JP2002374648A - Magnetic disc drive - Google Patents
Magnetic disc driveInfo
- Publication number
- JP2002374648A JP2002374648A JP2002094162A JP2002094162A JP2002374648A JP 2002374648 A JP2002374648 A JP 2002374648A JP 2002094162 A JP2002094162 A JP 2002094162A JP 2002094162 A JP2002094162 A JP 2002094162A JP 2002374648 A JP2002374648 A JP 2002374648A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- diameter portion
- peripheral surface
- spindle shaft
- motor
- 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
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
- 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
- F16C19/08—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 two or more rows of balls
Landscapes
- Rolling Contact Bearings (AREA)
- Rotational Drive Of Disk (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明の磁気ディスク装置は主と
してＯＡ機器に使用する。BACKGROUND OF THE INVENTION The magnetic disk drive of the present invention is mainly used for OA equipment.
【０００２】[0002]
【従来の技術】磁気ディスク装置のモータには例えばス
ピンドルモータが使用されるが、同モータは、図１０に
示すように、スピンドル軸、ロータ（ロータヨーク）、
ヨークホルダを備え、またスピンドル軸が、軸受本体の
スリーブ内に設けられた内外輪よりなる玉軸受にて支承
されているが、これらの各部品はそれぞれ独立の単品で
構成されている。2. Description of the Related Art As a motor of a magnetic disk drive, for example, a spindle motor is used. As shown in FIG. 10, the motor has a spindle shaft, a rotor (rotor yoke),
A yoke holder is provided, and the spindle shaft is supported by ball bearings including inner and outer rings provided in a sleeve of the bearing main body. Each of these components is configured as an independent unit.
【０００３】[0003]
【発明が解決しようとする課題】このように、磁気ディ
スク装置の従来のモータは各部品がそれぞれ単品として
独立に構成されているので、部品点数の多いものとなっ
ており、しかも製作時にはこれらの部品の相互の組付工
程が必要で、製作工数が大となり、製造コストが高くつ
くという欠点がある。As described above, the conventional motor of the magnetic disk drive has a large number of components because each component is independently configured as a single component. There is a drawback in that a mutual assembling process of the parts is required, the number of manufacturing steps is increased, and the manufacturing cost is high.
【０００４】本発明は、モータ部品の一部と軸受の一部
分を一体で作ることにより、部品点数、組立工数が少な
くて、製造コストの低減を期することができ、また、モ
ータの軸振れ精度が向上させられて、記録密度の高い信
頼性に優れた磁気ディスク装置を提供できるようにした
ことを目的とする。According to the present invention, by integrally forming a part of a motor part and a part of a bearing, the number of parts and the number of assembling steps are reduced, the production cost can be reduced, and the shaft runout accuracy of the motor can be reduced. Therefore, it is an object of the present invention to provide a magnetic disk device having high recording density and excellent reliability.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１に係る磁気ディスク装置は、大径
部と小径部を有する２段軸よりなるスピンドル軸が玉軸
受本体のスリーブ内に設けられ、前記スピンドル軸の小
径部に内輪を設けて、該内輪の外周面に形成した転動溝
と前記スリーブの内周面に形成した転動溝との間に複数
のボールを設け、また、前記スピンドル軸の大径部の外
周面に形成した転動溝と前記スリーブの内周面に形成し
た転動溝との間に複数のボールを設けてなる玉軸受本体
の前記スリーブとモータ部品たるロータとを同一材にて
一体に構成したモータを備えてなる構成のものとしてあ
る。In order to achieve the above object, a magnetic disk drive according to a first aspect of the present invention is characterized in that a spindle shaft composed of a two-stage shaft having a large-diameter portion and a small-diameter portion has a ball bearing main body. An inner ring is provided in a small diameter portion of the spindle shaft provided in a sleeve, and a plurality of balls are provided between a rolling groove formed on an outer peripheral surface of the inner ring and a rolling groove formed on an inner peripheral surface of the sleeve. The sleeve of the ball bearing body, wherein a plurality of balls are provided between a rolling groove formed on an outer peripheral surface of a large diameter portion of the spindle shaft and a rolling groove formed on an inner peripheral surface of the sleeve. And a rotor which is a motor component integrally formed of the same material.
【０００６】本発明の請求項２に係る磁気ディスク装置
は、大径部と小径部を有する２段軸よりなるスピンドル
軸が玉軸受本体のスリーブ内に設けられ、前記スピンド
ル軸の小径部に内輪を設けて、該内輪の外周面に形成し
た転動溝と前記スリーブの内周面に形成した転動溝との
間に複数のボールを設け、また、前記スピンドル軸の大
径部の外周面に形成した転動溝と前記スリーブの内周面
に形成した転動溝との間に複数のボールを設けてなる玉
軸受本体の前記スピンドル軸の大径部をモータ部品たる
ロータに連接し、かつ同一材にて一体に構成したモータ
を備えてなる構成のものとしてある。In a magnetic disk drive according to a second aspect of the present invention, a spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided at the small-diameter portion of the spindle shaft. A plurality of balls are provided between a rolling groove formed on an outer peripheral surface of the inner ring and a rolling groove formed on an inner peripheral surface of the sleeve, and an outer peripheral surface of a large diameter portion of the spindle shaft is provided. A large diameter portion of the spindle shaft of a ball bearing body provided with a plurality of balls between a rolling groove formed on the inner peripheral surface of the sleeve and a rolling groove formed on the inner peripheral surface of the sleeve is connected to a rotor as a motor component, In addition, the motor includes a motor integrally formed of the same material.
