JP2976631B2 - Bearing device - Google Patents
Bearing deviceInfo
- Publication number
- JP2976631B2 JP2976631B2 JP3270739A JP27073991A JP2976631B2 JP 2976631 B2 JP2976631 B2 JP 2976631B2 JP 3270739 A JP3270739 A JP 3270739A JP 27073991 A JP27073991 A JP 27073991A JP 2976631 B2 JP2976631 B2 JP 2976631B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- bearing device
- rotor shaft
- bearing
- groove
- 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.)
- Expired - Fee Related
Links
Landscapes
- Sliding-Contact Bearings (AREA)
- Motor Or Generator Frames (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明はオーディオ,OA機器,
産業機器などに使用される電動機の含油軸受内面にテー
パ付き三角形状溝を備えた軸受装置に関する。The present invention relates to audio, OA equipment,
The present invention relates to a bearing device provided with a tapered triangular groove on an inner surface of an oil-impregnated bearing of a motor used for industrial equipment and the like.
【0002】[0002]
【従来の技術】近年、含油軸受はロータ軸が中心でしゅ
う動する中心性特性が求めれている。2. Description of the Related Art In recent years, oil-impregnated bearings have been required to have centrality characteristics in which a rotor shaft slides at the center.
【0003】以下に従来の流体軸受仕様の軸受装置につ
いて説明する。図5は従来の流体軸受仕様の軸受装置の
断面図を示すものである。図5に示すように、軸受装置
におけるハウジング12内の軸13の外面には、エッチ
ングもしくは転造加工等でグループ形状という流体の集
中部分の平行溝14が形成されている。[0003] A conventional bearing device of a hydrodynamic bearing specification will be described below. FIG. 5 shows a sectional view of a conventional bearing device of a fluid bearing specification. As shown in FIG. 5, on the outer surface of the shaft 13 in the housing 12 of the bearing device, a parallel groove 14 of a fluid concentration portion having a group shape is formed by etching or rolling.
【0004】以上のように構成された軸受装置につい
て、以下その動作について説明する。まず、ハウジング
12と軸13との間には流体(磁性流体も含む)が満た
されている。モータが回転すると回転に伴い平行溝14
に添って上下からのスライスの交点部分に流体の集中が
発生し軸13を中心に向ける効果を持っている。The operation of the bearing device configured as described above will be described below. First, the space between the housing 12 and the shaft 13 is filled with a fluid (including a magnetic fluid). When the motor rotates, the parallel grooves 14
The concentration of the fluid occurs at the intersection of the slices from above and below, which has the effect of turning the axis 13 toward the center.
【0005】[0005]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、軸外面へのグループ加工が困難である。
また、ハウジング−軸間には隙間なく流体が常に満たさ
れていなければならないので、漏れを防止するための流
体シールが必要となり、構造が複雑になる。さらにこの
流体シールのシール効果が寿命を決定付けるという問題
点を有していた。However, in the above-mentioned conventional configuration, it is difficult to perform group machining on the outer surface of the shaft.
In addition, since the fluid must always be filled between the housing and the shaft without any gap, a fluid seal for preventing leakage is required, and the structure becomes complicated. Further, there is another problem that the sealing effect of the fluid seal determines the service life.
【0006】本発明は上記従来の問題点を解決するもの
で、軸受効果を十分発揮できる軸受装置を提供すること
を目的とする。An object of the present invention is to solve the above-mentioned conventional problems and to provide a bearing device which can sufficiently exert a bearing effect.
【0007】[0007]
【課題を解決するための手段】この目的を達成するため
に本発明の軸受装置は、含油軸受内面のロータ軸との回
転接触部に軸回転方向に対応して油溜り部が形成できる
ように回転方向にテーパ状に三角形状溝を配備し、閉じ
角から開き角方向に非空孔部、次に有空孔部を形成し、
両空孔部にまたがって非空孔部から有空孔部に向けて径
が拡がるテーパ状の溝を備えるものであり、また三角形
状溝は軸方向に非空孔部から有空孔部に向かって広がり
の開き角を持ち、そのテーパ角は1/50以下で最大深
さ10μm以下で構成したものであり、また非空孔部を
微小空孔としたものである。 In order to achieve this object, a bearing device according to the present invention is provided with a mechanism for rotating an inner surface of an oil-impregnated bearing with a rotor shaft.
An oil sump can be formed in the rolling contact part corresponding to the shaft rotation direction.
