JP3054210B2 - Spindle motor and hub member processing method - Google Patents
Spindle motor and hub member processing methodInfo
- Publication number
- JP3054210B2 JP3054210B2 JP3044139A JP4413991A JP3054210B2 JP 3054210 B2 JP3054210 B2 JP 3054210B2 JP 3044139 A JP3044139 A JP 3044139A JP 4413991 A JP4413991 A JP 4413991A JP 3054210 B2 JP3054210 B2 JP 3054210B2
- Authority
- JP
- Japan
- Prior art keywords
- hub
- bracket
- cylindrical wall
- hub member
- wall portion
- 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.)
- Expired - Fee Related
Links
Landscapes
- Motor Or Generator Frames (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、磁気ディスクの如き記
録ディスクを回転駆動するためのスピンドルモータ及び
ハブ部材の加工方法に関する。BACKGROUND OF THE INVENTION This invention, and a spindle motor for rotating such recording disk of the magnetic disk
The present invention relates to a method for processing a hub member .
【０００２】[0002]
【従来の技術】一般に、スピンドルモータは、ブラケッ
トと、このブラケットに対して相対的に回転自在である
ハブ部材と、ブラケットとハブ部材との間に介在された
軸受手段を備えている。ハブ部材にはロータマグネット
が装着され、このロータマグネットに対向してステータ
がブラケットに装着され、記録ディスクは所定方向に回
転駆動されるハブ部材に装着される。2. Description of the Related Art Generally, a spindle motor includes a bracket, a hub member rotatable relative to the bracket, and bearing means interposed between the bracket and the hub member. A rotor magnet is mounted on the hub member, a stator is mounted on the bracket so as to face the rotor magnet, and the recording disk is mounted on a hub member that is driven to rotate in a predetermined direction.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この種
のスピンドルモータには、次の通りの解決すべき問題が
存在する。第１に、近年、小型化及び薄型化の傾向にあ
るが、小型化及び薄型化するとハブ部材を回転自在に確
実に支持するのが困難となる。However, this type of spindle motor has the following problems to be solved. First, in recent years, there has been a tendency to be smaller and thinner. However, when the size and thickness are reduced, it becomes difficult to reliably support the hub member rotatably.
【０００４】第２に、軸受手段からのグリース等がディ
スク室に進入するのを防止する必要があるが、そのため
の構造が複雑であり、従来の構造ではモータの小型化及
び薄型化を達成するのが困難である。Second, it is necessary to prevent grease or the like from the bearing means from entering the disk chamber. However, the structure for this purpose is complicated, and the conventional structure achieves a reduction in the size and thickness of the motor. Is difficult.
【０００５】また、上述のスピンドルモータにおけるハ
ブ部材は、一端が開放されたハブ本体を有するが、従来
の加工方法ではこのハブ本体を容易に加工するのが困難
で、また加工する際材料の一部を不要に切削除去してい
る。The hub member of the spindle motor has a hub body having one end opened. However, it is difficult to easily process the hub body by a conventional processing method. Unnecessary cutting and removal of parts.
【０００６】本発明の第１の課題は、ハブ部材を回転自
在に確実に支持することができ、しかもモータ全体の小
型化及び薄型化を達成することができるスピンドルモー
タを提供することである。A first object of the present invention is to provide a spindle motor capable of securely supporting a hub member rotatably and achieving a reduction in size and thickness of the entire motor.
【０００７】本発明の第２の課題は、材料を無駄なく使
用し、且つ容易に加工することができるハブ部材の加工
方法を提供することである。[0007] A second object of the present invention is to provide a method for processing a hub member which can use a material without waste and can be easily processed.