【０００７】本発明の請求項３に係る磁気ディスク装置
は、大径部と小径部を有する２段軸よりなるスピンドル
軸が玉軸受本体のスリーブ内に設けられ、前記スピンド
ル軸の小径部に内輪を設けて、該内輪の外周面に形成し
た転動溝と前記スリーブの内周面に形成した転動溝との
間に複数のボールを設け、また、前記スピンドル軸の大
径部の外周面に形成した転動溝と前記スリーブの内周面
に形成した転動溝との間に複数のボールを設けてなる玉
軸受本体の前記スリーブをモータ部品たるヨークホルダ
と同一材にて一体に構成したモータを備えてなる構成の
ものとしてある。According to a third aspect of the present invention, there is provided a magnetic disk drive, wherein a spindle shaft comprising a two-stage shaft having a large diameter portion and a small diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided at the small diameter portion of the spindle shaft. A plurality of balls are provided between a rolling groove formed on an outer peripheral surface of the inner ring and a rolling groove formed on an inner peripheral surface of the sleeve, and an outer peripheral surface of a large diameter portion of the spindle shaft is provided. And the sleeve of the ball bearing body, in which a plurality of balls are provided between the rolling groove formed on the inner peripheral surface of the sleeve and the rolling groove formed on the inner surface of the sleeve, is integrally formed of the same material as a yoke holder as a motor component. This is a configuration having a motor.
【０００８】本発明の請求項４に係る磁気ディスク装置
は、大径部と小径部を有する２段軸よりなるスピンドル
軸が玉軸受本体のスリーブ内に設けられ、前記スピンド
ル軸の小径部に内輪を設けて、該内輪の外周面に形成し
た転動溝と前記スリーブの内周面に形成した転動溝との
間に複数のボールを設け、また、前記スピンドル軸の大
径部の外周面に形成した転動溝と前記スリーブの内周面
に形成した転動溝との間に複数のボールを設けてなる玉
軸受本体の前記スピンドル軸をモータ部品たるヨークホ
ルダに連接し、かつ同一材にて一体に構成したモータを
備えてなる構成のものとしてある。In a magnetic disk drive according to a fourth aspect of the present invention, a spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided at the small-diameter portion of the spindle shaft. A plurality of balls are provided between a rolling groove formed on an outer peripheral surface of the inner ring and a rolling groove formed on an inner peripheral surface of the sleeve, and an outer peripheral surface of a large diameter portion of the spindle shaft is provided. The spindle shaft of the ball bearing body having a plurality of balls provided between the rolling groove formed on the inner peripheral surface of the sleeve and the rolling groove formed on the yoke holder, which is a motor component, is connected to the same material. And an integrated motor.
【０００９】本発明の請求項５に係る磁気ディスク装置
は、大径部と小径部を有する２段軸よりなるスピンドル
軸が玉軸受本体のスリーブ内に設けられ、前記スピンド
ル軸の小径部に内輪を設けて、該内輪の外周面に形成し
た転動溝と前記スリーブの内面に形成した転動溝との間
に複数のボールを設け、また、前記スピンドル軸の大径
部の外周面に形成した転動溝と前記スリーブの内周面に
形成した転動溝との間に複数のボールを設けてなる玉軸
受本体の前記内輪をモータ部品たるヨークホルダに連接
し、かつ同一材にて一体に構成したモータを備えてなる
構成のものとしてある。In a magnetic disk drive according to a fifth aspect of the present invention, a spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided at the small-diameter portion of the spindle shaft. A plurality of balls are provided between a rolling groove formed on an outer peripheral surface of the inner ring and a rolling groove formed on an inner surface of the sleeve, and formed on an outer peripheral surface of a large diameter portion of the spindle shaft. The inner ring of the ball bearing body having a plurality of balls provided between the rolling groove formed and the rolling groove formed on the inner peripheral surface of the sleeve is connected to a yoke holder as a motor component, and integrally formed of the same material. This is a configuration including the configured motor.
【００１０】[0010]
【作用】本発明に係る磁気ディスク装置は、そのモータ
の部材たるロータやヨークホルダを軸受本体のスリーブ
やスピンドル軸あるいは内輪と一体に構成したものとし
てあるので、これらが別々の単品で構成されているもの
より部品点数が少なく、製作時の組付工数が少なくてす
む。In the magnetic disk drive according to the present invention, the rotor and the yoke holder, which are members of the motor, are integrally formed with the sleeve, the spindle shaft or the inner ring of the bearing main body. The number of parts is smaller than that of the product, and the man-hour for assembling at the time of manufacture is small.
【００１１】また、本願発明の磁気ディスク装置におけ
るスピンドル軸は大径部と小径部を有する２段軸構造と
し、小径部に内輪を設ける構成としているで、内輪の肉
厚を薄くしたり、あるいはボールの径を小径とすること
なくスピンドル軸を全体に大径のものとすることがで
き、軸の剛性が向上させられる。In the magnetic disk drive of the present invention, the spindle shaft has a two-stage shaft structure having a large-diameter portion and a small-diameter portion, and the inner ring is provided in the small-diameter portion. The spindle shaft can be made large as a whole without reducing the diameter of the ball, and the rigidity of the shaft is improved.
【００１２】さらに、組まれたモータは軸振れが少な
く、かつ熱的にも安定しているため、磁気ディスクのト
ラック密度を上げることができ、しかも面振れも少ない
ので、ヘッドの浮上高さも低く設定でき、線記録密度も
上り、その結果、磁気ディスク装置の記録密度の向上が
図れる。Further, since the assembled motor has a small shaft runout and is thermally stable, the track density of the magnetic disk can be increased, and the surface runout is small, so that the flying height of the head is low. The recording density can be set, and the linear recording density can be increased. As a result, the recording density of the magnetic disk device can be improved.
【００１３】[0013]
【実施例】以下本発明に係る磁気ディスク装置の実施例
を添付図面に示す各具体例により説明する。図１、図２
は本発明に係る磁気ディスク装置にアウタロータ型スピ
ンドルモータを使用した実施例を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the magnetic disk drive according to the present invention will be described below with reference to specific examples shown in the accompanying drawings. 1 and 2
Shows an embodiment in which an outer rotor type spindle motor is used in the magnetic disk drive according to the present invention.
【００１４】図１、図２において、符号１は磁気ディス
ク装置のケーシングで、ケーシングには、出願人会社の
独自創作に係るアウタロータ型スピンドルモータＭを設
けてあり、このモータは次の構成のものとしてある。In FIGS. 1 and 2, reference numeral 1 denotes a casing of a magnetic disk drive. The casing is provided with an outer rotor type spindle motor M according to an original creation of the applicant company. This motor has the following structure. There is.
