JPH05308745A - Spindle motor - Google Patents
Spindle motorInfo
- Publication number
- JPH05308745A JPH05308745A JP4135960A JP13596092A JPH05308745A JP H05308745 A JPH05308745 A JP H05308745A JP 4135960 A JP4135960 A JP 4135960A JP 13596092 A JP13596092 A JP 13596092A JP H05308745 A JPH05308745 A JP H05308745A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- inner ring
- ball bearing
- shaft member
- spindle 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.)
- Granted
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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Mounting Of Bearings Or Others (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、軸受部材を予め定位置
に位置決めして予圧を付加するスピンドルモータに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor which preliminarily positions a bearing member at a fixed position and applies a preload thereto.
【0002】[0002]
【従来の技術】従来、光・磁気ディスク等の記録媒体を
回転駆動するためのスピンドルモータ等においては、記
録媒体に関する読み/書きエラー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、一対のラジ
アル型の玉軸受を軸部材に沿って直列に配置させてい
る。そして、この一対の玉軸受の軸間隔を一定として、
各々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、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 recording medium such as an optical / magnetic disk, vibration or noise that causes a read / write error on the recording medium is suppressed as much as possible. Therefore, a pair of radial type ball bearings are arranged in series along the shaft member. And, with the axial spacing of this pair of ball bearings constant,
A fixed position preloading method is employed in which the inner and outer races are fixed by applying a predetermined load to the inner and outer races, which are opposed to each other in the axial direction.
【0003】図3は定位置予圧方式の軸受を備えた従来
のスピンドルモータである。FIG. 3 shows a conventional spindle motor having a fixed position preload type bearing.
【0004】このスピンドルモータはハブと軸部材が一
体に形成された軸回転型のスピンドルモータである。This spindle motor is a shaft rotation type spindle motor in which a hub and a shaft member are integrally formed.
【0005】一対の玉軸受105、106のうち、上側
の玉軸受106の外輪106aを対応する静止部材10
2に、内輪106bを軸部材104に、接着あるいは圧
入により固着する。次に下側の玉軸受105の外輪10
5aの外周面と静止部材102を速効性の接着剤で、内
輪105bの内周面と軸部材104を遅効性の接着剤で
接着し、内輪105bに円筒状の押圧部材108を用い
て荷重を加圧する。すると下側の玉軸受105の内輪1
05bは押圧部材108のより上方向に押し上げられ、
上側の玉軸受106の内輪106bは軸部材104の根
元に設けられた突起104aにより下側に押し下げら
れ、双方の軸受105、106に予圧が付加された状態
で静止部材102と軸部材104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。Of the pair of ball bearings 105 and 106, the stationary member 10 corresponding to the outer ring 106a of the upper ball bearing 106.
2, the inner ring 106b is fixed to the shaft member 104 by adhesion or press fitting. Next, the outer ring 10 of the lower ball bearing 105
The outer peripheral surface of 5a and the stationary member 102 are bonded with a fast-acting adhesive, the inner peripheral surface of the inner ring 105b and the shaft member 104 are bonded with a slow-acting adhesive, and a load is applied to the inner ring 105b by using a cylindrical pressing member 108. Pressurize. Then, the inner ring 1 of the lower ball bearing 105
05b is pushed upward from the pressing member 108,
The inner ring 106b of the upper ball bearing 106 is pushed downward by a protrusion 104a provided at the base of the shaft member 104, and is fixed to the stationary member 102 and the shaft member 104 with a preload applied to both bearings 105 and 106. To be done. As a result, the rotational accuracy of the radial type ball bearing is increased, and vibration and noise are suppressed.
【0006】[0006]
【発明が解決しようとする課題】しかしながら、この種
の荷重を付加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、内輪側面に均等に予圧が付加
されない状態で軸受が対応する部材に固着されてしま
い、実質的に十分な回転精度が得られなかった。However, the pressing member used for applying this type of load is not necessarily pressed in the axial direction, and the bearing corresponds to a member in which the preload is not evenly applied to the side surface of the inner ring. It was fixed on the sheet, and substantially sufficient rotation accuracy could not be obtained.
