JPH0386968A - Balance correcting mechanism for magnetic disk device - Google Patents
Balance correcting mechanism for magnetic disk deviceInfo
- Publication number
- JPH0386968A JPH0386968A JP22403689A JP22403689A JPH0386968A JP H0386968 A JPH0386968 A JP H0386968A JP 22403689 A JP22403689 A JP 22403689A JP 22403689 A JP22403689 A JP 22403689A JP H0386968 A JPH0386968 A JP H0386968A
- Authority
- JP
- Japan
- Prior art keywords
- spindle
- balance correction
- fluid
- magnetic disk
- magnetic disks
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
磁気ディスク装置等に装備されるスピンドル部のバラン
ス補正機構に関し、
バランス補正を自動的に行う機能を有してなるバランス
補正機構の提供を目的とし、
磁気ディスクと回転中心を共有する形でスピンドル部上
に配置されると共に、内部に流体が流動可能に充填され
てなる無終端筒型のバランシングケースをその外周部分
に装備してなる。[Detailed Description of the Invention] [Summary] The present invention relates to a balance correction mechanism for a spindle part installed in a magnetic disk device, etc., and aims to provide a balance correction mechanism having a function of automatically performing balance correction. The balancing case is disposed on the spindle portion so as to share the center of rotation with the disk, and is equipped with an endless cylindrical balancing case on its outer periphery, the inside of which is filled with fluid so that it can flow.
本発明は、磁気ディスク装置等のスピンドル部に装備さ
れるバランス補正機構に関する。The present invention relates to a balance correction mechanism installed in a spindle of a magnetic disk device or the like.
第３図は磁気ディスク装置の構成を示す一部破断した側
面図、第４図は従来のバランス補正方法を示す模式的要
部斜視図である。FIG. 3 is a partially cutaway side view showing the configuration of a magnetic disk device, and FIG. 4 is a schematic perspective view of essential parts showing a conventional balance correction method.
第３図に示すように、磁気ディスク装置は、スピンドル
モータ１５と、このスピンドルモータ１５によって回転
駆動される回転部１２と、該回転部１２に軸係入孔４（
第４図参照）を係入させる形で配置された磁気ディスク
３と、スペーサ９を介して積層配置されたこれら磁気デ
ィスク３を前記回転部１２に固定するディスククランプ
２５より成るスピンドル部２０を装備すると共に、図示
しないアクチュエータによって半径方向（矢印ｃ−ｃ’
方向）に駆動される磁気ヘッド５０を装備している。こ
の磁気ヘット５０は、スピンドルモータ１５に駆動され
て高速回転を行っている磁気ディスク３上の所望のトラ
ックに位置決めされて記録／再生を行う。図中、７は回
転部１２を回転可能に支持するベアリング、３０はディ
スククランプ２５を回転部１２に固定する際に使用する
固定ネジをそれぞれ示す。As shown in FIG. 3, the magnetic disk drive includes a spindle motor 15, a rotating section 12 that is rotationally driven by the spindle motor 15, and a shaft engagement hole 4 (
Equipped with a spindle section 20 consisting of a magnetic disk 3 arranged in such a way as to engage the magnetic disks 3 (see FIG. 4) and a disk clamp 25 for fixing these magnetic disks 3 stacked in a stacked manner to the rotating section 12 with a spacer 9 interposed therebetween. At the same time, an actuator (not shown) moves the radial direction (arrow c-c'
The magnetic head 50 is equipped with a magnetic head 50 that is driven in a direction (direction). The magnetic head 50 is positioned at a desired track on the magnetic disk 3, which is rotated at high speed by the spindle motor 15, and performs recording/reproduction. In the figure, 7 indicates a bearing that rotatably supports the rotating section 12, and 30 indicates a fixing screw used when fixing the disk clamp 25 to the rotating section 12.
最近の磁気ディスク装置は、小型化、大容量化といった
業界のニーズに対応するため、磁気ディスク３のトラン
ク間隔は益々狭められる傾向にある。このため、磁気デ
ィスク３を含むスピンドル部２０のバランスが悪いと、
オントラック状態の時に前記磁気ヘッド５０がポジショ
ン揺れ（磁気ヘッドが正規のトラックから逸脱して他の
トラックへ移動する現象）を起こして磁気ディスク装置
が正常に動作しなくなる。In recent magnetic disk drives, in order to meet the industry's needs for smaller size and larger capacity, the trunk spacing between the magnetic disks 3 is becoming increasingly narrower. Therefore, if the spindle section 20 including the magnetic disk 3 is out of balance,
When in the on-track state, the magnetic head 50 causes positional fluctuation (a phenomenon in which the magnetic head deviates from a normal track and moves to another track), causing the magnetic disk device to malfunction.