【００１５】すなわち、前記ケーシング１のベース１ａ
に有底の筒状ヨークホルダ２を設けてあり、ヨークホル
ダのまわりには、コイル３を備えるステータヨーク４を
設けてある。That is, the base 1a of the casing 1
Is provided with a bottomed cylindrical yoke holder 2, and a stator yoke 4 having a coil 3 is provided around the yoke holder.
【００１６】ヨークホルダ２の底部中心にはスピンドル
軸５の下部を固定してあり、このスピンドル軸は上部が
小径な２段軸のものとしてある。また、スピンドル軸の
下部大径部の外周には転動溝６を形成してあり、また小
径部には外周に転動溝７を形成した内輪８を嵌めてあ
る。At the center of the bottom of the yoke holder 2, a lower portion of a spindle shaft 5 is fixed, and the upper portion of the spindle shaft is a two-stage shaft having a small diameter. A rolling groove 6 is formed on the outer periphery of the lower large-diameter portion of the spindle shaft, and an inner ring 8 having a rolling groove 7 formed on the outer periphery is fitted on the small-diameter portion.
【００１７】アウタロータたるロータ９の中央下面には
玉軸受本体のスリーブ１０をロータと一体に形成し、こ
のロータ９の内面に、スピンドル軸の大径部転動溝と前
記内輪の転動溝と対応する複列の転動溝１１、１２を形
成して、これら対応する転動溝間にそれぞれボール１
３、１４を設けることにより、スリーブ１０、ボール１
３と１４、内輪７および大径部の転動溝６で玉軸受本体
を構成し、これによりロータがスピンドル軸まわりに回
転できるように保持されており、図中の符号１５は、前
記ステータヨークと対応せしめてロータの外周フランジ
内面に設けた磁石を示す。A sleeve 10 of a ball bearing body is formed integrally with the rotor on the lower surface at the center of the rotor 9 serving as an outer rotor, and the inner surface of the rotor 9 has a large-diameter portion rolling groove of the spindle shaft and a rolling groove of the inner ring. Corresponding double rows of rolling grooves 11 and 12 are formed, and the ball 1 is inserted between the corresponding rolling grooves.
3 and 14, the sleeve 10, the ball 1
The ball bearing main body is constituted by 3 and 14, the inner race 7 and the rolling groove 6 of the large diameter portion. The ball bearing main body is held by this so that the rotor can rotate around the spindle axis. And a magnet provided on the inner surface of the outer peripheral flange of the rotor in correspondence with the above.
【００１８】図３の実施例のものは、ケーシング１のベ
ース１ａ中央部に玉軸受本体のスリーブ１０を設け、ロ
ータ９の中心部下面にスピンドル軸５を一体に設けたも
のとしてあり、スピンドル軸は２段軸であるが、上下方
向が図２のものと反対になっているだけで、スピンドル
軸の転動溝６、内輪８およびその転動溝７、スリーブの
転動溝１１と１２、ボール１３と１４との相互構造関係
は図２のものと同じである。この実施例のものではステ
ータヨーク４を前記スリーブ１０のまわりに取り付けて
あり、したがって図２のヨークホルダ２に相当する構成
は不要となる。In the embodiment shown in FIG. 3, a sleeve 10 of a ball bearing body is provided at the center of a base 1a of a casing 1, and a spindle shaft 5 is integrally provided on a lower surface of a center portion of a rotor 9. Is a two-stage shaft, but only the vertical direction is opposite to that of FIG. 2 and the rolling groove 6 of the spindle shaft, the inner ring 8 and its rolling groove 7, the rolling grooves 11 and 12 of the sleeve, The mutual structural relationship between the balls 13 and 14 is the same as that of FIG. In this embodiment, the stator yoke 4 is mounted around the sleeve 10, so that a configuration corresponding to the yoke holder 2 in FIG. 2 is not required.
【００１９】図４、図５はモータにインナーロータ型ス
ピンドルモータを使用した各例を示す。図４のものは、
ヨークホルダ２の底部中心に２段軸よりなるスピンドル
軸５を立設してあって、ヨークホルダの立ち上がり筒状
リブ２ａの内周面にステータヨーク４を取り付けてあ
る。この実施例のものでは、玉軸受本体のスリーブ１０
をロータ９の中央下面にロータと一体に形成してあり、
玉軸受本体の構造は図２の実施例のものと同じである
が、磁石はスリーブ１０の外周に設けてある。FIGS. 4 and 5 show examples in which an inner rotor type spindle motor is used as a motor. The one in FIG.
A spindle shaft 5 consisting of a two-stage shaft is provided upright at the center of the bottom of the yoke holder 2, and a stator yoke 4 is mounted on the inner peripheral surface of a rising cylindrical rib 2a of the yoke holder. In this embodiment, the sleeve 10 of the ball bearing body is used.
Is formed integrally with the rotor on the lower surface at the center of the rotor 9,
The structure of the ball bearing body is the same as that of the embodiment of FIG. 2, but the magnet is provided on the outer periphery of the sleeve 10.
【００２０】図５のものは、玉軸受本体のヨークホルダ
２を玉軸受本体のスリーブ１０と一体に、また、スピン
ドル軸５とロータ９をそれぞれ一体に構成してあって、
ステータヨーク４はヨークホルダ２の立ち上がり筒状リ
ブ２ａ内周面に、磁石１５は、ロータ９の中央部下面に
一体に成型した筒状の磁石ホルダ１６の外周に設けてあ
る。しかしてスピンドル軸には２段軸のものを使用し、
玉軸受本体は図３の実施例と同じ構造のものとしてあ
る。In FIG. 5, the yoke holder 2 of the ball bearing body is integrally formed with the sleeve 10 of the ball bearing body, and the spindle shaft 5 and the rotor 9 are integrally formed.
