JPS62167922A - Metal powder sintered bearing, oil impregnated - Google Patents
Metal powder sintered bearing, oil impregnatedInfo
- Publication number
- JPS62167922A JPS62167922A JP734386A JP734386A JPS62167922A JP S62167922 A JPS62167922 A JP S62167922A JP 734386 A JP734386 A JP 734386A JP 734386 A JP734386 A JP 734386A JP S62167922 A JPS62167922 A JP S62167922A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- rotary shaft
- bearing hole
- support portions
- rotating 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title 1
- 239000000843 powder Substances 0.000 title 1
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 8
- 238000000465 moulding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000036772 blood pressure Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
この発明は、焼結含油軸受に係り、特に回転軸との摩擦
係数が低い焼結含油軸受に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sintered oil-impregnated bearing, and particularly to a sintered oil-impregnated bearing that has a low coefficient of friction with a rotating shaft.
焼結合金で形成し、潤滑油を含浸させて使用する焼結含
油軸受は、無給油で長期間使用できることから、各種機
器の回転軸の軸受として広く用いられている。この種の
軸受においては、回転軸が挿通される軸受孔は通常断面
円形をなしているが、回転軸との局部接触を防止するた
めにできるだけ真円に近い断面形状になるように形成さ
れている。Sintered oil-impregnated bearings, which are formed from a sintered alloy and impregnated with lubricating oil, are widely used as bearings for rotating shafts of various devices because they can be used for long periods of time without lubrication. In this type of bearing, the bearing hole through which the rotating shaft is inserted usually has a circular cross-section, but it is formed to have a cross-sectional shape as close to a perfect circle as possible to prevent local contact with the rotating shaft. There is.
しかしながら、従来の焼結含油軸受では、軸受孔の内周
面の貞円度をできるだけ高くしても、多孔質であるため
どうしても回転軸との摩擦係数をあるレベル以下には低
下させることができなかったり、また、高粘度油を用い
るような場合には、やはり摩擦係数が高くなってしまう
という問題があった。However, in conventional sintered oil-impregnated bearings, even if the fidelity of the inner peripheral surface of the bearing hole is made as high as possible, the coefficient of friction with the rotating shaft cannot be lowered below a certain level due to the porous nature of the bearing hole. If there is no oil, or if high viscosity oil is used, there is a problem that the friction coefficient becomes high.
この発明は、回転軸との摩擦係数が極めて低い焼結含油
軸受を提供することを目的とし、斯かる目的を達成する
ために、この発明による焼結含油軸受は、焼結合金によ
り形成された軸受本体に、回転軸が挿通される軸受孔を
形成し、上記軸受孔の内周面に、軸受孔の軸心からの距
離が互いに等しい平面状をなし、上記回転軸の外周面を
支持する少なくとも３面の支持部を、周方向に形成した
ことを特徴とする。An object of the present invention is to provide a sintered oil-impregnated bearing having an extremely low coefficient of friction with a rotating shaft. A bearing hole through which the rotating shaft is inserted is formed in the bearing body, and the inner circumferential surface of the bearing hole has a planar shape with equal distances from the axis of the bearing hole to support the outer circumferential surface of the rotating shaft. It is characterized in that support portions on at least three sides are formed in the circumferential direction.
（作用）
この発明の焼結含油軸受においては、軸受孔に挿通され
た回転軸は少なくとも３面の支持部によってその外周面
を支持されて回転するが、支持部と回転軸との摩擦は極
めて少ない。これは、各支持部が軸受孔の軸心からの距
離が互いに等しい平面状をなしていて、回転軸と各支持
部の接触面積が少なくなっていることがむしろ好１１１
９を与えているものと思われる。(Function) In the sintered oil-impregnated bearing of the present invention, the rotating shaft inserted into the bearing hole rotates with its outer peripheral surface supported by at least three supporting parts, but the friction between the supporting parts and the rotating shaft is extremely low. few. It is preferable that each support part has a planar shape with equal distances from the axis of the bearing hole, and that the contact area between the rotating shaft and each support part is reduced.
It seems that it is giving a value of 9.
（実施例） 以下、この発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図および第２図は、この発明の第１実施例を示すも
ので、図中１はＦｅ −Ｃｕ系の焼結合金により形成さ
れた円筒状の軸受本体である。この軸受本体１の軸孔は
回転軸２が挿通される軸受孔３となっている。そして、
この軸受孔３の内周面にＧよ、軸受孔３の軸心Ｏからの
距離が互いに等しく、回転軸２の半径に略等しい複数（
図では８面）の平面が周方向に形成され、これら複数の
平面が回転軸２の外周面を支持する支持部４．・・・と
なっている。1 and 2 show a first embodiment of the present invention, in which reference numeral 1 denotes a cylindrical bearing body made of Fe--Cu based sintered alloy. The shaft hole of this bearing body 1 serves as a bearing hole 3 into which the rotating shaft 2 is inserted. and,
On the inner circumferential surface of the bearing hole 3, there are a plurality of (
A supporting portion 4.8 (in the figure, 8 planes) are formed in the circumferential direction, and these plurality of planes support the outer circumferential surface of the rotating shaft 2. It is...
