部に、上記回転軸５
の下端が固着されて回転自在とされる。そして、
立上り部１４には、周方向に沿つてＮ極・Ｓ極が
順次着磁されたロータマグネツト１５が固着され
ている。また、ステータ８は上記ロータマグネツ
ト１５の内側に近接対峙する複数本のテイースを
備えた薄板状のステータラミネーシヨン１６が、
複数枚重合積層されて形成され、その軸心孔１７
が上記ハウジング３の円筒部２に嵌合される。そ
して、図示省略のホール素子、ホールIC等から
なるロータ位置検出器にて、ロータマグネツト１
５の回転位置を検出し、さらに該検出器からの回
転位置検出信号に基づいて上記ステータ８のコイ
ル７への通電が切換制御され、このブラシレスモ
ータは回転する。 Therefore, the housing 3 includes the cylindrical portion 2 and
It consists of a housing flange 13 that protrudes greatly from the outer peripheral surface of the cylindrical portion 2 in the shape of an outer flange, and
The rotor holder 6 is made of a disc body having a rising portion 14 on its outer periphery, and the rotary shaft 5
The lower end is fixed so that it can rotate freely. and,
A rotor magnet 15 is fixed to the rising portion 14, and the N-pole and the S-pole are sequentially magnetized along the circumferential direction. Further, the stator 8 has a thin plate-like stator lamination 16 having a plurality of teeth facing each other in close proximity to the inside of the rotor magnet 15.
It is formed by laminating a plurality of sheets, and its axial hole 17
is fitted into the cylindrical portion 2 of the housing 3. Then, a rotor position detector consisting of a Hall element, Hall IC, etc. (not shown) detects the rotor magnet 1.
The rotational position of the stator 8 is detected, and the energization of the coil 7 of the stator 8 is switched based on the rotational position detection signal from the detector, and the brushless motor rotates.
１８はハウジング３の円筒部２の上端内周面に
付設された磁性液体シールであり、回転軸５の回
転時に、軸受４，４のグリース等が霧状に磁気デ
イスク実装側に侵入したり、空気中の微細なゴミ
や埃が磁気デイスク実装側に侵入するのを防止す
る。１９はハウジング３の円筒部２の上端に冠着
された磁気シールドカバー材であり、磁気デイス
ク９と磁気ヘツド１２への磁界の影響を有効に遮
断すると共に、微細なゴミや埃がハウジング３の
円筒部内に侵入するのを防止する。２０はハウジ
ングフランジ１３の裏面１３ａに付着された磁気
シールド薄板であり、情報の書込みと読出しを行
う磁気ヘツド１２の近傍への磁界の影響を有効に
遮断する。 18 is a magnetic liquid seal attached to the inner peripheral surface of the upper end of the cylindrical portion 2 of the housing 3, and when the rotating shaft 5 rotates, the grease etc. of the bearings 4, 4 enters the magnetic disk mounting side in the form of mist. To prevent minute dirt and dust in the air from entering the magnetic disk mounting side. Reference numeral 19 denotes a magnetic shield cover material attached to the upper end of the cylindrical portion 2 of the housing 3, which effectively blocks the influence of the magnetic field on the magnetic disk 9 and the magnetic head 12, and prevents fine dirt and dust from forming on the housing 3. Prevent it from entering the cylindrical part. Reference numeral 20 denotes a magnetic shield thin plate attached to the back surface 13a of the housing flange 13, which effectively blocks the influence of magnetic fields in the vicinity of the magnetic head 12 where information is written and read.
しかして、上記軸軸受４ａ，４ｂのうち前側
（回転軸５の磁気デイスク９側を前方、ロータホ
ルダ６側を後方と定義する）の軸受４ａは、内輪
２１、外輪２２共に回転軸５とハウジング３の円
筒部２の内周面２３に接着又は圧入等にて夫々固
定され、他方後側の軸受４ｂは、内輪２４が回転
軸５と接着又は圧入等にて固定されるが、外輪２
５と円筒部２とは微小な隙間による遊嵌乃至緩嵌
の関係とされている。即ち、回転軸５の材質とし
ては一般的にステンレス鋼が用いられるので、該
ハウジングの熱膨脹率と回転軸５の熱膨脹率の差
による軸心方向の熱膨脹差に対応すべくなされて
いる。さらに、前側軸受４ａの外輪２２と後側軸
受４ｂの外輪２５との間にはコイルスプリング２
６が介装されて後側軸受４ｂの外輪２５を常時矢
印Ａ方向に弾発付勢し、振動及び騒音を防ぎ、回
転軸５を円滑に回転するようになされている。 Of the shaft bearings 4a and 4b, the front bearing 4a (the magnetic disk 9 side of the rotating shaft 5 is defined as the front and the rotor holder 6 side is defined as the rear) has an inner ring 21, an outer ring 22, and a housing 3. The inner ring 24 of the rear bearing 4b is fixed to the inner circumferential surface 23 of the cylindrical portion 2 by adhesive or press fit, respectively.The inner ring 24 of the rear bearing 4b is fixed to the rotating shaft 5 by adhesive or press fit.
