JPH0241652U - - Google Patents
Info
- Publication number
- JPH0241652U JPH0241652U JP11816588U JP11816588U JPH0241652U JP H0241652 U JPH0241652 U JP H0241652U JP 11816588 U JP11816588 U JP 11816588U JP 11816588 U JP11816588 U JP 11816588U JP H0241652 U JPH0241652 U JP H0241652U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- retaining ring
- spindle motor
- fluid retaining
- motor according
- 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
- 239000011553 magnetic fluid Substances 0.000 claims description 12
- 239000000696 magnetic material Substances 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000005452 bending Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000007747 plating Methods 0.000 claims 1
- 238000007740 vapor deposition Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
Description
第１図は本考案の一実施例を示す要部拡大断面
図、第２図と第３図は寸法関係説明図、第４図〜
第７図は夫々別の実施例の要部拡大図である。
１……軸部、２……ハブ、８……磁性流体シー
ル、１２……磁性流体保持輪、１６……最外面、
１７……外端縁部、１９……傾斜状小凹溝。
Fig. 1 is an enlarged cross-sectional view of main parts showing one embodiment of the present invention, Figs. 2 and 3 are explanatory diagrams of dimensional relationships, and Figs.
FIG. 7 is an enlarged view of main parts of different embodiments. 1... Shaft portion, 2... Hub, 8... Magnetic fluid seal, 12... Magnetic fluid retaining ring, 16... Outermost surface,
17...outer edge, 19...slanted small groove.
Claims (1)
該軸部１の外周面の内で磁性流体シール８に対応
する部分に、磁性材の薄肉状の磁性流体保持輪１
２を被覆したスピンドルモータ。 ２ メツキによつて磁性流体保持輪１２を形成し
た実用新案登録請求の範囲第１項記載のスピンド
ルモータ。 ３ 金属蒸着によつて磁性流体保持輪１２を形成
した実用新案登録請求の範囲第１項記載のスピン
ドルモータ。 ４ 帯状片を曲げて軸部１の外周面の一部に巻設
して磁性流体保持輪１２を形成した実用新案登録
請求の範囲第１項記載のスピンドルモータ。 ５ 磁性流体シール８の最外面１６よりも軸心方
向の内方へ僅かに位置をずらせて、又は、該最外
面１６と軸心方向に同一位置として、磁性流体保
持輪１２の外端縁部１７を配設した実用新案登録
請求の範囲第１項記載のスピンドルモータ。 ６ 磁性流体１１を軸部１の回転により非飛散方
向へ誘引する傾斜状小凹溝１９…を、磁性流体保
持輪１２の表面に形成した実用新案登録請求の範
囲第１項記載のスピンドルモータ。[Claims for Utility Model Registration] 1. The shaft portion 1 is formed of a non-magnetic material, and
A thin magnetic fluid retaining ring 1 made of magnetic material is provided on the outer peripheral surface of the shaft portion 1 at a portion corresponding to the magnetic fluid seal 8.
2 coated spindle motor. 2. The spindle motor according to claim 1, in which the magnetic fluid retaining ring 12 is formed by plating. 3. The spindle motor according to claim 1, in which the magnetic fluid retaining ring 12 is formed by metal vapor deposition. 4. The spindle motor according to claim 1, wherein the magnetic fluid retaining ring 12 is formed by bending a band-shaped piece and winding it around a part of the outer peripheral surface of the shaft portion 1. 5 The outer end edge of the magnetic fluid retaining ring 12 is slightly shifted inward in the axial direction from the outermost surface 16 of the magnetic fluid seal 8, or at the same position as the outermost surface 16 in the axial direction. 17. A spindle motor according to claim 1 of the utility model registration claim. 6. The spindle motor according to claim 1, in which the magnetic fluid retaining ring 12 has small inclined grooves 19 formed on the surface of the magnetic fluid retaining ring 12 to attract the magnetic fluid 11 in a non-scattering direction by the rotation of the shaft portion 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11816588U JPH0241652U (en) | 1988-09-07 | 1988-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11816588U JPH0241652U (en) | 1988-09-07 | 1988-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0241652U true JPH0241652U (en) | 1990-03-22 |
Family
ID=31362283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11816588U Pending JPH0241652U (en) | 1988-09-07 | 1988-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241652U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0394053U (en) * | 1990-01-10 | 1991-09-25 | ||
| JPH05211735A (en) * | 1992-01-30 | 1993-08-20 | Nippon Densan Corp | Spindle motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5736761B2 (en) * | 1977-02-14 | 1982-08-05 |
-
1988
- 1988-09-07 JP JP11816588U patent/JPH0241652U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5736761B2 (en) * | 1977-02-14 | 1982-08-05 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0394053U (en) * | 1990-01-10 | 1991-09-25 | ||
| JPH05211735A (en) * | 1992-01-30 | 1993-08-20 | Nippon Densan Corp | Spindle motor |
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