JPH05126144A - Application of fixed point pre-load - Google Patents
Application of fixed point pre-loadInfo
- Publication number
- JPH05126144A JPH05126144A JP31323691A JP31323691A JPH05126144A JP H05126144 A JPH05126144 A JP H05126144A JP 31323691 A JP31323691 A JP 31323691A JP 31323691 A JP31323691 A JP 31323691A JP H05126144 A JPH05126144 A JP H05126144A
- Authority
- JP
- Japan
- Prior art keywords
- ring portion
- preload
- shaft
- load
- hub
- 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
Links
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Rolling Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、軸受部材の定位置予圧
付加方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a fixed position preload to a bearing member.
【０００２】[0002]
【従来の技術】従来、光・磁気ディスク等の記憶媒体を
回転駆動するためのスピンドルモータ等においては、記
憶媒体に関する読み／書きエラ−発生の原因となる振動
或いは騒音などを可及的に抑制するために、二組のラジ
アル型の玉軸受をシャフト（または軸）に沿って直列に
配置させている。そしてこの二組の玉軸受の軸間隔を一
定として、各々の内外輪に軸線方向へ相反した所定の荷
重を作用させることにより、これらの内外輪を固着す
る、いわゆる定位置予圧方式が採用されている。2. Description of the Related Art Conventionally, in a spindle motor or the like for rotationally driving a storage medium such as an optical / magnetic disk, the vibration or noise that causes the read / write error of the storage medium is suppressed as much as possible. In order to do so, two sets of radial type ball bearings are arranged in series along the shaft (or axis). Then, the so-called fixed position preloading method is used in which the inner and outer races are fixed by applying a predetermined axial load to the inner and outer races while keeping the axial distance between the two sets of ball bearings constant. There is.
【０００３】[0003]
【発明が解決しようとする課題】この定位置予圧方式で
は、二組の玉軸受のうち、例えば各々の外輪は予め対応
する部材（例えば回転部材）に固着させておき、次に各
々の内輪はシャフトの両端から内方へ作用する荷重が加
圧されつつ、この内輪に対応した部材（この場合はシャ
フト）に固着される。これにより、ラジアル型の玉軸受
の回転精度が高まり、振動や騒音が抑制されるというも
のである。In this fixed position preload system, for example, of the two sets of ball bearings, each outer ring is fixed to a corresponding member (for example, a rotating member) in advance, and then each inner ring is fixed. The load acting inward from both ends of the shaft is pressed, and is fixed to the member (the shaft in this case) corresponding to the inner ring. As a result, the rotational accuracy of the radial type ball bearing is improved, and vibration and noise are suppressed.
【０００４】ところが、実際には、この荷重を加圧する
ために用いられる押圧部材は、軸線方向に必ずしも押圧
されず、また玉軸受の内輪側面に均等に接触されない
等、押圧方法や押圧部材の形状バラツキを種々有してい
る。このため、玉軸受の内外輪が不完全な同芯（同軸）
状態で各々の部材へ定位置予圧により固着がなされる。
この結果、十分な回転精度が得られず、特にスピンドル
モータ等においては、非繰り返しによる回転の振れ（い
わゆるＮＲＲＯ：Ｎｏｎ ＲｅｐｅｔｉｔｉｖｅＲｕｎ
Ｏｕｔ）が大きな問題となっている。However, in reality, the pressing member used to pressurize this load is not necessarily pressed in the axial direction, and is not evenly contacted with the inner ring side surface of the ball bearing. It has various variations. For this reason, the inner and outer rings of the ball bearing are imperfectly concentric (coaxial).
In this state, the members are fixed to each member by the fixed position preload.
As a result, sufficient rotation accuracy cannot be obtained, and particularly in a spindle motor or the like, non-repetitive rotation fluctuation (so-called NRRO: Non Repetitive Run).
Out) is a big problem.
