JPH02276450A - Spindle motor - Google Patents
Spindle motorInfo
- Publication number
- JPH02276450A JPH02276450A JP9700089A JP9700089A JPH02276450A JP H02276450 A JPH02276450 A JP H02276450A JP 9700089 A JP9700089 A JP 9700089A JP 9700089 A JP9700089 A JP 9700089A JP H02276450 A JPH02276450 A JP H02276450A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- external flange
- hub body
- flange part
- outer flange
- 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
- 239000000463 material Substances 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010949 copper Substances 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000002849 thermal shift Methods 0.000 description 2
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Brushless Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスピンドルモータに係り、特にディスク用スピ
ンドルモータに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a spindle motor, and particularly to a disk spindle motor.
−ａに、小型のスピンドルモータのハブの外形部の仕上
加工は、スピンドルモータとして組立完成後にそのモー
タ自体を回転駆動させて、切削加工又は研削加工を行な
っていた。-a, in order to finish the outer shape of the hub of a small spindle motor, cutting or grinding was performed by rotating the motor itself after the spindle motor was assembled and completed.
最近、磁気ディスクや光ディスク等の小型化に伴って、
これを駆動するスピンドルモータも一層小型化されるよ
うになってきた。そのため、上記のモータ自体の回転駆
動のトルクが不足し、特にステンレス鋼等の無切削の材
料をハブに使用したモータでは、ハブの外フランジ部の
仕上加工が至難となってきた。Recently, with the miniaturization of magnetic disks and optical disks,
The spindle motor that drives this has also become more compact. As a result, the rotational drive torque of the motor itself is insufficient, and finishing of the outer flange portion of the hub has become extremely difficult, especially in motors whose hubs are made of uncut materials such as stainless steel.
本発明はこのような問題点を解決するために、ハブが、
鉄鋼材から成るハブ本体と、該ハブ本体の一端外周縁に
一体状に固着される良切削材の固定外フランジ部と、か
ら構成され、さらに、ディスク固定用クランプが上記ハ
ブ本体と同材質とされると共に、該クランプの外周縁に
付設された着脱外フランジ用リング体を上記外フランジ
部と同材質かつ同一断面形状とした。In order to solve these problems, the present invention aims to provide a hub that
It consists of a hub body made of steel, and a fixed outer flange made of a well-cut material that is integrally fixed to the outer peripheral edge of one end of the hub body, and further, a disk fixing clamp is made of the same material as the hub body. In addition, the ring body for the detachable outer flange attached to the outer peripheral edge of the clamp is made of the same material and has the same cross-sectional shape as the outer flange portion.
組立完成後のモータ自体の回転トルクでも、ハブの良切
削材の固定外フランジ部ならば、容易にかつ高精度に仕
上加工が可能となる。Even with the rotational torque of the motor itself after assembly is completed, if the fixed outer flange portion of the hub is made of a well-cut material, it is possible to finish it easily and with high precision.
着脱外フランジ用リング体が、固定外フランジ部と同材
質でかつ同一断面形状としたから、ハブ組付体として全
体が均一な熱膨張をして、サーマルシフト等の悪影響を
除去できる。Since the removable outer flange ring body is made of the same material and has the same cross-sectional shape as the fixed outer flange portion, the entire hub assembly can undergo uniform thermal expansion and eliminate adverse effects such as thermal shift.
以下、図示の実施例を説明する。 The illustrated embodiment will be described below.
第１図と第２図に於て、ｌはブラケットであって、フラ
ンジ部２と円筒部３とから成り、その円筒部３内に一対
のベアリング４．４を介して回転軸５が枢支され、該回
転軸５の一端にハブ６が固着される。７はステークであ
って上記円筒部３の外周面に固着されている。In FIGS. 1 and 2, reference numeral l denotes a bracket consisting of a flange portion 2 and a cylindrical portion 3, within which a rotating shaft 5 is pivotally supported via a pair of bearings 4.4. A hub 6 is fixed to one end of the rotating shaft 5. A stake 7 is fixed to the outer peripheral surface of the cylindrical portion 3.