第４図は従来のスピンドル部２０のバランス補正方法を
示す図である。FIG. 4 is a diagram showing a conventional balance correction method for the spindle section 20.
このバランス補正方式は、磁気ディスク３がわの軸係人
孔４の直径りが回転部１２の直径ｄよりも大きいことに
着目し、これら磁気ディスク３を互いに異なる方向へ偏
心させることによってスピンドル部２０全体のバランス
を補正する方式である。This balance correction method focuses on the fact that the diameter of the shaft holder hole 4 on each side of the magnetic disks 3 is larger than the diameter d of the rotating part 12, and by making these magnetic disks 3 eccentric in different directions, the spindle part This method corrects the balance of the entire 20.
従ってこのバランス補正方式は、回転部１２上に配置さ
れる磁気ディスク３の数によって各ディスクの偏心方向
がそれぞれ異なる。第４図は磁気ディスク３の数が２枚
の場合であって、この時はこれら磁気ディスク３を互い
に反対方向（矢印Ｒ方向と矢印り方向）から回転部１２
がわへ押圧する形で配置し、この磁気ディスク３の数が
例えば３枚の場合は、これらをそれぞれ１２０度ずつ離
れた方向から回転部１２に押しつける形で配置する。Therefore, in this balance correction method, the eccentric direction of each disk differs depending on the number of magnetic disks 3 arranged on the rotating section 12. FIG. 4 shows a case where the number of magnetic disks 3 is two, and in this case, these magnetic disks 3 are inserted into the rotating section 12 from opposite directions (arrow R direction and arrow direction).
If the number of magnetic disks 3 is, for example, three, they are arranged so as to be pressed against the rotating part 12 from directions 120 degrees apart from each other.
しかし、上述のような作業を実施しても、各構成部品に
はそれぞれ部品単体としてのアンバランスが存在するた
め、スピンドル部２０全体のバランスを補正することは
容易でない。However, even if the above-described work is carried out, it is not easy to correct the balance of the spindle section 20 as a whole because each component has its own imbalance.
本発明はこの問題を解決するためになされたもので、各
構成部品のバランスを意識せずにスピンドル部２０全体
のバランス補正を行う構成になっている。The present invention has been made to solve this problem, and is configured to correct the balance of the entire spindle section 20 without being conscious of the balance of each component.
本発明による磁気ディスク装置のバランス補正機構（以
下バランス補正機構と呼ぶ）は、第１図に示すように、
磁気ディスク３ （第３図、第４図参照〉とその回転中
心を共有する形でスピンドル部２０上に配置されると共
に、内部に流体１０が流動可能に充填されてなる筒型の
断面形状を有するバランシングケース１をその外周部分
に装備した構成になっている。As shown in FIG. 1, the balance correction mechanism of the magnetic disk device according to the present invention (hereinafter referred to as balance correction mechanism)
It is arranged on the spindle part 20 so as to share the rotation center with the magnetic disk 3 (see FIGS. 3 and 4), and has a cylindrical cross-sectional shape in which the fluid 10 is fluidly filled. It has a configuration in which a balancing case 1 having a structure is provided on the outer peripheral portion of the balancing case 1.
このバランス補正機構は、内部に流体１０が流動可能に
充填されてなるバランシングケース１を外周部分に装備
していることから、当該バランシングケース１の回転中
心が変化した時はこの流体１０に作用する遠心力に差が
生じ、その遠心力の差によって流体１０が回転中心から
最も遠い部分に集まるという原理を利用してスピンドル
部のバランス補正を行うもので、このバランス補正機構
の装備によってスピンドル部全体のバランス補正が自動
化される。Since this balance correction mechanism is equipped with a balancing case 1 on the outer periphery, the inside of which is filled with fluid 10 so as to be able to flow, when the center of rotation of the balancing case 1 changes, it acts on this fluid 10. This system corrects the balance of the spindle by using the principle that a difference occurs in centrifugal force and the fluid 10 gathers at the part farthest from the center of rotation due to the difference in centrifugal force.With this balance correction mechanism, the entire spindle balance correction is automated.
以下実施例図に基づいて本発明の詳細な説明する。 EMBODIMENT OF THE INVENTION The present invention will be described in detail below based on embodiment figures.
