JP2901254B2 - Rotary magnetic head positioning device for magnetic disk drive - Google Patents
Rotary magnetic head positioning device for magnetic disk driveInfo
- Publication number
- JP2901254B2 JP2901254B2 JP63221012A JP22101288A JP2901254B2 JP 2901254 B2 JP2901254 B2 JP 2901254B2 JP 63221012 A JP63221012 A JP 63221012A JP 22101288 A JP22101288 A JP 22101288A JP 2901254 B2 JP2901254 B2 JP 2901254B2
- Authority
- JP
- Japan
- Prior art keywords
- grease
- magnetic disk
- rotary
- disk drive
- positioning device
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6607—Retaining the grease in or near the bearing
- F16C33/6618—Retaining the grease in or near the bearing in a reservoir in the sealing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2370/00—Apparatus relating to physics, e.g. instruments
- F16C2370/12—Hard disk drives or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Moving Of Heads (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は磁気ディスク装置の回転形磁気ヘッド位置決
め装置に関し、特に軸受に封入したグリースが飛散して
磁気ディスク面に附着するのを防ぐ改良に関する。Description: BACKGROUND OF THE INVENTION The present invention relates to a rotary magnetic head positioning device for a magnetic disk drive, and more particularly to an improvement for preventing grease sealed in a bearing from scattering and adhering to a magnetic disk surface. .
（従来の技術） 従来の磁気ディスク装置の回転形磁気ヘッド位置決め
装置を図面を用いて説明する。(Prior Art) A conventional rotary magnetic head positioning device for a magnetic disk drive will be described with reference to the drawings.
第２図は従来の磁気ディスク装置の回転形磁気ヘッド
位置決め装置の構成を示す図である。FIG. 2 is a diagram showing the configuration of a conventional rotary magnetic head positioning device of a magnetic disk drive.
第２図において、磁気ヘッド51はヘッドアーム５に取
り付けてあり、ヘッドアーム５はキャリッジ１に取り付
けてある。キャリッジ１は軸受３、同４を介して回転軸
２に取り付けてあり、該キャリッジ１に固定したコイル
組立体６と永久磁石61の間の電磁力によって上記回転軸
２のまわりに回転する。前記の電磁力は磁気ディスク装
置のシーク命令に基づいて制御されるので、該シーク命
令に従ってキャリッジ１が回転軸２のまわりに回転し磁
気ヘッド51を磁気ディスク71のディスク面上の所定の場
所に位置決めできる。In FIG. 2, the magnetic head 51 is attached to the head arm 5, and the head arm 5 is attached to the carriage 1. The carriage 1 is attached to the rotating shaft 2 via the bearings 3 and 4, and rotates around the rotating shaft 2 by the electromagnetic force between the coil assembly 6 fixed to the carriage 1 and the permanent magnet 61. Since the electromagnetic force is controlled based on a seek command of the magnetic disk device, the carriage 1 rotates around the rotation shaft 2 in accordance with the seek command, and moves the magnetic head 51 to a predetermined position on the disk surface of the magnetic disk 71. Can be positioned.
第３図は従来の磁気ディスク装置の回転形磁気ヘッド
位置決め装置の軸受部分を示す図である。FIG. 3 is a view showing a bearing portion of a rotary magnetic head positioning device of a conventional magnetic disk drive.
軸受３、同４はいずれもラジアル玉軸受であってその
構造は同じであるので軸受３の構造についてだけ説明す
る。軸受３は内輪31が回転軸２と嵌合し、外輪33がキャ
リッジ１と嵌合している。Since the bearings 3 and 4 are both radial ball bearings and have the same structure, only the structure of the bearing 3 will be described. The bearing 3 has an inner ring 31 fitted to the rotary shaft 2 and an outer ring 33 fitted to the carriage 1.
内輪31と外輪33の間には保持器35の保持した玉34があ
る。グリースは多量に封入すると磁気ディスク装置内に
飛散して該装置内を汚すので、これを防ぐために玉34と
シールド板37の間又は玉34とシールド板38との間のいず
れか一方に封入してある。A ball 34 held by a retainer 35 is provided between the inner ring 31 and the outer ring 33. If a large amount of grease is enclosed, it scatters inside the magnetic disk device and contaminates the device, so in order to prevent this, seal it between the ball 34 and the shield plate 37 or between the ball 34 and the shield plate 38. It is.
（発明が解決しようとする課題） しかしながら上述した従来の磁気ディスク装置の回転
形磁気ヘッド位置決め装置には次のような問題点があ
る。(Problems to be Solved by the Invention) However, the above-described conventional rotary magnetic head positioning device of the magnetic disk device has the following problems.