【０００５】本発明は、上記事実に鑑みてなされたもの
であり、その主目的は、定位置予圧のために所定の荷重
を付加する際、押圧部材の形状や押圧の状態等の種々の
バラツキに対しても、確実に同芯（同軸）的に玉軸受の
内輪または外輪を押圧して予圧を付加させることができ
ると共に、回転軸芯のブレを防止し、振動や騒音の発生
を効果的に抑制することが可能となる定位置予圧付加方
法を提供することである。The present invention has been made in view of the above facts, and its main purpose is to apply various variations such as the shape of the pressing member and the pressed state when a predetermined load is applied for the preloading of the fixed position. In addition, it is possible to reliably press the inner ring or outer ring of the ball bearing concentrically (coaxially) to add a preload, and to prevent the rotation axis core from shaking, effectively generating vibration and noise. The object of the present invention is to provide a method for applying a constant position preload that can suppress the above.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、静止部
材と、この静止部材に対して同軸的に相対回転する回転
部材と、の間に介在された一対の軸受部材を、軸線方向
に予め定位置に位置決めされて予圧が付加される定位置
予圧付加方法において、前記軸受部材は、前記回転部材
を回転させながら、前記静止部材に対応した前記軸受部
材の内輪部または外輪部へ予圧が付加された、ことを特
徴とする定位置予圧付加方法が提供される。According to the present invention, a pair of bearing members interposed between a stationary member and a rotating member that rotates relative to the stationary member coaxially with respect to the stationary member are provided in the axial direction. In the fixed position preload applying method in which the bearing member is positioned at a predetermined position in advance and a preload is applied, the bearing member applies a preload to an inner ring portion or an outer ring portion of the bearing member corresponding to the stationary member while rotating the rotating member. A method for adding a fixed position preload is provided.
【０００７】[0007]
【作用】回転部材を回転させながら、静止部材に対応し
た軸受部材の内輪部または外輪部（すなわち、回転部材
側が内輪部なら、静止部材側が外輪部であり、また回転
部材側が外輪部なら、静止部材側は内輪部）を押圧して
予圧を付加する。このため、各々の軸受部材は自動的に
調芯されるから、仮に予圧を付加させるための押圧部材
等が、その形状や押圧方向にバラツキを有していても、
軸受部材の該当した内輪部または外輪部へ、均等に押圧
力を作用させることができる。While rotating the rotating member, the inner ring portion or the outer ring portion of the bearing member corresponding to the stationary member (that is, if the rotating member side is the inner ring portion, the stationary member side is the outer ring portion, and if the rotating member side is the outer ring portion, it is stationary). The member side presses the inner ring part) to apply preload. Therefore, since each bearing member is automatically aligned, even if the pressing member or the like for applying the preload has variations in its shape or pressing direction,
The pressing force can be uniformly applied to the corresponding inner ring portion or outer ring portion of the bearing member.
【０００８】[0008]
【実施例】本発明に従う定位置予圧付加方法について、
添付の図面を参照しつつ説明を行なう。図１は、一例と
して光・磁気ディスク装置等に搭載され、記録ディスク
を回転駆動するためのスピンドルモータであり、その全
体断面図を示す。なお、図１において、搭載されるべき
記録ディスクは省略して示してある。まず、このスピン
ドルモータ１について、その構成を説明する。EXAMPLE A method for applying a fixed position preload according to the present invention,
The description will be made with reference to the accompanying drawings. FIG. 1 shows, as an example, a spindle motor mounted on an optical / magnetic disk device or the like for rotating a recording disk, and its entire sectional view is shown. Incidentally, in FIG. 1, the recording disk to be mounted is omitted. First, the configuration of the spindle motor 1 will be described.
【０００９】２は静止部材となすブラケットであり、略
円盤形状の本体中央部には、シャフト４が立設されて一
体に形成されている。またその外周部には、ステータ１
２が装着されるためのブラケット円筒部１１が同様に環
状に立設され一体に形成されている。３は回転部材であ
るハブであり、略椀形形状をなす。ハブ３の外壁には図
示省略の記録ディスクが搭載され、ハブ３と共に回転駆
動される。ハブ３の中央部には、シャフト４の軸芯に対
応した同軸状の円筒部３８が一体に形成されている。ま
たハブ３のハブ内周面１３には、ロータヨーク１４とロ
ータマグネット１５とが、前記ステータ１２に対向して
環状に配置され、接着等により固定されている。Reference numeral 2 denotes a bracket which serves as a stationary member, and a shaft 4 is erected and integrally formed in the central portion of the substantially disk-shaped main body. In addition, the stator 1
Similarly, a bracket cylindrical portion 11 for mounting 2 is vertically formed in an annular shape and is integrally formed. Reference numeral 3 denotes a hub which is a rotating member, and has a substantially bowl shape. A recording disk (not shown) is mounted on the outer wall of the hub 3 and is rotationally driven together with the hub 3. A coaxial cylindrical portion 38 corresponding to the axis of the shaft 4 is integrally formed at the center of the hub 3. On the hub inner peripheral surface 13 of the hub 3, a rotor yoke 14 and a rotor magnet 15 are annularly arranged so as to face the stator 12, and are fixed by adhesion or the like.