第１図（ａ）と（ｂｌは本発明の一実施例を示す平面図
とそのＸ−Ｘ線断面図、第２図は本発明によるバランス
補正機構の実装状態を示す一部破断した要部側面図であ
るが、前記第３図、第４図と同一部分には同一符号を付
している。FIGS. 1(a) and (bl) are a plan view and a sectional view taken along line X-X of the embodiment of the present invention, and FIG. 2 is a partially broken main part showing the mounting state of the balance correction mechanism according to the present invention. Although this is a side view, the same parts as in FIGS. 3 and 4 are given the same reference numerals.
第１図（ａ）と（ｂｌに示すように、本発明によるバラ
ンス補正機構５は、円板型に形成された本体部２と、そ
の外周部分に設けられた無終端筒型のバランシングケー
スｌとによって構成され、前記バランシングケース１の
内部には例えば水銀等の流体１０が密閉状態で充填され
ている。なお、このバランシングケース１の内部は、そ
の中に充填されている流体１０の流動を妨げないように
、例えば弗素樹脂等によるライニング加工が施されてい
る。図中、Ｏはこのバランス補正機構５とスピンドル部
２０の構造上の回転中心を、モしてＯ゛はスピンドル部
２０の想定上の重心位置を、また３１はこのバランス補
正機構５をスピンドル部２０に固定する固定ネジ３０の
挿通孔である。As shown in FIGS. 1(a) and 1(bl), the balance correction mechanism 5 according to the present invention includes a main body portion 2 formed in a disc shape, and an endless cylindrical balancing case l provided on the outer peripheral portion of the main body portion 2. The inside of the balancing case 1 is filled with a fluid 10 such as mercury in a sealed state.The inside of the balancing case 1 is designed to prevent the flow of the fluid 10 filled therein. In order to prevent interference, lining processing is performed using, for example, fluororesin.In the figure, O indicates the structural rotation center of the balance correction mechanism 5 and the spindle section 20, and 31 is an insertion hole for a fixing screw 30 that fixes the balance correction mechanism 5 to the spindle portion 20.
このバランス補正機構５は、第２図に示すように、磁気
ディスク３とその回転中心○を共有する形で装着される
。As shown in FIG. 2, the balance correction mechanism 5 is mounted so as to share the rotation center ○ with the magnetic disk 3.
以下本発明によるバランス補正機構の動作を第１図と第
２図を用いて説明する。但し、この説明は、スピンドル
部の構造上の回転中心（以下回転中心と呼ぶ）○とスピ
ンドル部の重心位置（以下重心位置と呼ぶ）Ｏ′ とが
第１図（ａｌに示すようにズしている場合を想定しての
ものである。The operation of the balance correction mechanism according to the present invention will be explained below with reference to FIGS. 1 and 2. However, this explanation is based on the assumption that the structural rotation center of the spindle part (hereinafter referred to as the rotation center) ○ and the position of the center of gravity of the spindle part (hereinafter referred to as the center of gravity position) O' are misaligned as shown in Fig. 1 (al). This is based on the assumption that
■、装置を作動させる。これによってスピンドル部２０
はＯを回転中心とする回転運動を起こす。■, Activate the device. As a result, the spindle part 20
causes rotational motion with O as the center of rotation.
■、ススピンドル２０が回転し始めると、その重心位置
はＯ”点にあるため、回転速度が速くなるにつれて当該
スピンドル部２０の回転中心は０点から重心位置Ｏ゛が
わへ移動する。(2) When the spindle 20 starts rotating, its center of gravity is at point O'', so as the rotational speed increases, the center of rotation of the spindle 20 moves from point 0 toward the center of gravity O''.
■、ススピンドル２０の回転中心が０点から０″点がわ
へ移動したことによって、Ｏ”点から０点を経由してＡ
点に到る距離、つまりＯ’ −Ａ間の距離の方が、０
点からＡ点までの距離、つまり０−Ａ間の距離よりも大
きくなる。■As the rotation center of the spindle 20 moves from the 0 point to the 0'' point, it moves from the O'' point to the 0 point to A
The distance to the point, that is, the distance between O' and A, is 0
It is larger than the distance from point to point A, that is, the distance between 0 and A.
■、Ｏ’ −Ａ間の距離がＯ−Ａ間の距離よりも大き
くなるということは、その部分の実質的な回転半径が構
造上の回転半径よりも大きくなったということで、その
結果、バランシングケースｌ内の流体１０は、遠心力が
最も大きく作用するＡ点付近に集まる。■The fact that the distance between O' and A is larger than the distance between O and A means that the effective radius of rotation of that part has become larger than the structural radius of rotation, and as a result, The fluid 10 in the balancing case 1 gathers near point A, where the centrifugal force is greatest.