Deploy a triangular groove in a tapered shape in the rotation direction so that
Open from the corner and form a non-voided part in the direction of the corner, then a vacant part,
The diameter extends from the non-porous portion to the
Has a tapered groove that expands, and also has a triangular shape.
Groove extends axially from non-porous to vacant
And the taper angle is 1/50 or less and the maximum depth
With a thickness of 10 μm or less.
These are microvoids.
【0008】[0008]
【作用】この構成において、ロータ軸の回転による含油
軸受のポンプ潤滑効果で軸受内面に差圧が発生し、圧
縮,減圧により発生した油を三角形状溝からテーパの狭
部へ送り込むことによって、前記ロータ軸と前記含油軸
受内面にクサビ状に油膜が形成され前記ロータ軸と前記
含油軸受間に油膜の強度が保たれて回転を円滑にし、か
つ前記ロータ軸を中心に向けることが可能となる。In this construction, a differential pressure is generated on the inner surface of the bearing due to the pump lubrication effect of the oil-impregnated bearing due to the rotation of the rotor shaft, and the oil generated by the compression and decompression is sent from the triangular groove to the narrow portion of the taper, whereby A wedge-shaped oil film is formed on the rotor shaft and the inner surface of the oil-impregnated bearing, so that the strength of the oil film is maintained between the rotor shaft and the oil-impregnated bearing, so that the rotation is smooth and the rotor shaft can be directed toward the center.
【0009】[0009]
【実施例】以下本発明の一実施例について、図面を参照
しながら説明する。An embodiment of the present invention will be described below with reference to the drawings.
【0010】図1に示すように、ロータ軸1を軸支する
含油軸受2はハウジング3に挿入されている。ロータ軸
1に固定されたロータ4にはロータマグネット5が取り
付けられ、ハウジング3には巻線コイル6が取り付けら
れている。含油軸受2にはテーパ付き三角形状溝7と空
孔8を有する。ロータ軸1は含油軸受2の内面△×でし
ゅう動する。図2に示すように、含油軸受2の内面のロ
ータ軸1がしゅう動する部分の周辺をサイジング等の圧
延および塑性加工によって無空孔または微小空孔を有す
る非空孔部9を設け、有空孔部10にまたがって三角形
状溝7を形成させている。三角形状溝7は図3に示すよ
うに、ロータ軸1の回転方向により必要な三角形状とし
ている。図3(a)は左回転用の形状で回転方向端にス
トレートな三角形状であり、同様に図3(b)は右回
転、図3(c)は両回転用の形状である。また、三角形
状溝7の形状はテーパ角1/50以下、溝深さ10μm
以下としてる。As shown in FIG. 1, an oil-impregnated bearing 2 that supports a rotor shaft 1 is inserted into a housing 3. A rotor magnet 5 is attached to the rotor 4 fixed to the rotor shaft 1, and a winding coil 6 is attached to the housing 3. The oil-impregnated bearing 2 has a tapered triangular groove 7 and a hole 8. The rotor shaft 1 slides on the inner surface △ x of the oil-impregnated bearing 2. As shown in FIG. 2, a non-porous portion 9 having no pores or minute pores is provided by rolling and plastic working such as sizing around the portion where the rotor shaft 1 slides on the inner surface of the oil-impregnated bearing 2. The triangular groove 7 is formed over the hole 10. As shown in FIG. 3, the triangular groove 7 has a required triangular shape depending on the rotation direction of the rotor shaft 1. FIG. 3A shows a shape for left rotation and a straight triangle at the end in the rotation direction. Similarly, FIG. 3B shows a shape for right rotation and FIG. 3C shows a shape for both rotations. The triangular groove 7 has a taper angle of 1/50 or less and a groove depth of 10 μm.
It is as follows.
