JP3464051B2 - Manufacturing method of sintered oil-impregnated bearing - Google Patents

Manufacturing method of sintered oil-impregnated bearing

Info

Publication number
JP3464051B2
JP3464051B2 JP20545794A JP20545794A JP3464051B2 JP 3464051 B2 JP3464051 B2 JP 3464051B2 JP 20545794 A JP20545794 A JP 20545794A JP 20545794 A JP20545794 A JP 20545794A JP 3464051 B2 JP3464051 B2 JP 3464051B2
Authority
JP
Japan
Prior art keywords
inner diameter
outer diameter
recess
impregnated bearing
oil
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
Application number
JP20545794A
Other languages
Japanese (ja)
Other versions
JPH0868423A (en
Inventor
夏比古 森
卓嗣 古林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NTN Corp filed Critical NTN Corp
Priority to JP20545794A priority Critical patent/JP3464051B2/en
Publication of JPH0868423A publication Critical patent/JPH0868423A/en
Application granted granted Critical
Publication of JP3464051B2 publication Critical patent/JP3464051B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
    • 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
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/028—Sliding-contact bearings for exclusively rotary movement for radial load only with fixed wedges to generate hydrodynamic pressure, e.g. multi-lobe 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
    • F16C33/103—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sliding-Contact Bearings (AREA)

