JPH0673451U - Rolling bearing for high speed rotation - Google Patents
Rolling bearing for high speed rotationInfo
- Publication number
- JPH0673451U JPH0673451U JP015665U JP1566593U JPH0673451U JP H0673451 U JPH0673451 U JP H0673451U JP 015665 U JP015665 U JP 015665U JP 1566593 U JP1566593 U JP 1566593U JP H0673451 U JPH0673451 U JP H0673451U
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- bearing
- hole
- lubrication
- raceway surface
- 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
- 238000005096 rolling process Methods 0.000 title claims description 6
- 230000006698 induction Effects 0.000 claims abstract description 12
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005461 lubrication Methods 0.000 description 22
- 239000010410 layer Substances 0.000 description 10
- 239000000314 lubricant Substances 0.000 description 8
- 238000005255 carburizing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 102220097517 rs876659265 Human genes 0.000 description 1
- 238000005480 shot peening Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
-
- 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
- F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
-
- 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
- F16C2322/00—Apparatus used in shaping articles
- F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
(57)【要約】
【目的】 内輪の製作工程の煩雑化させることなく、軸
受の許容回転数を向上させる。
【構成】 アンダーレース潤滑を行なう内輪（２）の軌
道面（2a）に、圧縮残留応力を有する硬化層（16）を形
成する。この硬化層（16）は、貫通孔（９）及び径方向
通路（10）の形成後に、高周波焼入れを施して形成す
る。
(57) [Summary] [Purpose] To improve the allowable rotational speed of the bearing without complicating the manufacturing process of the inner ring. [Structure] A hardened layer (16) having a compressive residual stress is formed on a raceway surface (2a) of an inner ring (2) under lubricated. The hardened layer (16) is formed by induction hardening after forming the through hole (9) and the radial passage (10).
Description
【０００１】[0001]
本考案は、アンダーレース潤滑等の強制潤滑方式により潤滑・冷却される高速 回転用転がり軸受に関するものである。 The present invention relates to a rolling bearing for high speed rotation which is lubricated and cooled by a forced lubrication method such as underrace lubrication.
【０００２】[0002]
工作機械の主軸等の高速回転軸を支持するための軸受の潤滑方法として、エア オイル潤滑、オイルミスト潤滑、アンダーレース潤滑等の強制潤滑方式がある。 一般に、主軸のDn値が150×104より小さければエアオイル潤滑やオイルミスト潤 滑が用いられ、Dn値がこれより大きければ冷却効果の高いアンダーレース潤滑が 用いられている。Forced lubrication methods such as air-oil lubrication, oil mist lubrication, and underlace lubrication are available as lubrication methods for bearings that support high-speed rotating shafts such as machine tool spindles. In general, air-oil lubrication or oil mist lubrication is used when the Dn value of the spindle is smaller than 150 × 10 4, and underlace lubrication, which has a high cooling effect, is used when the Dn value is larger than this.
【０００３】 上記潤滑方法のうち、アンダーレース潤滑は、図２に示すように、内輪（41） の軌道面下を軸方向に走る貫通孔（42）に潤滑剤を供給して内輪（41）の冷却を 行なう共に、各貫通孔（42）を流れる潤滑剤を径方向通路（43）内に分流させて 軸受内の潤滑を行なうものである。前記貫通孔（42）は内輪（41）の円周方向に 多数形成され、径方向通路（43）は、多数の貫通孔（42）のうち一部の貫通孔（ 42）に設けられている。Among the above-mentioned lubrication methods, the under-race lubrication, as shown in FIG. 2, supplies a lubricant to the through hole (42) running axially below the raceway of the inner ring (41) to supply the inner ring (41). In addition to cooling the bearing, the lubricant flowing through each through hole (42) is shunted into the radial passage (43) to lubricate the inside of the bearing. A large number of the through holes (42) are formed in the circumferential direction of the inner ring (41), and the radial passages (43) are provided in some of the through holes (42). .
【０００４】[0004]
通常、内・外輪等の軸受部品はSUJ2等の軸受鋼で製作されるが、このような軸 受鋼で製作された軸受では、Dn値が200×104程度に達すると、遠心力により内輪 に過大な引張りフープ応力が作用し、内輪が径方向に大きく膨張する。Normally, bearing parts such as inner and outer rings are made of bearing steel such as SUJ2.However, when a bearing made of such bearing steel reaches a Dn value of about 200 × 10 4 , the inner ring is driven by centrifugal force. Excessive tensile hoop stress acts on the inner ring, causing the inner ring to expand greatly in the radial direction.
