JPH0571539A - Oil impregnated sintered bearing - Google Patents
Oil impregnated sintered bearingInfo
- Publication number
- JPH0571539A JPH0571539A JP3090853A JP9085391A JPH0571539A JP H0571539 A JPH0571539 A JP H0571539A JP 3090853 A JP3090853 A JP 3090853A JP 9085391 A JP9085391 A JP 9085391A JP H0571539 A JPH0571539 A JP H0571539A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- oil
- sintered
- impregnated
- impregnated bearing
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
- F16C33/104—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing in a porous body, e.g. oil impregnated sintered sleeve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/02—Sliding-contact bearings
- F16C23/04—Sliding-contact bearings self-adjusting
- F16C23/043—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings
- F16C23/045—Sliding-contact bearings self-adjusting with spherical surfaces, e.g. spherical plain bearings for radial load mainly, e.g. radial spherical plain bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/14—Special methods of manufacture; Running-in
- F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2202/00—Solid materials defined by their properties
- F16C2202/02—Mechanical properties
- F16C2202/10—Porosity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/02—Sliding-contact bearings
- F16C23/04—Sliding-contact bearings self-adjusting
- F16C23/041—Sliding-contact bearings self-adjusting with edge relief
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
- F16C33/741—Sealings of sliding-contact bearings by means of a fluid
- F16C33/743—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap
- F16C33/745—Sealings of sliding-contact bearings by means of a fluid retained in the sealing gap by capillary action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Metallurgy (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、焼結含油軸受に係り、
特に潤滑油の飛散または漏れを防止し軸受の寿命を向上
させたものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintered oil-impregnated bearing,
In particular, the present invention relates to a bearing in which the scattering or leakage of lubricating oil is prevented and the life of the bearing is improved.
【０００２】[0002]
【従来の技術】多孔質状の焼結合金により形成され潤滑
油を含浸させて使用される焼結含油軸受は、無給油で長
時間使用でき、高温での耐久性に優れ、低騒音であるこ
とから、ボールベアリングに替わる各種機器の回転軸の
軸受として期待されている。2. Description of the Related Art Sintered oil-impregnated bearings made of porous sintered alloy and impregnated with lubricating oil can be used for a long time without lubrication, have excellent durability at high temperatures, and have low noise. Therefore, it is expected as a bearing for a rotary shaft of various devices, which replaces a ball bearing.
【０００３】このような焼結含油軸受の一例を図４に示
す。この焼結含油軸受では、多孔質状の焼結合金により
なる軸受本体１０に回転軸１２が支承され、また前記軸
受本体１０の下部にはオイル切りリング１６が設けら
れ、さらに前記軸受本体１０は支持体１８によって支持
されており、これらはハウジング１４内に格納されてい
る。An example of such a sintered oil-impregnated bearing is shown in FIG. In this sintered oil-impregnated bearing, a rotating shaft 12 is supported by a bearing body 10 made of a porous sintered alloy, and an oil cutting ring 16 is provided below the bearing body 10. It is supported by a support 18, which is housed in the housing 14.
【０００４】このように構成された焼結含油軸受を運転
すると、前記回転軸１２の回転に伴うポンプ作用によっ
て、軸受本体１０に形成されている多数の細かい含油孔
（空孔）より吸出された潤滑油と、摩擦熱にもとづく膨
張のために滲み出た潤滑油とが軸受本体１０と回転軸１
２の接触面に油膜を形成して回転軸１２を回転自在に支
持するようになっている。When the sintered oil-impregnated bearing thus constructed is operated, it is sucked out from a large number of fine oil-impregnated holes (holes) formed in the bearing body 10 by the pumping action accompanying the rotation of the rotary shaft 12. The lubricating oil and the lubricating oil that has exuded due to expansion due to frictional heat are the bearing body 10 and the rotating shaft 1.
An oil film is formed on the contact surface of the rotary shaft 12 to rotatably support the rotary shaft 12.