Description

【発明の詳細な説明】 【０００１】 【産業上の利用分野】この発明は、焼結含油軸受に関
し、主として、レーザビームプリンタやデジタルコピー
等に用いられるスキャナモータ等のスピンドルの軸受に
用いられる焼結含油軸受及びその製造方法に関するもの
である。 【０００２】 【従来の技術及び発明が解決しようとする課題】レーザ
ビームプリンタやデジタルコピー等に用いられるスキャ
ナモータは、最近、高速化、小型化の傾向にあり、例え
ばレーザビームプリンタでは毎分一万回転を超える回転
数となる。また、低コスト化の要望も強く、例えば転が
り軸受に比べて安価な焼結含油軸受の適用が検討されて
いる。 【０００３】しかし、このような高速で回転する回転軸
の軸受として、内径の形状が真円である通常の焼結含油
軸受を用いると、レーザビームプリンタでは軸姿勢が通
常縦向きなので、一般にホワールと呼ばれる振れ回り現
象が特に発生しやすく、安定した回転精度が得られな
い。 【０００４】軸姿勢が横向きであれば、真円の焼結含油
軸受であっても、ロータの自重がラジアル荷重として加
わり、軸受の中心に対して軸の中心が偏心してくさび膜
効果による圧力が発生し軸は安定して回転する。 【０００５】しかし、軸姿勢が縦向きでラジアル荷重が
加わらないような場合では、軸が軸受に対して偏心せ
ず、したがって、くさび膜が形成されないので、圧力
（軸を支持する力）が発生せず、安定した回転精度が得
られない。 【０００６】このため、現在では、転がり軸受（ミニア
チュアボールベアリング）や高価なヘリングボーン型等
の動圧溝を有する回転軸が使われている。 【０００７】そこで、この発明は転がり軸受やヘリング
ボーン型等の動圧軸受に比べて安価な焼結含油軸受を用
いた場合に、軽負荷高速回転時におけるホワール等の不
安定現象を来さないようにすること、及びそのような焼
結含油軸受の製造方法を提供することを目的とする。 【０００８】 【課題を解決するための手段とその作用】上記の目的を
達成するために、この発明は、含油焼結材により円筒形
に形成された焼結含油軸受において、その内周面の仮想
内径面を基準とし、これより外側に存在する凹部と、内
側に存在する凸部とをそれぞれ３箇所以上周方向に連続
的に形成した構成としたものである。 【０００９】なお、上記の凹部及び凸部を円弧で形成す
る場合及び凹部をＶ形、凸部を逆Ｖ形に形成する場合も
ある。 【００１０】上記構成の焼結含油軸受は、これに軸を挿
通すると、軸受内径面の連結した凹凸部により軸外径面
との間に広い間隙と狭い間隙が周方向に連続的に生じ
る。このため、軸と軸受とが相対回転すると、狭い間隙
の部分で動圧が発生し、軸を支持する。 【００１１】次に、焼結含油軸受の製造方法に関する発
明は、含油焼結材を筒形の一次形状に圧縮成形する際
に、その外径面に３箇所以上の外径凹部を形成すると共
に、その内径面に上記各外径凹部と同じ半径上の位置に
内径凹部を形成し、半径上で対向する内径凹部の両端と
外径凹部の両端とは同じ中心角θ 1 上にあり、また内径
凹部相互間の面と外径凹部相互間の面の各両端は中心角
θ 2 上にあるように形成し、上記一次形状の圧縮成形品
をサイジング又はハウジングに圧入し、その際の圧力に
より、各内径凹部相互間の仮想内径部分を内側へ圧縮変
形させ、その圧縮変形部分により上記内径凹部と連続
し、かつ仮想内径より内側に存在する内径凸部を有する
製品形状に仕上げるようにしたものである。 【００１２】 【実施例】図１及び図２に示した第１実施例の焼結含油
軸受は、含油焼結材により外径面１を真円形に形成し、
内径面２に凹部３及び凸部４を周方向に連続形成したも
のである。上記の凹部３及び凸部４は、外径面と同芯状
態の仮想内径面５を基準として形成される。即ち、凹部
３は仮想内径面５より外側に存在する円弧で形成され、
その円弧の両端は仮想内径面５に達している。即ち凹部
３は仮想内径面５より内側に中心を有し、かつその仮想
内径面５の半径Ｒより小さい曲率半径Ｒ1 を有する。 【００１３】また、凸部４は、仮想内径面５より内側に
存在する円弧に形成され、その円弧の両端は、前記の凹
部３の円弧の両端と滑らかに連続している。即ち凸部４
は仮想内径５より外側に中心を有する曲率半径Ｒ0 を有
する。 【００１４】凹部３と凸部４は以上のごとき形状である
から、結局両者は仮想内径面５を基準として、その外側
の内側に円弧面が波形に連続した凹凸面を形成する。 【００１５】第１実施例の焼結含油軸受は以上のごとき
ものであり、図２に示すように、その内径面に軸６を挿
入し、相対的な回転（矢印ａ参照）を生じさせると、焼
結含油軸受から滲出した油（矢印ｂ参照）が、凹部３の
部分の広い間隙の部分から凸部４の狭い間隙の部分に移
動し、動圧を発生させる。 【００１６】図３に示した第２実施例は、凹部３が仮想
内径面５よりも外側に存在し、かつその両端が仮想内径
面５に達するＶ形に形成される。また、凸部４は、上記
仮想内径面５より内側に存在し、上記凹部３のＶ形の両
端に連続した逆Ｖ形をなし、全体として仮想内径面５を
基準として、その外側及び内側にＶ形面が波形に連続し
た凹凸面を形成する。 【００１７】この場合も軸との間で動圧が発生すること
は、前述の第１の実施例と同様である。 【００１８】なお、上記の第１実施例では、凹部３と凸
部４を各４箇所設け、第２実施例では各６箇所設けた例
を示しているが、これらは少なくとも３箇所設けるだけ
でもよい。 【００１９】次に、上記第１実施例の焼結含油軸受の製
造方法の実施例を説明する。図４は、含油焼結材を圧縮
成形した場合の一次形状を示す。即ち、外径面１の等分
位置の４箇所に浅い円弧状の外径凹部７を形成し、ま
た、内径面２に上記外径凹部７と同じ半径上の位置に浅
い円弧状の内径凹部８を形成する。半径上で対向する内
径凹部８の両端と、外径凹部７の両端とは、同じ中心角
θ1 上にあり、また内径凹部８相互間の面と外径凹部７
相互間の面の各両端は中心角θ2 上にある。 【００２０】上記のごとき一次形状に圧縮成形した中間
品を、図５に示すようにハウジング９（又はサイジン
グ）に圧入すると、外径凹部７相互間の圧入面１０がハ
ウジング９から半径方向の力（白抜き矢印参照）を受
け、内径面側に力を及ぼす。この力により内径凹部８相
互間の面が内側に膨出し、凸部１１が生じる。その結
果、仮想内径面５を基準として、その外側、内側に円弧
状の凹部８と凸部１１とが波形に連続した凹凸面が形成
された最終製品形状となる。 【００２１】 【発明の効果】以上のようにこの発明は、内径面に形成
した凹凸曲面により動圧が発生するので、軽負荷高速回
転時のホワール、軸の振れ回り現象を抑制し、安定した
回転精度を保証することができる。 【００２２】また、この発明は内径面に凹凸曲面を有す
る焼結含油軸受を極めて簡単に製作することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sintered oil-impregnated bearing, and more particularly to a sintered oil-impregnated bearing used for a spindle bearing of a scanner motor or the like used for a laser beam printer, digital copying, or the like. The present invention relates to an oil-impregnated bearing and a method for manufacturing the same. 2. Description of the Related Art Scanner motors used in laser beam printers and digital copying machines have recently been tending to be faster and smaller. The number of rotations exceeds 10,000 rotations. In addition, there is a strong demand for cost reduction, and for example, application of a sintered oil-impregnated bearing that is less expensive than a rolling bearing is being studied. [0003] However, if a normal sintered oil-impregnated bearing having an inner diameter of a perfect circle is used as a bearing for a rotating shaft rotating at such a high speed, a laser beam printer generally has a vertical orientation. In particular, a whirling phenomenon referred to as "rolling