5 and the cylindrical portion 2 are in a loosely fitting relationship with a small gap. That is, since stainless steel is generally used as the material for the rotating shaft 5, this is done to accommodate the difference in thermal expansion in the axial direction due to the difference in the coefficient of thermal expansion of the housing and the coefficient of thermal expansion of the rotating shaft 5. Further, a coil spring 2 is provided between the outer ring 22 of the front bearing 4a and the outer ring 25 of the rear bearing 4b.
6 is interposed to constantly bias the outer ring 25 of the rear bearing 4b in the direction of arrow A, prevent vibration and noise, and ensure smooth rotation of the rotating shaft 5.
しかして、上記ハウジング３の円筒部２には、
後側軸受４ｂの外周面を一定方向に弾発付勢する
弾発部材２７が設けられている。具体的には、弾
発部材２７は、第３図に示す如く円弧状の取付部
２８の内周側１箇所から内側傾斜状に上方へ押圧
弾性片２９を折曲形成してなる板バネからなり、
該取付部２８をハウジング３の円筒部２端面に、
ビス３１にて取付け、外押圧弾性片２９を軸受４
ｂの外輪２５の外周面に当接させている。３２は
ビス３１が挿通される取付孔である。また、円筒
部２端面に対する弾発部材２７の取付位置は、第
２図に示す如く、磁気ヘツド１２を通る磁気デイ
スク９の中心線Ｂに対して直交する中心線Ｃ方向
に、押圧弾性片２９の弾発付勢力ｆによる押圧力
Ｆが発生する位置とされる。３０は上記弾発部材
２７の略対称位置の円筒部２の内周面２３に形成
される逃げ用凹部であつて、そのエツジ３３，３
３にて押圧力Ｆを受けるようにしている。つま
り、ステンレス鋼又は炭素鋼からなる軸受４ｂと
アルミニウム製ハウジング３との径方向の熱膨脹
差により、該軸受４ｂの外周面と円筒部２の内周
面２３との間に隙間が発生しようとするときに、
回転軸５が、弾発部材２７により軸受４ｂを介し
て中心線Ｃ上の一方向に力Ｆでもつて押圧され、
軸受４ａ近傍を中心として傾倒（極僅かな角度で
ある）される。従つて、この傾倒は常に一方向に
限られるので、磁気デイスク９に傾きが生じても
磁気ヘツド１２と磁気デイスク９との距離関係に
大きく変化を生せず、磁気ヘツド１２は磁気デイ
スク９上にトラツクに対する書込みミスや読取り
ミス等の動作ミスを起こすことがない。また、こ
の場合、軸受４ｂはエツジ３３，３３の２点で支
持されることになるので、力Ｆの方向を正確に中
心線Ｃ上の一方向とすることができ、回転軸５は
がたつかず常になめらかに回転する。なお、この
逃げ用凹部３０は切削加工せずに、ハウジング３
を製造するときに、ダイキヤスト等の鋳込み又は
鍛造にて形成する。３４はハウジング３の円筒部
２の内周面２３に形成された押圧弾性片２９の逃
げ用凹部である。 Therefore, in the cylindrical portion 2 of the housing 3,
A resilient member 27 is provided that resiliently biases the outer circumferential surface of the rear bearing 4b in a certain direction. Specifically, as shown in FIG. 3, the resilient member 27 is made of a plate spring formed by bending a pressing elastic piece 29 upward in an inwardly inclined manner from one location on the inner circumferential side of an arcuate mounting portion 28. Become,
The mounting portion 28 is attached to the end surface of the cylindrical portion 2 of the housing 3,
Attach with screw 31 and attach external pressing elastic piece 29 to bearing 4.