【0007】特に、軸部材が軸線方向外側に位置する軸
受の端面よりも外側に突出している場合は、押圧部材を
軸部材に沿わして押圧すれば、押圧部材の押圧部は軸受
の内輪部に確実に接触させることができるが、軸線方向
外側に位置する軸受の端面と軸部材の端面が同一面に位
置する場合は、押圧部材が軸受の内輪部に当接すると同
時に軸部材の端面にも当接し、軸受の内輪に予圧を付加
できなくなる障害があった。In particular, when the shaft member projects outward from the end surface of the bearing located outside in the axial direction, the pressing member of the pressing member is pressed along the shaft member so that the pressing portion of the pressing member has an inner ring portion of the bearing. However, if the end face of the bearing and the end face of the shaft member located on the outside in the axial direction are on the same plane, the pressing member contacts the inner ring portion of the bearing and at the same time the end face of the shaft member is contacted. However, there was a problem that preload could not be applied to the inner ring of the bearing.
【0008】また、軸受の内輪と、内輪に対応する部材
との間に遅効性の接着剤を用い、接着剤が硬化する前に
荷重を加圧していたが、現実には荷重を加圧する前に硬
化が始まり所定の荷重を加圧しているにも係わらず軸受
には十分な予圧が付加できないことがあった。Further, a slow-acting adhesive was used between the inner ring of the bearing and the member corresponding to the inner ring, and the load was applied before the adhesive was hardened. However, in reality, before applying the load. In some cases, sufficient preload could not be applied to the bearing even though hardening started and a predetermined load was applied.
【0009】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荷重を付加する
際、遅効性の接着剤が硬化する前に荷重を加圧でき、軸
受の端面と軸部材の端面が同一面に位置する場合でも、
容易に、確実に軸受の内輪に予圧を付加できる構造を備
えたスピンドルモータを提供することである。The present invention has been made in view of the above facts, and the main purpose thereof is to apply a load for the fixed position preload before the slow-acting adhesive is hardened so that the load can be applied. Even if the end face of and the end face of the shaft member are located in the same plane,
(EN) Provided is a spindle motor having a structure capable of easily and surely applying a preload to an inner ring of a bearing.
【0010】[0010]
【課題を解決するための手段】上記目標を達成するため
に、本発明のスピンドルモータでは、一対の軸受部材の
うち少なくとも一方の軸受部材と静止部材及び/または
回転部材との間に弾発部材を内装して、軸受部材の内輪
部または外輪部に予圧を付加して軸受部材を静止部材及
び/または回転部材に固着した。In order to achieve the above-mentioned object, in a spindle motor of the present invention, an elastic member is provided between at least one of a pair of bearing members and a stationary member and / or a rotating member. The bearing member is fixed to the stationary member and / or the rotating member by applying a preload to the inner ring portion or the outer ring portion of the bearing member.
【0011】[0011]
【作用】上述のスピンドルモータによれば、軸受部材と
静止部材及び/または回転部材との間に弾発部材を内装
しているために、軸受部材を軸部材に挿入した段階で予
圧を付加することができ、軸線方向外側に位置する軸受
の内輪の端面と軸部材の端面を同一面にして支持すれ
ば、上記の弾発部材により、軸線方向内側の軸受の内輪
が均等に押圧され、確実に予圧を付加することができ
る。According to the above spindle motor, since the elastic member is internally provided between the bearing member and the stationary member and / or the rotating member, a preload is applied when the bearing member is inserted into the shaft member. If the end surface of the inner ring of the bearing positioned on the outer side in the axial direction and the end surface of the shaft member are supported in the same plane, the elastic member can evenly press the inner ring of the bearing on the inner side in the axial direction, and A preload can be applied to.
【0012】[0012]
【実施例】図1は、本発明に従うスピンドルモータの断
面図である。1は回転部材としてのハブ、2は静止部材
としての軸受保持部材である。5、6はハブ1と軸受保
持部材2との間に介在して、ハブ1を軸受保持部材2に
対して相対的に回転自在に支持する第1の玉軸受、及び
第2の玉軸受である。1 is a sectional view of a spindle motor according to the present invention. Reference numeral 1 is a hub as a rotating member, and 2 is a bearing holding member as a stationary member. Reference numerals 5 and 6 denote a first ball bearing and a second ball bearing which are interposed between the hub 1 and the bearing holding member 2 to rotatably support the hub 1 relative to the bearing holding member 2. is there.