【０００８】[0008]
【課題を解決するための手段】本発明のスピンドルモー
タでは、ブラケットは、単一の部品により構成されて、
プレート状のブラケット本体と、ブラケット本体の内周
部に設けられた内円筒壁部と、ブラケット本体の外周部
に設けられた外円筒壁部とを一体に有し、ハブ部材は、
単一の部品により構成されて、下方が開放されたハブ部
材と、ハブ本体の中央部から下方に延びる軸部と、ハブ
本体の下端部に設けられたフランジ部と、フランジ部か
ら下方に延びる垂下円筒部を一体に有し、前記軸部はブ
ラケットの内円筒壁部の内側にて略ブラケット本体まで
延びると共に内円筒壁部は軸部の基部近傍まで延び、こ
の軸部と内円筒壁部の間に軸受手段が介在され、ハブ部
材の垂下円筒部はブラケットの外円筒壁部の外円筒壁部
の内側にてブラケット本体近傍まで延び、外円筒壁部と
協働してエアーシール構造を構成している。According to the spindle motor of the present invention, the bracket is constituted by a single part.
A plate-shaped bracket body, an inner cylindrical wall portion provided on an inner peripheral portion of the bracket body, and an outer cylindrical wall portion provided on an outer peripheral portion of the bracket body are integrally formed .
A hub member which is constituted by a single component and which is open at the bottom, a shaft extending downward from the center of the hub body, a flange provided at a lower end of the hub body, and extending downward from the flange. The shaft portion extends integrally to the bracket body inside the inner cylindrical wall portion of the bracket, and the inner cylindrical wall portion extends to near the base of the shaft portion. Between the bearing means, the hanging cylindrical portion of the hub member extends to the vicinity of the bracket body inside the outer cylindrical wall portion of the outer cylindrical wall portion of the bracket, and cooperates with the outer cylindrical wall portion to form an air seal structure. Make up.
【０００９】本発明のハブ部材の加工方法では、ハブ中
間体に記録ディスクを固定するための雌ねじ部を形成
し、この雌ねじ部に着脱自在にボス部材を螺合しボス部
材を保持してハブ中間体の仕上加工を施す。In the method of processing a hub member according to the present invention, a female screw portion for fixing a recording disk to a hub intermediate body is formed, a boss member is detachably screwed to the female screw portion, and the hub member is held by holding the boss member. Finish the intermediate.
【００１０】[0010]
【作用】本発明のスピンドルモータにおいては、ハブ部
材の軸部はブラケットの内円筒壁部の内側にて略ブラケ
ット本体まで延びると共に内円筒壁部は軸部の基部近傍
まで延びているので、前記軸部と内円筒壁部の半径方向
の重なりを十分大きくすることができ、モータを小型化
及び薄型化した場合においてもハブ部材を確実に支持す
ることができる。また、ハブ部材の垂下円筒部はブラケ
ットの外円筒壁部の内側にてブラケット本体近傍まで延
び、外円筒壁部と協働してエアーシール構造を構成して
いるので、従来の如く専用のシール構造を採用する必要
がなく、モータに小型化及び薄型化が効果的に達成され
る。In the spindle motor according to the present invention, the shaft portion of the hub member extends substantially inside the inner cylindrical wall portion of the bracket to the bracket main body and the inner cylindrical wall portion extends to near the base of the shaft portion. The overlap of the shaft portion and the inner cylindrical wall portion in the radial direction can be sufficiently increased, and the hub member can be reliably supported even when the motor is reduced in size and thickness. Also, the hanging cylindrical portion of the hub member extends to the vicinity of the bracket body inside the outer cylindrical wall portion of the bracket, and forms an air seal structure in cooperation with the outer cylindrical wall portion. There is no need to employ a structure, and the motor can be effectively reduced in size and thickness.
【００１１】本発明のハブ部材の加工方法においては、
ハブ部材を仕上げ加工する際に、ハブ中間体に形成され
た雌ねじ部にボス部材を着脱自在に螺合するので、加工
の際このボス部を加工装置（例えば旋盤）でチャックす
るのみでよく、従って材料を無駄に使用することはな
く、またその加工も容易となる。In the method for processing a hub member according to the present invention,
At the time of finishing the hub member, the boss member is detachably screwed into the female screw portion formed on the hub intermediate body, so that the boss portion need only be chucked with a processing device (for example, a lathe) at the time of processing. Therefore, the material is not wasted and the processing is easy.
