JPH054359U - Rolling bearing with head positioning mechanism - Google Patents

Rolling bearing with head positioning mechanism

Info

Publication number
JPH054359U
JPH054359U JP4296192U JP4296192U JPH054359U JP H054359 U JPH054359 U JP H054359U JP 4296192 U JP4296192 U JP 4296192U JP 4296192 U JP4296192 U JP 4296192U JP H054359 U JPH054359 U JP H054359U
Authority
JP
Japan
Prior art keywords
bearing
ball
rolling bearing
fixed
carriage
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.)
Granted
Application number
JP4296192U
Other languages
Japanese (ja)
Other versions
JP2548776Y2 (en
Inventor
稔 藤野
義文 溝下
朋良 山田
敬治 有賀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP1992042961U priority Critical patent/JP2548776Y2/en
Publication of JPH054359U publication Critical patent/JPH054359U/en
Application granted granted Critical
Publication of JP2548776Y2 publication Critical patent/JP2548776Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/762—Sealings of ball or roller bearings by means of a fluid
    • F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
    • F16C33/765—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap by a magnetic field
    • 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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
    • 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
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moving Of Heads (AREA)

Abstract

(57)【要約】 【目的】 磁気ディスク装置等のヘツド位置機構のころ
がり軸受に関し、ボール収容部に充填したグリースのデ
ィスク収容空間への飛散を防止する。 【構成】 ディスク上の所定トラックへキャリッジに搭
載したヘッドを位置決めするヘッド位置決め機構のころ
がり軸受であって、該ころがり軸受は前記キャリッジ
か、それを案内する固定台のいずれかに取付けた固定軸
に支持されたボールベアリングを主体として成り、該ボ
ールベアリングの軸挿入側と反対側の側面部にはベアリ
ング内輪とボール収容部を覆うように薄板状シールがベ
アリング外輪の端縁部に固着され、同ベアリングの軸挿
入側の側面部にはボール収容部を覆うように輪形の磁性
流体シールがベアリング外輪に固着されている。 (57) [Abstract] [Purpose] With respect to a rolling bearing of a head position mechanism of a magnetic disk device or the like, it is possible to prevent the grease filled in a ball housing portion from scattering into the disk housing space. A rolling bearing of a head positioning mechanism for positioning a head mounted on a carriage to a predetermined track on a disk, the rolling bearing being a fixed shaft attached to either the carriage or a fixed base for guiding the rolling bearing. It is mainly composed of a supported ball bearing, and a thin plate-like seal is fixed to the end edge of the bearing outer ring so as to cover the bearing inner ring and the ball accommodating portion on the side surface of the ball bearing opposite to the shaft insertion side. A ring-shaped magnetic fluid seal is fixed to the bearing outer ring on the side surface of the bearing on the shaft insertion side so as to cover the ball accommodating portion.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】[Industrial applications]

この考案は、磁気ディスク装置等のヘッド位置決め機構のころがり軸受に関す るものである。 The present invention relates to a rolling bearing of a head positioning mechanism of a magnetic disk device or the like.

【０００２】[0002]

【従来の技術】[Prior Art]

磁気ディスク装置のヘッド位置決め機構として、第２図に示すようなものが知 られている。これはヘッド11を搭載したキャリッジ12がころがり軸受13を車輪と してガイドレール14の上を直進するように構成されている。直進駆動力は位置決 め制御部の信号にて作動するアクチェータ15より与えられ、その大きさを制御し て磁気ディスク16の目標トラックにヘッド11が位置決めされるようにしている。 なお、前記ころがり軸受13は、ボールベアリングをキャリッジ側面部の固定軸に 支持しただけの簡単な構造のものが用いられている。 As a head positioning mechanism for a magnetic disk device, one shown in FIG. 2 is known. This is configured such that a carriage 12 having a head 11 mounted thereon travels straight on a guide rail 14 using a rolling bearing 13 as a wheel. The linear driving force is given from the actuator 15 which operates by a signal from the position determination control unit, and the magnitude thereof is controlled to position the head 11 on the target track of the magnetic disk 16. The rolling bearing 13 has a simple structure in which a ball bearing is supported by a fixed shaft on the side surface of the carriage.

