JPH0355177Y2 - - Google Patents
Info
- Publication number
- JPH0355177Y2 JPH0355177Y2 JP18907886U JP18907886U JPH0355177Y2 JP H0355177 Y2 JPH0355177 Y2 JP H0355177Y2 JP 18907886 U JP18907886 U JP 18907886U JP 18907886 U JP18907886 U JP 18907886U JP H0355177 Y2 JPH0355177 Y2 JP H0355177Y2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- stator
- hole
- stator core
- magnetic
- 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
Links
- 229920005989 resin Polymers 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002966 varnish Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004819 Drying adhesive Substances 0.000 description 1
- 229920001207 Noryl Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
- Brushless Motors (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、高密度容量のハードデイスクなどの
磁気デイスク駆動用ブラシレスモータに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a brushless motor for driving a magnetic disk such as a high-density capacity hard disk.
従来磁気デイスク装置は第３図のようにブラシ
レスモータで回転駆動される略カツプ状のハブ４
の外周に複数枚の高密度容量の情報信号記録媒体
の磁気デイスク１２が装着され、モータのハウジ
ング１には第３図、第４図のようにコイル５と磁
気センサー８の引き出し等の貫通透孔１ａ，１ｂ
があるため外気や粉塵がモータ内に、更には磁気
デイスク装置が装着されて磁気デイスクが密閉さ
れたハード磁気デイスク装置内に侵入することに
なり、装置内に外気が侵入すると、磁気デイスク
面の僅か上の0.2〜0.3μmに浮上して記録・再生を
行なう磁気ヘツドの浮上量が変動することになる
から何らかの封止手段が必要で、従来はコイル
５と磁気センサー８の引き出し貫通透孔１ａ，１
ｂ及びハウジング１と回路基板１８の間や回路基
板の下面をエポキシ樹脂系接着剤９等で固めて封
止されていた。更にステータコアは軸受ホルダ
ーに接着剤で固定するかネジでハウジング１に固
定されていた。又、ステータコア６よりの鉄粉
の発生を防止すると共にステータコアとコイル５
間のレアシヨートを防ぐためにはステータコア表
面にワニスを塗布し、ステータコアに巻線された
コイルの被覆が剥離しないようにワニスを塗布し
ていた。
A conventional magnetic disk device has a substantially cup-shaped hub 4 which is rotationally driven by a brushless motor as shown in Fig. 3.
A plurality of magnetic disks 12, which are high-density information signal recording media, are attached to the outer periphery of the motor housing 1, and the motor housing 1 has through-holes for drawing out the coil 5 and the magnetic sensor 8, etc., as shown in FIGS. 3 and 4. Holes 1a, 1b
Because of this, outside air and dust can enter the motor and even into the hard magnetic disk device in which the magnetic disk device is installed and the magnetic disk is sealed. If outside air enters the device, the surface of the magnetic disk may Since the flying height of the magnetic head, which flies to a slightly higher level of 0.2 to 0.3 μm for recording and reproduction, fluctuates, some kind of sealing means is required. ,1
b, the space between the housing 1 and the circuit board 18, and the lower surface of the circuit board were hardened and sealed with an epoxy resin adhesive 9 or the like. Further, the stator core was fixed to the bearing holder with adhesive or fixed to the housing 1 with screws. In addition, it prevents the generation of iron powder from the stator core 6, and also prevents the generation of iron powder from the stator core and coil 5.
Varnish was applied to the surface of the stator core to prevent rare shorts between the stator cores, and the varnish was applied to prevent the coating of the coils wound around the stator core from peeling off.