【００１２】[0012]
【実施例】以下、添付図面を参照して、更に詳述する。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
【００１３】図１は、本発明に従うスピンドルモータの
一実施例を示す。図１において、図示のスピンドルモー
タは、ブラケット２と、このブラケット２に対して相対
的に回転自在であるハブ部材４を具備している。ブラケ
ット２は、単一の部品により構成されて、略円形状のブ
ラケット本体６を備え、このブラケット本体６は実質上
平坦に延びている。ブラケット本体６の内周部には上方
に延びる内円筒壁部８が一体に設けられ、またその外周
部には上方に延びる外円筒壁部１０が一体に設けられて
いる。外円筒壁部１０の外周面には、半径方向外方に延
びる取付フランジ部１２が一体に設けられ、この取付フ
ランジ部１２が記録ディスクを駆動する駆動装置のフレ
ーム（図示せず）に装着される。実施例では、取付フラ
ンジ部１２の上面１２ａが上記フレームの下面に当接さ
れ、上記上面１２ａが基準面としてフレームに取り付け
られ、これによって駆動装置を薄型化する工夫がなされ
ている。FIG. 1 shows an embodiment of a spindle motor according to the present invention. In FIG. 1, the illustrated spindle motor includes a bracket 2 and a hub member 4 that is rotatable relative to the bracket 2. The bracket 2 is composed of a single component and includes a substantially circular bracket body 6 which extends substantially flat. The inner peripheral portion of the bracket body 6 cylindrical wall portion 8 inner upwardly extending integrally provided, also at its outer periphery an outer cylindrical wall portion 10 extending upwardly are provided integrally. A mounting flange portion 12 extending radially outward is provided integrally on the outer peripheral surface of the outer cylindrical wall portion 10, and the mounting flange portion 12 is mounted on a frame (not shown) of a drive device for driving a recording disk. You. In the embodiment, the upper surface 12a of the mounting flange portion 12 is in contact with the lower surface of the frame, and the upper surface 12a is mounted on the frame as a reference surface, whereby the drive device is designed to be thin.
【００１４】ハブ部材４は、単一の部品により構成され
て、一端（下端）が開放されたハブ本体１４を具備して
いる。ハブ本体１４は他端部（上端部）に設けられた端
壁部１６を有し、この端壁部１６の中央部には下方に延
びる軸部１８が一体に形成されている。このハブ部材４
には端壁部１６を貫通して軸部１８まで延びる雌ねじ部
２０が形成されている。The hub member 4 is constituted by a single part.
And a hub body 14 having one end (lower end) opened. The hub body 14 has an end wall 16 provided at the other end (upper end), and a shaft 18 extending downward is integrally formed at the center of the end wall 16. This hub member 4
Is formed with a female screw portion 20 extending through the end wall portion 16 to the shaft portion 18.
【００１５】ハブ本体１４の下端部には、半径方向外方
に延びる環状フランジ部２２が一体に設けられている。
また、フランジ部２２には、下方に延びる垂下円筒部２
４が一体に設けられている。上述のハブ部材４は例えば
鉄等の磁性材料から形成することができ、その加工の際
には後述する如く加工するのが望ましい。An annular flange 22 extending outward in the radial direction is integrally provided at the lower end of the hub body 14.
The flange portion 22 includes a downwardly extending cylindrical portion 2 extending downward.
4 are provided integrally. The above-mentioned hub member 4 can be formed from a magnetic material such as iron, for example, and it is desirable to process the hub member 4 as described later.