ハブ６は平面部８と円筒部９とから成る有底鋺型であり
、ステータ７及び円筒部３を包囲する。The hub 6 is a bottomed peg-like shape consisting of a flat part 8 and a cylindrical part 9, and surrounds the stator 7 and the cylindrical part 3.
３０はロータマグネットであって、ハブ６の内周面に固
着され、所定の微小間隙をもってステータ７に対向して
いる。A rotor magnet 30 is fixed to the inner peripheral surface of the hub 6 and faces the stator 7 with a predetermined minute gap.
しかして、このハブ６は、ステンレス鋼やその他の鋼等
の鉄鋼材から成るハブ本体１０と、該ハブ本体１０の一
端外周縁に一体状に焼ばめや圧入等にて固着されたアル
ミニウムやその他の軽合金や銅系金属等の良切削材の固
定外フランジ部１．１と、から構成されている。つまり
、ハブ本体１０は、（同図上方の）平面部８の上面の外
周寄りに環状切欠部１２を有し、かつ、（同図下方の）
一端の外周縁に中周凸条１３を小鍔状に有する。そして
、固定外フランジ部１１は、横断面に於て、上記中周凸
条１３と同一形状の切欠部１４を有する矩形状であり、
該固定外フランジ部１１の切欠部１４に、ハブ本体１０
の中周凸条１３を嵌込状として、前述のように一体化す
るように固着し、磁気ディスク１５・・・が装着された
状態で、この固定外フランジ部１１がその一端面を受け
る。The hub 6 consists of a hub body 10 made of a steel material such as stainless steel or other steel, and an aluminum body 10 that is integrally fixed to the outer periphery of one end of the hub body 10 by shrink fit, press fit, etc. The fixed outer flange portion 1.1 is made of a material with good cutting properties such as other light alloys or copper-based metals. In other words, the hub body 10 has an annular notch 12 near the outer periphery of the upper surface of the flat part 8 (in the upper part of the figure), and (in the lower part in the figure)
The outer circumferential edge of one end has a medium circumferential convex strip 13 shaped like a small brim. The fixed outer flange portion 11 is rectangular in cross section and has a cutout portion 14 having the same shape as the intermediate circumferential protrusion 13;
The hub body 10 is inserted into the notch 14 of the fixed outer flange 11.
The intermediate circumferential protrusion 13 is fitted in and fixed as one unit as described above, and the fixed outer flange portion 11 receives one end surface of the magnetic disk 15 when it is attached.
また、１６はディスク固定用クランプであって、ハブ６
と同じ鉄鋼材から成り、ハブ本体１０の前記環状切欠部
１２に嵌着され、ビス等の固着具１７にて着脱自在に固
着される。 １８は該クランプ１６の外周縁に付設され
た着脱外フランジ用リング体であって、該リング体１８
の材質は前記外フランジ部１１と同一とし、かつ同一断
面形状とする。即ち、図面で明らかなように、クランプ
１６には、前記中周凸条１３と同一断面形状の中周凸条
１９を設けて、ハブ本体１０の外周面よりも僅かに突出
状とすると共に、リング体１８には、この中周凸条１９
に嵌込まれる切欠部２０を形成する。Further, 16 is a disk fixing clamp, and the hub 6
It is made of the same steel material as the hub body 10, and is fitted into the annular notch 12 of the hub body 10, and is removably fixed with a fixing device 17 such as a screw. Reference numeral 18 denotes a ring body for a removable outer flange attached to the outer peripheral edge of the clamp 16, and the ring body 18
is made of the same material as the outer flange portion 11 and has the same cross-sectional shape. That is, as is clear from the drawings, the clamp 16 is provided with a middle circumferential protruding strip 19 having the same cross-sectional shape as the middle circumferential protruding strip 13, so as to project slightly from the outer circumferential surface of the hub body 10. The ring body 18 has this middle circumferential protrusion 19.