【0013】ハブ1は、ステンレス鋼から形成された略
カップ形状を成しており、側面に磁気ディスク90が装
着される円筒部1aと、円筒部1aの一端面(図1にお
ける上端部)に位置し、カップ形状の底面部にあたるク
ランプ保持部1bと、他端部(図1における下端部)で
円筒部1aの外径よりも径方向に拡張した鍔形状を成す
ディスク搭載部1cとからなる。The hub 1 is formed of stainless steel and has a substantially cup shape. The hub 1 has a cylindrical portion 1a on which a magnetic disk 90 is mounted, and one end surface (upper end portion in FIG. 1) of the cylindrical portion 1a. The clamp holding portion 1b, which is positioned and corresponds to the bottom portion of the cup shape, and the disc mounting portion 1c, which has a flange shape and is expanded at the other end (the lower end portion in FIG. 1) in the radial direction from the outer diameter of the cylindrical portion 1a. ..
【0014】記録部材としての磁気ディスク90は、デ
ィスク搭載部1cに載置され、リング状のスペーサ91
を介して複数枚の磁気ディスク90が積層される。積層
された磁気ディスク90はクランプ部材92により上方
から押圧固定される。A magnetic disk 90 as a recording member is mounted on the disk mounting portion 1c and has a ring-shaped spacer 91.
A plurality of magnetic disks 90 are stacked via the. The stacked magnetic disks 90 are pressed and fixed from above by a clamp member 92.
【0015】円筒部1aの内周部には円筒状のロータマ
グネット35が配設されている。A cylindrical rotor magnet 35 is arranged on the inner peripheral portion of the cylindrical portion 1a.
【0016】一方、クランプ保持部1bの中心部にはハ
ブ1と一体に形成された軸部材4がハブ1の開放端側に
向かって軸線方向に突設されている。On the other hand, a shaft member 4 formed integrally with the hub 1 is provided at the center of the clamp holding portion 1b so as to project in the axial direction toward the open end side of the hub 1.
【0017】軸受保持部材2は円筒形の基部20と、そ
の基部20の内周側の中央部に、全周に亙って突出した
内方張出部21と、基部20の一端部においてわずかに
外方向に突出したステータ固定部22とからなる。The bearing holding member 2 has a cylindrical base portion 20, an inward projecting portion 21 projecting over the entire circumference in the center portion on the inner peripheral side of the base portion 20, and a small amount at one end portion of the base portion 20. And a stator fixing portion 22 protruding outward.
【0018】ステータ固定部22とハブ1のクランプ保
持部1bとの間は、両部材が近接して配置され、狭い空
間部11となっている。この空間部11は、モータ内部
と外部との通気を著しく困難とし、第2の玉軸受から発
生する潤滑剤等のアウトガスがディスク室に飛散する事
を防ぐラビリンス構造を構成している。Both members are arranged close to each other between the stator fixing portion 22 and the clamp holding portion 1b of the hub 1 to form a narrow space portion 11. The space 11 has a labyrinth structure that makes it extremely difficult to ventilate the inside and the outside of the motor and prevents outgas such as lubricant generated from the second ball bearing from scattering into the disk chamber.
【0019】ステータ3は軸受保持部材2のステータ固
定部22と反対の端部から挿嵌され、ステータ固定部2
2に当接する位置にて接着固定されている。ステータ3
はステータコア31と、ステータコア31に捲回された
ステータコイル32からなり、ロータマグネット35に
対向して配設されている。そして、ステータコイル32
に通電が開始されると、ステータ3とロータマグネット
35の電磁気的相互作用によりハブ1と、ハブ1に一体
形成された軸部材4が静止部材である軸受保持部材2に
対して相対的に回転する。The stator 3 is inserted from the end of the bearing holding member 2 opposite to the stator fixing portion 22, and the stator fixing portion 2 is inserted.
It is adhesively fixed at a position where it abuts 2. Stator 3
Is composed of a stator core 31 and a stator coil 32 wound around the stator core 31, and is arranged so as to face the rotor magnet 35. And the stator coil 32
When the energization is started, the hub 1 and the shaft member 4 formed integrally with the hub 1 rotate relative to the bearing holding member 2 which is a stationary member due to electromagnetic interaction between the stator 3 and the rotor magnet 35. To do.
【0020】内方張出部21はステータ3よりもハブ1
の開放端部寄りに設けられ、軸部材4の中央部に位置し
ている。The inward projecting portion 21 has the hub 1 rather than the stator 3.
Is provided near the open end of the shaft member 4 and is located at the center of the shaft member 4.
【0021】内方張出部21の下面21bよりも下部に
位置する基部20の内側面が下部外輪固定面20bであ
り、上面21aよりも上部に位置する基部20の内側面
が上部外輪固定面20aである。The inner surface of the base portion 20 located below the lower surface 21b of the inward projection 21 is the lower outer ring fixing surface 20b, and the inner surface of the base portion 20 located above the upper surface 21a is the upper outer ring fixing surface. 20a.