It is brought into contact with the outer peripheral surface of the outer ring 25 of b. 32 is a mounting hole through which the screw 31 is inserted. As shown in FIG. 2, the mounting position of the resilient member 27 on the end surface of the cylindrical portion 2 is such that the pressing elastic piece 27 This is the position where a pressing force F is generated due to the rebound force f. Reference numeral 30 denotes an escape recess formed in the inner circumferential surface 23 of the cylindrical portion 2 at a substantially symmetrical position of the elastic member 27, and the edges 33, 3
3, the pressing force F is applied. In other words, due to the difference in thermal expansion in the radial direction between the bearing 4b made of stainless steel or carbon steel and the aluminum housing 3, a gap tends to occur between the outer peripheral surface of the bearing 4b and the inner peripheral surface 23 of the cylindrical portion 2. sometimes,
The rotating shaft 5 is pressed with a force F in one direction on the center line C by the resilient member 27 via the bearing 4b,
It is tilted (at a very small angle) around the vicinity of the bearing 4a. Therefore, since this tilting is always limited to one direction, even if the magnetic disk 9 is tilted, the distance relationship between the magnetic head 12 and the magnetic disk 9 will not change significantly, and the magnetic head 12 will not move over the magnetic disk 9. There is no possibility of operation errors such as writing errors or reading errors to the track. In addition, in this case, since the bearing 4b is supported at two points, the edges 33, 33, the direction of the force F can be accurately set in one direction on the center line C, and the rotating shaft 5 will not wobble. It always rotates smoothly. Note that this escape recess 30 is not cut into the housing 3.
When manufacturing, it is formed by casting such as die casting or forging. Reference numeral 34 denotes a recess for escape of the pressing elastic piece 29 formed on the inner circumferential surface 23 of the cylindrical portion 2 of the housing 3.
なお、本考案は上述の実施例に限定されず、本
考案の要旨を逸脱しない範囲で設計変更自由であ
り、例えば、前側軸受４ａの外輪２２とハウジン
グ３とを遊嵌乃至緩嵌状として該軸受４ａを弾発
付勢し、いわゆる上述の実施例とは逆の構成とす
るも可能であり、また、軸受４ｂに対する弾発付
勢箇所も周方向複数箇所とするも自由である。さ
らに、弾発部材２７を、板バネに代えて、ゴム又
はプラスチツク等からなる弾性材とするも、コイ
ルバネとするも好ましい。 Note that the present invention is not limited to the above-described embodiments, and the design may be changed without departing from the gist of the present invention. For example, the outer ring 22 of the front bearing 4a and the housing 3 may be loosely or loosely fitted. It is also possible to elastically bias the bearing 4a and have a configuration opposite to that of the above-described embodiment, and the bearing 4b may be elastically biased at a plurality of locations in the circumferential direction. Further, it is preferable that the resilient member 27 is made of an elastic material such as rubber or plastic, or a coil spring, instead of a plate spring.
本考案は上述の構成により、次のような著大な
効果を奏する。
The present invention has the following significant effects due to the above-described configuration.
熱膨張差によつて、軸受の外周面と、ハウジ
ング円筒部２の内周面２３との間に隙間が発生
しようとしたときに、回転軸５が、弾発部材２
７によつて、磁気ヘツド１２を通る磁気デイス
ク９の中心線Ｂに対して直交する中心線Ｃ方向
に、弾発的に押圧されて、他方の軸受を中心と
して僅かに傾倒する。 When a gap is about to occur between the outer circumferential surface of the bearing and the inner circumferential surface 23 of the housing cylindrical portion 2 due to the difference in thermal expansion, the rotating shaft 5
7, the magnetic disk 9 is elastically pressed in the direction of the center line C which is perpendicular to the center line B of the magnetic disk 9 passing through the magnetic head 12, and is slightly tilted about the other bearing.
この傾動の方向−中心線Ｃ方向−は、磁気ヘ
ツド１２と磁気デイスク９との距離関係をほと
んど変化させない。 The direction of this tilting - the direction of the center line C - hardly changes the distance relationship between the magnetic head 12 and the magnetic disk 9.
従つて、磁気ヘツド１２が磁気デイスク９の
トラツクに対して、書込ミスや読取ミス等の誤
動作を、起こすことが無い。 Therefore, the magnetic head 12 does not cause malfunctions such as writing errors or reading errors on the tracks of the magnetic disk 9.
しかも、軸受はエツジ３３，３３の２点支持
であるから、上述の中心線Ｃ方向へ正確に、か
つ、安定して、保持され、これに伴つて、回転
軸５はがたつかずに、常に滑らかに高精度な回
転をする。 Moreover, since the bearing is supported at two points at the edges 33, 33, it is held accurately and stably in the direction of the center line C mentioned above. Rotates smoothly and with high precision.