【０００３】[0003]

【考案が解決しようとする問題点】[Problems to be solved by the device]

ところが、このようなころがり軸受 (ボールベアリング）では、固定軸が挿入 された側、及びそれとは反対側の側面部がそれぞれディスク収容空間に露出する ため、ボール収容部に充填したグリース等の潤滑剤がキャリッジ12の連続的な高 速移動に伴う軸受の温度上昇に起因してその移動中に当該側面部から飛散して磁 気ディスク16の表面やヘッドに付着し、ヘッドの安定な浮上を妨げたり、ヘッド クラッシュを引き起こすという問題があった。 However, in such a rolling bearing (ball bearing), the side on which the fixed shaft is inserted and the side surface on the opposite side are exposed to the disk accommodating space. Due to the temperature rise of the bearing due to the continuous high-speed movement of the carriage 12, it scatters from the side surface during the movement and adheres to the surface of the magnetic disk 16 and the head, which hinders stable head flying. Or, there was a problem of causing a head crash.

【０００４】 この考案は、以上のような従来の状況からグリース等が外部へ飛散しない新し いヘッド位置決め機構のころがり軸受の提供を目的とするものである。An object of the present invention is to provide a rolling bearing of a new head positioning mechanism in which grease or the like does not scatter to the outside under the conventional circumstances as described above.

【０００５】[0005]

【課題を解決するための手段】[Means for Solving the Problems]

この考案のころがり軸受では、第１図に示すように、ボールベアリング22の固 定軸挿入側と反対側の側面部においてベアリング内輪22Ａとボール収容部を覆う ように薄板状シール23がベアリング外輪22Ｂの端縁部に固着され、同ベアリング の軸挿入側の側面部にはボール収容部を覆うように輪形の磁性流体シール24がベ アリング外輪22Ｂに固着されている。 In the rolling bearing of the present invention, as shown in FIG. 1, a thin plate-like seal 23 is provided on a side surface portion of the ball bearing 22 opposite to the fixed shaft inserting side so as to cover the bearing inner ring 22A and the ball accommodating portion. A ring-shaped magnetic fluid seal 24 is fixed to the bearing outer ring 22B so as to cover the ball accommodating portion on the side surface on the shaft insertion side of the bearing.

【０００６】[0006]

【作用】[Action]

前記ボールベアリング22の外側の側面部を覆うように設けられた薄板状シール 23は、ベアリング内輪22Ａおよびボール収容部をデイスク収容空間と完全に遮蔽 する。また同ベアリング22の内側の側面部に設けられた輪形の磁性流体シール24 は、磁性流体をベアリング内輪22Ａの内壁面に密着してボール収容部をディスク 収容空間と遮蔽する。これらの結果、キャリッジの高速移動時におけるディスク 収容空間へのグリース等の飛散を阻止できる。 The thin plate-like seal 23 provided so as to cover the outer side surface of the ball bearing 22 completely shields the bearing inner ring 22A and the ball accommodating portion from the disc accommodating space. A ring-shaped magnetic fluid seal 24 provided on the inner side surface of the bearing 22 closely contacts the magnetic fluid with the inner wall surface of the bearing inner ring 22A to shield the ball storage portion from the disc storage space. As a result, it is possible to prevent grease and the like from scattering into the disk storage space when the carriage moves at high speed.

【０００７】[0007]