【０００５】 このような不具合を防止するには、内輪を浸炭鋼で製作し、これに浸炭処理を 施せばよいと考えられる。しかし、一般に浸炭処理を施すと、母材の表層にスケ ール（酸化層）が形成される。従って、図２に示す内輪（41）に浸炭処理を施し た場合には、貫通孔（42）や径方向通路（43）内に形成されるスケールによって 孔寸法が減少し、場合によっては目詰まりを起こして潤滑不良を起こすおそれが ある。一方、このような不具合を回避するには、浸炭処理前に貫通孔（42）や径 方向通路（43）内に防浸炭加工を施したり、あるいは、浸炭処理後に両孔（42） （43）内のスケールを除去すればよいが貫通孔（42）や径方向通路（43）は多数 形成されているため、これらの作業は極めて煩雑になる。In order to prevent such a problem, it is considered that the inner ring is made of carburized steel and carburized. However, in general, when carburizing is performed, a scale (oxidized layer) is formed on the surface layer of the base material. Therefore, when the inner ring (41) shown in Fig. 2 is carburized, the hole size is reduced due to the scale formed in the through hole (42) and the radial passage (43), and in some cases clogging may occur. May result in poor lubrication. On the other hand, in order to avoid such a problem, the through hole (42) or the radial passage (43) should be carburized before carburizing, or both holes (42) (43) should be carburized after carburizing. It is sufficient to remove the scale inside, but since many through holes (42) and radial passages (43) are formed, these operations become extremely complicated.
【０００６】 そこで、本考案は、内輪の製作工程を煩雑化させることなく、許容回転数を向 上させ得る高速回転用転がり軸受の提供を目的とする。Therefore, an object of the present invention is to provide a rolling bearing for high-speed rotation, which can improve the permissible rotational speed without complicating the manufacturing process of the inner ring.
【０００７】[0007]
上記目的達成のため、本考案では、内輪の軌道面下に貫通孔を有し、この貫通 孔内に流通させた潤滑油により潤滑・冷却される高速回転用転がり軸受において 、内輪の少なくとも軌道面に高周波焼入れを施した。 In order to achieve the above object, in the present invention, at least a raceway surface of the inner ring is provided in a rolling bearing for high speed rotation, which has a through hole under the raceway surface of the inner ring and is lubricated and cooled by the lubricating oil circulated in the through hole. Was induction hardened.
【０００８】[0008]
内輪の少なくとも軌道面に高周波焼入れを施すと、当該軌道面に圧縮残留応力 が形成される。この圧縮残留応力により、内輪に生じる引張りフープ応力が相殺 されるので、軸受の許容回転数が向上する。また、高周波焼入れでは、必要箇所 にのみ所定の深さで圧縮残留応力を形成することができ、それ以外の部分では母 材の組成変化がほとんど生じない。従って、貫通孔近傍の組成を変化させること なく軌道面の最表層にのみ圧縮残留応力を形成することができる。この結果、熱 処理後にも所期の孔寸法を維持することができ、防浸炭加工やスケールの除去作 業が不要となる。 When induction hardening is applied to at least the raceway surface of the inner ring, a compressive residual stress is formed on the raceway surface. This compressive residual stress cancels the tensile hoop stress generated in the inner ring, thus improving the allowable rotational speed of the bearing. Further, in induction hardening, a compressive residual stress can be formed only in a necessary portion at a predetermined depth, and the composition of the base material hardly changes in other portions. Therefore, the compressive residual stress can be formed only in the outermost layer of the raceway surface without changing the composition in the vicinity of the through hole. As a result, the desired pore size can be maintained even after heat treatment, eliminating the need for carburizing and scale removal operations.
【０００９】[0009]
以下、本考案をアンギュラ玉軸受に適用した場合の実施例を図１に基づいて説 明する。 An embodiment in which the present invention is applied to an angular contact ball bearing will be described below with reference to FIG.
【００１０】 図示のように、アンギュラ玉軸受は、軸（１）に固定された内輪（２）と、ハ ウジング（３）に固定された外輪（４）と、内・外輪（２）（４）間に介在する 多数のボール（５）及び保持器（６）とで構成される。As shown, the angular ball bearing has an inner ring (2) fixed to a shaft (1), an outer ring (4) fixed to a housing (3), and inner / outer rings (2) (4). ), A plurality of balls (5) and a cage (6).
【００１１】 内輪（２）の一端には、軸方向に延びるスクープ（７）が形成されている。ス クープ（７）の内側は、環状空間（８）になっており、この環状空間（８）に、 内輪（２）の軌道面（2a）下を軸方向に走る貫通孔（９）の一方の開口（9a）が 連通している。また、貫通孔（９）と内輪（２）の軌道面（2a）とは、径方向通 路（10）を介して連通している。At one end of the inner ring (2), a scoop (7) extending in the axial direction is formed. The inside of the scoop (7) is an annular space (8), and one of the through holes (9) running axially below the raceway surface (2a) of the inner ring (2) is provided in this annular space (8). The opening (9a) of is communicating. Further, the through hole (9) and the raceway surface (2a) of the inner ring (2) communicate with each other via a radial passage (10).