A notch 20 is formed into which the cutout 20 is fitted.
このようにして、磁気ディスク１５・・・は、外フラン
ジ部１１とリング体１８にて、両端面から挾若状に保持
されることとなり、しかも、ハブ６の軸方向略中央平面
Ｐ（第２図参照）に関して、固定の外フランジ部１１と
着脱可能な外フランジ用リング体１８とが、形状のみな
らず材質の相違させる配置の点から見ても、対称形を成
している。In this way, the magnetic disks 15... are held in a pinched manner from both end surfaces by the outer flange portion 11 and the ring body 18, and moreover, the magnetic disks 15... are held in a pinch-like manner from both end surfaces. 2), the fixed outer flange portion 11 and the removable outer flange ring body 18 are symmetrical not only in shape but also in terms of the arrangement of the different materials.
なお、ハブ本体１０に外フランジ部１１を焼ばめや圧入
等にて固着一体化した後、さらにモータとして組立完了
後に、ステータ７に電流を実際に流して回転させ、その
回転トルクを利用して、上記外フランジ部１１の特に磁
気ディスク対応面Ｑを、研削又は切削にて仕上加工する
。従来はこの部位の仕上加工は、ハブ全体がステンレス
鋼等の難切削材である場合、橿めて難しく、寸法精度及
び表面仕上公差が、十分に得られていなかったが、上述
のように、外フランジ部１１がアルミニウム等の良切削
材であるから、十分な寸法精度と良好な仕上面が得られ
る。そして、第１図に示す磁気ディスク１５・・・及び
スペーサ２１・・・と、外フランジ部１１とリング体１
８を同−材質又は同一熱膨張材質とすることも望ましい
。Note that after the outer flange portion 11 is fixedly integrated with the hub body 10 by shrink fitting or press fitting, and furthermore, after the motor is assembled, a current is actually applied to the stator 7 to rotate it, and the rotation torque is utilized. Then, the outer flange portion 11, especially the magnetic disk compatible surface Q, is finished by grinding or cutting. In the past, finishing of this part was extremely difficult when the entire hub was made of difficult-to-cut materials such as stainless steel, and sufficient dimensional accuracy and surface finish tolerances were not obtained. Since the outer flange portion 11 is made of a well-cut material such as aluminum, sufficient dimensional accuracy and a good finished surface can be obtained. Then, the magnetic disk 15... and the spacer 21..., the outer flange portion 11, and the ring body 1 shown in FIG.
It is also desirable that 8 be made of the same material or the same thermal expansion material.
なお、図示の実施例のように、ハブ６の軸方向略中央面
Ｐに対して、異なる材質の配置、及び、形状を、夫々対
称となるようにしたから、モータ使用時の昇温に伴って
、部分的に不均一な膨張を生ずることを防止出来て、磁
気ディスク１５・・・の而が振れる等のサーマルシフト
を有効に防止出来る。In addition, as in the illustrated embodiment, the arrangement and shape of the different materials are made symmetrical with respect to the substantially central plane P in the axial direction of the hub 6, so that the temperature increase during use of the motor will increase. Therefore, it is possible to prevent partially non-uniform expansion, and it is possible to effectively prevent thermal shift such as shaking of the magnetic disk 15.
本発明は図示の実施例以外にも設計変更自由であり、モ
ータの形式は他のものであっても、回転するハブを備え
たスピンドルモータであれば応用自由であって、例えば
、モータの軸が固定型の場合、あるいは、ハブの内部に
ロータマグネットやステータを有さないで外部に駆動部
を備えた形式であっても良い。The present invention can be freely modified in design other than the illustrated embodiment, and even if the motor type is other, it can be freely applied as long as it is a spindle motor equipped with a rotating hub. The hub may be of a fixed type, or it may be of a type that does not have a rotor magnet or stator inside the hub but has a drive section outside.