The stator yoke 4 is provided on the inner circumferential surface of the rising cylindrical rib 2 a of the yoke holder 2, and the magnet 15 is provided on the outer circumference of a cylindrical magnet holder 16 integrally formed on the lower surface of the center of the rotor 9. So, use a two-stage spindle for the spindle,
The ball bearing body has the same structure as the embodiment of FIG.
【００２１】なお、符号１８はロータに装着した磁気デ
ィスク、１９はヘッドアーム２０の先端下面に設けた磁
気ヘッド、２１は装置の上蓋を示す。Reference numeral 18 denotes a magnetic disk mounted on the rotor, 19 denotes a magnetic head provided on the lower surface of the tip of a head arm 20, and 21 denotes an upper cover of the apparatus.
【００２２】上記実施例のもののほかに、モータの部材
たるロータやヨークホルダを玉軸受本体のスリーブやス
ピンドル軸あるいは内輪と一体に形成するバリエーショ
ンは多数あり、その一例を以下に略述する。In addition to the above embodiment, there are many variations in which the rotor and the yoke holder, which are members of the motor, are formed integrally with the sleeve, the spindle shaft or the inner ring of the ball bearing body, and one example thereof will be briefly described below.
【００２３】図６はロータ９と玉軸受本体のスリーブ１
０とを一体に形成したものを示し、図７はヨークホルダ
２を玉軸受本体のスリーブ１０と、図８はヨークホルダ
２を玉軸受本体の内輪８と一体に、図９はヨークホルダ
２をスピンドル軸と一体に形成した例を示す。FIG. 6 shows the rotor 9 and the sleeve 1 of the ball bearing body.
FIG. 7 shows the yoke holder 2 integrated with the sleeve 10 of the ball bearing body, FIG. 8 shows the yoke holder 2 integrated with the inner ring 8 of the ball bearing body, and FIG. An example in which they are formed integrally is shown.
【００２４】[0024]
【発明の効果】本発明の装置に使用するモータは、モー
タの部材たるロータやヨークホルダを軸受本体における
スリーブやスピンドル軸あるいは内輪と一体に形成して
あるので、ロータやヨークホルダを軸受本体と別に構成
してある従来のものと異なり、製作時の組立てが容易
で、機械による組立てを効率よく行なうことができ、製
造コストを低減できるという工業生産上の大なるメリッ
トがある。According to the motor used in the apparatus of the present invention, the rotor and the yoke holder, which are members of the motor, are formed integrally with the sleeve, the spindle shaft or the inner ring of the bearing body, so that the rotor and the yoke holder are formed separately from the bearing body. Unlike the prior art, there is a great advantage in industrial production that the assembling at the time of manufacturing is easy, the assembling by a machine can be performed efficiently, and the manufacturing cost can be reduced.
【００２５】また、ロータやヨークホルダ等のモータ部
品のいずれかは玉軸受本体のスリーブやスピンドル軸あ
るいは内輪と予め一体に形成されているので、モータ
は、製作時において前記部品に対するスピンドル軸の芯
出しが不要であり、軸振れの少ない、回転精度の高いも
のとなっている。Further, since any of the motor components such as the rotor and the yoke holder are formed integrally with the sleeve of the ball bearing body, the spindle shaft or the inner ring in advance, the motor is aligned with the spindle shaft at the time of manufacture. Are unnecessary, the shaft runout is small, and the rotation accuracy is high.
【００２６】さらに、本願発明の磁気ディスク装置にお
けるスピンドル軸は大径部と小径部を有する２段軸構造
とし、小径部に内輪を設ける構成としているで、内輪の
肉厚を薄くしたり、あるいはボールの径を小径とするこ
となくスピンドル軸を全体に大径のものとすることがで
き、軸の剛性を向上させることができる。Furthermore, the spindle shaft in the magnetic disk drive of the present invention has a two-stage shaft structure having a large-diameter portion and a small-diameter portion, and the inner ring is provided in the small-diameter portion, so that the thickness of the inner ring can be reduced. The spindle shaft can be made large as a whole without reducing the diameter of the ball, and the rigidity of the shaft can be improved.
【００２７】したがって本発明によれば、モータの主要
部が軸受本体の一部と一体部品となっていて軸振れが少
なく、かつ熱的にも安定しているため、磁気ディスクと
磁気ヘッド間におけるデータ受け渡しの信頼性が向上し
て、磁気ディスクのトラック密度を上げることができ、
また磁気ディスクの面振れも少ないため、磁気ヘッドの
浮上高さも低く設定でき、線記録密度も上がり、その結
果、記録密度の高い信頼性に優れた磁気ディスク装置を
提供できる。Therefore, according to the present invention, since the main part of the motor is an integral part of a part of the bearing main body, the shaft runout is small and it is thermally stable. The reliability of data transfer is improved, and the track density of the magnetic disk can be increased,
In addition, since the surface deflection of the magnetic disk is small, the flying height of the magnetic head can be set low, and the linear recording density can be increased. As a result, a magnetic disk device with high recording density and excellent reliability can be provided.
【００２８】また、本発明の請求項１乃至４に係る装置
の軸受本体においては、２段軸の小径部に嵌めた内輪へ
その軸線方向から加圧してプリロードを付与できるの
で、プリロードを適正かつ容易に掛けることができると
いう製作上の利点がある。In the bearing body of the device according to the first to fourth aspects of the present invention, the preload can be applied to the inner race fitted to the small diameter portion of the two-stage shaft by applying a pressure from the axial direction thereof, so that the preload can be properly performed. There is a manufacturing advantage that it can be easily hung.
【図１】本発明に係る磁気ディスク装置の平面図。FIG. 1 is a plan view of a magnetic disk drive according to the present invention.
【図２】本発明の第１実施例を示す縦断面図。FIG. 2 is a longitudinal sectional view showing a first embodiment of the present invention.
【図３】本発明の第２実施例を示す縦断面図。FIG. 3 is a longitudinal sectional view showing a second embodiment of the present invention.
【図４】本発明の第３実施例を示す縦断面図。FIG. 4 is a longitudinal sectional view showing a third embodiment of the present invention.