【0011】以上のように構成された軸受装置につい
て、図4を用いてその動作を説明する。まず、ロータ軸
1が回転することによって加圧部分ができ、他方で減圧
部が起こり含油軸受2内部に点線矢印の如くロータ軸1
方向に油が析出し、その油がロータ軸1の回転によるし
ゅう動抵抗によって三角形状溝7にそってロータ軸1と
含油軸受2のしゅう動部分にクサビ状に油膜11が形成
し、ロータ軸1の浮上効果と円滑しゅう動効果をつくり
出している。また、非空孔部9は油膜11を形成する上
での油膜強度に対する加圧効果をアップさせるものであ
り、三角形状溝7の深さをテーパ形状にすることによっ
て、含油軸受2のポンプ潤滑機能をスラスト方向に発揮
させる。もしテーパ形状でない場合は加圧時に空孔8か
ら油逃げが発生したり、油膜11が維持されず金属潤滑
となったりして、ロス抵抗が大きくなり特性的にも寿命
的にも多大の影響がある。さらに、含油軸受2の内面回
転方向にできた多数の油膜11による流体潤滑で回転振
れ防止の効果が得られ、ロータ軸1が中心でしゅう動す
る中心性効果をもたらしている。The operation of the bearing device configured as described above will be described with reference to FIG. First, when the rotor shaft 1 rotates, a pressurized portion is formed, and on the other hand, a decompression portion occurs, and the rotor shaft 1 is inserted inside the oil-impregnated bearing 2 as indicated by a dotted arrow.
The oil precipitates in the direction, and the oil is formed in a wedge-like oil film 11 on the sliding portion of the rotor shaft 1 and the oil-impregnated bearing 2 along the triangular groove 7 due to the sliding resistance due to the rotation of the rotor shaft 1. It creates a floating effect and a smooth sliding effect. The non-hollow portions 9 increase the pressurizing effect on the oil film strength in forming the oil film 11, and the triangular groove 7 is formed into a tapered shape so that the lubricating bearing 2 can be pump-lubricated. Exercise the function in the thrust direction. If it is not tapered, oil escapes from the holes 8 during pressurization, or the metal film is lubricated because the oil film 11 is not maintained, resulting in a large loss resistance and a great effect on characteristics and life. There is. Further, the effect of preventing rotation runout is obtained by fluid lubrication by a large number of oil films 11 formed in the direction of rotation of the inner surface of the oil-impregnated bearing 2, and a centrality effect in which the rotor shaft 1 slides at the center is provided.
【0012】以上のように本実施例によれば、含油軸受
2の内面のロータ軸1のしゅう動周辺に設けた非空孔部
9と、他端の有空孔部10にまたがって三角形状溝7を
設けることにより、三角形状溝7にそってロータ軸1と
含油軸受2のしゅう動部分に油膜11を形成するので、
ロータ軸1の浮上効果,円滑しゅう動効果,回転振れ防
止効果よって、ロータ軸1の中心がしゅう動する中心性
効果をもたらしている。なお、三角形状溝7の形状につ
いては、テーパ角1/50以上で溝深さ10μmを超え
るものについては、油切れ等が発生し金属接触を起こす
可能性がある。また、含油軸受2内面のロータ軸1との
しゅう動部の非空孔部9周辺を微小有空孔部とした含油
軸受2も有効である。As described above, according to the present embodiment, a triangular shape is formed across the non-hollow portion 9 provided around the sliding of the rotor shaft 1 on the inner surface of the oil-impregnated bearing 2 and the hollow portion 10 at the other end. By providing the groove 7, the oil film 11 is formed on the sliding portion of the rotor shaft 1 and the oil-impregnated bearing 2 along the triangular groove 7,
The centering effect that the center of the rotor shaft 1 slides is provided by the floating effect, smooth sliding effect, and rotational runout prevention effect of the rotor shaft 1. In addition, as for the shape of the triangular groove 7, when the taper angle is 1/50 or more and the groove depth exceeds 10 μm, oil shortage or the like may occur and metal contact may occur. Further, the oil-impregnated bearing 2 in which the periphery of the non-hollow portion 9 of the sliding portion with the rotor shaft 1 on the inner surface of the oil-impregnated bearing 2 has a minute hole portion is also effective.
【0013】[0013]
【発明の効果】以上の実施例の説明より明らかなように
本発明は、含油軸受内面のロータ軸のしゅう動部周辺の
非空孔部と他端の有空孔部にまたがって三角形状溝を形
成させることにより、前記ロータ軸と前記含油軸受のし
ゅう動部分に油膜が形成され、前記ロータ軸の中心でし
ゅう動する中心性効果をもたらす優れた軸受装置を実現
できるものである。As is apparent from the above description of the embodiment, the present invention provides a triangular groove extending over a non-hollow portion around the sliding portion of the rotor shaft on the inner surface of the oil-impregnated bearing and a hollow portion at the other end. Thus, an oil film is formed on the rotor shaft and the sliding portion of the oil-impregnated bearing, thereby realizing an excellent bearing device having a centrality effect of sliding at the center of the rotor shaft.