【００１０】シャフト４と、ブラケット２の円筒部３８
との間には、一対の軸受部材である玉軸受８及び玉軸受
９が介在されて設けられている。従って、回転部材であ
るハブ３は、これら玉軸受８、９により、静止部材であ
るブラケット２に対し、回転自在に支持される。そし
て、ステータ１２とロータマグネット１５との電磁気的
作用により、ハブ３はブラケット２に対して相対回転駆
動される。このスピンドルモータ１は、ブラケット２に
一体となしたシャフト４が静止する、いわゆる軸固定型
スピンドルモータの一例である。なお、２６は、ステー
タ１２のコイル線を導出するための導出部である。The shaft 4 and the cylindrical portion 38 of the bracket 2
A ball bearing 8 and a ball bearing 9 which are a pair of bearing members are provided between and. Therefore, the hub 3, which is a rotating member, is rotatably supported by the ball bearings 8 and 9 with respect to the bracket 2, which is a stationary member. The hub 3 is driven to rotate relative to the bracket 2 by the electromagnetic action of the stator 12 and the rotor magnet 15. The spindle motor 1 is an example of a so-called fixed shaft type spindle motor in which a shaft 4 integrated with a bracket 2 is stationary. Reference numeral 26 is a lead-out portion for leading out the coil wire of the stator 12.
【００１１】以下、予圧の付加方法について説明する。
図２は、図１における玉軸受８及び９が装着されている
部分を拡大して示した要部断面図である。図１及び図２
において、これらの玉軸受８及び９は、各々の内輪部及
び外輪部が、軸線方向へ相反するように所定の荷重、す
なわち予圧が加圧され、そしてそれぞれに対応した部位
に位置規制されつつ、接着等により固定されている。こ
の一対の軸受部材（玉軸受８及び９）には、いわゆる定
位置予圧が付加されて、軸受回転精度の向上を図ってい
るものである。The method of applying the preload will be described below.
FIG. 2 is an enlarged cross-sectional view of an essential part showing a portion where the ball bearings 8 and 9 in FIG. 1 are mounted. 1 and 2
In the ball bearings 8 and 9, a predetermined load, that is, a preload is applied so that the inner ring portion and the outer ring portion are opposed to each other in the axial direction, and the positions thereof are restricted to the corresponding portions, It is fixed by adhesion. A so-called fixed position preload is applied to the pair of bearing members (ball bearings 8 and 9) to improve the bearing rotation accuracy.
【００１２】具体的には、図１に示すように、玉軸受９
にあっては、外輪部１９がハブ３の円筒部３８の内周面
６に、また内輪部１８がシャフト４の外周面４１のそれ
ぞれの対応した部位に設けられている。また玉軸受８に
あっては、外輪部１７がハブ３の円筒部３８の内周面７
に、また内輪部１６がシャフト４の外周面４１のそれぞ
れの対応した部位に設けられている。そして、それぞれ
の外輪部１９および１７を予め円筒部３８の内周面６及
び７に対し、所定の位置決め（この場合、円筒部３８の
段部１０が軸線方向に位置規制する）を行なって圧入ま
たは接着剤等により固定させておく。次に、シャフト４
の外周面４１に接着剤を塗布しておき、押圧部材２５を
玉軸受９の内輪部１８の側面に当接させ、図１の下方向
（実質上、軸線方向）に所定の押圧力（予圧力）Ｆを付
加させる。Specifically, as shown in FIG. 1, the ball bearing 9
In this case, the outer ring portion 19 is provided on the inner peripheral surface 6 of the cylindrical portion 38 of the hub 3, and the inner ring portion 18 is provided on the corresponding portion of the outer peripheral surface 41 of the shaft 4. Further, in the ball bearing 8, the outer ring portion 17 has the inner peripheral surface 7 of the cylindrical portion 38 of the hub 3.