本発明は上述の構成により、特に小型のスピンドルモー
タであって、ハブがステンレス鋼等の無切削材質の場合
に、有効であって、磁気ディスク１５・・・の一端面を
当接状に受ける外フランジ部１１を、組立完成後のモー
タの駆動トルクでも十分に平滑かつ高精度に容易に仕上
加工が行ない得る。さらに、ディスク１５及びスペーサ
２１等と、外フランジ部１１とリング体１８を同一材質
とすることも容易となり、熱膨張による悪影響を一層容
易に除去出来ることとなる。Due to the above-described configuration, the present invention is particularly effective in a small spindle motor in which the hub is made of a non-cutting material such as stainless steel, and is adapted to abut one end surface of the magnetic disk 15. The outer flange portion 11 can be easily finished smoothly and with high precision even with the drive torque of the motor after assembly is completed. Furthermore, it becomes easy to make the disk 15, the spacer 21, etc., the outer flange portion 11, and the ring body 18 of the same material, and the adverse effects of thermal expansion can be more easily removed.
第１図は本発明の一実施例を示す要部断面図、第２図は
その説明図である。
６・・・ハブ、１０・・・ハブ本体、１１・・・外フラ
ンジ部、１６・・・クランプ、１８・・・リング体。
第
図
第２FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, and FIG. 2 is an explanatory view thereof. 6... Hub, 10... Hub body, 11... Outer flange portion, 16... Clamp, 18... Ring body. Figure 2
Claims (1)
本体１０の一端外周縁に一体状に固着される良切削材の
固定外フランジ部１１と、から構成され、さらに、ディ
スク固定用クランプ１６が上記ハブ本体１０と同材質と
されると共に、該クランプ１６の外周縁に付設された着
脱外フランジ用リング体１８を上記外フランジ部１１と
同材質かつ同一断面形状としたことを特徴とするスピン
ドルモータ。1. The hub 6 is composed of a hub body 10 made of steel, and a fixed outer flange part 11 made of a well-cutting material that is integrally fixed to the outer peripheral edge of one end of the hub body 10, and further includes a fixed outer flange part 11 for fixing the disk. The clamp 16 is made of the same material as the hub body 10, and the detachable outer flange ring 18 attached to the outer periphery of the clamp 16 is made of the same material and has the same cross-sectional shape as the outer flange portion 11. spindle motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1097000A JP2660745B2 (en) | 1989-04-17 | 1989-04-17 | Spindle motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1097000A JP2660745B2 (en) | 1989-04-17 | 1989-04-17 | Spindle motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02276450A true JPH02276450A (en) | 1990-11-13 |
| JP2660745B2 JP2660745B2 (en) | 1997-10-08 |
Family
ID=14179939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1097000A Expired - Lifetime JP2660745B2 (en) | 1989-04-17 | 1989-04-17 | Spindle motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2660745B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61148667A (en) * | 1984-12-20 | 1986-07-07 | Fujitsu Ltd | Attaching structure of magnetic disc |
| JPS6222269A (en) * | 1985-07-19 | 1987-01-30 | Tokico Ltd | Magnetic disc device |
| JPS6359757A (en) * | 1986-08-27 | 1988-03-15 | Sankyo Seiki Mfg Co Ltd | Disk drive motor |
-
1989
- 1989-04-17 JP JP1097000A patent/JP2660745B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61148667A (en) * | 1984-12-20 | 1986-07-07 | Fujitsu Ltd | Attaching structure of magnetic disc |
| JPS6222269A (en) * | 1985-07-19 | 1987-01-30 | Tokico Ltd | Magnetic disc device |
| JPS6359757A (en) * | 1986-08-27 | 1988-03-15 | Sankyo Seiki Mfg Co Ltd | Disk drive motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2660745B2 (en) | 1997-10-08 |
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Legal Events
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|---|---|---|---|
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