【０００５】しかしながらこのような焼結含油軸受で
は、運転中に滲み出た油が徐々に軸受本体１０の下部に
移動して油漏れを生じてしまい、運転初期の潤滑さが保
たれなくなるという問題があった。However, in such a sintered oil-impregnated bearing, the oil that has exuded during operation gradually moves to the lower part of the bearing body 10 to cause oil leakage, and the lubrication at the beginning of operation cannot be maintained. was there.
【０００６】このような問題を解決するものとして、実
開平２−６５７１４号公報に開示された焼結含油軸受が
ある。As a solution to such a problem, there is a sintered oil-impregnated bearing disclosed in Japanese Utility Model Publication No. 2-65714.
【０００７】このものは、図５に示すように回転軸２０
を支承する焼結多孔質含油軸受２２の両端（軸の長手方
向の両端）に、該含油軸受２２に形成された気孔より大
きな径の気孔を有する多孔質部材２４を当接させてハウ
ジング２３内に圧入したものである。さらに上記公報に
は図６に示すように、含油軸受２２に形成された気孔よ
り大きな径の気孔を有する多孔質部材２４の内径を、前
記含油軸受２２から離隔する方向に大としてテーパ２７
を設けた構造も開示されている。As shown in FIG. 5, this is a rotary shaft 20.
A porous member 24 having pores larger in diameter than the pores formed in the oil-impregnated bearing 22 is brought into contact with both ends (both ends in the longitudinal direction of the shaft) of the sintered porous oil-impregnated bearing 22 supporting the inside of the housing 23. It was pressed into. Further, in the above publication, as shown in FIG. 6, the inner diameter of the porous member 24 having pores larger in diameter than the pores formed in the oil-impregnated bearing 22 is increased in the direction away from the oil-impregnated bearing 22 and is tapered 27.
A structure provided with is also disclosed.
【０００８】このような構成を有する焼結含油軸受によ
れば、運転中に焼結含油軸受２２から浸出した余分な油
２８が外部へ出ようとした場合、この軸受２２端面に当
接する多孔質部材２４が油２８を吸引し、運転停止によ
り温度が下がった時に毛細管力の差によって多孔質部材
２４が吸引した油２８を気孔径の小さい、即ち毛細管力
の大きい焼結含油軸受２２へ戻し、循環させることがで
きる。これによって、再運転の際に油が不足することが
なく、運転初期の潤滑が十分に保たれると共に軸受の寿
命が大幅に向上する。According to the sintered oil-impregnated bearing having such a structure, when the excess oil 28 leached from the sintered oil-impregnated bearing 22 tries to go out during operation, the porous oil-impregnated bearing is in contact with the end surface of the bearing 22. The member 24 sucks the oil 28 and returns the oil 28 sucked by the porous member 24 due to the difference in the capillary force to the sintered oil-impregnated bearing 22 having a small pore diameter, that is, a large capillary force when the temperature is lowered due to the stop of the operation. Can be circulated. As a result, there is no shortage of oil during re-operation, sufficient lubrication is maintained at the beginning of operation, and the life of the bearing is greatly improved.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら前記公報
の焼結含油軸受では、焼結多孔質含油軸受２２と、該含
油軸受２２の気孔より大きな径の気孔を有する多孔質部
材２４とを組み合わせたものであるため、組立に手間が
かかると共に、軸受全体の強度が十分でなく長期にわた
って使用できないという課題があった。さらに前記の焼
結多孔質含油軸受２２と、多孔質部材２４との間に接触
面を有するため、運転停止により温度が下がった時に多
孔質部材２４が吸引した油２８を毛細管力の差によって
焼結含油軸受２２へ戻す効果が不十分になり易いという
不満があった。However, in the sintered oil-impregnated bearing of the above publication, a combination of the sintered porous oil-impregnated bearing 22 and the porous member 24 having pores having a diameter larger than the pores of the oil-impregnated bearing 22 is combined. Therefore, there is a problem that it takes time to assemble and the strength of the entire bearing is not sufficient and the bearing cannot be used for a long time. Further, since there is a contact surface between the sintered porous oil-impregnated bearing 22 and the porous member 24, the oil 28 sucked by the porous member 24 when the temperature drops due to the stop of operation burns due to the difference in capillary force. There has been a complaint that the effect of returning to the oil-impregnated bearing 22 tends to be insufficient.