Further, the inner ring portions 16 are provided at the corresponding portions of the outer peripheral surface 41 of the shaft 4. Then, the outer ring portions 19 and 17 are press-fitted to the inner peripheral surfaces 6 and 7 of the cylindrical portion 38 in advance by predetermined positioning (in this case, the step portion 10 of the cylindrical portion 38 regulates the position in the axial direction). Alternatively, it is fixed with an adhesive or the like. Next, shaft 4
An adhesive has been applied to the outer peripheral surface 41 of the ball bearing 9, the pressing member 25 is brought into contact with the side surface of the inner ring portion 18 of the ball bearing 9, and a predetermined pressing force (previously, axial direction) is applied to the side surface of the inner ring portion 18 of the ball bearing 9. Pressure) F is applied.
【００１３】押圧力Ｆは、玉軸受９の内輪部１８を図１
の下方向に作用し、玉２１を経て外輪部１９に作用す
る。外輪部１９の図における下側の側面が、円筒部３８
の段部１０に当接しているので、その反作用により、外
輪部１９は、実質上、軸線方向の上方向にＦの押圧力を
得る。すなわち、図１における圧力線２３に従い作用す
る。さらにこの押圧力Ｆは、円筒部３８を通じて玉軸受
８の外輪部１７に作用し、玉２０を経て内輪部１６に到
達する。内輪部１６は、図における下側の側面がシャフ
ト４に設けられた段部２４に当接している。こうして、
内輪部１６も同様にして、押圧力Ｆの反作用により、実
質上、軸線方向の図における上方向にＦの押圧力を得
る。そして、図１に示す圧力線２２が作用線となる。The pressing force F is applied to the inner ring portion 18 of the ball bearing 9 as shown in FIG.
And acts on the outer ring portion 19 via the balls 21. The lower side surface of the outer ring portion 19 in the drawing is a cylindrical portion 38.
Since it is in contact with the stepped portion 10, the outer ring portion 19 obtains a pressing force of F substantially in the axially upward direction due to the reaction thereof. That is, it operates according to the pressure line 23 in FIG. Further, the pressing force F acts on the outer ring portion 17 of the ball bearing 8 through the cylindrical portion 38 and reaches the inner ring portion 16 via the balls 20. The inner ring portion 16 is in contact with the step portion 24 provided on the shaft 4 on the lower side surface in the drawing. Thus
Similarly, the inner ring portion 16 also obtains the pressing force of F in the upward direction in the axial direction by the reaction of the pressing force F. The pressure line 22 shown in FIG. 1 becomes the action line.
【００１４】次に、押圧部材２５を図の下方向（実質上
軸線方向の下方向）へ押圧力Ｆにて予圧力を付加した状
態でスピンドルモータ１を回転駆動させる。この回転さ
せた状態で内輪部１８と内輪部１６とを対応しているシ
ャフト外周面４１へ固着させる。すなわち、スピンドル
モータ１のハブ３、ひいては円筒部３８を回転駆動させ
ることにより、それぞれの内輪部１８及び１６における
内周面と、これに対応したシャフト４の外周面４１と
が、均等に面接して接着固定される。従って、押圧部材
２５が、玉軸受９の内輪部１８の側面（図では上側）を
押圧する際、仮にこの側面を全周にわたって均等に押圧
力が作用（付加）されずとも、玉軸受９及び８により実
質的にシャフト４と円筒部３８とが調芯される。こうし
て、それぞれの玉軸受９及び８の内輪内周面とシャフト
４の外周面４１とは、均等な面接触による接着固定が行
なわれる。Next, the spindle motor 1 is rotationally driven in a state in which the pressing member 25 is applied with a pressing force F in the downward direction of the drawing (substantially downward in the axial direction). In this rotated state, the inner ring portion 18 and the inner ring portion 16 are fixed to the corresponding shaft outer peripheral surfaces 41. That is, by rotating the hub 3 of the spindle motor 1 and, by extension, the cylindrical portion 38, the inner peripheral surfaces of the inner ring portions 18 and 16 and the outer peripheral surface 41 of the shaft 4 corresponding thereto are evenly contacted. It is fixed by adhesion. Therefore, when the pressing member 25 presses the side surface (upper side in the drawing) of the inner ring portion 18 of the ball bearing 9, even if the pressing force is not uniformly applied (applied) to the side surface over the entire circumference, the ball bearing 9 and 8, the shaft 4 and the cylindrical portion 38 are substantially aligned. In this way, the inner peripheral surface of the inner ring of each of the ball bearings 9 and 8 and the outer peripheral surface 41 of the shaft 4 are bonded and fixed by even surface contact.