しかし、上記の接着剤の塗布との接着剤の
塗布とのワニスの塗布との作業を別々に行なわ
なくてはならず、１つ１つの作業が塗布及び乾燥
を要し、作業時間がかかるため、トータルすると
かなり長時間の作業時間が必要で面倒であると共
に作業効率が悪くコストアツプとなつていた。特
にワニスの塗布はべとつき、匂い等取り扱いが非
常に悪く、人手もかかつていた。 However, the above-mentioned adhesive application, adhesive application, and varnish application must be performed separately, and each work requires application and drying, which takes time. In total, this process required a considerable amount of time and was troublesome, as well as resulting in poor work efficiency and increased costs. In particular, the application of varnish was sticky, smelly, and difficult to handle, and required a lot of labor.
本考案は上記欠点に鑑み、モータ内への外気の
侵入封止及び防塵と、ステータコアの軸受ホルダ
ーへの固定と、コイル被覆の剥離の防止等を１つ
の工程及び処理で行ない、作業効率の向上を図つ
た磁気デイスク駆動用ブラシレスモータを提案す
ることである。
In view of the above-mentioned drawbacks, the present invention improves work efficiency by sealing the intrusion of outside air into the motor, preventing dust, fixing the stator core to the bearing holder, and preventing peeling of the coil coating in one process and treatment. The purpose of this invention is to propose a brushless motor for driving a magnetic disk.
本考案は、ロータに配設した駆動マグネツトに
ステータを対向配置し、かつ上記ステータをハウ
ジングに固定すると共に、上記ハウジングの少な
くとも上記駆動マグネツトの近傍に位置して磁気
センサー等を挿入するための透孔を穿設し、この
透孔から上記磁気センサーのリード端子等を導出
させたブラシレスモータにおいて、上記透孔と上
記ステータのコアの表面とを絶縁性樹脂により一
体成形し上記透孔の開口を封止してなることにあ
る。
In the present invention, a stator is disposed opposite to a drive magnet disposed on a rotor, the stator is fixed to a housing, and a transparent element is provided at least in the vicinity of the drive magnet in the housing for inserting a magnetic sensor or the like. In a brushless motor in which a hole is bored and lead terminals of the magnetic sensor are led out from the hole, the hole and the surface of the core of the stator are integrally molded with an insulating resin, and the opening of the hole is formed. It has to be sealed.
以下、図示の実施例で本考案を説明する。磁気
デイスク駆動用ブラシレスモータは第１図でアル
ミダイキヤストで形成された非磁性材からなるハ
ウジング１の中心にマルテンサイト系ステンレス
綱（sus403，sus420）又は軸受綱（suj2）で形成
された中空筒の軸受ホルダー２の下端が圧入固定
され、軸受ホルダー２の筒内に軸受１０，１１が
嵌められて回転軸３が支承されている。
The present invention will be explained below with reference to illustrated embodiments. As shown in Fig. 1, the brushless motor for driving a magnetic disk has a hollow cylinder made of martensitic stainless steel (sus403, sus420) or bearing steel (suj2) in the center of a housing 1 made of non-magnetic material made of die-cast aluminum. The lower end of the bearing holder 2 is press-fitted and fixed, and bearings 10 and 11 are fitted into the cylinder of the bearing holder 2 to support the rotating shaft 3.
上記回転軸３の上端にはアルミダイキヤストで
形成された非磁性材からなるハブ４が固定されて
外周部４ａに複数枚の磁気デイスク１２がスペー
サー１３を挟んで嵌められてフランジ４ｂ上に載
せられ、デイスククランプ１４がハブ４に螺合さ
れたネジ１５で固定されて磁気デイスク１２がハ
ブ４に固定されている。ハブ４には磁性材のヨー
ク１６がインサート成形され、かつヨーク１６の
内周面の一部が露出されて露出面には駆動マグネ
ツト１７が直接固着されて効率のよい磁気回路が
形成され、ハブ４とヨーク１６と駆動マグネツト
１７でロータが構成されている。 A hub 4 made of a non-magnetic material made of die-cast aluminum is fixed to the upper end of the rotating shaft 3, and a plurality of magnetic disks 12 are fitted to the outer circumferential portion 4a with spacers 13 in between and placed on the flange 4b. The magnetic disk 12 is fixed to the hub 4 by fixing the disk clamp 14 with a screw 15 screwed into the hub 4. A yoke 16 made of a magnetic material is insert-molded in the hub 4, and a part of the inner peripheral surface of the yoke 16 is exposed, and a drive magnet 17 is directly fixed to the exposed surface to form an efficient magnetic circuit. 4, a yoke 16, and a drive magnet 17 constitute a rotor.
