JPS62107159U - - Google Patents
Info
- Publication number
- JPS62107159U JPS62107159U JP19917685U JP19917685U JPS62107159U JP S62107159 U JPS62107159 U JP S62107159U JP 19917685 U JP19917685 U JP 19917685U JP 19917685 U JP19917685 U JP 19917685U JP S62107159 U JPS62107159 U JP S62107159U
- Authority
- JP
- Japan
- Prior art keywords
- plastic magnet
- peripheral surface
- bracket
- rotor shaft
- outer peripheral
- 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
- 230000002093 peripheral effect Effects 0.000 claims 4
- 239000011553 magnetic fluid Substances 0.000 claims 3
- 239000000696 magnetic material Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 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
３図は第２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、９，１３……スペーサ、１１……プラスチ
ツクマグネツト、１２……磁気デスク、１４……
クランプ、１５……ネジ。
Fig. 1 is a cross-sectional view of the main parts near the bearing of a motor for a magnetic desk in which the present invention has been implemented, Fig. 2 is a cross-sectional view of a conventional motor for driving a magnetic desk, and Fig. 3 is a sectional view of the bearing shown in Fig. 2. It is a sectional view of the main part in the vicinity. 1...Rotor yoke, 2...Permanent magnet, 3...
Stator core, 4...Stator winding, 5...Bracket, 6...Rotor shaft, 7...Bearing, 8...Rotor hub, 9, 13...Spacer, 11...Plastic magnet , 12...magnetic desk, 14...
Clamp, 15...screw.
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配置したその内径が前記回
転子軸の外径より僅かに大きい回転子軸側のみを
部分的にＮ，Ｓに着磁したプラスチツクマグネツ
トと、このプラスチツクマグネツトと回転子軸の
外周面間に介挿された磁性材料の微粉末を含む磁
性流体とより成り、前記プラスチツクマグネツト
はその外周面が前記軸受に近い位置で、前記ブラ
ケツトにより支持され、この結果前記ブラケツト
に対向する回転子ハブ部分の厚さを大きく取り得
るようにしたことを特徴とする磁性流体シール装
置。 (2) 前記プラスチツクマグネツトが断面乙状に
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。[Claims for Utility Model Registration] (1) The rotor shaft is rotatably supported by a cylindrical bracket via a bearing, and its inner diameter is arranged in a space between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the bracket. A plastic magnet is partially magnetized to N and S on the rotor shaft side, which is slightly larger than the outer diameter of the child shaft, and a magnetic material is inserted between the plastic magnet and the outer peripheral surface of the rotor shaft. The plastic magnet is made of a magnetic fluid containing fine powder, and the outer peripheral surface of the plastic magnet is supported by the bracket at a position close to the bearing, and as a result, the thickness of the rotor hub portion facing the bracket can be increased. A magnetic fluid seal device characterized by: (2) The magnetic fluid sealing device according to claim 1, wherein the plastic magnet has an O-shaped cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19917685U JPS62107159U (en) | 1985-12-26 | 1985-12-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19917685U JPS62107159U (en) | 1985-12-26 | 1985-12-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62107159U true JPS62107159U (en) | 1987-07-08 |
Family
ID=31160554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19917685U Pending JPS62107159U (en) | 1985-12-26 | 1985-12-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62107159U (en) |
-
1985
- 1985-12-26 JP JP19917685U patent/JPS62107159U/ja active Pending