【００１５】介在される玉軸受９及び８とは、静止部材
であるシャフト４と回転部材である円筒部３８に対し
て、歪みが無く、無理な力が作用しない（従って、適正
な圧力線２３及び２２を生成する）予圧が付加できるた
め、高精度な軸受支持が可能となる。The intervening ball bearings 9 and 8 have no distortion and no unreasonable force with respect to the shaft 4 which is a stationary member and the cylindrical portion 38 which is a rotating member (therefore, an appropriate pressure line 23). Since a preload can be applied (which produces the pressures of 22 and 22), it is possible to support the bearing with high accuracy.
【００１６】次に、図３及び図４を用いて、実際にスピ
ンドルモータの組立順序に伴い、本発明に従う定位置予
圧付加方法について説明する。図３及び図４は、既に用
いた図１及び図２のスピンドルモータ１と同じ構成であ
り、同じ部材には同様の番号が付されている。まず図３
の（ａ）では、予め、ハブ３のハブ内周面１３に接着剤
を塗布してロータヨーク１４を固定させ、更にその上に
接着剤を介してロータマグネット１５を固定させてお
く。次に円筒部３８の上側の内周面６及び下側の内周面
７に接着剤ｘを塗布する。Next, with reference to FIGS. 3 and 4, a method for applying a constant position preload according to the present invention will be described according to the actual assembly sequence of the spindle motor. 3 and 4 have the same configuration as the spindle motor 1 of FIGS. 1 and 2 which has already been used, and the same members are denoted by the same reference numerals. First, Fig. 3
In (a), an adhesive is applied in advance to the hub inner peripheral surface 13 of the hub 3 to fix the rotor yoke 14, and the rotor magnet 15 is further fixed thereto with the adhesive. Next, the adhesive x is applied to the upper inner peripheral surface 6 and the lower inner peripheral surface 7 of the cylindrical portion 38.
【００１７】図３の（ｂ）では、ハブ３に対して、玉軸
受９を図の上から下方向へ嵌め込んで、その外輪部１９
をハブ内周面６に接着固定する。また、玉軸受８は、図
の下から上方向へ嵌め込んで、その外輪部１７をハブ内
周面７に接着固定する。この状態をハブアッセンブリと
する。なお、両玉軸受共に、ハブ３の円筒部３８に設け
られた段部１０によって、それぞれの軸線方向の位置決
めがなされる。また、これらの玉軸受の、ハブ３への固
定方法は、接着に限らず、圧入による固定でも好適であ
る。In FIG. 3B, the ball bearing 9 is fitted into the hub 3 from the top to the bottom of the drawing, and the outer ring portion 19 thereof is fitted.
Are bonded and fixed to the inner peripheral surface 6 of the hub. Further, the ball bearing 8 is fitted from the bottom to the top in the drawing, and its outer ring portion 17 is adhesively fixed to the hub inner peripheral surface 7. This state is called a hub assembly. Both ball bearings are positioned in the axial direction by the step portion 10 provided on the cylindrical portion 38 of the hub 3. Further, the fixing method of these ball bearings to the hub 3 is not limited to adhesion, and fixing by press fitting is also suitable.
【００１８】図３の（ｃ）では、予め、ブラケット２の
円筒部１１にステータ１２を固定させておき、シャフト
４の外周面４１に接着剤ｘを塗布する。そして、図３
（ｂ）の工程でのハブアッセンブリを、このブラケット
２のシャフト４へ挿入させる。この状態を図３の（ｄ）
に示す。この状態では、まだ玉軸受９及び８の内輪部１
８と１６とは、シャフト４の外周面４１に接着固定され
ておらず、また予圧も付加されていない。In FIG. 3C, the stator 12 is fixed to the cylindrical portion 11 of the bracket 2 in advance, and the adhesive x is applied to the outer peripheral surface 41 of the shaft 4. And FIG.