【００１６】ブラケット２とハブ部材４との間には軸受
手段が介在されている。図示の軸受手段は一対の球軸受
２６から構成され、ブラケット２の内円筒壁部８とハブ
部材４の軸部１８との間に配設されている。軸部１８は
ブラケット２の内円筒壁部８の内側に配置され、その自
由端部はブラケット本体６に形成された開口を通してブ
ラケット本体６の外面（下面）近傍まで延び、また内円
筒壁部８はハブ部材４の軸部１８近傍、即ち端部壁１６
の内面近傍まで延びている。かく構成することによっ
て、内円筒壁部８と軸部１８の半径方向の重なり領域が
大きくなり、かかる重なり領域の両端部に一対の球軸受
２６を配置する（詳細には、内円筒壁部８の基部と軸部
１８の自由端部との間に片方の球軸受２６を配置し、内
円筒壁部８の自由端部と軸部１８との間に他方の球軸受
２６を配置している）ことによって、ハブ部材４を回転
自在に且つ確実に支持している。Bearing means is interposed between the bracket 2 and the hub member 4. The illustrated bearing means comprises a pair of ball bearings 26, and is disposed between the inner cylindrical wall portion 8 of the bracket 2 and the shaft portion 18 of the hub member 4. Shank 18 is disposed inside the inner cylindrical wall portion 8 of the bracket 2, its free end extends through an opening formed in the bracket body 6 to the outer surface (lower surface) near the bracket body 6, also the inner cylindrical wall portion 8 Is near the shaft portion 18 of the hub member 4, that is, the end wall 16
Extends to the vicinity of the inner surface. With such a configuration, the radial overlapping region between the inner cylindrical wall portion 8 and the shaft portion 18 becomes large, and a pair of ball bearings 26 are disposed at both ends of the overlapping region (specifically, the inner cylindrical wall portion 8 One ball bearing 26 is arranged between the base of the shaft member 18 and the free end of the shaft 18, and the other ball bearing 26 is arranged between the free end of the inner cylindrical wall 8 and the shaft 18. ), The hub member 4 is rotatably and securely supported.
【００１７】ハブ部材４の垂下円筒部２４の内周面に
は、環状のロータマグネット２８が装着されている。ま
た、このロータマグネット２８に対向してステータ３０
がブラケット２の内円筒壁部８の外周面に取り付けられ
ている。ステータ３０は、複数枚のプレート部材を積層
することによって形成されるステータコア３２とステー
タコア３２に巻かれたコイル３４を有している。An annular rotor magnet 28 is mounted on the inner peripheral surface of the hanging cylindrical portion 24 of the hub member 4. The stator 30 faces the rotor magnet 28.
Is attached to the outer peripheral surface of the inner cylindrical wall portion 8 of the bracket 2. The stator 30 has a stator core 32 formed by laminating a plurality of plate members, and a coil 34 wound around the stator core 32.
【００１８】磁気ディスクの如き記録ディスク（図示せ
ず）は、ハブ部材４に装着される。即ち、実施例では、
１枚の記録ディスクをハブ部材４の環状フランジ部２２
の上面に載置した後固定用ねじ（図示せず）を雌ねじ部
２０に螺合してクランプ部材（図示せず）を取り付ける
ことによって、上記記録ディスクがフランジ部２２とク
ランプ部材の間に所要の通りクランプされる。A recording disk (not shown) such as a magnetic disk is mounted on the hub member 4. That is, in the embodiment,
One recording disk is connected to the annular flange portion 22 of the hub member 4.
After the recording disk is placed on the upper surface of the optical disk, a fixing screw (not shown) is screwed into the female screw portion 20 and a clamp member (not shown) is attached, so that the recording disk is required between the flange portion 22 and the clamp member. As clamped.