上記軸受ホルダー２の外周にはコイル５が巻線
されたステータコア６が挿通されてモールド型で
支えられ、後述する絶縁性樹脂７の低圧モールド
により一体成形で固定されている。上記ステータ
コア６は例えばノリル樹脂成形で表面が覆われて
コイル５が巻線され、コイル５のリード線５ａは
ハウジング１の透孔１ａを通して回路基板１８に
接続されてコイル５に通電されるとロータのハブ
４が回転駆動される。ステータコア６に下側のハ
ウジング１にはロータ側に開口する透孔１ｂが穿
設されて上記駆動マグネツト１７の磁界を検出し
てロータの回転数を制御するホール素子や磁気感
応抵抗素子等の磁気センサー８が配設されてリー
ド端子８ａが上記回路基板１８に接続されてい
る。 A stator core 6 having a coil 5 wound thereon is inserted into the outer periphery of the bearing holder 2, supported by a mold, and is integrally fixed by low-pressure molding of an insulating resin 7, which will be described later. The surface of the stator core 6 is covered with, for example, Noryl resin molding, and a coil 5 is wound thereon, and the lead wire 5a of the coil 5 is connected to the circuit board 18 through the through hole 1a of the housing 1, and when the coil 5 is energized, the rotor The hub 4 of is driven to rotate. The lower housing 1 of the stator core 6 is provided with a through hole 1b that opens toward the rotor to detect the magnetic field of the drive magnet 17 and control the rotational speed of the rotor. A sensor 8 is provided, and a lead terminal 8a is connected to the circuit board 18.
上記のように構成されたステータ側は表面を覆
うように例えば不飽和ポリウレタン樹脂の絶縁性
樹脂７による低圧モールドで一体成形され、一体
成形されると第１図、第２図のように軸受ホルダ
ー２にステータコア６が固定され、コイル５とス
テータコア６とハウジング１の表裏との表面と、
コイル５のリード線５ａと磁気センサー８のリー
ド端子８ａが挿入される透孔１ａ，１ｂの上面と
内壁は絶縁性樹脂７で覆われると共に透孔１ａ，
１ｂは封止されてハウジング１の下側からステー
タ側及びロータ側に外気の侵入が防止される。 The stator side configured as described above is integrally molded with an insulating resin 7 made of unsaturated polyurethane resin so as to cover the surface thereof, and when the stator side is integrally molded, a bearing holder is formed as shown in Figures 1 and 2. A stator core 6 is fixed to 2, and the surfaces of the coil 5, the stator core 6, and the front and back of the housing 1,
The upper surface and inner wall of the through holes 1a, 1b into which the lead wire 5a of the coil 5 and the lead terminal 8a of the magnetic sensor 8 are inserted are covered with an insulating resin 7, and the through holes 1a, 1b are covered with an insulating resin 7.
1b is sealed to prevent outside air from entering from the lower side of the housing 1 to the stator side and the rotor side.