The hub assembly in the step (b) is inserted into the shaft 4 of the bracket 2. This state is shown in FIG.
Shown in. In this state, the inner ring portion 1 of the ball bearings 9 and 8 is still
8 and 16 are not adhered and fixed to the outer peripheral surface 41 of the shaft 4 and no preload is applied.
【００１９】次に、図４の（ａ）において、玉軸受９の
内輪部１８の上側の側面に押圧部材２７を、図の上から
下方向に当接させる。押圧部材２７の先端に設けられた
押圧部２８は、当接面が環状に形成されると共に、その
当接面が内輪部１８の側面の形状とほぼ同等かまたは少
し小さめに設定されている。そして、所定の押圧力（荷
重）を付加する。この押圧力が予圧力となる。なお、押
圧部材２７は、例えばエアシリンダー等により、軸線方
向に昇降するように設けてある。Next, in FIG. 4A, the pressing member 27 is brought into contact with the upper side surface of the inner ring portion 18 of the ball bearing 9 from the top to the bottom of the drawing. The pressing portion 28 provided at the tip of the pressing member 27 has a contact surface formed in an annular shape, and the contact surface is set to be substantially the same as or slightly smaller than the shape of the side surface of the inner ring portion 18. Then, a predetermined pressing force (load) is applied. This pressing force becomes the preload. The pressing member 27 is provided, for example, by an air cylinder so as to move up and down in the axial direction.
【００２０】図４の（ｂ）では、最後の工程として、こ
の予圧力を付加しつつ、ステータ１２のコイル導出部２
６に所定の電源を供給し、ハブ３を回転駆動させる。そ
してシャフト４の外周面４１に、内輪部１８及び１６が
固着される迄の所定の時間、ハブ３を回転させる。そし
て、固着完了後、ハブ３の回転を停止させる。これによ
り定位置予圧が終わる。In FIG. 4B, as the final step, the coil lead-out portion 2 of the stator 12 is applied while applying this preload.
A predetermined power source is supplied to 6 to drive the hub 3 to rotate. Then, the hub 3 is rotated for a predetermined time until the inner ring portions 18 and 16 are fixed to the outer peripheral surface 41 of the shaft 4. Then, after the fixing is completed, the rotation of the hub 3 is stopped. This ends the fixed position preload.
【００２１】次に別のスピンドルモータを用いて、その
定位置予圧の付加方法について説明する。図５は、他の
スピンドルモータを示す断面図である。図１で示したス
ピンドルモータと同様に、記録ディスクを回転駆動する
ための回転部材としてのハブを有している。そして、同
様の部材には同じ番号が付してある。部材の説明は図１
と重複するため省略するが、構成の違いとしては、図１
に示したスピンドルモータに対して図５に示すスピンド
ルモータでは、シャフト４がハブ３と一体的に設けられ
ていることである。すなわち、静止部材としてのブラケ
ット２に対し、シャフト４が相対回転する、いわゆる軸
回転型スピンドルモータを示している。シャフト４を回
転支持する玉軸受９及び８への定位置予圧を付加させる
方法として以下に説明する。Next, a method of adding the fixed position preload by using another spindle motor will be described. FIG. 5 is a sectional view showing another spindle motor. Similar to the spindle motor shown in FIG. 1, it has a hub as a rotating member for rotating the recording disk. The same members are given the same numbers. Explanation of the members is shown in Fig. 1.
Although it is omitted because it overlaps with,
In the spindle motor shown in FIG. 5, in contrast to the spindle motor shown in FIG. 5, the shaft 4 is integrally provided with the hub 3. That is, a so-called axial rotation type spindle motor in which the shaft 4 rotates relative to the bracket 2 as a stationary member is shown. A method for applying a fixed position preload to the ball bearings 9 and 8 that rotatably support the shaft 4 will be described below.