しかして、上記構成の軸受は、内部に潤滑油が含浸され
て使用され、回転軸２がその軸受孔３に挿通されて回転
する。このとき、回転軸２は、その外周面が上記複数の
支持部４．・・・で支持されることになるが、回転軸２
の摩擦係数は従来に比し大幅に低下する。これは、支持
部４．・・・が平面状をなしているので、回転軸２と支
持部４．・・・は線接触となって接触面積が著しく低下
することなどに起囚しているものと思われる。Thus, the bearing having the above structure is used with its inside impregnated with lubricating oil, and the rotating shaft 2 is inserted into the bearing hole 3 and rotated. At this time, the rotating shaft 2 has an outer circumferential surface that is connected to the plurality of supporting parts 4. It will be supported by ..., but the rotating shaft 2
The coefficient of friction is significantly lower than before. This is the support part 4. ... have a planar shape, so that the rotating shaft 2 and the support portion 4. This seems to be due to the fact that the contact area becomes a line contact and the contact area decreases significantly.
災鳳１
上記実施例の焼結含油軸受を使用して、粘度の異なる醐
滑油（高粘度油、中粘度油、低粘度油）について、摩擦
係数と血圧の関係を調べた。また、比較のために、中粘
度油を用いて従来の焼結含油軸受と玉軸受に対する摩擦
係数と面圧（玉軸受の場合は荷重）の関係をそれぞれ調
べた。Disaster 1 Using the sintered oil-impregnated bearing of the above example, the relationship between the friction coefficient and blood pressure was investigated for oils with different viscosities (high viscosity oil, medium viscosity oil, low viscosity oil). For comparison, we investigated the relationship between the friction coefficient and surface pressure (load in the case of ball bearings) for conventional sintered oil-impregnated bearings and ball bearings using medium-viscosity oil.
第３図は、上記実験の結果を示すもので、従来の焼結含
油軸受に対して上記実施例の軸受の摩擦係゛数は著しく
低いことがわかる。また、実施例の軸受において潤滑油
の粘度が高くなる程摩擦係数が低下し、特に高粘度油を
用いた場合は、摩擦係数は玉軸受の値（玉軸受に対して
第３図の横軸は荷重（Ｋｙ ）となっている）に近（な
ることが認められる。FIG. 3 shows the results of the above experiment, and it can be seen that the coefficient of friction of the bearing of the above embodiment is significantly lower than that of the conventional sintered oil-impregnated bearing. In addition, in the bearings of the examples, the higher the viscosity of the lubricating oil, the lower the coefficient of friction, and especially when high viscosity oil is used, the coefficient of friction is the value of the ball bearing (the horizontal axis in Figure 3 with respect to the ball bearing). is close to the load (Ky).
ところで、上記実施例においては、軸受孔３の内周面に
８面の支持部４．・・・を形成したが、支持部４．・・
・は３面以上であれば、その数は任意であり、例えば第
４図の如く９面としてもよい。また、第５図に示ずよう
に、任意の支持部４とこの支持部４に隣り合う支持部４
，４との間に凹所５．・・・を形成しても構わない。By the way, in the above embodiment, eight supporting portions 4. are provided on the inner peripheral surface of the bearing hole 3. ... was formed, but the support part 4.・・・
The number of * is arbitrary as long as it is three or more, and for example, it may be nine as shown in FIG. Further, as shown in FIG. 5, an arbitrary support part 4 and a support part 4 adjacent to this support part 4
, 4 and 5. It is okay to form...
なＪ３、上記実施例の焼結含油軸受を製造するに当って
は、
■ 成形金型を軸受の最終形状に合せて作る。J3. In manufacturing the sintered oil-impregnated bearing of the above example, (1) Make a molding die to match the final shape of the bearing.
■ 成形金型は、軸受孔３が断面円形にｔ【るように作
り、焼結後の矯正金型のコアロッドを最終形状に合「て
作る。■ The molding mold is made so that the bearing hole 3 has a circular cross section, and the core rod of the straightening mold after sintering is made to match the final shape.
■ 成形金型ｔよ、軸受孔３が断面円形となり、かつ、
軸受本体１の外周面に軸方向に延びる複数条の溝を形成
するように作り、焼結後の矯正金型を円筒形とし、矯正
時に外周面の溝に肉が逃げるようにして内周面に支持部
４．・・・を形成する。■For the molding die t, the bearing hole 3 has a circular cross section, and
A plurality of grooves extending in the axial direction are formed on the outer circumferential surface of the bearing body 1, and the straightening mold after sintering is made into a cylindrical shape, and the inner circumferential surface is formed so that the material escapes into the grooves on the outer circumferential surface during straightening. Support part 4. ... to form.
などの方法を採ることができる。Methods such as these can be adopted.