■、流体１０がＡ点付近に集まったことによってスピン
ドル部２０のアンバランスが補正され、スピンドル部２
０は安定した回転を行うことになる。(2) As the fluid 10 gathers near point A, the unbalance of the spindle part 20 is corrected, and the spindle part 20
0 means stable rotation.
この実施例では、バランス補正機構５を独立した単体部
品として構成しているが、これをディスククランプ２５
と一体化しても良く、またこのバランシングケース１を
スピンドル部２０内に設けるようにしても良い。また本
実施例ではバランシングケース１の断面形状が四角形の
管型になっているが、これを例えば円管型にしてもかま
わない。In this embodiment, the balance correction mechanism 5 is configured as an independent single component, which is connected to the disk clamp 25.
Alternatively, the balancing case 1 may be provided within the spindle portion 20. Further, in this embodiment, the cross-sectional shape of the balancing case 1 is a rectangular tube shape, but it may be, for example, a circular tube shape.
以上の説明から明らかなように本発明によれば、スピン
ドル部を作動させることによって自動的。As is clear from the above description, according to the present invention, the spindle section is operated automatically.
かつ的確にスピンドル部全体のバランス補正を行い得る
ことから、スピンドル系のバランス補正作業が著しく効
率化される。In addition, since the balance of the entire spindle section can be accurately corrected, the balance correction work of the spindle system can be made significantly more efficient.
第１図（ａｌと（ｂｌは本発明の一実施例を示す平面図
とそのＸ−Ｘ線断面図、
第２図は本発明によるバランス補正機構の実装状態を示
す一部破断した要部側面図、
第３図は磁気ディスク装置の構成を示す要部側断面図、
第４図は従来のバランス補正方法を示す模式的要部斜視
図である。
図において、■はバランシングケース、２は本体部、
３は磁気ディスク、
４は軸係人孔、
５はバランス補正機構、
７はベアリング、
９はスペーサ、
１０は流体、
１２は回転部、
Ｉ５はスピンドルモータ、
２０はスピンドル部、
２５はディスククランプ、
３０は固定ネジ、
３１はネジ挿通孔、
５０は磁気ヘッド、
０はスピンドル部の構造上の回転
中心、
０
はスピンドル部の重心位置、
Ｄは軸係入孔４の直径、
ｄは回転部１２の直径、
をそれぞれ示す。
半帝哨の一欠將σＩＪの
第 ｉ 図
第
図Figure 1 (al and (bl) are a plan view and a cross-sectional view taken along line X-X of the embodiment of the present invention; Figure 2 is a partially broken side view of the main part showing the mounting state of the balance correction mechanism according to the present invention. Figure 3 is a side sectional view of the main part showing the configuration of a magnetic disk drive, and Figure 4 is a schematic perspective view of the main part showing the conventional balance correction method. In the figure, ■ is a balancing case, 2 is a main body 3 is a magnetic disk, 4 is a shaft hole, 5 is a balance correction mechanism, 7 is a bearing, 9 is a spacer, 10 is a fluid, 12 is a rotating part, I5 is a spindle motor, 20 is a spindle part, 25 is a disk Clamp, 30 is a fixing screw, 31 is a screw insertion hole, 50 is a magnetic head, 0 is the structural rotation center of the spindle part, 0 is the center of gravity position of the spindle part, D is the diameter of the shaft insertion hole 4, d is the rotation The diameter of part 12 is shown respectively.
Claims (1)
のバランス補正機構であって、 磁気ディスク（３）と回転中心を共有する形でスピンド
ル部（２０）上に配置されると共に、内部に流体（１０
）が流動可能に充填されてなる無終端筒型のバランシン
グケース（１）をその外周部分に装備してなることを特
徴とする磁気ディスク装置のバランス補正機構。[Claims] Spindle unit (20) installed in a magnetic disk device, etc.
The balance correction mechanism is arranged on the spindle part (20) so as to share the center of rotation with the magnetic disk (3), and has a fluid (10) inside.