【図1】(a)は本発明の第1の実施例における軸受装
置の断面図 (b)は同軸受装置の含油軸受の断面図 (c)は同軸受装置の含油軸受の断面展開図1A is a sectional view of a bearing device according to a first embodiment of the present invention, FIG. 1B is a sectional view of an oil-impregnated bearing of the bearing device, and FIG.
【図2】同軸受装置の含油軸受内面拡大断面図FIG. 2 is an enlarged sectional view of the inner surface of an oil-impregnated bearing of the bearing device.
【図3】(a)は同軸受装置の三角形状溝の平面図 (b)は同軸受装置の三角形状溝の平面図 (c)は同軸受装置の三角形状溝の平面図3A is a plan view of a triangular groove of the bearing device. FIG. 3B is a plan view of a triangular groove of the bearing device. FIG. 3C is a plan view of a triangular groove of the bearing device.
【図4】 (a)は同軸受装置の含油軸受しゅう動部内径部分の説
明図 (b)は同軸受装置の含油軸受しゅう動部断面詳細を示
す横断面説明図 FIG. 4 (a) is a view of an inner diameter portion of a sliding portion of an oil-impregnated bearing of the bearing device.
Figure (b) is an explanatory cross-sectional view showing details of the sliding portion of the oil-impregnated bearing of the bearing device .
【図5】従来の軸受装置の断面図FIG. 5 is a sectional view of a conventional bearing device.
1 ロータ軸 2 含油軸受 7 三角形状溝 9 非空孔部 10 有空孔部 DESCRIPTION OF SYMBOLS 1 Rotor shaft 2 Oil-impregnated bearing 7 Triangular groove 9 Non-vacancy 10 Void
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) H02K 5/167 F16C 33/10 F16C 17/00 - 17/24 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) H02K 5/167 F16C 33/10 F16C 17/00-17/24
Claims (3)
触する含油軸受から成る軸受装置であって、含油軸受内
面のロータ軸との回転接触部に軸回転方向に対応して油
溜り部が形成できるように回転方向にテーパ状に三角形
状溝を配備し、閉じ角から開き角方向に非空孔部、次に
有空孔部を形成し、両空孔部にまたがって非空孔部から
有空孔部に向けて径が拡がるテーパ状の溝を備えた軸受
装置。1. A bearing device comprising an oil-impregnated bearing which is in rotational contact with a rotor shaft via lubricating oil on an inner surface thereof, wherein oil is provided at a rotational contact portion of the inner surface of the oil-impregnated bearing with the rotor shaft in correspondence with the shaft rotation direction.
Triangle tapered in the direction of rotation so that a pool can be formed
A groove is provided, and a non-void portion is formed in the direction from the closing angle to the opening angle, and then
Form a hole with holes, and extend from both non-holes to both holes.
A bearing device having a tapered groove whose diameter increases toward a vacant hole .
孔部に向かって広がりの開き角を持ち、そのテーパ角は
1/50以下で最大深さ10μm以下で構成した請求項
1記載の軸受装置。2. The triangular groove has an opening angle that widens in the axial direction from a non-porous portion toward a vacant portion, and has a taper angle of 1/50 or less and a maximum depth of 10 μm or less. 2. The bearing device according to 1.
は請求項2記載の軸受装置。3. The bearing device according to claim 1, wherein the non-void portion is a minute hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3270739A JP2976631B2 (en) | 1991-10-18 | 1991-10-18 | Bearing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3270739A JP2976631B2 (en) | 1991-10-18 | 1991-10-18 | Bearing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05111209A JPH05111209A (en) | 1993-04-30 |
JP2976631B2 true JP2976631B2 (en) | 1999-11-10 |
Family
ID=17490301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3270739A Expired - Fee Related JP2976631B2 (en) | 1991-10-18 | 1991-10-18 | Bearing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2976631B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3599886B2 (en) * | 1996-03-08 | 2004-12-08 | 日立粉末冶金株式会社 | Hydrodynamic thrust porous bearing |
CN211701672U (en) * | 2019-04-09 | 2020-10-16 | 博泽沃尔兹堡汽车零部件有限公司 | Electric motor and motor housing for an electric motor |
-
1991
- 1991-10-18 JP JP3270739A patent/JP2976631B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH05111209A (en) | 1993-04-30 |
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