JPH01107053U - - Google Patents
Info
- Publication number
- JPH01107053U JPH01107053U JP72588U JP72588U JPH01107053U JP H01107053 U JPH01107053 U JP H01107053U JP 72588 U JP72588 U JP 72588U JP 72588 U JP72588 U JP 72588U JP H01107053 U JPH01107053 U JP H01107053U
- Authority
- JP
- Japan
- Prior art keywords
- spindle motor
- rotor
- rotor yoke
- stator core
- yoke
- 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
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の一実施例を示す断面図、第２
図は第１図の実施例のＡ部の拡大断面図、第３図
は従来の磁気デイスク装置のスピンドルモータの
一例を示す断面図、第４図は第３図の例のＢ部の
拡大断面図である。
２…ステータ、３，１３…ロータヨーク、４，
１４…マグネツト、５…シヤフト、６，７…ボー
ルベアリング、８…ハウジング、９…スピンドル
ハブ、１０…磁気デイスク、１１…ヨーク延伸部
。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an enlarged sectional view of part A of the embodiment shown in Fig. 1, Fig. 3 is a sectional view showing an example of a spindle motor of a conventional magnetic disk device, and Fig. 4 is an enlarged sectional view of part B of the example of Fig. 3. It is a diagram. 2... Stator, 3, 13... Rotor yoke, 4,
14... Magnet, 5... Shaft, 6, 7... Ball bearing, 8... Housing, 9... Spindle hub, 10... Magnetic disk, 11... Yoke extension part.
Claims (1)
クの外壁部の内側に設けられた複数個の円弧状の
永久磁石とを有するロータと、前記ロータヨーク
の底部の中央にその末端を固定された軸と、前記
軸の上部および下部にその内輪を装着された２個
のボールベアリングと、前記ボールベアリングの
外輪を支持するハウジングと、前記ハウジングの
下部外周の前記永久磁石に対応する位置に固定し
て設けられて複数個の磁極を有するステータコア
およびこのステータコアに巻回したコイルとを備
えるステータとを具備する磁気デイスク装置のス
ピンドルモータにおいて、 前記ロータヨークの外壁部の上面に固着され、
前記ステータコアの外径よりも小さな内径を有す
る円環状のヨーク延伸部を備えることを特徴とす
る磁気デイスク装置のスピンドルモータ。[Claims for Utility Model Registration] A rotor having a cylindrical rotor yoke with a bottom and a plurality of arc-shaped permanent magnets provided inside the outer wall of the rotor yoke, and a rotor having an end thereof located at the center of the bottom of the rotor yoke. a shaft to which is fixed, two ball bearings whose inner rings are mounted on the upper and lower parts of the shaft, a housing that supports the outer ring of the ball bearing, and a permanent magnet on the lower outer periphery of the housing. In a spindle motor for a magnetic disk device, the spindle motor includes a stator core provided in a fixed position and having a plurality of magnetic poles, and a stator having a coil wound around the stator core, the spindle motor being fixed to the upper surface of the outer wall of the rotor yoke;
A spindle motor for a magnetic disk device, comprising an annular yoke extension having an inner diameter smaller than an outer diameter of the stator core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP72588U JPH01107053U (en) | 1988-01-06 | 1988-01-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP72588U JPH01107053U (en) | 1988-01-06 | 1988-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01107053U true JPH01107053U (en) | 1989-07-19 |
Family
ID=31200006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP72588U Pending JPH01107053U (en) | 1988-01-06 | 1988-01-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01107053U (en) |
-
1988
- 1988-01-06 JP JP72588U patent/JPH01107053U/ja active Pending
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