【図５】本発明の第４実施例を示す縦断面図。FIG. 5 is a longitudinal sectional view showing a fourth embodiment of the present invention.
【図６】本発明の第５実施例を示す縦断面図。FIG. 6 is a longitudinal sectional view showing a fifth embodiment of the present invention.
【図７】本発明の第６実施例を示す縦断面図。FIG. 7 is a longitudinal sectional view showing a sixth embodiment of the present invention.
【図８】本発明の第７実施例を示す縦断面図。FIG. 8 is a longitudinal sectional view showing a seventh embodiment of the present invention.
【図９】本発明の第８実施例を示す縦断面図。FIG. 9 is a longitudinal sectional view showing an eighth embodiment of the present invention.
【図１０】従来のスピンドルモータを示す一部縦断面
図。FIG. 10 is a partial longitudinal sectional view showing a conventional spindle motor.
１ ケーシング １ａ ベース ２ ヨークホルダ ２ａ 筒状リブ ３ コイル ４ ステータヨーク ５ スピンドル軸 ６、７ 転動溝 ８ 内輪 ９ ロータ １０ スリーブ １１、１２ 転動溝 １３、１４ ボール １５ 磁石 １６ 磁石ホルダ １７ 外輪 １８ 磁気ディスク １９ 磁気ヘッド ２０ ヘッドアーム ２１ 上蓋 Ｍ モータ Reference Signs List 1 casing 1a base 2 yoke holder 2a tubular rib 3 coil 4 stator yoke 5 spindle shaft 6, 7 rolling groove 8 inner ring 9 rotor 10 sleeve 11, 12 rolling groove 13, 14 ball 15 magnet 16 magnet holder 17 outer ring 18 magnetic disk 19 Magnetic Head 20 Head Arm 21 Top Cover M Motor
【手続補正書】[Procedure amendment]
【提出日】平成１４年４月１日（２００２．４．１）[Submission date] April 1, 2002 (2002.4.1)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【書類名】 明細書[Document Name] Statement
【発明の名称】 磁気ディスク装置[Title of the Invention] Magnetic disk drive
【特許請求の範囲】[Claims]
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明の磁気ディスク装置は主と
してＯＡ機器に使用する。BACKGROUND OF THE INVENTION The magnetic disk drive of the present invention is mainly used for OA equipment.
【０００２】[0002]
【従来の技術】磁気ディスク装置のモータには例えばス
ピンドルモータが使用されるが、同モータは、図３に示
すように、スピンドル軸、ロータ（ロータヨーク）、ヨ
ークホルダを備え、またスピンドル軸が、軸受本体のス
リーブ内に設けられた内外輪よりなる玉軸受にて支承さ
れているが、これらの各部品はそれぞれ独立の単品で構
成されている。2. Description of the Related Art As a motor of a magnetic disk drive, for example, a spindle motor is used . As shown in FIG. 3 , the motor includes a spindle shaft, a rotor (rotor yoke), and a yoke holder. These parts are supported by ball bearings formed of inner and outer rings provided in a sleeve of the main body, and each of these components is formed as an independent single item.
【０００３】[0003]
【発明が解決しようとする課題】このように、磁気ディ
スク装置の従来のモータは各部品がそれぞれ単品として
独立に構成されているので、部品点数の多いものとなっ
ており、しかも製作時にはこれらの部品の相互の組付工
程が必要で、製作工数が大となり、製造コストが高くつ
くという欠点がある。As described above, the conventional motor of the magnetic disk drive has a large number of components because each component is independently configured as a single component. There is a drawback in that a mutual assembling process of the parts is required, the number of manufacturing steps is increased, and the manufacturing cost is high.
【０００４】本発明は、モータ部品の一部であるロータ
と軸受の一部分であるスリーブを一体で作ることによ
り、部品点数、組立工数が少なくて、製造コストの低減
を期することができ、また、モータの軸振れ精度が向上
させられて、記録密度の高い信頼性に優れた磁気ディス
ク装置を提供できるようにしたことを目的とする。[0004] The present invention is to reduce the number of parts and the number of assembling steps and to reduce the manufacturing cost by integrally forming a rotor which is a part of a motor part and a sleeve which is a part of a bearing. Further, it is an object of the present invention to provide a magnetic disk device having a high recording density and excellent reliability by improving the shaft runout accuracy of a motor.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る磁気ディスク装置は、ベースの中央に
有底の筒状ヨークホルダを備え、このヨークホルダの外
周面に、コイルを備えるステータヨークを設け、ヨーク
ホルダの内側に、大径部に続いて上部に小径部を有する
２段軸よりなり、大径部の下端に大径部よりも小径な取
付軸部を有するスピンドル軸が玉軸受本体のスリーブ内
に設けられ、前記スピンドル軸の小径部に内輪を設け
て、該内輪の外周面に形成した転動溝と前記スリーブの
内周面に形成した転動溝との間に複数のボールを設け、
また、前記スピンドル軸の大径部の外周面に形成した転
動溝と前記スリーブの内周面に形成した転動溝との間に
複数のボールを設けてなる玉軸受本体を備え、前記スリ
ーブとモータ部品たるロータとを同一材にて一体に形成
し、前記ロータの内周面に設けられた磁石の内周面に前
記ステータヨークの外周を相対せしめ、前記スピンドル
軸の取付軸部をヨークホルダの底部中央に固定してなる
アウタロータ型モータを備えてなる構成のものとしてあ
る。 In order to achieve the above object, a magnetic disk drive according to the present invention is provided at a center of a base.
A cylindrical yoke holder with a bottom is provided.
A stator yoke having a coil is provided on the peripheral surface, and the yoke is provided.