〔発明の効果）
以上説明したように、この発明の焼結含油軸受は、軸受
孔の内周面に、軸受孔の軸心からの距離が互いに等しい
平面状の少なくとも３面の支持部を形成し、これら支持
部により回転軸の外周面を支持するようにしたものであ
るから、回転軸と支持部の接触面積が著しく低下するこ
となどに起囚して回転軸の摩擦係数が従来に比し大幅に
低下すると共に、回転軸との馴染み性も擾れる等の効果
を奏する。[Effects of the Invention] As explained above, the sintered oil-impregnated bearing of the present invention has at least three planar support portions formed on the inner peripheral surface of the bearing hole and having equal distances from the axis of the bearing hole. However, since the outer circumferential surface of the rotating shaft is supported by these supporting parts, the contact area between the rotating shaft and the supporting part is significantly reduced, and the friction coefficient of the rotating shaft is lower than before. This has the effect of significantly reducing the amount of friction and also reducing the compatibility with the rotating shaft.
第１図ないし第３図はこの発明の第１実施例を示すもの
で、第１図は平面図、第２図は第１図のＩｒ−Ｉ［矢視
１１ｉ面図、第３図は実験結果を示ずグラフ、また、第
４図および第５図はそれぞれ他の実施例を示す平面図で
ある。
１・・・軸受本体、２・・・回転軸、３・・・軸受孔、
４・・・支持部。1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a view from Ir-I [arrow 11i] in FIG. 1, and FIG. 3 is an experimental Graphs that do not show results, and FIGS. 4 and 5 are plan views showing other examples, respectively. 1...Bearing body, 2...Rotating shaft, 3...Bearing hole,
4...Support part.
Claims (1)
れる軸受孔が形成され、上記軸受孔の内周面には、軸受
孔の軸心からの距離が互いに等しい平面状をなし、上記
回転軸の外周面を支持する少なくとも３面の支持部が周
方向に形成されて成ることを特徴とする焼結含油軸受。A bearing hole through which a rotating shaft is inserted is formed in the bearing body formed of a sintered alloy, and the inner circumferential surface of the bearing hole has a planar shape with equal distances from the axis of the bearing hole. A sintered oil-impregnated bearing characterized in that at least three support portions are formed in the circumferential direction to support the outer peripheral surface of a rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734386A JPS62167922A (en) | 1986-01-17 | 1986-01-17 | Metal powder sintered bearing, oil impregnated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP734386A JPS62167922A (en) | 1986-01-17 | 1986-01-17 | Metal powder sintered bearing, oil impregnated |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62167922A true JPS62167922A (en) | 1987-07-24 |
Family
ID=11663295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP734386A Pending JPS62167922A (en) | 1986-01-17 | 1986-01-17 | Metal powder sintered bearing, oil impregnated |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62167922A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5120091A (en) * | 1989-09-20 | 1992-06-09 | Sankyo Seiki Mfg. Co., Ltd. | Oil impregnated sintered bearing |
| US5129738A (en) * | 1990-01-23 | 1992-07-14 | Sankyo Seiki Mfg. Co., Ltd. | Bearing device |
| US5746516A (en) * | 1995-08-11 | 1998-05-05 | Hitachi Powdered Metals Co., Ltd. | Porous bearing system having internal grooves and electric motor provided with the same |
| US6120188A (en) * | 1997-06-19 | 2000-09-19 | Matsushita Electric Industiral Co., Ltd. | Bearing unit manufacturing method bearing unit and motor using the bearing unit |
| KR100373937B1 (en) * | 1999-12-23 | 2003-02-26 | 삼성전기주식회사 | Apparatus and method of manufacturing sintered bearing |
| US20100003059A1 (en) * | 2008-07-01 | 2010-01-07 | Oki Data Corporation | Bearing member, belt unit, and image forming device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4736739U (en) * | 1971-05-07 | 1972-12-23 |
-
1986
- 1986-01-17 JP JP734386A patent/JPS62167922A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4736739U (en) * | 1971-05-07 | 1972-12-23 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5120091A (en) * | 1989-09-20 | 1992-06-09 | Sankyo Seiki Mfg. Co., Ltd. | Oil impregnated sintered bearing |
| US5129738A (en) * | 1990-01-23 | 1992-07-14 | Sankyo Seiki Mfg. Co., Ltd. | Bearing device |
| US5746516A (en) * | 1995-08-11 | 1998-05-05 | Hitachi Powdered Metals Co., Ltd. | Porous bearing system having internal grooves and electric motor provided with the same |
| US5932946A (en) * | 1995-08-11 | 1999-08-03 | Hitachi Powdered Metals Co., Ltd | Porous bearing system having internal grooves and electric motor provided with the same |
| US6120188A (en) * | 1997-06-19 | 2000-09-19 | Matsushita Electric Industiral Co., Ltd. | Bearing unit manufacturing method bearing unit and motor using the bearing unit |
| KR100373937B1 (en) * | 1999-12-23 | 2003-02-26 | 삼성전기주식회사 | Apparatus and method of manufacturing sintered bearing |
| US20100003059A1 (en) * | 2008-07-01 | 2010-01-07 | Oki Data Corporation | Bearing member, belt unit, and image forming device |
| US8543050B2 (en) * | 2008-07-01 | 2013-09-24 | Oki Data Corporation | Bearing member, belt unit, and image forming device |
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