【００１９】実施例では、更に、次の通り構成されてい
る。ハブ部材４の垂下円筒部２４はブラケット２の外円
筒壁部１０の内側にてその内周面に沿って延び、この垂
下円筒部２４と外円筒壁部１０は、相互に協働してエア
ーシール構造を構成している。これら両者間に所望のシ
ール効果を持たせるには、外円筒壁部１０の内周面と垂
下円筒部２４の外周面との間隔を０．３mm以下に設定す
るのが好ましい。また、外円筒壁部１０と垂下円筒部２
４の半径方向の重なり長さ（両者の重なり部分の軸線方
向の長さ）を１．５mm以上に設定するのが好ましい。か
く構成することによって、磁性流体等を用いた専用のシ
ール機構を採用することなく、球軸受２６から飛散した
グリース等の不純物が両者間を通ってディスク室（記録
ディスクが収容される室）に進入するのを効果的に防止
することができ、モータ全体の小型化及び薄型化が達成
される。また、実施例の如く、エアーシール構造を半径
方向に見て外側部位に配置することにより、エアーの収
束を向上させてシール効果を一層高めることができる。The embodiment is further configured as follows. The hanging cylindrical portion 24 of the hub member 4 extends along the inner peripheral surface inside the outer cylindrical wall portion 10 of the bracket 2, and the hanging cylindrical portion 24 and the outer cylindrical wall portion 10 cooperate with each other to form air. It constitutes a seal structure. In order to provide a desired sealing effect between the two, it is preferable to set the interval between the inner peripheral surface of the outer cylindrical wall portion 10 and the outer peripheral surface of the hanging cylindrical portion 24 to 0.3 mm or less. Further, the outer cylindrical wall portion 10 and the hanging cylindrical portion 2
It is preferable to set the overlapping length in the radial direction of No. 4 (the length of the overlapping portion in the axial direction) to 1.5 mm or more. With such a configuration, impurities such as grease scattered from the ball bearing 26 pass between the two and enter the disk chamber (a chamber for accommodating the recording disk) without employing a dedicated sealing mechanism using a magnetic fluid or the like. Intrusion can be effectively prevented, and the overall size and thickness of the motor can be reduced. Further, as in the embodiment, by arranging the air seal structure at an outer portion when viewed in the radial direction, the convergence of air can be improved and the sealing effect can be further enhanced.
【００２０】尚、外円筒壁部１０と垂下円筒部２４の間
隔、及びこれら両者の重なり長さは適宜設定することが
できるが、一層効果的にグリース等の進入を防止するた
めには、上記間隔を１．０mm以下に、また両者の重なり
長さを２．０mm以上に設定するのが望ましい。The distance between the outer cylindrical wall portion 10 and the hanging cylindrical portion 24 and the length of overlap between them can be set as appropriate. However, in order to more effectively prevent grease or the like from entering, It is desirable to set the interval to 1.0 mm or less and the overlap length of both to 2.0 mm or more.
【００２１】上述のハブ部材４は、例えば次の通りに加
工することができる。主として図２を参照して、例えば
ブロック状の部材に切削加工を施してハブ中間体４ａを
形成する。次いで、このハブ中間体４ａの端壁部１６ａ
を貫通して軸部１８ａまで延びる雌ねじ部２０を形成す
る。しかる後、この雌ねじ部２０にボス部材４０を着脱
自在に装着する。実施例のボス部材４０は、一端部に存
在する円筒状のボス部４２と、他端部に存在する雄ねじ
部４４を有し、この雄ねじ部４４がハブ中間体４ａの雌
ねじ部２０に螺合される。そして、旋盤等の加工装置に
よってハブ中間体４ａを仕上加工する際には、上述した
如くして装着されたボス部材４０のボス部４２がチャッ
クに保持され、かく保持した状態にてハブ中間体４ａに
仕上加工が施される（例えば、軸部１８ａの外周面、フ
ランジ部２２ａにおける、記録ディスクが載置される上
面、垂下円筒部２４ａの外周面等に切削加工を施す）。The above-described hub member 4 can be processed, for example, as follows. Referring mainly to FIG. 2, for example, a block intermediate member is subjected to cutting to form a hub intermediate 4a. Next, the end wall portion 16a of the hub intermediate 4a
And a female screw portion 20 extending to the shaft portion 18a. Thereafter, the boss member 40 is detachably attached to the female screw portion 20. The boss member 40 of the embodiment has a cylindrical boss portion 42 at one end and a male screw portion 44 at the other end, and the male screw portion 44 is screwed to the female screw portion 20 of the hub intermediate body 4a. Is done. When the hub intermediate body 4a is finished by a processing device such as a lathe, the boss portion 42 of the boss member 40 mounted as described above is held by the chuck, and the hub intermediate body 4a is held in this state. 4a is finished (for example, the outer peripheral surface of the shaft portion 18a, the upper surface of the flange portion 22a on which the recording disk is mounted, the outer peripheral surface of the hanging cylindrical portion 24a, and the like are cut).
【００２２】本実施例の如く、ハブ中間体４ａにボス部
材４０を着脱自在に螺合するようにすると、加工装置に
保持されるべき部位を設ける必要はなく、従って材料の
無駄をなくして製造コストを下げることができる。When the boss member 40 is detachably screwed to the hub intermediate member 4a as in the present embodiment, there is no need to provide a portion to be held by the processing apparatus, and therefore, the material can be manufactured without waste. Costs can be reduced.
