JPH01146776U - - Google Patents
Info
- Publication number
- JPH01146776U JPH01146776U JP3619988U JP3619988U JPH01146776U JP H01146776 U JPH01146776 U JP H01146776U JP 3619988 U JP3619988 U JP 3619988U JP 3619988 U JP3619988 U JP 3619988U JP H01146776 U JPH01146776 U JP H01146776U
- Authority
- JP
- Japan
- Prior art keywords
- hub
- bearing
- back yoke
- peripheral surface
- fixed shaft
- 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.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims 3
- 239000010959 steel Substances 0.000 claims 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 2
- 239000002184 metal Substances 0.000 claims 2
- 230000008602 contraction Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Motor Or Generator Frames (AREA)
Description
第１図は本考案の２つの実施例を合わせて示す
断面図である。
１……ハブ、２……バツクヨーク、３……マグ
ネツト、４……固定軸、６……ステータコア、７
……一端、８……外鍔部、９……他端、１０……
第１軸受、１１……内鍔部、１２……一端、１３
ａ……内端部、１４……内周面、１７……微小空
隙部、１８……相互自由伸縮部、１９……補助リ
ング、２０ａ……外端部、２１……第２軸受、２
２……他端、Ｈ……バツクヨークの高さ、ｈ……
嵌合部の軸心方向寸法。
FIG. 1 is a cross-sectional view showing two embodiments of the present invention. 1...Hub, 2...Back yoke, 3...Magnet, 4...Fixed shaft, 6...Stator core, 7
...One end, 8...Outer flange, 9...Other end, 10...
First bearing, 11... Inner flange, 12... One end, 13
a... Inner end, 14... Inner peripheral surface, 17... Microgap, 18... Mutual free expansion and contraction part, 19... Auxiliary ring, 20a... Outer end, 21... Second bearing, 2
2...Other end, H...Height of back yoke, h...
Axial dimension of the mating part.
Claims (1)
バツクヨーク２及び永久マグネツト３を設けると
共に、固定軸４に設けたステータコア６を該ハブ
１が包囲するインハブ型のスピンドルモータに於
て、 該ハブ１を非鉄金属製とすると共に、一端７に
磁気デイスクを受止める外鍔部８を、他端９に第
１軸受１０を嵌着する内鍔部１１を、夫々備えた
帽子型に形成し、 該ハブ１の他端９の内鍔部１１を、上記第１軸
受１０を介して鋼鉄製の上記固定軸４の一端１２
に枢着し、 かつ、鋼鉄製のバツクヨーク２の外周面内端部
１３ａのみを、上記ハブ１の内周面１４の上記内
鍔部１１寄りに嵌合固着させると共に、該バツク
ヨーク２の高さＨの７０％〜９０％と上記ハブ１
の内周面１４との間に微小空隙部１７又は相互自
由伸縮部１８を形成し、 さらに、該バツクヨーク２の内周面外端部２０
ａに非鉄金属の補助リング１９を介装して、又は
直接に、第２軸受２１を嵌着し、該第２軸受２１
を介して、上記ハブ１の上記一端７を鋼鉄製の上
記固定軸４の他端２２に枢着したことを、 特徴とするスピンドルモータ。[Claims for Utility Model Registration] An in-hub type spindle motor in which a cylindrical back yoke 2 and a permanent magnet 3 are provided inside a hub 1 on which a magnetic disk is mounted, and the hub 1 surrounds a stator core 6 provided on a fixed shaft 4. The hub 1 is made of non-ferrous metal, and has an outer flange 8 for receiving a magnetic disk at one end 7 and an inner flange 11 for fitting a first bearing 10 at the other end 9. The inner flange 11 of the other end 9 of the hub 1 is connected to the one end 12 of the fixed shaft 4 made of steel via the first bearing 10.
At the same time, only the inner end 13a of the outer peripheral surface of the back yoke 2 made of steel is fitted and fixed to the inner peripheral surface 14 of the hub 1 near the inner flange 11, and the height of the back yoke 2 is 70% to 90% of H and the above hub 1
A microgap 17 or a mutually freely extensible portion 18 is formed between the inner peripheral surface 14 of the back yoke 2, and an outer end 20 of the inner peripheral surface of the back yoke 2.
The second bearing 21 is fitted to the second bearing 21 with a non-ferrous metal auxiliary ring 19 interposed or directly fitted to the second bearing 21.
A spindle motor characterized in that the one end 7 of the hub 1 is pivotally connected to the other end 22 of the fixed shaft 4 made of steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3619988U JPH0724936Y2 (en) | 1988-03-17 | 1988-03-17 | Spindle motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3619988U JPH0724936Y2 (en) | 1988-03-17 | 1988-03-17 | Spindle motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01146776U true JPH01146776U (en) | 1989-10-11 |
| JPH0724936Y2 JPH0724936Y2 (en) | 1995-06-05 |
Family
ID=31262816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3619988U Expired - Lifetime JPH0724936Y2 (en) | 1988-03-17 | 1988-03-17 | Spindle motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724936Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652358U (en) * | 1992-12-24 | 1994-07-15 | 長野日本電産株式会社 | Spindle motor |
-
1988
- 1988-03-17 JP JP3619988U patent/JPH0724936Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0652358U (en) * | 1992-12-24 | 1994-07-15 | 長野日本電産株式会社 | Spindle motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0724936Y2 (en) | 1995-06-05 |
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