Inside the holder, Ri name than 2 stepped shaft having a small diameter portion at the top followed by the large-diameter portion, a small diameter preparative than the large diameter portion at the lower end of the large diameter portion
Spindle shaft that having a biasing shaft portion is provided in the sleeve of the ball bearing body, the inner ring is provided on the small diameter portion of the spindle shaft, the inner peripheral surface of the rolling groove and the sleeve which is formed on the outer peripheral surface of the inner race A plurality of balls are provided between the rolling grooves formed in
Also includes a ball bearing body formed by a plurality of balls between the grooves formed on the inner peripheral surface of the rolling groove and the sleeve which is formed on the outer peripheral surface of the large diameter portion of said spindle shaft, said sleeve And the rotor as motor parts are integrally formed of the same material
And a magnet provided on the inner peripheral surface of the rotor.
The outer periphery of the stator yoke is opposed to the
The mounting shaft of the shaft is fixed to the center of the bottom of the yoke holder
The configuration includes an outer rotor type motor.
【０００６】[0006]
【作用】本発明に係る磁気ディスク装置は、そのモータ
の部材たるロータを軸受本体のスリーブと一体に構成し
たものとしてあるので、これらが別々の単品で構成され
ているものより部品点数が少なく、製作時の組付工数が
少なくてすむ。 In the magnetic disk drive according to the present invention, the rotor, which is a member of the motor, is formed integrally with the sleeve of the bearing body. Less assembly man-hours at the time of production.
【０００７】 また、本願発明の磁気ディスク装置におけ
るスピンドル軸は大径部と小径部を有する２段軸構造と
し、小径部に内輪を設ける構成としているので、内輪の
肉厚を薄くしたり、あるいはボールの径を小径とするこ
となくスピンドル軸を全体に大径のものとすることがで
き、軸の剛性が向上させられる。 [0007] The spindle shaft in the magnetic disk device of the present invention a two-stage shaft structure having a large diameter portion and a small diameter portion, than has a configuration provided with inner small-diameter portion, or the wall thickness of the inner ring, Alternatively, the spindle shaft can be made to have a large diameter without reducing the diameter of the ball, thereby improving the rigidity of the shaft.
【０００８】 さらに、組まれたモータは軸振れが少な
く、かつ熱的にも安定しているため、磁気ディスクのト
ラック密度を上げることができ、しかも面振れも少ない
ので、ヘッドの浮上高さも低く設定でき、線記録密度も
上り、その結果、磁気ディスク装置の記録密度の向上が
図れる。 Furthermore, braided motor less axial runout, and because it is also stable thermally, it is possible to increase the track density of the magnetic disk, and since surface vibration is small, the flying height of the head is low The recording density can be set, and the linear recording density can be increased. As a result, the recording density of the magnetic disk device can be improved.
【０００９】[0009]
【実施例】以下本発明に係る磁気ディスク装置の実施例
を添付図面に示す具体例により説明する。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic disk drive according to the present invention will be described below with reference to a specific example shown in the accompanying drawings.
【００１０】 図１、図２において、符号１は磁気ディス
ク装置のケーシングで、ケーシングには、出願人会社の
独自創作に係るアウタロータ型スピンドルモータを設け
てあり、このモータは次の構成のものとしてある。 In FIGS. 1 and 2, reference numeral 1 denotes a casing of a magnetic disk drive. The casing is provided with an outer rotor type spindle motor according to an original creation of the applicant company. The motor has the following structure. is there.
【００１１】 すなわち、前記ケーシング１のベース１ａ
に有底の筒状ヨークホルダ２を設けてあり、ヨークホル
ダのまわりには、コイル３を備えるステータヨーク４を
設けてある。 [0011] That is, the base 1a of the casing 1
Is provided with a bottomed cylindrical yoke holder 2, and a stator yoke 4 having a coil 3 is provided around the yoke holder.
【００１２】 ヨークホルダ２の底部中心にはスピンドル
軸５の下部における取付軸部を固定してあり、このスピ
ンドル軸は大径部に続いて上部が小径な２段軸のものと
してあり、前記取付軸部は大径部よりも径を小ならしめ
てある。また、スピンドル軸の下部大径部の外周には転
動溝６を形成してあり、また小径部には外周に転動溝７
を形成した内輪８を嵌めてある。 [0012] At the bottom center of the yoke holder 2 are fixed to the mounting shaft portion of the lower portion of the spindle shaft 5, the spindle shaft has an upper Following large-diameter portion located as a small two-stage shaft, wherein the mounting shaft The part is smaller in diameter than the large diameter part
It is. A rolling groove 6 is formed on the outer periphery of the lower large diameter portion of the spindle shaft, and a rolling groove 7 is formed on the outer periphery of the small diameter portion.
The inner ring 8 formed is fitted.
【００１３】 アウタロータたるロータ９の中央下面には
玉軸受本体のスリーブ１０をロータと一体に形成し、こ
のスリーブ１０の内面に、スピンドル軸の大径部転動溝
と前記内輪の転動溝と対応する複列の転動溝１１、１２
を形成して、これら対応する転動溝間にそれぞれボール
１３、１４を設けることにより、スリーブ１０、ボール
１３と１４、内輪７および大径部の転動溝６で玉軸受本
体を構成し、これによりロータがスピンドル軸まわりに
回転できるように保持されており、図中の符号１５は、
前記ステータヨークと対応せしめてロータの外周フラン
ジ内面に設けた磁石を示す。 [0013] The central lower surface of the outer rotor serving rotor 9 form the sleeve 10 of the ball bearing body rotor integrally, the inner surface of the sleeve 10, and the inner ring of the rolling groove and the large diameter portion rolling groove of the spindle shaft Corresponding double row rolling grooves 11, 12
By forming balls 13 and 14 between the corresponding rolling grooves, respectively, a ball bearing main body is constituted by the sleeve 10, the balls 13 and 14, the inner ring 7 and the rolling groove 6 of the large diameter portion, As a result, the rotor is held so as to be able to rotate around the spindle axis.
2 shows a magnet provided on an inner surface of an outer peripheral flange of a rotor in correspondence with the stator yoke.
【００１４】 なお、符号１８はロータに装着した磁気デ
ィスク、１９はヘッドアーム２０の先端下面に設けた磁
気ヘッド、２１は装置の上蓋を示す。 Reference numeral 18 denotes a magnetic disk mounted on the rotor, 19 denotes a magnetic head provided on the lower surface of the tip of a head arm 20, and 21 denotes an upper cover of the apparatus.