1. A balance correction mechanism for a magnetic disk drive, characterized in that the outer periphery of the balancing case (1) is equipped with an endless cylindrical balancing case (1), which is filled with fluidically filled with (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22403689A JPH0386968A (en) | 1989-08-29 | 1989-08-29 | Balance correcting mechanism for magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22403689A JPH0386968A (en) | 1989-08-29 | 1989-08-29 | Balance correcting mechanism for magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0386968A true JPH0386968A (en) | 1991-04-11 |
Family
ID=16807590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22403689A Pending JPH0386968A (en) | 1989-08-29 | 1989-08-29 | Balance correcting mechanism for magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0386968A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0829872A2 (en) * | 1996-09-17 | 1998-03-18 | Hitachi, Ltd. | Disc device |
| EP0836185A2 (en) * | 1996-10-09 | 1998-04-15 | Samsung Electronics Co., Ltd. | Self-compensating dynamic balancer apparatus for a disk player |
| EP0856727A2 (en) * | 1997-02-03 | 1998-08-05 | Nec Corporation | Automatic balancing mechanism for a rotor |
| EP0927999A1 (en) * | 1997-12-31 | 1999-07-07 | Samsung Electronics Co., Ltd. | Self-compensating dynamic balancer |
| EP0938087A1 (en) * | 1998-02-19 | 1999-08-25 | Deutsche Thomson-Brandt Gmbh | Device for reading from and/or writing to recording media in disc form |
| US6205110B1 (en) | 1997-06-25 | 2001-03-20 | Nidec Corporation | Disk drive motor |
| US6256289B1 (en) | 1998-06-18 | 2001-07-03 | Nidec Corporation | Storage media driving motor with rotor magnet position determiner and balancing objects |
| US6373154B1 (en) | 1996-10-09 | 2002-04-16 | Samsung Electronics Co., Ltd | Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle motor incorporating self-compensating dynamic balancer adopted for disk player |
| US6507555B1 (en) | 1996-07-19 | 2003-01-14 | Matsushita Electric Industrial Co., Ltd. | Balanced disk drive apparatus |
| US6741544B1 (en) | 1997-09-25 | 2004-05-25 | Matsushita Electric Industrial Co., Ltd. | Disk drive apparatus |
| KR100522590B1 (en) * | 1998-08-26 | 2005-10-19 | 삼성전자주식회사 | Ballancer |
-
1989
- 1989-08-29 JP JP22403689A patent/JPH0386968A/en active Pending
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6711116B2 (en) | 1996-07-19 | 2004-03-23 | Matsushita Electric Industrial Co., Ltd. | Balanced disk drive apparatus |
| US6704271B2 (en) * | 1996-07-19 | 2004-03-09 | Matsushita Electric Industrial Co., Ltd. | Disk drive apparatus |
| US6507555B1 (en) | 1996-07-19 | 2003-01-14 | Matsushita Electric Industrial Co., Ltd. | Balanced disk drive apparatus |
| US6198715B1 (en) | 1996-09-17 | 2001-03-06 | Hitachi, Ltd. | Disc device having disc in balance correcting arrangements |
| KR100571030B1 (en) * | 1996-09-17 | 2006-09-28 | 가부시끼가이샤 히다치 세이사꾸쇼 | Disk device |
| EP0829872A3 (en) * | 1996-09-17 | 1998-12-16 | Hitachi, Ltd. | Disc device |
| EP0829872A2 (en) * | 1996-09-17 | 1998-03-18 | Hitachi, Ltd. | Disc device |
| US6388981B1 (en) | 1996-10-09 | 2002-05-14 | Samsung Electronics Co., Ltd. | Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle motor incorporating self-compensating dynamic balancer adopted for disk player |
| US6535475B1 (en) | 1996-10-09 | 2003-03-18 | Samsung Electronics Co., Ltd. | Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle motor incorporating self-compensating dynamic balancer adopted for disk player |
| US7367037B2 (en) | 1996-10-09 | 2008-04-29 | Samsung Electronics Co., Ltd. | Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle motor incorporating self-compensating dynamic balancer adopted for disk player |
| CN100354932C (en) * | 1996-10-09 | 2007-12-12 | 三星电子株式会社 | Disc drive device with self compensating dynamic balancer |
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| EP1336962A3 (en) * | 1996-10-09 | 2006-01-04 | Samsung Electronics Co. Ltd | Disk player and turntable incorporating self compensating dynamic balancer |
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| US6456583B1 (en) | 1996-10-09 | 2002-09-24 | Samsung Electronics Co., Ltd. | Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle motor incorporating self-compensating dynamic balancer adopted for disk player |
| EP1336962A2 (en) * | 1996-10-09 | 2003-08-20 | Samsung Electronics Co. Ltd | Disk player and turntable incorporating self compensating dynamic balancer |
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| KR100522590B1 (en) * | 1998-08-26 | 2005-10-19 | 삼성전자주식회사 | Ballancer |
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