ブラシレスモータが上記のように構成される
と、ハウジング１の透孔１ａ，１ｂの封止と、軸
受ホルダー２にステータコア６の固定と、ステー
タコア６とコイル５の表面の被覆とが同時に１つ
の工程及び処理でなされ、接着剤とワニスの塗布
及び乾燥工程がなくなるので作業時間が著しく短
縮され、作業効率が改善されて向上されるのでコ
ストダウンすることが出来る。また、磁気センサ
ー８の回りを絶縁性樹脂で封止したのでハウジン
グ１との絶縁の信頼性が高くなると共にハウジン
グ１とステータ側の固定も強固になる。更に従来
第３図のように回路基板１８とハウジング１との
間は半田付部分等の絶縁を図るために絶縁紙１９
を介在させていたが、半田付部分等とハウジング
間に絶縁性樹脂７を介在させると絶縁紙は不要と
なる。 When the brushless motor is configured as described above, sealing of the through holes 1a and 1b of the housing 1, fixing the stator core 6 to the bearing holder 2, and coating the surfaces of the stator core 6 and the coil 5 are performed simultaneously in one process. Since the steps of applying and drying adhesive and varnish are eliminated, the working time is significantly shortened, the working efficiency is improved, and the cost can be reduced. Further, since the magnetic sensor 8 is sealed with an insulating resin, the reliability of the insulation with the housing 1 is increased, and the fixation between the housing 1 and the stator side is also strengthened. Furthermore, as shown in FIG. 3, conventionally an insulating paper 19 was placed between the circuit board 18 and the housing 1 in order to insulate the soldered parts, etc.
However, if the insulating resin 7 is interposed between the soldering part and the housing, the insulating paper becomes unnecessary.
又、磁気デイスク１２が密閉されて外気が侵入
しないから磁気ヘツドの浮上量は安定して得られ
ると共に、磁気デイスクに付着する粉塵を簡単に
封止して防止出来るので良好なトラツキングが行
なわれる。 Further, since the magnetic disk 12 is sealed so that outside air does not enter, the flying height of the magnetic head can be stably obtained, and since dust adhering to the magnetic disk can be easily sealed and prevented, good tracking can be performed.
更に軸受ホルダー２にステータコア６の固定の
ために用いられていたネジや接着剤を使用しなく
ともよくなる。 Furthermore, there is no need to use screws or adhesives that were used to fix the stator core 6 to the bearing holder 2.
又、ステータコアよりの鉄粉の発生とコイルの
被覆の剥離が防止出来る。 Furthermore, generation of iron powder from the stator core and peeling of the coil coating can be prevented.
第２図はコイル５の引き出し線５ａと磁気セン
サー８が回路基板１８に接続されると共に回路基
板１８が容易にハウジング１から離脱可能にハウ
ジング１の透孔１ａ，１ｂの上面と内壁が絶縁性
樹脂７で覆われた他の実施例で、第１図の実施例
ではハウジング１の透孔１ａ，１ｂ及び磁気セン
サー８を絶縁性樹脂で封止したので磁気センサー
８や他の回路素子が不良の場合は交換出来なかつ
たが、この実施例では磁気センサー８と回路基板
１８がハウジング１から分離出来るので磁気セン
サー８や他の回路素子の交換が可能であり、回路
基板１８の離脱で磁気デイスク１２の密閉が損わ
れない。 FIG. 2 shows that the lead wire 5a of the coil 5 and the magnetic sensor 8 are connected to the circuit board 18, and the upper surface and inner wall of the through holes 1a and 1b of the housing 1 are insulated so that the circuit board 18 can be easily removed from the housing 1. In the embodiment shown in FIG. 1, the through holes 1a and 1b of the housing 1 and the magnetic sensor 8 are sealed with an insulating resin, so that the magnetic sensor 8 and other circuit elements are not defective. However, in this embodiment, the magnetic sensor 8 and the circuit board 18 can be separated from the housing 1, so the magnetic sensor 8 and other circuit elements can be replaced. 12 sealing is not impaired.