【0022】第1の玉軸受5の外輪51は、その上端面
51aが内方張出部21の下面21bに当接した状態で
下部外輪固定面20bに接着され、第2の玉軸受6の外
輪61は、その下端面61bが内方張出部21の上面2
1aに当接した状態で上部外輪固定面20aに接着され
ている。The outer ring 51 of the first ball bearing 5 is adhered to the lower outer ring fixing surface 20b in a state where the upper end surface 51a of the outer ring 51 is in contact with the lower surface 21b of the inward projecting portion 21, and the outer ring 51 of the second ball bearing 6 is The lower end surface 61 b of the outer ring 61 is the upper surface 2 of the inward protruding portion 21.
The upper outer ring fixing surface 20a is adhered to the upper outer ring fixing surface 20a while being in contact with the first outer ring 1a.
【0023】第1の玉軸受5の内輪52は軸部材4の下
部内輪固定面4bに比較的硬化の速い接着剤用いて固定
され、第2の玉軸受6の内輪62は軸部材4の上部内輪
固定面4aに比較的硬化の遅い接着剤用いて固定されて
いる。The inner ring 52 of the first ball bearing 5 is fixed to the lower inner ring fixing surface 4b of the shaft member 4 by using a relatively quick-curing adhesive, and the inner ring 62 of the second ball bearing 6 is the upper part of the shaft member 4. It is fixed to the inner ring fixing surface 4a using an adhesive agent that cures relatively slowly.
【0024】第2の玉軸受6の内輪上端面62aとハブ
1のクランプ保持部1cとの間には、弾性部材7が装着
されている。An elastic member 7 is mounted between the inner ring upper end surface 62a of the second ball bearing 6 and the clamp holding portion 1c of the hub 1.
【0025】弾発部材7は2枚の皿バネ71、72を内
径部において弾性を有するように外周部を固着してい
る。弾発部材7の上部皿バネ71はハブ1のクランプ保
持部1cと軸部材4との根端部に当接し、下部皿バネ7
2は第2の玉軸受6の内輪上端面62aに当接して第2
の玉軸受6の内輪62を軸線方向下方向に押圧を加え
る。The elastic member 7 has two disc springs 71 and 72 fixed to the outer periphery so as to have elasticity in the inner diameter. The upper disc spring 71 of the elastic member 7 abuts on the root ends of the clamp holding portion 1c of the hub 1 and the shaft member 4, and the lower disc spring 7
2 contacts the upper end surface 62a of the inner ring of the second ball bearing 6
The inner ring 62 of the ball bearing 6 is pressed downward in the axial direction.
【0026】その際、第1の玉軸受5の内輪下端面52
bと、軸部材4の端面42とを押圧部材8によって固定
すれば、弾発部材7の弾性力により双方の玉軸受5、6
に予圧を付加した状態で定位置に固着できる。At this time, the inner ring lower end surface 52 of the first ball bearing 5
If b and the end face 42 of the shaft member 4 are fixed by the pressing member 8, the elastic force of the elastic member 7 causes both ball bearings 5, 6
It can be fixed in place with a preload applied to.
【0027】次に、上記スピンドルモータの変形として
の実施例を説明する。Next, an embodiment as a modification of the spindle motor will be described.
【0028】図1におけるスピンドルモータでは、ハブ
1と軸部材4が一体形成されていたが、この例はハブ1
と軸部材4が別体で形成されたスピンドルモータであ
る。In the spindle motor shown in FIG. 1, the hub 1 and the shaft member 4 are integrally formed, but in this example, the hub 1
And the shaft member 4 is a separate spindle motor.
【0029】スピンドルモータの名称及び番号について
は図1のものを引用する。The names and numbers of the spindle motors are as shown in FIG.
【0030】第1の玉軸受5の外輪51と、第2の玉軸
受6の外輪61と、を軸受保持部材2の内周に接着し、
第2の玉軸受6側から軸部材4を挿入する。第1の玉軸
受5の内輪52とは圧入あるいは速効性の接着剤により
接着し、第2の玉軸受6の内輪62とは硬化の遅い接着
剤により接着する。The outer ring 51 of the first ball bearing 5 and the outer ring 61 of the second ball bearing 6 are bonded to the inner circumference of the bearing holding member 2,
The shaft member 4 is inserted from the second ball bearing 6 side. The inner ring 52 of the first ball bearing 5 is bonded with a press-fitting or quick-acting adhesive, and the inner ring 62 of the second ball bearing 6 is bonded with a slow-curing adhesive.