すなわち第３図に示すように、軸受３と同４をキャリ
ッジ１と回転軸２の間に早着する場合、軸受３の玉34と
シールド板38の間にグリースが封入されているとこのグ
リースはシールド板38と内輪31又は外輪33との間から飛
散し、軸受４の玉44とシールド板48の間にグリースが封
入されているとこのグリースはシールド板48と内輪41又
は外輪43との間から飛散し、いずれも磁気ディスクのデ
ィスク面に附着する。That is, as shown in FIG. 3, when the bearings 3 and 4 are quickly mounted between the carriage 1 and the rotary shaft 2, if the grease is sealed between the ball 34 of the bearing 3 and the shield plate 38, Is scattered from between the shield plate 38 and the inner ring 31 or the outer ring 33, and if grease is sealed between the ball 44 of the bearing 4 and the shield plate 48, this grease is applied between the shield plate 48 and the inner ring 41 or the outer ring 43. The particles scatter from between and attach to the disk surface of the magnetic disk.
磁気ディスク装置では記録又は再生を行う時の磁気デ
ィスクのディスク面と磁気ヘッドとの間隙が近年ますま
す狭くなって来ているので、上記のようにグリースが磁
気ディスクのディスク面に附着していると該グリースが
磁気ヘッドにひっかかって磁気ヘッドの姿勢を変えてし
まったり最悪の場合には磁気ヘッドの損壊（以下ヘッド
クラッシュと言う）をも引き起こしたりする。In magnetic disk drives, the gap between the disk surface of the magnetic disk and the magnetic head during recording or reproduction has become increasingly smaller in recent years, so grease is attached to the disk surface of the magnetic disk as described above. In addition, the grease may catch the magnetic head and change the attitude of the magnetic head, or in the worst case, may cause damage to the magnetic head (hereinafter referred to as head crash).
以上のように、従来の磁気ディスク装置の回転形磁気
ヘッド位置決め装置には、軸受に封入したグリースが飛
散して磁気ディスクのディスク面に附着し易いことによ
って磁気ヘッドの姿勢が変わったり最悪の場合にはヘッ
ドクラッシュが起きたりしてしまうという問題がある。As described above, in the conventional rotary magnetic head positioning device of the magnetic disk device, the grease sealed in the bearing is scattered and easily attached to the disk surface of the magnetic disk, so that the posture of the magnetic head changes or in the worst case. Has a problem that a head crash occurs.
本発明の目的は、キャリッジと回転軸の間に装着する
２個の軸受の相互に向かい合う側にのみグリースを封入
するようにすることによってグリースをキャリッジの外
に飛散させないようにし、これにより磁気ディスクのデ
ィスク面にグリースを附着させずしたがって附着グリー
スが磁気ヘッドの姿勢を変えたり最悪の場合にヘッドク
ラッシュを引き起こしたりすることのなくなる磁気ディ
スク装置の回転形磁気ヘッド位置決め装置を提供するこ
とである。SUMMARY OF THE INVENTION It is an object of the present invention to prevent the grease from scattering out of the carriage by filling the grease only on the mutually facing sides of the two bearings mounted between the carriage and the rotating shaft. It is an object of the present invention to provide a rotary magnetic head positioning device for a magnetic disk drive in which grease is not attached to the disk surface of the magnetic disk device, so that the attached grease does not change the attitude of the magnetic head or cause a head crash in the worst case.
（課題を解決するための手段） 本発明の磁気ディスク装置の回転形磁気ヘッド位置決
め装置は上記の目的を達成するために次の手段構成を有
する。(Means for Solving the Problems) The rotary magnetic head positioning device for a magnetic disk drive of the present invention has the following means configuration to achieve the above object.
すなわち本発明の磁気ディスク装置の回転形磁気ヘッ
ド位置決め装置は、磁気ディスク装置用回転形キャリッ
ジが２個のラジアル玉軸受を介して１本の回転軸に取り
付けられ、該ラジアル玉軸受の相互に向かい合う側にの
みグリースが封入されていることを特徴とするものであ
る。That is, in the rotary magnetic head positioning device of the magnetic disk drive of the present invention, the rotary carriage for the magnetic disk drive is mounted on one rotary shaft via two radial ball bearings, and the radial ball bearings face each other. The grease is sealed only on the side.
（作 用） 以下、上記の手段構成を有する本発明の磁気ディスク
装置の回転形磁気ヘッド位置決め装置の作用を説明す
る。(Operation) Hereinafter, the operation of the rotary magnetic head positioning device of the magnetic disk drive of the present invention having the above configuration will be described.
磁気ディスク装置用回転形キャリッジと１本の回転軸
との間には２個のラジアル玉軸受を装着してあり、該２
個のラジアル逆軸受には相互に向かい合う側にのみグリ
ースを封入してある。Two radial ball bearings are mounted between the rotary carriage for the magnetic disk drive and one rotary shaft.
The radial reverse bearings are filled with grease only on the sides facing each other.