【００１０】本発明は前記事情に鑑みてなされたもの
で、組立に手間がかからず、長期使用に耐え、かつ油を
軸受本体に戻す効果に優れた焼結含油軸受を提供するこ
とを目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sintered oil-impregnated bearing which is easy to assemble, withstands long-term use, and has an excellent effect of returning oil to the bearing body. And
【００１１】[0011]
【課題を解決するための手段】本発明の焼結含油軸受で
は、軸受本体の軸長手方向の少なくとも一方の端部の気
孔径を他の部分の気孔径より大きくすると共に、前記軸
受本体の軸長手方向の少なくとも一方の端部の内径を軸
長手方向外方に向かうに従って大としてテーパーを設け
たことを課題解決の手段とした。In the sintered oil-impregnated bearing according to the present invention, the pore diameter of at least one end portion of the bearing main body in the axial longitudinal direction is made larger than the pore diameter of the other portion, and the shaft of the bearing main body is made larger. The means for solving the problem is to provide a taper by increasing the inner diameter of at least one end portion in the longitudinal direction toward the outer side in the axial longitudinal direction.
【００１２】[0012]
【作用】多孔質状の焼結合金により形成された軸受本体
において、軸受本体の軸長手方向の少なくとも一方の端
部の気孔径を、他の部分の気孔径より大きくすると、運
転時に軸受端部に吸引された油が毛細管力により他部
に、途中で損失することなく効果的に戻されると共に、
軸受本体が一体的に構成されているため軸受本体の強度
が劣化しない。In the bearing body formed of the porous sintered alloy, if the pore diameter of at least one end portion in the axial direction of the bearing body is made larger than the pore diameter of the other portion, the bearing end portion during operation The oil sucked in is effectively returned to other parts by capillary force without loss on the way,
Since the bearing body is integrally formed, the strength of the bearing body does not deteriorate.
【００１３】また、軸長手方向の少なくとも一方の端部
の内径を軸長手方向外方に向かうに従って大とすると、
油が効果的に軸受の端部に吸引される。If the inner diameter of at least one end portion in the longitudinal direction of the shaft is increased toward the outer side in the longitudinal direction of the shaft,
Oil is effectively sucked into the end of the bearing.
【００１４】[0014]
【実施例】以下、図面を参照して本発明の焼結含油軸受
について詳しく説明する。図１は本発明の焼結含油軸受
の第１実施例を示す断面図である。この焼結含油軸受
は、図１に示すような形状の多孔質状焼結合金からなる
軸受本体１に回転軸２が支承されたもので、前記軸受本
体１は大径の外径を有する本体部３と、小径の外径を有
しかつ軸長手方向端部に向かうに従って内径が大となる
テーパ５を有しているテーパ部４とからなっている。テ
ーパ部４におけるテーパ５の長さは、軸受全体の長さに
対して約３０％、テーパ角度は１．５゜に設定されてい
る。また、前記本体部３には、径が約２０〜１００μｍ
の気孔を多数有しており、テーパ部４には、径が約１０
０〜２００μｍの気孔を多数有している。The sintered oil-impregnated bearing of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of the sintered oil-impregnated bearing of the present invention. In this sintered oil-impregnated bearing, a rotating shaft 2 is supported by a bearing body 1 made of a porous sintered alloy having a shape as shown in FIG. 1, and the bearing body 1 has a large outer diameter. It comprises a portion 3 and a tapered portion 4 having a small outer diameter and a taper 5 having an inner diameter increasing toward the end in the axial direction. The length of the taper 5 in the taper portion 4 is set to about 30% of the entire length of the bearing, and the taper angle is set to 1.5 °. Further, the main body 3 has a diameter of about 20 to 100 μm.
Has a large number of pores, and the tapered portion 4 has a diameter of about 10
It has a large number of pores of 0 to 200 μm.
【００１５】この焼結含油軸受では、テーパ部４に形成
された気孔径が本体部３に形成された気孔径より大きく
設定されているため、運転時にテーパ部４により吸引さ
れた油６が毛細管力により本体部３に、途中で損失する
ことなく効果的に戻される。In this sintered oil-impregnated bearing, the pore diameter formed in the taper portion 4 is set to be larger than the pore diameter formed in the main body portion 3, so that the oil 6 sucked by the taper portion 4 during operation is capillary. The force effectively returns it to the body 3 without any loss in the middle.