【実施例】【Example】

第１図は、この考案のヘッド位置決め機構を前記第３図の磁気ディスク装置の ヘッド位置決め機構に適用した例の縦断面図を示す。この図において、12は磁気 ヘッドを搭載したキャリッジ、14はガイドレール、21はキャリッジ12の側面部に 取付けられた固定軸、22は固定軸21に内輪22Ａを固着して前記ガイドレール14に 接する外輪22Ｂを回転可能としたボールベアリングである。ここまでは従来のも のと同じであり、この構造によればボールベアリング22の軸挿入側、及びそれと 反対側の各側面部はディスク収容空間に完全に露出し、同空間へのグリース飛散 を不本意にも可能とする。 FIG. 1 is a vertical sectional view of an example in which the head positioning mechanism of the present invention is applied to the head positioning mechanism of the magnetic disk device of FIG. In this figure, 12 is a carriage on which a magnetic head is mounted, 14 is a guide rail, 21 is a fixed shaft attached to the side surface of the carriage 12, 22 is an inner ring 22A fixed to the fixed shaft 21, and is in contact with the guide rail 14. This is a ball bearing that allows the outer ring 22B to rotate. Up to this point, it is the same as the conventional one.According to this structure, the shaft insertion side of the ball bearing 22 and each side surface on the opposite side are completely exposed to the disk accommodating space, and grease scattering to the space is prevented. Reluctantly possible.

【０００８】 そこで本実施例は、図に示すように、ボールベアリングの軸挿入側と反対側の 側面部にはベアリング外輪22Ｂの側面部の端縁に円形皿型の薄板状シール23をカ シメ等の工法で接合して、ベアリング内輪22Ａ，該内輪と外輪との間隙にあるボ ール収容部を覆い、それらの個所から飛散するグリースを阻止している。また同 ベアリングの軸挿入側では、ボール収容部を覆うように輪形の磁性流体シール24 をデイスク外輪22Ｂに固定している。Therefore, in the present embodiment, as shown in the figure, a circular plate-shaped thin plate-shaped seal 23 is caulked on the side surface of the ball bearing on the side opposite to the shaft insertion side at the end edge of the side surface of the bearing outer ring 22B. The bearing inner ring 22A and the ball accommodating portion in the gap between the inner ring and the outer ring are covered with each other by joining the bearing inner ring 22A and the grease to prevent them from splashing. On the shaft insertion side of the bearing, a ring-shaped magnetic fluid seal 24 is fixed to the disc outer ring 22B so as to cover the ball accommodating portion.

【０００９】 この磁性流体シール24は、周知のように二枚の磁性板24Ａ間に磁石24Ｂを介在 させ、かつ各磁性板の固定部とは反対側の自由端部に磁性流体24を磁着し、該磁 性流体をベアリング内輪22Ａの内壁に密着させるようになっている。この磁性流 体はベアリング内輪と密着するも接触抵抗が小さいためベアリング外輪22Ｂの回 転には何ら支障をきたさない。かくしてこの磁性流体シール24により、軸挿入側 でのグリースの飛散を完全に防ぎキャリッジ12ヘの付着を防止する。As is well known, the magnetic fluid seal 24 has a magnet 24B interposed between two magnetic plates 24A, and the magnetic fluid 24 is magnetically attached to the free end of each magnetic plate opposite to the fixed portion. However, the magnetic fluid is brought into close contact with the inner wall of the bearing inner ring 22A. Although this magnetic fluid is in close contact with the inner ring of the bearing, it has a small contact resistance, so that it does not hinder the rotation of the outer ring 22B of the bearing. Thus, the magnetic fluid seal 24 completely prevents the grease from scattering on the shaft insertion side and prevents the grease from adhering to the carriage 12.

【００１０】 以上、この考案の一実施例について説明したが、これとは反対にキャリッジを 案内するガイドレール側に設けたころがり軸受に対しても同様に適用できる。Although one embodiment of the present invention has been described above, on the contrary, the present invention can be similarly applied to a rolling bearing provided on the guide rail side for guiding the carriage.

【００１１】[0011]

【考案の効果】[Effect of the device]

以上の説明から明らかなように、この考案のヘッド位置決め機構のころがり軸 受によれば、ディスク収容空間へのグリース飛散が防止でき、同空間を清浄化で きるので、安定したヘッドの低浮上を要求される磁気ディスク装置などに適用し て有益である。 As is clear from the above description, the rolling bearing of the head positioning mechanism of the present invention can prevent grease from splashing into the disk storage space and clean the space, thus ensuring stable low head flying. It is useful when applied to required magnetic disk devices.

【図面の簡単な説明】[Brief description of drawings]

【図１】この考案に係るヘッド位置決め機構のころがり
軸受の一実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing an embodiment of a rolling bearing of a head positioning mechanism according to the present invention.