【００２２】シャフト４の外周面４１とブラケット２の
内周面３１とのそれぞれに、予め接着剤を塗布してお
く。玉軸受９を内周面３１に嵌め込み、外輪部１９と内
周面３１とを固着する。その際、玉軸受９の上側側面
は、ブラケット２の円筒部４６のストッパー部３２に奥
当たりさせて固定させる。そして、シャフト４を玉軸受
１９の内輪部１８に挿入して固着を行なう。この時、玉
軸受１９の上側側面は、シャフト４の根元段部４５に奥
当たりさせて固定させる。次に、スペーサ３０をシャフ
ト４の外周面４１に挿通し、玉軸受１９の下側側面に当
接させて、スペーサ３０を固定させる。An adhesive is applied in advance to each of the outer peripheral surface 41 of the shaft 4 and the inner peripheral surface 31 of the bracket 2. The ball bearing 9 is fitted into the inner peripheral surface 31, and the outer ring portion 19 and the inner peripheral surface 31 are fixed to each other. At that time, the upper side surface of the ball bearing 9 is fixed to the stopper portion 32 of the cylindrical portion 46 of the bracket 2 by making a deep contact. Then, the shaft 4 is inserted into the inner ring portion 18 of the ball bearing 19 and fixed. At this time, the upper side surface of the ball bearing 19 is fixed to the root step portion 45 of the shaft 4 by abutting it. Next, the spacer 30 is inserted through the outer peripheral surface 41 of the shaft 4 and brought into contact with the lower side surface of the ball bearing 19 to fix the spacer 30.
【００２３】玉軸受８を、図の下側からシャフト４へ挿
入させると、ブラケット２の内周面３１に外輪部１７が
嵌め込まれる。この状態で、玉軸受９と玉軸受８とは、
シャフト４の根元段部４５とスペーサ３０とにより、軸
線上の定位置に位置決めされる。また、玉軸受９の外輪
部１９は、ストッパー部３２により、軸線方向上方向に
位置規制される。次に押圧部材２７を玉軸受８の外輪部
１７の下側の側面に当接させ、図５における上方向、す
なわち実質上、軸線方向の上方向へ所定の予圧力を付加
させる。そしてステータ１２のコイル線４７に所定の電
源を供給して、ハブ３（シャフト４）を回転させる。接
着剤が円筒部内周面３１と外輪部１９及び１７とを固着
させる所定の時間が経過した後、ハブ３の回転を停止さ
せて、定位置予圧の付加が終了する。この場合、予圧に
よる玉軸受９及び８における圧力線２３及び２２は図に
示す如く作用する。When the ball bearing 8 is inserted into the shaft 4 from the lower side of the drawing, the outer ring portion 17 is fitted into the inner peripheral surface 31 of the bracket 2. In this state, the ball bearing 9 and the ball bearing 8 are
The root step portion 45 of the shaft 4 and the spacer 30 are positioned at a fixed position on the axis. The outer ring portion 19 of the ball bearing 9 is axially upwardly regulated by the stopper portion 32. Next, the pressing member 27 is brought into contact with the lower side surface of the outer ring portion 17 of the ball bearing 8 to apply a predetermined preload in the upward direction in FIG. 5, that is, substantially in the axial upward direction. Then, a predetermined power is supplied to the coil wire 47 of the stator 12 to rotate the hub 3 (shaft 4). After a lapse of a predetermined time for the adhesive to fix the inner peripheral surface 31 of the cylindrical portion and the outer ring portions 19 and 17, the rotation of the hub 3 is stopped, and the application of the fixed position preload is completed. In this case, the pressure lines 23 and 22 in the ball bearings 9 and 8 due to the preload act as shown in the figure.
【００２４】以上、本発明に従う定位置予圧付加方法の
実施例について述べたが、本発明はかかる実施例に限定
されるものでなく、本発明の範囲を逸脱することなく種
々の変形及び修正が可能である。例えば、本実施例で
は、予圧を作用させて、軸受部材の内輪部または外輪部
を、モータ自らの回転駆動を利用して回転させている
が、外部からの回転力を伝導させて用いても構わない。
また、その伝導に伴う手段は特に限定されるものではな
い。Although the embodiment of the method for applying a constant position preload according to the present invention has been described above, the present invention is not limited to such an embodiment, and various changes and modifications can be made without departing from the scope of the present invention. It is possible. For example, in the present embodiment, preload is applied to rotate the inner ring portion or the outer ring portion of the bearing member by utilizing the rotational drive of the motor itself, but the rotational force from the outside can be transmitted and used. I do not care.
Further, the means associated with the conduction is not particularly limited.