【００１６】またこの焼結含油軸受では、軸受本体が一
体的に構成されているため、組立が容易であり長時間運
転しても軸受本体の強度が劣化しない。Further, in this sintered oil-impregnated bearing, since the bearing main body is integrally formed, the assembly is easy, and the strength of the bearing main body does not deteriorate even after long-term operation.
【００１７】図２に本発明の焼結含油軸受の第２実施例
を示す。このものが第１実施例の焼結含油軸受と異なる
点は、軸長手方向上方にもテーパ５を有するテーパ部４
を設けた点である。FIG. 2 shows a second embodiment of the sintered oil-impregnated bearing of the present invention. This is different from the sintered oil-impregnated bearing of the first embodiment in that the tapered portion 4 having the taper 5 also in the axial longitudinal direction upper direction.
This is the point where
【００１８】この焼結含油軸受によっても、第一実施例
と同様の作用効果を奏し、さらに軸長手方向上部に油５
が移動した場合でも本体３に、途中で損失することなく
効果的に油６を戻すことができる。This sintered oil-impregnated bearing also has the same effects as those of the first embodiment, and the oil 5 is further provided on the upper portion in the longitudinal direction of the shaft.
Even if is moved, the oil 6 can be effectively returned to the main body 3 without being lost on the way.
【００１９】（製造例）図１に示した焼結含油軸受の製
造方法を図３（ａ）ないし（ｄ）に沿って説明する。(Manufacturing Example) A method for manufacturing the sintered oil-impregnated bearing shown in FIG. 1 will be described with reference to FIGS. 3 (a) to 3 (d).
【００２０】まず、粉末を図３（ａ）に示すような形に
成形し、次いで７００〜７５０℃で焼結を行い図３
（ｂ）に示すような焼結体とする。さらに矯正用型を用
いて焼結体の下面Ａのみの矯正を行い、図示したような
形状でテーパ部の気孔径のサイズが約１００〜２００μ
ｍになるように形成した。First, the powder is molded into a shape as shown in FIG. 3 (a) and then sintered at 700 to 750 ° C.
The sintered body is as shown in (b). Further, only the lower surface A of the sintered body is straightened using a straightening die, and the pore diameter of the tapered portion is approximately 100 to 200 μm in the shape shown in the figure.
It was formed so as to be m.
【００２１】ここで、気孔径のサイズは、原料粉の大き
さ、矯正代の量をコントロールすることによって容易に
制御できた。Here, the size of the pore diameter could be easily controlled by controlling the size of the raw material powder and the amount of the straightening allowance.
【００２２】さらに、矯正用型を用いて下記の矯正条件
で焼結体の上部Ｂのみの矯正を行って、Ｂの部分の焼結
体の面を６０μｍ縮小すると共に気孔径のサイズを２０
〜１００μｍになるようにコントロールした。Further, only the upper part B of the sintered body is straightened by using a straightening die under the following straightening conditions to reduce the surface of the sintered body in the portion B by 60 μm and the pore diameter size to 20.
It was controlled so as to be -100 μm.
【００２３】その後、さらに洗浄、乾燥、真空浸油等を
行うことにより図１に示す焼結含油軸受を製造した。After that, the sintered oil-impregnated bearing shown in FIG. 1 was manufactured by further washing, drying, and vacuum oiling.