phenomenon" tends to occur, and stable rotational accuracy cannot be obtained. [0004] If the shaft posture is horizontal, even if it is a perfect circular sintered oil-impregnated bearing, the own weight of the rotor is applied as a radial load, the center of the shaft is eccentric with respect to the center of the bearing, and the pressure due to the wedge film effect is reduced. The generated shaft rotates stably. However, in the case where the shaft posture is vertical and no radial load is applied, the shaft is not eccentric with respect to the bearing and therefore no wedge film is formed, so that pressure (force for supporting the shaft) is generated. Without this, stable rotation accuracy cannot be obtained. For this reason, a rotating shaft having a dynamic pressure groove such as a rolling bearing (miniature ball bearing) or an expensive herringbone type is now used. Therefore, the present invention does not cause instability such as whirl at the time of light-load high-speed rotation when a sintered oil-impregnated bearing that is less expensive than a dynamic bearing such as a rolling bearing or a herringbone type is used. It is an object of the present invention to provide a method for producing such a sintered oil-impregnated bearing. [0008] In order to achieve the above object, the present invention relates to a sintered oil-impregnated bearing formed of an oil-impregnated sintered material into a cylindrical shape. Based on the virtual inner diameter surface, three or more concave portions present outside and convex portions present inside are formed continuously at three or more locations in the circumferential direction. [0009] Incidentally, the field Go及 Beauty recess of V-shaped to form a concave and convex portion of the arc, also <br/> Ru Ah case of forming the convex portion in the opposite V-shaped. When the shaft is inserted through the sintered oil-impregnated bearing having the above-described structure, a wide gap and a narrow gap are continuously formed in the circumferential direction between the outer diameter surface of the shaft and the concavo-convex portion of the inner diameter surface of the bearing. For this reason, when the shaft and the bearing rotate relative to each other, a dynamic pressure is generated in a narrow gap portion to support the shaft. Next , the invention relating to a method for manufacturing a sintered oil-impregnated bearing is characterized in that when an oil-impregnated sintered material is compression-molded into a cylindrical primary shape, at least three outer diameter recesses are formed on the outer diameter surface thereof. An inner diameter recess is formed on the inner diameter surface at a position on the same radius as each of the outer diameter recesses, and both ends of the inner diameter recess opposite on the radius are formed.
Both ends of the outer diameter recess are on the same central angle θ 1 and
Both ends of the surface between the recesses and the surface between the outer diameter recesses are center angles
formed to overlying theta 2, the compression-molded article of the primary shape and pressed into the sizing or housing, by the pressure at that time, is compressed deforming the virtual inner diameter between the inner diameter recess mutual inward, its compressive deformation The product is finished in a product shape having an inner diameter convex portion which is continuous with the inner diameter concave portion and is present inside the virtual inner diameter by a portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sintered oil-impregnated bearing according to a first embodiment shown in FIGS. 1 and 2 has an outer diameter surface 1 made of an oil-impregnated sintered material into a perfect circle.
A concave portion 3 and a convex portion 4 are formed continuously on the inner diameter surface 2 in the circumferential direction. The concave portion 3 and the convex portion 4 are formed based on a virtual inner diameter surface 5 concentric with the outer diameter surface. That is, the concave portion 3 is formed by an arc existing outside the virtual inner diameter surface 5,