第１図は磁気デイスクが取付けられた状態の本
考案の一実施例を示す断面図、第２図は要部の底
面図、第３図は弾発部材の斜視図である。
２……円筒部、３……ハウジング、４……軸
受、５……回転軸、６……ロータホルダ、７……
コイル、８……ステータ、１５……ロータマグネ
ツト、２３……内周面、２７……弾発部材、３０
……逃げ用凹部、３３……エツジ、ｆ……弾発付
勢力。
FIG. 1 is a sectional view showing an embodiment of the present invention with a magnetic disk attached, FIG. 2 is a bottom view of the main part, and FIG. 3 is a perspective view of the resilient member. 2... Cylindrical part, 3... Housing, 4... Bearing, 5... Rotating shaft, 6... Rotor holder, 7...
Coil, 8... Stator, 15... Rotor magnet, 23... Inner peripheral surface, 27... Resilient member, 30
... Escape recess, 33... Edge, f... Bullet biasing force.
Claims (1)
グ３の円筒部２に、２個の軸受け４ａ，４ｂを介
して回転自在に枢支される回転軸５と、該回転軸
５を介して上記ハウジング３に回転自在として取
付けられると共に、多極着極されたロータマグネ
ツト１５を有するロータホルダ６と、磁気デイス
ク９が搭載されると共に上記回転軸５に固着され
る磁気デイスク取付盤１０と、上記ハウジング３
に固着されると共に、コイル７が巻設されるステ
ータ８と、を備えたブラシレスモータにおいて、 磁気ヘツド１２を通る磁気デイスク９の中心線
Ｂに対して直交する中心線Ｃ方向に、上記軸受け
４ａ，４ｂのどちらか一方の外周面を弾発付勢す
る弾発部材２７を、上記ハウジング３の円筒部２
に設け、さらに、該円筒部２の内周面２３に逃げ
用凹部３０を形成し、該弾発部材２７の弾発付勢
力ｆを、該軸受け４ｂを介して該凹部３０のエツ
ジ３３，３３にて受けるようにしたことを特徴と
するブラシレスモータ。[Claims for Utility Model Registration] A housing 3 having a cylindrical portion 2, a rotating shaft 5 rotatably supported on the cylindrical portion 2 of the housing 3 via two bearings 4a and 4b, and A rotor holder 6 which is rotatably attached to the housing 3 via a shaft 5 and has a multi-pole rotor magnet 15, and a magnetic disk on which a magnetic disk 9 is mounted and which is fixed to the rotating shaft 5. Mounting board 10 and the housing 3
In the brushless motor, the stator 8 is fixed to a stator 8 and has a coil 7 wound thereon. , 4b is attached to the cylindrical portion 2 of the housing 3.
Furthermore, an escape recess 30 is formed in the inner circumferential surface 23 of the cylindrical portion 2, and the resilient urging force f of the resilient member 27 is applied to the edges 33, 33 of the recess 30 via the bearing 4b. A brushless motor characterized by being adapted to be received at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986058095U JPH0510550Y2 (en) | 1986-04-17 | 1986-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986058095U JPH0510550Y2 (en) | 1986-04-17 | 1986-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62172273U JPS62172273U (en) | 1987-10-31 |
| JPH0510550Y2 true JPH0510550Y2 (en) | 1993-03-15 |
Family
ID=30888384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986058095U Expired - Lifetime JPH0510550Y2 (en) | 1986-04-17 | 1986-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510550Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2623873B2 (en) * | 1988-11-30 | 1997-06-25 | 富士電機株式会社 | Polygon scanner motor and method of manufacturing the same |
| TWI319256B (en) * | 2005-06-30 | 2010-01-01 | Delta Electronics Inc | Motor mechanism |
| KR200459859Y1 (en) * | 2010-07-01 | 2012-04-19 | 황진 | The bearing locking installation for the shaft |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5959059A (en) * | 1982-09-28 | 1984-04-04 | Secoh Giken Inc | Flat stationary armature implanted with cylindrical bearing |
| JPS59162757A (en) * | 1983-03-04 | 1984-09-13 | Secoh Giken Inc | Outside-rotor type motor with stationary armature implanted with cylindrical bearing |
-
1986
- 1986-04-17 JP JP1986058095U patent/JPH0510550Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5959059A (en) * | 1982-09-28 | 1984-04-04 | Secoh Giken Inc | Flat stationary armature implanted with cylindrical bearing |
| JPS59162757A (en) * | 1983-03-04 | 1984-09-13 | Secoh Giken Inc | Outside-rotor type motor with stationary armature implanted with cylindrical bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62172273U (en) | 1987-10-31 |
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