【００２４】（実験例）図１に示した第１実施例の焼結
含油軸受と、図４に示した従来の焼結含油軸受とを用い
て潤滑油の消費量を比較した。なお潤滑油の消費量は以
下の測定条件によって比較した。 軸回転数 １８００ＲＰＭ 雰囲気温度 ６０℃ 測定時間 ３０００時間(Experimental example) The consumption of lubricating oil was compared between the sintered oil-impregnated bearing of the first embodiment shown in FIG. 1 and the conventional sintered oil-impregnated bearing shown in FIG. The consumption of lubricating oil was compared under the following measurement conditions. Shaft speed 1800 RPM Ambient temperature 60 ° C Measurement time 3000 hours
【００２５】この結果、従来の焼結含油軸受の潤滑油の
消費量が０．０１５mg/cm2/Hrであったのに対し、実施
例の焼結含油軸受の潤滑油の消費量は０．００９mg/cm2
/Hrとなり、従来例の軸受の潤滑油の消費量と比較して
４０％減少することが判明した。As a result, the lubricating oil consumption of the conventional sintered oil-impregnated bearing was 0.015 mg / cm 2 / Hr, while the lubricating oil consumption of the sintered oil-impregnated bearing of the embodiment was 0. 009 mg / cm 2
It became / Hr, and it was found that the amount of lubricating oil consumed by the conventional bearing was reduced by 40%.
【００２６】[0026]
【発明の効果】以上説明したように本発明の焼結含油軸
受では、軸受本体の軸長手方向の少なくとも一方の端部
の気孔径を、他の部分の気孔径より大きく設定されてい
るため、運転時に軸受端部から吸引された油が毛細管力
により他部に、途中で損失することなく効果的に戻され
る。As described above, in the sintered oil-impregnated bearing of the present invention, the pore diameter of at least one end in the axial direction of the bearing main body is set to be larger than the pore diameters of the other portions. The oil sucked from the end of the bearing during operation is effectively returned to the other part by the capillary force without being lost on the way.
【００２７】従って本発明の焼結含油軸受によれば、油
を軸受本体に戻す効果に優れた焼結含油軸受を提供する
ことができる。Therefore, according to the sintered oil-impregnated bearing of the present invention, a sintered oil-impregnated bearing having an excellent effect of returning oil to the bearing body can be provided.
【００２８】また本発明の焼結含油軸受では、軸受本体
が一体的に構成されているため、組立が容易であると共
に長時間運転しても軸受本体の強度が劣化しない。Further, in the sintered oil-impregnated bearing of the present invention, since the bearing main body is integrally formed, the assembly is easy and the strength of the bearing main body does not deteriorate even after long-term operation.
【００２９】従って本発明の焼結含油軸受によれば、製
造が容易で軸受本体の寿命に優れた軸受を提供できる。Therefore, according to the sintered oil-impregnated bearing of the present invention, it is possible to provide a bearing which is easy to manufacture and has a long life of the bearing body.
【００３０】また本発明の焼結含油軸受において、軸長
手方向の少なくとも一方の端部の内径を軸長手方向外方
に向かうに従って大とすることにより、油を効果的に軸
受の端部に吸引することができる。In the sintered oil-impregnated bearing of the present invention, the oil is effectively sucked to the end of the bearing by increasing the inner diameter of at least one end in the longitudinal direction of the shaft toward the outer side in the axial direction. can do.
【図１】本発明の焼結含油軸受の第一実施例を示す断面
図である。FIG. 1 is a sectional view showing a first embodiment of a sintered oil-impregnated bearing of the present invention.
【図２】同軸受の第二実施例を示す断面図である。FIG. 2 is a sectional view showing a second embodiment of the bearing.
【図３】第一実施例の軸受の製造工程を示す工程図であ
る。FIG. 3 is a process drawing showing the manufacturing process of the bearing of the first embodiment.
【図４】従来の焼結含油軸受を示す断面図である。FIG. 4 is a sectional view showing a conventional sintered oil-impregnated bearing.
【図５】他の従来例の焼結含油軸受を示す断面図であ
る。FIG. 5 is a cross-sectional view showing another conventional sintered oil-impregnated bearing.
【図６】図５に示す焼結含油軸受の一部変形例を示す断
面図である。6 is a sectional view showing a partially modified example of the sintered oil-impregnated bearing shown in FIG.