Both ends of the arc reach the virtual inner diameter surface 5. That is, the concave portion 3 has a center inside the virtual inner diameter surface 5 and has a radius of curvature R 1 smaller than the radius R of the virtual inner diameter surface 5. The projection 4 is formed in an arc present inside the virtual inner diameter surface 5, and both ends of the arc are smoothly connected to both ends of the arc of the recess 3. That is, the convex portion 4
Has a radius of curvature R 0 centered outside the virtual inner diameter 5. Since the concave portion 3 and the convex portion 4 have the shapes as described above, the two eventually form an irregular surface in which the arc surface is continuous with the waveform inside the outer side with respect to the virtual inner diameter surface 5. The sintered oil-impregnated bearing according to the first embodiment is as described above. As shown in FIG. 2, when the shaft 6 is inserted into the inner diameter surface of the bearing to cause relative rotation (see arrow a). The oil (see arrow b) oozing out of the sintered oil-impregnated bearing moves from the wide gap portion of the concave portion 3 to the narrow gap portion of the convex portion 4 to generate dynamic pressure. In the second embodiment shown in FIG. 3, the concave portion 3 exists outside the virtual inner diameter surface 5 and both ends thereof are formed in a V-shape reaching the virtual inner diameter surface 5. The convex portion 4 exists inside the virtual inner diameter surface 5 and forms an inverted V shape that is continuous with both ends of the V shape of the concave portion 3. The V-shaped surface forms a concavo-convex surface continuous with a waveform. Also in this case, the generation of dynamic pressure between the shaft and the shaft is the same as in the first embodiment. In the above-described first embodiment, four recesses 3 and four protrusions 4 are provided, and in the second embodiment, six recesses are provided. However, at least three recesses 3 and protrusions 4 are provided. Good. Next, an embodiment of the method of manufacturing the sintered oil-impregnated bearing of the first embodiment will be described. FIG. 4 shows a primary shape when the oil-impregnated sintered material is compression-molded. That is, a shallow arc-shaped outer concave portion 7 is formed at four equally-spaced positions on the outer diameter surface 1, and a shallow arc-shaped inner concave portion is formed on the inner diameter surface 2 at a position on the same radius as the outer diameter concave portion 7. 8 is formed. Both ends of the inner diameter recess 8 and both ends of the outer diameter recess 7 that are radially opposed are on the same central angle θ 1 , and the surface between the inner diameter recesses 8 and the outer diameter recess 7
Both ends of the plane between each other lie on the central angle θ 2 . When the intermediate product compression-molded into the primary shape as described above is press-fitted into the housing 9 (or sizing) as shown in FIG. (Refer to the white arrow) and apply force to the inner diameter side. The surface between the inner diameter concave portions 8 bulges inward due to this force, and the convex portions 11 are formed. As a result, a final product shape is obtained in which the concave and convex portions 8 and the convex portions 11 in a circular arc shape are formed on the outer and inner sides of the virtual inner diameter surface 5 as a reference. [0021] invention Nico as above, according to the present invention, since the dynamic pressure is generated by patterned surface formed on the inner surface, to suppress the light-load high-speed rotation when the whirl phenomenon whirling of the shaft, stable Rotation accuracy can be guaranteed. Further, this invention can be very simply manufactured sintered oil-impregnated bearing having a patterned surface on the inner surface.