【００２３】以上、本発明に従うスピンドルモータ及び
それに用いるハブ部材の加工方法の一実施例について説
明したが、本発明はこれら実施例に限定されることな
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。While the embodiments of the spindle motor according to the present invention and the method of processing the hub member used therein have been described above, the present invention is not limited to these embodiments, and various modifications may be made without departing from the scope of the present invention. Can be modified or modified.
【００２４】[0024]
【発明の効果】本発明のスピンドルモータにおいては、
ハブ部材の軸部はブラケットの内円筒壁部の内側にて略
ブラケット本体まで延びると共に内円筒壁部は軸部の基
部近傍まで延びているので、前記軸部と内円筒壁部の半
径方向の重なりを十分大きく、従ってこれら両者間に軸
受手段を配設することによってハブ部材を確実に回転自
在に支持することができる。また、ハブ部材の垂下円筒
部はブラケットの外円筒壁部の内側にてブラケット本体
近傍まで延び、外円筒壁部と協働してエアーシール構造
を構成しているので、従来の如く専用のシール構造を採
用する必要がなく、モータに小型化及び薄型化が達成さ
れる。According to the spindle motor of the present invention,
The shaft portion of the hub member extends substantially to the bracket body inside the inner cylindrical wall portion of the bracket, and the inner cylindrical wall portion extends to near the base of the shaft portion. The overlap is sufficiently large, so that by arranging the bearing means between them, the hub member can be reliably supported rotatably. Also, the hanging cylindrical portion of the hub member extends to the vicinity of the bracket body inside the outer cylindrical wall portion of the bracket, and forms an air seal structure in cooperation with the outer cylindrical wall portion. There is no need to employ a structure, and the motor can be reduced in size and thickness.
【００２５】本発明のハブ部材の加工方法においては、
ハブ部材を仕上げ加工する際に、ハブ中間体に形成され
た雌ねじ部にボス部材を着脱自在に螺合するので、仕上
加工の際このボス部を加工装置（例えば旋盤）でチャッ
クするのみでよく、従って材料を無駄に使用することな
く仕上加工することができ、またその加工も容易であ
る。In the method for processing a hub member according to the present invention,
At the time of finishing the hub member, the boss member is detachably screwed into the female screw portion formed on the hub intermediate body. Therefore, the boss portion need only be chucked with a processing device (for example, a lathe) at the time of finishing. Therefore, finishing can be performed without wasteful use of the material, and the processing is easy.
【図１】本発明に従うスピンドルモータの一実施例を示
す断面図である。FIG. 1 is a sectional view showing an embodiment of a spindle motor according to the present invention.
【図２】図１のスピンドルモータにおけるハブ部材の加
工方法を説明するための説明図である。FIG. 2 is an explanatory diagram for explaining a method of processing a hub member in the spindle motor of FIG. 1;
２ ハウジング ４，４ａ ハブ部材 ６ ブラケット本体 ８ 内円筒壁部 １０ 外円筒壁部 １４ ハブ本体 １８，１８ａ 軸部 ２０ 雌ねじ部 ２２，２２ａ フランジ部 ２４，２４ａ 垂下円筒部 ２６ 球軸受 ２８ ロータマグネット ３０ ステータ ４０ ボス部材2 housing 4, 4 a hub member 6 bracket body 8 the cylindrical wall portion 10 the outer cylindrical wall portion 14 the hub body 18,18a shaft portion 20 internally threaded portion 22,22a flange 24,24a hanging cylindrical portion 26 ball bearing 28 the rotor magnet 30 Stator 40 Boss member
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 21/22,29/00 H02K 5/10 H02K 5/173 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H02K 21 / 22,29 / 00 H02K 5/10 H02K 5/173
Claims (2)
的に回転自在であるハブ部材と、該ブラケットと該ハブ
部材との間に介在された軸受手段と、該ハブ部材に装着
されたロータマグネットと、該ロータマグネットに対向
して該ブラケットに装着されたステータと、を具備する
スピンドルモータにおいて、 該ブラケットは、単一の部品により構成されて、プレー
ト状のブラケット本体と、該ブラケット本体の内周部に
設けられた内円筒壁部と、該ブラケット本体の外周部に
設けられた外円筒壁部とを一体に有し、 該ハブ部材は、単一の部品により構成されて、下方が開
放されたハブ本体と、該ハブ本体の中央部から下方に延
びる軸部と、該ハブ本体の下端部に設けられたフランジ
部と、該フランジ部から下方に延びる垂下円筒部を一体
に有し、 該軸部は該ブラケットの内円筒壁部の内側にて略該ブラ