１ 軸受本体 ２ 回転軸 ３ 本体部 ４ テーパ部 ５ テーパ 1 Bearing body 2 Rotating shaft 3 Body part 4 Tapered part 5 Tapered
Claims (1)
受本体に、回転軸が挿通される軸受孔が形成された焼結
含油軸受において、前記軸受本体の軸長手方向の少なく
とも一方の端部の気孔径を他の部分の気孔径より大きく
すると共に、前記軸受本体の軸長手方向の少なくとも一
方の端部の内径を軸長手方向外方に向かうに従って大と
したことを特徴とする焼結含油軸受。1. A sintered oil-impregnated bearing in which a bearing hole, into which a rotary shaft is inserted, is formed in a bearing body made of a porous sintered alloy, and at least one end of the bearing body in the axial longitudinal direction. Sintering, characterized in that the pore diameter of one portion is made larger than the pore diameter of the other portion, and the inner diameter of at least one end portion of the bearing main body in the axial longitudinal direction is increased as it goes outward in the axial longitudinal direction. Oil-impregnated bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3090853A JPH0571539A (en) | 1991-04-22 | 1991-04-22 | Oil impregnated sintered bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3090853A JPH0571539A (en) | 1991-04-22 | 1991-04-22 | Oil impregnated sintered bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0571539A true JPH0571539A (en) | 1993-03-23 |
Family
ID=14010134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3090853A Pending JPH0571539A (en) | 1991-04-22 | 1991-04-22 | Oil impregnated sintered bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0571539A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899572A (en) * | 1996-04-10 | 1999-05-04 | Johnson Electric S.A. | Bearing assembly for a miniature motor |
| JP2001082469A (en) * | 1999-09-10 | 2001-03-27 | Nippon Thompson Co Ltd | Linear motion rolling guide unit |
| NL1014457C2 (en) * | 1999-02-24 | 2001-06-06 | Ntn Toyo Bearing Co Ltd | Sintered oil bearing and method of manufacturing it and spindle motor for information equipment. |
| WO2002057641A1 (en) * | 2001-01-18 | 2002-07-25 | Robert Bosch Gmbh | Plain bearing |
| US6511225B2 (en) * | 2000-05-23 | 2003-01-28 | Robert Bosch Gmbh | Calibrated sliding bearing bushing and calibrating tool for producing the sliding bearing bushing |
| US6942388B2 (en) * | 2002-05-24 | 2005-09-13 | Hon Hai Precision Ind. Co., Ltd. | Bearing structure |
| DE102004012757A1 (en) * | 2004-03-15 | 2005-10-06 | Robert Bosch Gmbh | bearings |
| KR100813920B1 (en) * | 2006-05-18 | 2008-03-18 | 삼성전기주식회사 | Vibrational motor and oiless bearing |
| US8360648B2 (en) * | 2003-04-02 | 2013-01-29 | Diamet Corporation | Oil-impregnated sintered bearing and method of producing the same |
-
1991
- 1991-04-22 JP JP3090853A patent/JPH0571539A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899572A (en) * | 1996-04-10 | 1999-05-04 | Johnson Electric S.A. | Bearing assembly for a miniature motor |
| NL1014457C2 (en) * | 1999-02-24 | 2001-06-06 | Ntn Toyo Bearing Co Ltd | Sintered oil bearing and method of manufacturing it and spindle motor for information equipment. |
| JP2001082469A (en) * | 1999-09-10 | 2001-03-27 | Nippon Thompson Co Ltd | Linear motion rolling guide unit |
| US6511225B2 (en) * | 2000-05-23 | 2003-01-28 | Robert Bosch Gmbh | Calibrated sliding bearing bushing and calibrating tool for producing the sliding bearing bushing |
| WO2002057641A1 (en) * | 2001-01-18 | 2002-07-25 | Robert Bosch Gmbh | Plain bearing |
| US6942388B2 (en) * | 2002-05-24 | 2005-09-13 | Hon Hai Precision Ind. Co., Ltd. | Bearing structure |
| US8360648B2 (en) * | 2003-04-02 | 2013-01-29 | Diamet Corporation | Oil-impregnated sintered bearing and method of producing the same |
| US8726515B2 (en) | 2003-04-02 | 2014-05-20 | Diamet Corporation | Oil-impregnated sintered bearing and method of producing the same |
| DE102004012757A1 (en) * | 2004-03-15 | 2005-10-06 | Robert Bosch Gmbh | bearings |
| KR100813920B1 (en) * | 2006-05-18 | 2008-03-18 | 삼성전기주식회사 | Vibrational motor and oiless bearing |
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