JPS62107157U - - Google Patents
Info
- Publication number
- JPS62107157U JPS62107157U JP19917485U JP19917485U JPS62107157U JP S62107157 U JPS62107157 U JP S62107157U JP 19917485 U JP19917485 U JP 19917485U JP 19917485 U JP19917485 U JP 19917485U JP S62107157 U JPS62107157 U JP S62107157U
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical portion
- outer diameter
- magnetic
- flange
- magnetic fluid
- 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 6
- 239000000696 magnetic material Substances 0.000 claims 3
- 238000007789 sealing Methods 0.000 claims 3
- 239000000843 powder Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
第１図は本考案を実施した磁気デスク用電動機
の軸受付近の要部断面図、第２図は本考案の磁気
シールド板の各種の形状説明図、第３図は本考案
の他の実施例を示す要部断面図、第４図は従来よ
り実施されている磁気デスク駆動用電動機の断面
図、第５図は第４図の軸受付近の要部断面図であ
る。
１……回転子ヨーク、２……永久磁石、３……
固定子鉄芯、４……固定子巻線、５……ブラケツ
ト、６……回転子軸、７……軸受、８……回転子
ハブ、９，１０……ヨーク、１１……永久磁石、
１２……磁気デスク、１３……スペーサ、１４…
…クランプ、１５……固定用ネジ、１６……シー
ルド板、１６―１……円筒部、１６―２，１６―
３……鍔状部。
Fig. 1 is a cross-sectional view of the main parts near the bearing of a magnetic desk motor in which the present invention is implemented, Fig. 2 is an explanatory diagram of various shapes of the magnetic shield plate of the present invention, and Fig. 3 is another embodiment of the present invention. FIG. 4 is a cross-sectional view of a conventional magnetic disk drive electric motor, and FIG. 5 is a cross-sectional view of a main part near the bearing shown in FIG. 4. 1...Rotor yoke, 2...Permanent magnet, 3...
Stator core, 4... Stator winding, 5... Bracket, 6... Rotor shaft, 7... Bearing, 8... Rotor hub, 9, 10... Yoke, 11... Permanent magnet,
12... Magnetic desk, 13... Spacer, 14...
... Clamp, 15 ... Fixing screw, 16 ... Shield plate, 16-1 ... Cylindrical part, 16-2, 16-
3...flange.
Claims (1)
在に支承された回転子軸の外周面と上記ブラケツ
トの内周面間の空間において、前記ブラケツトの
内周面に取り付けたその内径が前記回転子軸の外
径より僅かに大きい磁性材料の２個の円板状ヨー
クと、このヨークの間に挟持した永久磁石と、前
記２個の円板状ヨークと回転子軸の外周面間に介
挿された磁性材料の微粉末を含む磁性流体と、前
記ブラケツトの外周に配設した磁性材料の磁気シ
ールド板とより成ることを特徴とする磁性流体シ
ール装置。 (2) 前記磁気シールド板が円筒状に形成されて
いることを特徴とする実用新案登録請求の範囲第
１項に記載の磁性流体シール装置。 (3) 前記磁気シールド板が円筒状の部分と、該
円筒部の一方の端面に備えたその外径が前記円筒
部の外径と略等しい鍔状部とを有することを特徴
とする実用新案登録請求の範囲第１項に記載の磁
性流体シール装置。 (4) 前記磁気シールド板が円筒状の部分と、該
円筒部の一方の端面に備えたその内径が上記円筒
部の外径に略等しい鍔状部とを有することを特徴
とする実用新案登録請求の範囲第１項に記載の磁
性流体シール装置。 (5) 前記磁気シールド板が円筒状の部分と、円
筒部の一方の端面に備えたその内径が上記円筒部
の外径に略等しい鍔状部と、他の端面に備えたそ
の外径が前記円筒部の外径に略等しい鍔状部とを
有することを特徴とする実用新案登録請求の範囲
第１項に記載の磁性流体シール装置。[Claims for Utility Model Registration] (1) In the space between the outer circumferential surface of a rotor shaft rotatably supported by a cylindrical bracket via a bearing and the inner circumferential surface of the bracket, the inner circumferential surface of the bracket two disk-shaped yokes made of magnetic material whose inner diameter is slightly larger than the outer diameter of the rotor shaft; a permanent magnet sandwiched between these yokes; A magnetic fluid sealing device comprising: a magnetic fluid containing fine powder of a magnetic material interposed between the outer circumferential surfaces of a child shaft; and a magnetic shield plate made of a magnetic material disposed around the outer circumference of the bracket. (2) The magnetic fluid sealing device according to claim 1, wherein the magnetic shield plate is formed in a cylindrical shape. (3) A utility model characterized in that the magnetic shielding plate has a cylindrical portion and a flange-like portion provided on one end surface of the cylindrical portion and whose outer diameter is approximately equal to the outer diameter of the cylindrical portion. A magnetic fluid sealing device according to claim 1. (4) Registration of a utility model characterized in that the magnetic shield plate has a cylindrical portion and a flange-like portion provided on one end surface of the cylindrical portion and whose inner diameter is approximately equal to the outer diameter of the cylindrical portion. A magnetic fluid seal device according to claim 1. (5) The magnetic shielding plate has a cylindrical portion, a flange portion provided on one end surface of the cylindrical portion, the inner diameter of which is approximately equal to the outer diameter of the cylindrical portion, and a flange portion provided on the other end surface, the outer diameter of which is approximately equal to the outer diameter of the cylindrical portion. The magnetic fluid seal device according to claim 1, which is a registered utility model, and further includes a flange-like portion having an outer diameter substantially equal to the outer diameter of the cylindrical portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19917485U JPS62107157U (en) | 1985-12-26 | 1985-12-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19917485U JPS62107157U (en) | 1985-12-26 | 1985-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62107157U true JPS62107157U (en) | 1987-07-08 |
Family
ID=31160551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19917485U Pending JPS62107157U (en) | 1985-12-26 | 1985-12-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62107157U (en) |
-
1985
- 1985-12-26 JP JP19917485U patent/JPS62107157U/ja active Pending
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