ケット本体まで延びると共に該内円筒壁部は該軸部の基
部近傍まで延び、該軸部と該内円筒壁部の間に該軸受手
段が介在され、 該ハブ部材の該垂下円筒部は該ブラケットの該外円筒壁
部の内側にて該ブラケット本体近傍まで延び、該外円筒
壁部と協働してエアーシール構造を構成する、ことを特
徴とするスピンドルモータ。1. A bracket, a hub member rotatable relative to the bracket, bearing means interposed between the bracket and the hub member, and a rotor magnet mounted on the hub member. A stator mounted on the bracket opposite to the rotor magnet, wherein the bracket is formed of a single component, and has a plate-shaped bracket body and an inner periphery of the bracket body. a cylindrical wall portion in which is provided on the part, integrally includes an outer cylindrical wall portion provided on an outer peripheral portion of the bracket body, the hub member is constituted by a single part, the lower is opened integral with the hub body, and a shaft portion extending downwardly from the central portion of the hub body, and a flange portion provided on a lower end portion of the hub body, a depending cylindrical portion extending downward from the flange portion was
The shaft portion extends substantially inside the inner cylindrical wall portion of the bracket to the bracket main body, and the inner cylindrical wall portion extends near the base of the shaft portion, and the shaft portion and the inner cylindrical wall portion The hanging cylindrical portion of the hub member extends close to the bracket body inside the outer cylindrical wall of the bracket, and cooperates with the outer cylindrical wall to form an air seal. A spindle motor having a structure.
方法にして、一端が開放されたハブ本体と該ハブ本体の
中央部に設けられた軸部を有するハブ中間体を形成し、
次いでこのハブ中間体に記録ディスクを固定するための
雌ねじ部を形成し、しかる後、該雌ねじ部に着脱自在に
ボス部材を螺合し該ボス部材を保持して該ハブ中間体の
仕上加工を施すことを特徴とするハブ部材の加工方法。2. A method of processing a hub member for mounting a recording disk, wherein a hub intermediate having a hub body having one end opened and a shaft portion provided at a central portion of the hub body is formed.
Next, a female screw portion for fixing the recording disk to the hub intermediate body is formed. Thereafter, a boss member is detachably screwed to the female screw portion, and the hub intermediate member is held to finish the hub intermediate body. A method of processing a hub member, wherein the method is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3044139A JP3054210B2 (en) | 1991-02-16 | 1991-02-16 | Spindle motor and hub member processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3044139A JP3054210B2 (en) | 1991-02-16 | 1991-02-16 | Spindle motor and hub member processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04265652A JPH04265652A (en) | 1992-09-21 |
| JP3054210B2 true JP3054210B2 (en) | 2000-06-19 |
Family
ID=12683307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3044139A Expired - Fee Related JP3054210B2 (en) | 1991-02-16 | 1991-02-16 | Spindle motor and hub member processing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3054210B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3312942B2 (en) * | 1993-02-23 | 2002-08-12 | ミネベア株式会社 | Magnetic disk drive |
| JPH11238298A (en) * | 1998-02-19 | 1999-08-31 | Minebea Co Ltd | Hard disk driving device |
| JPH11238299A (en) * | 1998-02-19 | 1999-08-31 | Minebea Co Ltd | Hard disk driving device |
-
1991
- 1991-02-16 JP JP3044139A patent/JP3054210B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04265652A (en) | 1992-09-21 |
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