【００１５】[0015]
【発明の効果】本発明の装置に使用するモータは、モー
タの部材たるロータを軸受本体におけるスリーブと一体
に形成してあるので、ロータを軸受本体と別に構成して
ある従来のものと異なり、製作時の組立てが容易で、機
械による組立てを効率よく行なうことができ、製造コス
トを低減できるという工業生産上の大なるメリットがあ
る。 According to the motor used in the apparatus of the present invention, the rotor as a member of the motor is formed integrally with the sleeve of the bearing body. There is a great merit in industrial production that the assembling at the time of manufacturing is easy, the assembling by machine can be performed efficiently, and the manufacturing cost can be reduced.
【００１６】 また、モータ部品であるロータは玉軸受本
体のスリーブと予め一体に形成されているので、モータ
は、製作時において前記部品に対するスピンドル軸の芯
出しが不要であり、軸振れの少ない、回転精度の高いも
のとなっている。 Further , since the rotor, which is a motor component , is formed integrally with the sleeve of the ball bearing body in advance, the motor does not require centering of the spindle shaft with respect to the component at the time of manufacture, so that there is little shaft runout. The rotation accuracy is high.
【００１７】 さらに、本願発明の磁気ディスク装置にお
けるスピンドル軸は大径部と小径部を有する２段軸構造
とし、小径部に内輪を設ける構成としているで、内輪の
肉厚を薄くしたり、あるいはボールの径を小径とするこ
となくスピンドル軸を全体に大径のものとすることがで
き、軸の剛性を向上させることができる。 Furthermore, the spindle axis in the magnetic disk device of the present invention is a two-stage shaft structure having a large diameter portion and a small diameter portion, in which a configuration in which the inner ring diameter portion, or the wall thickness of the inner ring, or The spindle shaft can be made large as a whole without reducing the diameter of the ball, and the rigidity of the shaft can be improved.
【００１８】 したがって本発明によれば、モータの主要
部が軸受本体の一部と一体部品となっていて軸振れが少
なく、かつ熱的にも安定しているため、磁気ディスクと
磁気ヘッド間におけるデータ受け渡しの信頼性が向上し
て、磁気ディスクのトラック密度を上げることができ、
また磁気ディスクの面振れも少ないため、磁気ヘッドの
浮上高さも低く設定でき、線記録密度も上がり、その結
果、記録密度の高い信頼性に優れた磁気ディスク装置を
提供できる。 [0018] Thus, according to the present invention, since the main part of the motor is stable even in they become an integral part and a part of the bearing body less axial runout, and thermal, between the magnetic disk and the magnetic head The reliability of data transfer is improved, and the track density of the magnetic disk can be increased,
In addition, since the surface deflection of the magnetic disk is small, the flying height of the magnetic head can be set low, and the linear recording density can be increased. As a result, a magnetic disk device with high recording density and excellent reliability can be provided.
【００１９】 また、本発明に係る装置の軸受本体におい
ては、２段軸の小径部に嵌めた内輪へその軸線方向から
加圧してプリロードを付与できるので、プリロードを適
正かつ容易に掛けることができるという製作上の利点が
ある。 Further, in the bearing body of the device according to the present invention, the inner ring fitted to the small diameter portion of the two-stage shaft can be preloaded by applying pressure from the axial direction thereof, so that the preload can be appropriately and easily applied. There is a manufacturing advantage.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明に係る磁気ディスク装置の平面図。FIG. 1 is a plan view of a magnetic disk drive according to the present invention.
【図２】本発明の実施例を示す縦断面図。 FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention.
【図３】 従来のスピンドルモータを示す一部縦断面図。 FIG. 3 is a partial longitudinal sectional view showing a conventional spindle motor.
【符号の説明】 １ ケーシング １ａ ベース ２ ヨークホルダ ３ コイル ４ ステータヨーク ５ スピンドル軸 ６、７ 転動溝 ８ 内輪 ９ ロータ １０ スリーブ １１、１２ 転動溝 １３、１４ ボール １５ 磁石 １８ 磁気ディスク １９ 磁気ヘッド ２０ ヘッドアーム ２１ 上蓋DESCRIPTION OF REFERENCE NUMERALS 1 casing 1a base 2 yoke holder 3 coil 4 stator yoke 5 spindle shaft 6, 7 rolling groove 8 inner ring 9 rotor 10 sleeve 11, 12 rolling groove 13, 14 ball 15 magnet 18 magnetic disk 19 magnetic head 20 Head arm 21 top lid
【手続補正２】[Procedure amendment 2]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】全図[Correction target item name] All figures
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図１】 FIG.
【図２】 FIG. 2
【図３】 FIG. 3
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｋ 7/08 Ｈ０２Ｋ 7/08 Ｂ 21/14 21/14 Ｍ 21/22 21/22 Ｍ Ｆターム(参考） 3J101 AA02 AA43 AA54 BA54 BA77 GA53 5D109 BA03 BA13 BA17 BA18 BA20 BA25 BB03 BB12 BB13 BB16 BB21 5H605 AA07 AA08 BB05 BB10 BB14 BB19 CC04 EB02 EB10 EB16 5H607 AA11 AA12 BB01 BB07 BB09 BB14 BB17 BB25 CC05 DD14 GG01 GG02 GG08 5H621 GA01 JK13 JK19 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H02K 7/08 H02K 7/08 B 21/14 21/14 M 21/22 21/22 MF term (reference) ) 3J101 AA02 AA43 AA54 BA54 BA77 GA53 5D109 BA03 BA13 BA17 BA18 BA20 BA25 BB03 BB12 BB13 BB16 BB21 5H605 AA07 AA08 BB05 BB10 BB14 BB19 CC04 EB02 EB10 EB16 5H607 AA11 AA05 BB01 BB07 BB01 BB01 BB07 BB01 BB07
Claims (5)
ピンドル軸が玉軸受本体のスリーブ内に設けられ、前記
スピンドル軸の小径部に内輪を設けて、該内輪の外周面
に形成した転動溝と前記スリーブの内周面に形成した転
動溝との間に複数のボールを設け、また、前記スピンド
ル軸の大径部の外周面に形成した転動溝と前記スリーブ
の内周面に形成した転動溝との間に複数のボールを設け
てなる玉軸受本体の前記スリーブとモータ部品たるロー
タとを同一材にて一体に構成したモータを備えてなる磁
気ディスク装置。1. A spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided on the small-diameter portion of the spindle shaft and formed on an outer peripheral surface of the inner ring. A plurality of balls are provided between the rolling groove formed on the inner peripheral surface of the sleeve and the rolling groove formed on the inner peripheral surface of the sleeve. A magnetic disk drive comprising a motor in which the sleeve of a ball bearing main body having a plurality of balls provided between rolling grooves formed on a peripheral surface and a rotor as a motor component are integrally formed of the same material.