シーク命令によって磁気ディスク装置用回転形キャリ
ッジ（以下ただキャリッジと言う）が回転するとグリー
スはラジアル玉軸受の外に飛散しようとするが、グリー
スを封入している側のシールド板と内輪又は外輪の隙間
からグリースが飛散してもこのグリースは相対するラジ
アル玉軸受の方に向かうことになりしかも２個のラジア
ル玉軸受の間はキャリッジで覆われているのでキャリッ
ジの外には出ない。また相対するラジアル玉軸受に向か
うのとは反対の方に向かうグリースは保持器や玉に遮ら
れたものでこれもキャリッジの外には出ない。以上の結
果グリースが磁気ディスクのディスク面に附着しないの
で、附着グリースによる磁気ヘッドの姿勢変化やヘッド
クラッシュが発生しない。When a rotary carriage for a magnetic disk drive (hereinafter simply referred to as a carriage) rotates according to a seek command, grease tends to scatter outside the radial ball bearing, but the gap between the shield plate on which the grease is sealed and the inner ring or the outer ring. Even if the grease scatters, the grease will be directed toward the opposing radial ball bearing, and will not go out of the carriage since the space between the two radial ball bearings is covered by the carriage. Further, the grease directed in the direction opposite to the direction of the opposing radial ball bearing is blocked by the retainer and the ball and does not come out of the carriage. As a result, since the grease does not adhere to the disk surface of the magnetic disk, the attached grease does not cause a change in the attitude of the magnetic head or a head crash.
（実 施 例） 以下、本発明の磁気ディスク装置の回転形磁気ヘッド
位置決め装置の実施例を図面を参照して説明する。(Embodiment) An embodiment of a rotary magnetic head positioning device for a magnetic disk drive according to the present invention will be described below with reference to the drawings.
第１図は本発明の磁気ディスク装置の回転形磁気ヘッ
ド位置決め装置の軸受部を示す図である。FIG. 1 is a view showing a bearing portion of a rotary magnetic head positioning device of a magnetic disk drive according to the present invention.
キャリッジ１と回転軸２の間には軸受３、同４を装着
してあり、この軸受３、同４はいずれもラジアル玉軸受
でその構造そのものは前述した従来の磁気ディスク装置
の回転形磁気ヘッド位置決め装置の軸受部分（第３図参
照）と同じである。Bearings 3 and 4 are mounted between the carriage 1 and the rotating shaft 2, and each of the bearings 3 and 4 is a radial ball bearing whose structure itself is the rotary magnetic head of the above-described conventional magnetic disk drive. It is the same as the bearing part of the positioning device (see FIG. 3).
第１図に示すように軸受３の玉34とシールド板37の間
および軸受４の玉44とシールド板47の間にグリース39、
同49を封入してある。As shown in FIG. 1, a grease 39 is provided between the ball 34 of the bearing 3 and the shield plate 37 and between the ball 44 of the bearing 4 and the shield plate 47.
49 is enclosed.
したがってキャリッジ１がシーク命令に基づいて回転
軸２のまわりに回転することによりグリース39、同49が
移動する場合、グリース39がシールド板37と内輪31又は
外輪33の間から洩れて飛散しても、あるいはグリース49
がシールド板47と内輪41又は外輪43の間から洩れて飛散
しても、グリース39は軸受４の方へ向かい、グリース49
は軸受３の方へ向かい、しかも軸受３と同４の間はキャ
リッジ１が覆っているので、上記のグリース39、同49は
ともにキャリッジ１の外に出ることがない。また軸受３
においてはグリース39が軸受４の方に向かうのとは反対
向きに移動しようとすると玉34や保持器35に遮られる
し、軸受４においてはグリース49が軸受３の方に向かう
のとは反対向きに移動しようとする玉44や保持器45に遮
られるのでグリース39、同49はともにキャリッジ１の外
に出ることがない。Therefore, when the carriage 1 rotates around the rotary shaft 2 based on the seek command and the greases 39 and 49 move, even if the grease 39 leaks and scatters between the shield plate 37 and the inner ring 31 or the outer ring 33. Or grease 49
Grease 39 flows toward the bearing 4 even if the grease 39 leaks and scatters between the shield plate 47 and the inner ring 41 or the outer ring 43, and the grease 49
Moves toward the bearing 3 and the carriage 1 covers between the bearings 3 and 4, so that the greases 39 and 49 do not go out of the carriage 1. Bearing 3
When the grease 39 moves in the direction opposite to the direction toward the bearing 4, the grease 39 is blocked by the balls 34 and the retainer 35, and in the bearing 4, the grease 49 faces in the direction opposite to the direction toward the bearing 3. The grease 39 and the grease 49 do not go out of the carriage 1 because they are blocked by the ball 44 and the retainer 45 that are going to move.