【0031】そして、軸部材4の端面42と第1の玉軸
受5の内輪下端面52bに押圧部材8を当設させた後、
弾性部材7を第2の玉軸受6の内輪上端面62aに装設
する。After the pressing member 8 is abutted on the end surface 42 of the shaft member 4 and the inner ring lower end surface 52b of the first ball bearing 5,
The elastic member 7 is mounted on the inner ring upper end surface 62a of the second ball bearing 6.
【0032】最後にハブ1を軸部材4に圧入し、弾性部
材7の弾性により第2の玉軸受6の内輪62に予圧を付
加する。Finally, the hub 1 is press-fitted into the shaft member 4, and the elastic force of the elastic member 7 applies a preload to the inner ring 62 of the second ball bearing 6.
【0033】また、別の組立方法では、第1の玉軸受5
の外輪51を軸受保持部材2に、内輪52を軸部材4に
接着あるいは圧入する。そして、第2の玉軸受6の内輪
62と軸部材4とを硬化の遅い接着剤で、外輪61と軸
受保持部材2とを硬化の速い接着剤で接着する。弾性部
材7を第2の玉軸受6の内輪上端面62aに装着し、ハ
ブ1を軸部材4に圧入してもよい。In another assembly method, the first ball bearing 5
The outer ring 51 and the inner ring 52 are bonded or press-fitted to the bearing holding member 2 and the shaft member 4, respectively. Then, the inner ring 62 of the second ball bearing 6 and the shaft member 4 are bonded with a slow-curing adhesive, and the outer ring 61 and the bearing holding member 2 are bonded with a fast-curing adhesive. The elastic member 7 may be attached to the inner ring upper end surface 62a of the second ball bearing 6 and the hub 1 may be press-fitted into the shaft member 4.
【0034】更に別の実施例としては図2の如く、軸部
材204の中央部に拡径部241を設ける。As another embodiment, as shown in FIG. 2, an enlarged diameter portion 241 is provided in the central portion of the shaft member 204.
【0035】まず、第1の玉軸受205の内輪上端面2
52aが、軸部材204の拡径部241の下端面241
aに当設するように軸部材204に接着あるいは圧入す
る。外輪251は軸受保持部材202に接着する。First, the inner ring upper end surface 2 of the first ball bearing 205
52a is the lower end surface 241 of the expanded diameter portion 241 of the shaft member 204.
The shaft member 204 is adhered or press-fitted so as to be abutted on a. The outer ring 251 is bonded to the bearing holding member 202.
【0036】次に、第2の玉軸受206を軸部材204
と軸受保持部材202の間に挿入し内輪262と軸部材
204とを硬化の遅い接着剤で、外輪261と軸受保持
部材202とを硬化の速い接着剤で接着する。弾性部材
207を第2の玉軸受206の内輪上端面262aに装
着しハブ201を軸部材204に圧入する。Next, the second ball bearing 206 is attached to the shaft member 204.
And the bearing holding member 202, and the inner ring 262 and the shaft member 204 are bonded with a slow-curing adhesive, and the outer ring 261 and the bearing holding member 202 are bonded with a fast-curing adhesive. The elastic member 207 is attached to the inner ring upper end surface 262a of the second ball bearing 206, and the hub 201 is press-fitted into the shaft member 204.
【0037】この構造を用いれば軸部材204の加工が
煩雑にはなるが、押圧部材を用いる必要がなくなり、軸
部材204の端面242が第1の玉軸受205の内輪下
端面252bよりも突出していても予圧の付加が容易に
可能となる。If this structure is used, the processing of the shaft member 204 becomes complicated, but it is not necessary to use a pressing member, and the end surface 242 of the shaft member 204 projects beyond the inner ring lower end surface 252b of the first ball bearing 205. However, the preload can be added easily.
【0038】以上、本発明に従うスピンドルモータの一
実施例について説明したが、本発明はかかる実施例に限
定されるものではなく、本発明の範囲を逸脱することな
く種々の変形乃至修正が可能である。Although one embodiment of the spindle motor according to the present invention has been described above, the present invention is not limited to this embodiment, and various variations and modifications can be made without departing from the scope of the present invention. is there.
【0039】例えば、本実施例のスピンドルモータは軸
回転型であったが、軸固定型のモータであってもよい。For example, although the spindle motor of this embodiment is of the shaft rotation type, it may be of the shaft fixed type.