【００２５】[0025]
【発明の効果】本発明の定位置予圧付加方法によれば、
回転部材を回転させながら、静止部に対応した軸受部材
の内輪部または外輪部を押圧して予圧を付加するように
したため、予圧のための押圧部材の形状や押圧の状態等
の種々のバラツキに対しても、確実に且つ均質な予圧が
付加でき、従って、回転精度が高く回転軸芯にブレのな
い、振動や騒音の発生を効果的抑えた定位置予圧付加方
法となる。According to the constant position preload applying method of the present invention,
Since the preload is applied by pressing the inner ring part or the outer ring part of the bearing member corresponding to the stationary part while rotating the rotating member, various variations such as the shape of the pressing member for preloading and the pressing state can be achieved. On the other hand, it is possible to surely and uniformly apply a preload, and therefore, a fixed position preload application method that has a high rotational accuracy and is free from vibration of the rotary shaft core and that effectively suppresses the generation of vibration and noise.
【図１】本発明に従う定位置予圧付加方法を説明するた
めの一例としてあげたスピンドルモータの断面図。FIG. 1 is a cross-sectional view of a spindle motor taken as an example for explaining a fixed position preload applying method according to the present invention.
【図２】図１に示すスピンドルモータの要部拡大断面
図。FIG. 2 is an enlarged sectional view of a main part of the spindle motor shown in FIG.
【図３】本発明に従う定位置予圧付加方法の手順を説明
する為のスピンドルモータの断面図で、図３（ａ）乃至
図３（ｄ）を示す。3 (a) to 3 (d) are sectional views of a spindle motor for explaining the procedure of the method for applying a constant position preload according to the present invention.
【図４】本発明に従う定位置予圧付加方法の手順を説明
する為のスピンドルモータの断面図で、図４（ａ）及び
（ｂ）を示す。4 (a) and 4 (b) are sectional views of a spindle motor for explaining the procedure of the method for applying a constant position preload according to the present invention.
【図５】本発明に従う定位置予圧付加方法の手順を説明
する為の別のスピンドルモータの断面図。FIG. 5 is a sectional view of another spindle motor for explaining the procedure of the fixed position preload applying method according to the present invention.
１ スピンドルモータ ２ ブラケット（静止部材） ３ ハブ（回転部材） ４ シャフト ８ 玉軸受 ９ 玉軸受 ２７ 押圧部材 1 Spindle Motor 2 Bracket (Stationary Member) 3 Hub (Rotating Member) 4 Shaft 8 Ball Bearing 9 Ball Bearing 27 Pressing Member
Claims (1)
的に相対回転する回転部材と、の間に介在された一対の
軸受部材を、軸線方向に予め定位置に位置決めされて予
圧が付加される定位置予圧付加方法において、 前記軸受部材は、前記回転部材を回転させながら、前記
静止部材に対応した前記軸受部材の内輪部または外輪部
へ予圧が付加された、ことを特徴とする定位置予圧付加
方法。1. A pair of bearing members interposed between a stationary member and a rotating member that rotates relative to the stationary member coaxially relative to the stationary member are preliminarily positioned at predetermined positions in the axial direction to apply a preload. In the fixed position preload applying method, the bearing member is preloaded to the inner ring portion or the outer ring portion of the bearing member corresponding to the stationary member while rotating the rotating member. Position preloading method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3313236A JP3050977B2 (en) | 1991-10-31 | 1991-10-31 | How to apply fixed position preload |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3313236A JP3050977B2 (en) | 1991-10-31 | 1991-10-31 | How to apply fixed position preload |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05126144A true JPH05126144A (en) | 1993-05-21 |
| JP3050977B2 JP3050977B2 (en) | 2000-06-12 |
Family
ID=18038754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3313236A Expired - Fee Related JP3050977B2 (en) | 1991-10-31 | 1991-10-31 | How to apply fixed position preload |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3050977B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009185859A (en) * | 2008-02-05 | 2009-08-20 | Sii Micro Precision Kk | Roller bearing unit and its manufacturing method |
-
1991
- 1991-10-31 JP JP3313236A patent/JP3050977B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009185859A (en) * | 2008-02-05 | 2009-08-20 | Sii Micro Precision Kk | Roller bearing unit and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3050977B2 (en) | 2000-06-12 |
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