本考案は上述のようにハウジングの透孔を絶縁
性樹脂による封止と、ステータコアの固定と、ス
テータコアとコイルの表面とを絶縁性樹脂で覆う
作業が１つの工程及び処理でなされて作業効率が
著しく改善されて向上され、上記封止によつてモ
ータ内に外気や粉塵の侵入が防止され、磁気デイ
スクが密閉されて外気が侵入しないので磁気ヘツ
ドの浮上量は安定して得られるから良好なトラツ
キングが行なわれて信頼性が向上される等実用上
優れた効果を奏する磁気デイスク駆動用ブラシレ
スモータを提供することが出来る。
As mentioned above, this invention improves work efficiency by sealing the through holes in the housing with insulating resin, fixing the stator core, and covering the surfaces of the stator core and coils with insulating resin in one process and process. The above-mentioned sealing prevents outside air and dust from entering the motor, and since the magnetic disk is sealed and outside air does not enter, the flying height of the magnetic head can be stably obtained. It is possible to provide a brushless motor for driving a magnetic disk that has excellent practical effects such as tracking and improved reliability.
第１図、第２図は本考案の実施例が示され、第
１図は磁気デイスク駆動用ブラシレスモータの断
面側面図、第２図は他の実施例分解断面側面図、
第３図は従来の磁気デイスク駆動用ブラシレスモ
ータの断面側面図、第４図は同ロータ側の側面図
である。
１……ハウジング、１ａ，１ｂ……透孔、４，
１７……ロータ（４……ハブ、１７……駆動マグ
ネツト）、６……ステータ（ステータコア）、７…
…絶縁性樹脂、８……磁気センサー、８ａ……リ
ード端子。
1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional side view of a brushless motor for driving a magnetic disk, FIG. 2 is an exploded sectional side view of another embodiment,
FIG. 3 is a sectional side view of a conventional brushless motor for driving a magnetic disk, and FIG. 4 is a side view of the rotor side. 1...Housing, 1a, 1b...Through hole, 4,
17... Rotor (4... Hub, 17... Drive magnet), 6... Stator (stator core), 7...
...Insulating resin, 8...Magnetic sensor, 8a...Lead terminal.
Claims (1)
対向配置し、かつ上記ステータをハウジングに固
定すると共に、上記ハウジングの少なくとも上記
駆動マグネツトの近傍に位置して磁気センサー等
を挿入するための透孔を穿設し、この透孔から上
記磁気センサーのリード端子等を導出させたブラ
シレスモータにおいて、上記透孔と上記ステータ
のコアの表面とを絶縁性樹脂により一体成形し上
記透孔の開口を封止してなる磁気デイスク駆動用
ブラシレスモータ。 A stator is arranged to face a drive magnet disposed on the rotor, and the stator is fixed to a housing, and a through hole is bored in the housing at least in the vicinity of the drive magnet for inserting a magnetic sensor, etc. In the brushless motor in which the lead terminals of the magnetic sensor and the like are led out from the through hole, the through hole and the surface of the core of the stator are integrally molded with an insulating resin, and the opening of the through hole is sealed. A brushless motor for driving magnetic disks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18907886U JPH0355177Y2 (en) | 1986-12-10 | 1986-12-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18907886U JPH0355177Y2 (en) | 1986-12-10 | 1986-12-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6396650U JPS6396650U (en) | 1988-06-22 |
| JPH0355177Y2 true JPH0355177Y2 (en) | 1991-12-06 |
Family
ID=31141044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18907886U Expired JPH0355177Y2 (en) | 1986-12-10 | 1986-12-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0355177Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2536126Y2 (en) * | 1991-05-20 | 1997-05-21 | 株式会社三協精機製作所 | Armature core insulation mechanism |
| JP2563741Y2 (en) * | 1992-06-12 | 1998-02-25 | 株式会社三協精機製作所 | Disk drive motor |
| JP2559224Y2 (en) * | 1992-07-08 | 1998-01-14 | 松下電器産業株式会社 | Spindle motor |
| JP2010130847A (en) * | 2008-11-28 | 2010-06-10 | Nidec Sankyo Corp | Electric motor |
-
1986
- 1986-12-10 JP JP18907886U patent/JPH0355177Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6396650U (en) | 1988-06-22 |
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