以上の結果グリース39、同49はいずれも磁気ディスク
のディスク面に附着しないので、附着グリースによる磁
気ヘッドの姿勢変化やヘッドクラッシュが発生しない。As a result, since neither grease 39 nor 49 is attached to the disk surface of the magnetic disk, the attached grease does not cause a change in the attitude of the magnetic head or a head crash.
（発明の効果） 以上説明したように、本発明の磁気ディスク装置の回
転形磁気ヘッド位置決め装置は、磁気ディスク装置用回
転形キャリッジが２個のラジアル玉軸受を介して１本の
回転軸に取り付けられ、該ラジアル玉軸受は相互に向か
い合う側にのみグリースを封入されているのでグリース
がキャリッジの外に飛散せずしたがって附着グリースに
よる磁気ヘッドの姿勢変化やヘッドクラッシュが発生し
ないという利点を有する。(Effects of the Invention) As described above, in the rotary magnetic head positioning device of the magnetic disk drive of the present invention, the rotary carriage for the magnetic disk drive is mounted on one rotary shaft via two radial ball bearings. Since the radial ball bearings are filled with grease only on the sides facing each other, there is an advantage that the grease does not scatter out of the carriage, so that the attached grease does not change the attitude of the magnetic head or cause a head crash.
【図面の簡単な説明】 第１図は本発明の磁気ディスク装置の回転形磁気ヘッド
位置決め装置の軸受部を示す図、第２図は従来の磁気デ
ィスク装置の回転形磁気ヘッド位置決め装置の構成を示
す図、第３図は従来の磁気ディスク装置の回転形磁気ヘ
ッド位置決め装置の軸受部分を示す図である。 １……キャリッジ、２……回転軸、3,4……軸受、５…
…ヘッドアーム、６……コイル組立体、31……内輪、33
……外輪、34……玉、35……保持器、37,38……シール
ド板、39……グリース、41……内輪、43……外輪、44…
…玉、45……保持器、47,48……シールド板、49……グ
リース、51……磁気ヘッド、61……永久磁石、70……ス
ピンドル、71……磁気ディスク。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a bearing portion of a rotary magnetic head positioning device for a magnetic disk drive according to the present invention, and FIG. 2 is a diagram showing a configuration of a conventional rotary magnetic head positioning device for a magnetic disk drive. FIG. 3 is a view showing a bearing portion of a rotary magnetic head positioning device of a conventional magnetic disk drive. 1 ... carriage, 2 ... rotary shaft, 3,4 ... bearing, 5 ...
... head arm, 6 ... coil assembly, 31 ... inner ring, 33
…… Outer ring, 34 …… Ball, 35 …… Cage, 37,38 …… Shield plate, 39 …… Grease, 41 …… Inner ring, 43 …… Outer ring, 44…
... balls, 45 ... cages, 47, 48 ... shield plates, 49 ... grease, 51 ... magnetic heads, 61 ... permanent magnets, 70 ... spindles, 71 ... magnetic disks.
Claims (1)
個のラジアル玉軸受を介して１本の回転軸に取り付けら
れ、該ラジアル玉軸受の相互に向かい合う側にのみグリ
ースが封入されていることを特徴とする磁気ディスク装
置の回転形磁気ヘッド位置決め装置。1. A rotary carriage for a magnetic disk drive, comprising:
A rotary magnetic head positioning device for a magnetic disk drive, wherein the rotary ball bearing is attached to one rotating shaft via two radial ball bearings, and grease is sealed only on opposing sides of the radial ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63221012A JP2901254B2 (en) | 1988-09-03 | 1988-09-03 | Rotary magnetic head positioning device for magnetic disk drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63221012A JP2901254B2 (en) | 1988-09-03 | 1988-09-03 | Rotary magnetic head positioning device for magnetic disk drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0268780A JPH0268780A (en) | 1990-03-08 |
| JP2901254B2 true JP2901254B2 (en) | 1999-06-07 |
Family
ID=16760095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63221012A Expired - Lifetime JP2901254B2 (en) | 1988-09-03 | 1988-09-03 | Rotary magnetic head positioning device for magnetic disk drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2901254B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59165272A (en) * | 1983-03-09 | 1984-09-18 | Hitachi Ltd | Positioning mechanism of magnetic head |
| JPS59205005A (en) * | 1983-05-06 | 1984-11-20 | Nippon Telegr & Teleph Corp <Ntt> | Swayable actuator |
| JPH0341327Y2 (en) * | 1985-06-17 | 1991-08-30 | ||
| JPS62231475A (en) * | 1986-04-01 | 1987-10-12 | Hitachi Ltd | Bearing for guiding magnetic disk device |
-
1988
- 1988-09-03 JP JP63221012A patent/JP2901254B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0268780A (en) | 1990-03-08 |
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