【0040】また、第2の玉軸受6の内輪上部面62a
に弾発部材7が当設し、内輪62の内輪固定面4aに比
較的硬化の遅い接着剤用いたが、軸受保持部材2に内方
張出部21を設けず、2つの内輪固定面4a、4b及び
第1の玉軸受5の外輪51を比較的硬化の速い接着剤を
用い、第2の玉軸受6の外輪61を比較的硬化の遅い接
着剤を用いて接着し、弾発部材7の弾性が第2の玉軸受
6の外輪61に作用するように構成しても良い。The inner ring upper surface 62a of the second ball bearing 6
The elastic member 7 is abutted on the inner ring 62, and an adhesive having a relatively slow curing is used for the inner ring fixing surface 4a of the inner ring 62. However, the bearing holding member 2 is not provided with the inward protruding portion 21, and the two inner ring fixing surfaces 4a are not provided. 4b and the outer ring 51 of the first ball bearing 5 are bonded with an adhesive that cures relatively quickly, and the outer ring 61 of the second ball bearing 6 is bonded with an adhesive that cures relatively slowly. May be configured to act on the outer ring 61 of the second ball bearing 6.
【0041】[0041]
【発明の効果】本発明のスピンドルモータにおいては、
軸部材と軸受の間に弾性部材を介在させて軸受に予圧を
付加させて定位置に固定したことにより、確実にしかも
容易に予圧を付加する事ができる。According to the spindle motor of the present invention,
Since an elastic member is interposed between the shaft member and the bearing to apply a preload to the bearing and fix the bearing at a fixed position, the preload can be applied reliably and easily.
【図1】本発明の一実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.
【図2】本発明に従う別の実施例を示す断面図である。FIG. 2 is a sectional view showing another embodiment according to the present invention.
【図3】従来の技術を示す断面図である。FIG. 3 is a cross-sectional view showing a conventional technique.
1 ハブ 2 軸受保持部材 3 ステータ 4 軸部材 5 第1の玉軸受 6 第2の玉軸受 7 弾発部材 8 押圧部材 35 ロータマグネット 1 hub 2 bearing holding member 3 stator 4 shaft member 5 first ball bearing 6 second ball bearing 7 resilient member 8 pressing member 35 rotor magnet
Claims (1)
回転自在である回転部材と、該静止部材と該回転部材と
の間に介在されて、予め軸線方向の定位置に位置決めさ
れて予圧が付加される一対の軸受部材と、を備えたスピ
ンドルモータにおいて、 該一対の軸受部材のうち、少なくとも一方の軸受部材と
該静止部材及び/または該回転部材との間に弾発部材を
内装して、該軸受部材の内輪部または外輪部に予圧を付
加して該軸受部材を該静止部材及び/または該回転部材
に固着したことを特徴とするスピンドルモータ。1. A stationary member, a rotating member which is rotatable relative to the stationary member, and an interposition between the stationary member and the rotating member, which is positioned in advance at a fixed position in the axial direction. And a pair of bearing members to which a preload is applied, a resilient member is provided between at least one of the pair of bearing members and the stationary member and / or the rotating member. A spindle motor, characterized by being internally mounted and applying a preload to an inner ring portion or an outer ring portion of the bearing member to fix the bearing member to the stationary member and / or the rotating member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4135960A JP2996805B2 (en) | 1992-04-28 | 1992-04-28 | Spindle motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4135960A JP2996805B2 (en) | 1992-04-28 | 1992-04-28 | Spindle motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05308745A true JPH05308745A (en) | 1993-11-19 |
JP2996805B2 JP2996805B2 (en) | 2000-01-11 |
Family
ID=15163873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4135960A Expired - Fee Related JP2996805B2 (en) | 1992-04-28 | 1992-04-28 | Spindle motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2996805B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000051598A (en) * | 1999-01-23 | 2000-08-16 | 이형도 | A spindle motor |
US6489699B2 (en) | 2000-07-27 | 2002-12-03 | Sanyo Denki Co., Ltd. | Motor with a shaft supported by ball bearings |
-
1992
- 1992-04-28 JP JP4135960A patent/JP2996805B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20000051598A (en) * | 1999-01-23 | 2000-08-16 | 이형도 | A spindle motor |
US6489699B2 (en) | 2000-07-27 | 2002-12-03 | Sanyo Denki Co., Ltd. | Motor with a shaft supported by ball bearings |
Also Published As
Publication number | Publication date |
---|---|
JP2996805B2 (en) | 2000-01-11 |
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