【図２】磁気ディスク装置のヘッド位置決め機構の１例
を示す側面図である。FIG. 2 is a side view showing an example of a head positioning mechanism of a magnetic disk device.

【符号の説明】[Explanation of symbols]

12 キャリッジ 14 ガイドレール 21 固定軸 22 ボールベアリング 22Ａ ベアリング内輪 22Ｂ ベアリング外輪 23 薄板状シール 24 磁性流体シール 24Ａ 磁性板 24Ｂ 磁石 24Ｃ 磁性流体 12 Carriage 14 Guide rail 21 Fixed shaft 22 Ball bearing 22A Bearing inner ring 22B Bearing outer ring 23 Thin plate seal 24 Magnetic fluid seal 24A Magnetic plate 24B Magnet 24C Magnetic fluid

───────────────────────────────────────────────────── フロントページの続き (72)考案者 有賀 敬治 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Keiji Ariga 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (1)

【実用新案登録請求の範囲】 【請求項１】ディスク上の所定トラックへキャリッジ(1
2)に搭載したヘッド(11)を位置決めするヘッド位置決め
機構のころがり軸受であって、 該ころがり軸受は前記キャリッジ(12)か、それを案内す
る固定台(14)のいずれかに取付けた固定軸(21)に支持さ
れたボールベアリング(22)を主体として成り、 該ボールベアリング(22)の軸挿入側と反対側の側面部に
はベアリング内輪 (22Ａ) とボール収容部を覆うように
薄板状シール(23)がベアリング外輪 (22Ｂ）の端縁部に
固着され、同ベアリングの軸挿入側の側面部にはボール
収容部を覆うように輪形の磁性流体シール(24)がベアリ
ング外輪に固着されていることを特徴とするヘッド位置
決め機構のころがり軸受。[Claims for utility model registration] [Claim 1] Carriage (1
A rolling bearing of a head positioning mechanism for positioning the head (11) mounted in 2), the rolling bearing being a fixed shaft attached to either the carriage (12) or a fixed base (14) for guiding it. It is mainly composed of a ball bearing (22) supported by (21), and the side surface of the ball bearing (22) opposite to the shaft insertion side has a thin plate shape so as to cover the bearing inner ring (22A) and the ball accommodating portion. A seal (23) is fixed to the edge of the bearing outer ring (22B), and a ring-shaped magnetic fluid seal (24) is fixed to the outer ring of the bearing on the side of the shaft insertion side of the bearing so as to cover the ball receiving portion. The rolling bearing of the head positioning mechanism is characterized in that
JP1992042961U 1992-06-22 1992-06-22 Roller bearing for head positioning mechanism Expired - Lifetime JP2548776Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1992042961U JP2548776Y2 (en) 1992-06-22 1992-06-22 Roller bearing for head positioning mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1992042961U JP2548776Y2 (en) 1992-06-22 1992-06-22 Roller bearing for head positioning mechanism

Publications (2)

Publication Number Publication Date
JPH054359U true JPH054359U (en) 1993-01-22
JP2548776Y2 JP2548776Y2 (en) 1997-09-24

Family

ID=12650634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1992042961U Expired - Lifetime JP2548776Y2 (en) 1992-06-22 1992-06-22 Roller bearing for head positioning mechanism

Country Status (1)

Country Link
JP (1) JP2548776Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02104972U (en) * 1989-02-06 1990-08-21

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819748U (en) * 1981-07-30 1983-02-07 井関農機株式会社 Finished rice sorting device in huller sorting machine
JPS58220275A (en) * 1982-06-16 1983-12-21 Toshiba Corp Magnetic head driver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819748U (en) * 1981-07-30 1983-02-07 井関農機株式会社 Finished rice sorting device in huller sorting machine
JPS58220275A (en) * 1982-06-16 1983-12-21 Toshiba Corp Magnetic head driver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02104972U (en) * 1989-02-06 1990-08-21

Also Published As

Publication number Publication date
JP2548776Y2 (en) 1997-09-24

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