【図面の簡単な説明】 【図１】第１実施例の端面図 【図２】同上の使用状態の一部拡大断面図 【図３】第２実施例の端面図 【図４】製造途中の端面図 【図５】製造途中の断面図 【符号の説明】 １ 外径面 ２ 内径面 ３ 凹部 ４ 凸部 ５ 仮想内径面 ６ 軸 ７ 外径凹部 ８ 内径凹部 ９ ハウジング １０ 圧入面 １１ 凸部[Brief description of the drawings] FIG. 1 is an end view of a first embodiment. FIG. 2 is a partially enlarged cross-sectional view of a usage state of the above. FIG. 3 is an end view of a second embodiment. FIG. 4 is an end view during manufacture. FIG. 5 is a cross-sectional view during manufacturing. [Explanation of symbols] 1 outer diameter surface 2 Inner surface 3 recess 4 convex part 5 Virtual inner surface 6 axes 7 Outer diameter recess 8 Internal recess 9 Housing 10 Press-fitting surface 11 convex part

フロントページの続き (56)参考文献 特開 平３−107612（ＪＰ，Ａ) 特開 平６−109020（ＪＰ，Ａ) 特開 平５−115146（ＪＰ，Ａ) 特開 平２−89807（ＪＰ，Ａ) 特開 平５−256318（ＪＰ，Ａ) 実開 平３−86209（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16C 17/00 - 17/26 F16C 33/00 - 33/28 Continuation of front page (56) References JP-A-3-107612 (JP, A) JP-A-6-109020 (JP, A) JP-A-5-115146 (JP, A) JP-A-2-89807 (JP) JP-A-5-256318 (JP, A) JP-A-3-86209 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F16C 17/00-17/26 F16C 33/00-33/28

Claims (1)

(57)【特許請求の範囲】 【請求項１】 含油焼結材を筒形の一次形状に圧縮成形
する際に、その外径面に３箇所以上の外径凹部を形成す
ると共に、その内径面に上記各外径凹部と同じ半径上の
位置に内径凹部を形成し、半径上で対向する内径凹部の
両端と外径凹部の両端とは同じ中心角θ 1 上にあり、ま
た内径凹部相互間の面と外径凹部相互間の面の各両端は
中心角θ 2 上にあるように形成し、上記一次形状の圧縮
成形品をサイジング又はハウジングに圧入し、その際の
圧力により、各内径凹部相互間の内径部分を内側へ圧縮
変形させ、その圧縮変形部分により上記内径凹部と連続
し、かつ仮想内径より内側に存在する内径凸部を有する
製品形状に仕上げることを特徴とする焼結含油軸受の製
造方法。(57) [Claim 1] When an oil-impregnated sintered material is compression-molded into a cylindrical primary shape, three or more outer diameter recesses are formed on the outer diameter surface thereof and the inner diameter thereof is formed. An inner diameter recess is formed on the surface at the same radial position as each outer diameter recess, and the inner diameter
The ends of the two ends and the outer diameter recess located on the same central angle theta 1, or
Both ends of the surface between the inner diameter recesses and the surface between the outer diameter recesses
Central angle θ formed such that on the two, the primary shape of the compression moldings and pressed into sizing or housing, by the pressure at that time, is compressed deforming the inner diameter between the inner diameter recess mutual inward, the compression A method for manufacturing a sintered oil-impregnated bearing, characterized by finishing the product into a product shape having an inner diameter convex portion which is continuous with the inner diameter concave portion and located inside the virtual inner diameter by a deformed portion.
JP20545794A 1994-08-30 1994-08-30 Manufacturing method of sintered oil-impregnated bearing Expired - Fee Related JP3464051B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20545794A JP3464051B2 (en) 1994-08-30 1994-08-30 Manufacturing method of sintered oil-impregnated bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20545794A JP3464051B2 (en) 1994-08-30 1994-08-30 Manufacturing method of sintered oil-impregnated bearing

Publications (2)

Publication Number Publication Date
JPH0868423A JPH0868423A (en) 1996-03-12
JP3464051B2 true JP3464051B2 (en) 2003-11-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP3464051B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220364592A1 (en) * 2020-04-06 2022-11-17 Ihi Corporation Multilobe bearing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19947462C1 (en) * 1999-10-02 2000-10-26 Simon Karl Gmbh & Co Kg Sinter bearing ring for engine and drive transmission has inserted shaft supplied with lubricant via lubricant ridge strutures with helical elongate extending along bearing bore between bearing ring end faces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220364592A1 (en) * 2020-04-06 2022-11-17 Ihi Corporation Multilobe bearing
US12018714B2 (en) * 2020-04-06 2024-06-25 Ihi Corporation Multilobe bearing

Also Published As

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