ピンドル軸が玉軸受本体のスリーブ内に設けられ、前記
スピンドル軸の小径部に内輪を設けて、該内輪の外周面
に形成した転動溝と前記スリーブの内周面に形成した転
動溝との間に複数のボールを設け、また、前記スピンド
ル軸の大径部の外周面に形成した転動溝と前記スリーブ
の内周面に形成した転動溝との間に複数のボールを設け
てなる玉軸受本体の前記スピンドル軸の大径部をモータ
部品たるロータに連接し、かつ同一材にて一体に構成し
たモータを備えてなる磁気ディスク装置。2. A spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided on the small-diameter portion of the spindle shaft and formed on an outer peripheral surface of the inner ring. A plurality of balls are provided between the rolling groove formed on the inner peripheral surface of the sleeve and the rolling groove formed on the inner peripheral surface of the sleeve. A motor in which a large diameter portion of the spindle shaft of a ball bearing body provided with a plurality of balls between rolling grooves formed on a peripheral surface is connected to a rotor serving as a motor component, and is integrally formed of the same material. A magnetic disk drive provided.
ピンドル軸が玉軸受本体のスリーブ内に設けられ、前記
スピンドル軸の小径部に内輪を設けて、該内輪の外周面
に形成した転動溝と前記スリーブの内周面に形成した転
動溝との間に複数のボールを設け、また、前記スピンド
ル軸の大径部の外周面に形成した転動溝と前記スリーブ
の内周面に形成した転動溝との間に複数のボールを設け
てなる玉軸受本体の前記スリーブをモータ部品たるヨー
クホルダと同一材にて一体に構成したモータを備えてな
る磁気ディスク装置。3. A spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of the ball bearing body, and an inner ring is provided on the small-diameter portion of the spindle shaft and formed on an outer peripheral surface of the inner ring. A plurality of balls are provided between the rolling groove formed on the inner peripheral surface of the sleeve and the rolling groove formed on the inner peripheral surface of the sleeve. A magnetic disk drive comprising a motor in which the sleeve of a ball bearing main body having a plurality of balls provided between rolling grooves formed in a peripheral surface and a yoke holder as a motor component is integrally formed of the same material.
ピンドル軸が玉軸受本体のスリーブ内に設けられ、前記
スピンドル軸の小径部に内輪を設けて、該内輪の外周面
に形成した転動溝と前記スリーブの内周面に形成した転
動溝との間に複数のボールを設け、また、前記スピンド
ル軸の大径部の外周面に形成した転動溝と前記スリーブ
の内周面に形成した転動溝との間に複数のボールを設け
てなる玉軸受本体の前記スピンドル軸をモータ部品たる
ヨークホルダに連接し、かつ同一材にて一体に構成した
モータを備えてなる磁気ディスク装置。4. A spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of the ball bearing body, and an inner ring is provided on the small-diameter portion of the spindle shaft and formed on an outer peripheral surface of the inner ring. A plurality of balls are provided between the rolling groove formed on the inner peripheral surface of the sleeve and the rolling groove formed on the inner peripheral surface of the sleeve. A magnet comprising a motor in which the spindle shaft of a ball bearing body having a plurality of balls provided between the rolling grooves formed on the peripheral surface is connected to a yoke holder as a motor component and is integrally formed of the same material. Disk device.
ピンドル軸が玉軸受本体のスリーブ内に設けられ、前記
スピンドル軸の小径部に内輪を設けて、該内輪の外周面
に形成した転動溝と前記スリーブの内面に形成した転動
溝との間に複数のボールを設け、また、前記スピンドル
軸の大径部の外周面に形成した転動溝と前記スリーブの
内周面に形成した転動溝との間に複数のボールを設けて
なる玉軸受本体の前記内輪をモータ部品たるヨークホル
ダに連接し、かつ同一材にて一体に構成したモータを備
えてなる磁気ディスク装置。5. A spindle shaft comprising a two-stage shaft having a large-diameter portion and a small-diameter portion is provided in a sleeve of a ball bearing body, and an inner ring is provided on the small-diameter portion of the spindle shaft and formed on an outer peripheral surface of the inner ring. A plurality of balls are provided between the rolling groove formed on the inner surface of the sleeve and the rolling groove formed on the outer peripheral surface of the large diameter portion of the spindle shaft. A magnetic disk drive comprising a motor in which the inner ring of a ball bearing main body having a plurality of balls provided between the rolling grooves formed in the above-mentioned section is connected to a yoke holder as a motor component and is integrally formed of the same material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002094162A JP2002374648A (en) | 2002-03-29 | 2002-03-29 | Magnetic disc drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002094162A JP2002374648A (en) | 2002-03-29 | 2002-03-29 | Magnetic disc drive |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05787193A Division JP3312942B2 (en) | 1993-02-23 | 1993-02-23 | Magnetic disk drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002374648A true JP2002374648A (en) | 2002-12-26 |
Family
ID=19193557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002094162A Pending JP2002374648A (en) | 2002-03-29 | 2002-03-29 | Magnetic disc drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002374648A (en) |
-
2002
- 2002-03-29 JP JP2002094162A patent/JP2002374648A/en active Pending
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