【００１２】 外輪（４）の端面に接する外輪間座（11）は、環状空間（８）に向けて潤滑剤 （Ｌ）を供給する第１の噴射孔（12）と、内輪（２）の外径と保持器（６）の内 径との間の空間に向けて潤滑剤（Ｌ）を供給する第２の噴射孔（13）とを有する 。第１及び第２の噴射孔（12）（13）は、それぞれノズル（11ａ）（11ｂ）を介 してハウジング（３）に設けた給油通路（3a）に連通している。The outer ring spacer (11) in contact with the end surface of the outer ring (4) includes a first injection hole (12) for supplying the lubricant (L) toward the annular space (8) and an inner ring (2). A second injection hole (13) for supplying the lubricant (L) toward the space between the outer diameter and the inner diameter of the cage (6). The first and second injection holes (12) (13) communicate with the oil supply passage (3a) provided in the housing (3) via the nozzles (11a) (11b), respectively.
【００１３】 第１の噴射孔（12）から供給される潤滑剤（Ｌ）は、環状空間（８）を経由し て貫通孔（９）に流入し、内輪（２）の冷却を行なう。そして、貫通孔（９）に 流入した潤滑剤（Ｌ）の一部は径方向通路（10）を通って内輪（２）の軌道面（ 2a）に供給され、主に軌道面（2a）の潤滑を行なう。第２の噴射孔（13）から供 給される潤滑剤（Ｌ）は内輪（２）の外径と保持器（６）の内径との間の空間に 流入した後、軸受回転に伴う遠心力によって外径側に移動し、軸受内の潤滑並び に外輪（４）の潤滑を行なう。このように、本実施例の潤滑装置は、前述のアン ダーレース潤滑の他、いわゆるノズルジェット潤滑も併せて行なうようにしたも のである。The lubricant (L) supplied from the first injection hole (12) flows into the through hole (9) via the annular space (8) and cools the inner ring (2). Then, a part of the lubricant (L) that has flowed into the through hole (9) is supplied to the raceway surface (2a) of the inner ring (2) through the radial passage (10), and mainly of the raceway surface (2a). Lubricate. The lubricant (L) supplied from the second injection hole (13) flows into the space between the outer diameter of the inner ring (2) and the inner diameter of the cage (6), and then the centrifugal force generated by the rotation of the bearing. The outer ring (4) is lubricated along with the lubrication inside the bearing. As described above, the lubrication apparatus of the present embodiment is configured to perform so-called nozzle jet lubrication in addition to the above-mentioned under-race lubrication.
【００１４】 本考案では、内輪（２）の軌道面（2a）に圧縮残留応力を有する硬化層（16） を形成している。この硬化層（16）は、貫通孔（９）及び径方向通路（10）の形 成後に、例えば高周波焼入れ等の熱処理を施すことにより形成される。この硬化 層（16）の硬度や深さ等は、軸受寸法並びに軸受の種類等に応じて決定されるも のであるが、例えば、硬度はＨＲＣ５０程度とし、深さは1〜1.5mm程度とする。 また、この場合の軸受材料としては、Ｓ５３Ｃが好適である。In the present invention, the hardened layer (16) having a compressive residual stress is formed on the raceway surface (2a) of the inner ring (2). The hardened layer (16) is formed by subjecting the through hole (9) and the radial passage (10) to heat treatment such as induction hardening. The hardness, depth, etc. of the hardened layer (16) are determined according to the bearing size, type of bearing, etc. For example, the hardness is about HRC50 and the depth is about 1 to 1.5 mm. . Further, as the bearing material in this case, S53C is suitable.
【００１５】 このように、内輪（２）の軌道面に硬化層（16）を形成したことから、内輪（ ２）に生じる引張りフープ応力は、硬化層（16）の圧縮残留応力で相殺される。 これにより、内輪（２）の膨張が抑制されるので、結果的に軸受の許容回転数が 向上する。この効果は、硬化層（16）を内輪（２）の軌道面（2a）のみならず、 その幅面や内径面に形成することによって、より一層顕著に得られる。Since the hardened layer (16) is formed on the raceway surface of the inner ring (2) as described above, the tensile hoop stress generated in the inner ring (2) is canceled by the compressive residual stress of the hardened layer (16). . As a result, expansion of the inner ring (2) is suppressed, and as a result, the allowable rotational speed of the bearing is improved. This effect is more remarkably obtained by forming the hardened layer (16) not only on the raceway surface (2a) of the inner ring (2) but also on its width surface and inner diameter surface.
【００１６】 また、高周波焼入れによれば、必要箇所にのみ所定深さの硬化層（16）を形成 することができ、それ以外の部分では母材の組成変化がほとんど生じない。従っ て、貫通孔（９）及び径方向通路（10）の近傍の組成が変化せず、両孔（９）（ 10）の防浸炭加工や、両通路（９）（10）内に形成されたスケールの除去作業が 不要となり、内輪製作工程の煩雑化が回避できる。さらに、高周波焼入れは、急 熱・急冷であるため、浸炭処理に比べて大きな圧縮残留応力を確保することが可 能である。また、浸炭処理を施せば、母材の表層に粒界酸化が生じるが、高周波 焼入れではこのような粒界酸化が生じないという利点もある。Further, according to the induction hardening, the hardened layer (16) having a predetermined depth can be formed only in a necessary portion, and the composition of the base material hardly changes in other portions. Therefore, the composition in the vicinity of the through hole (9) and the radial passage (10) does not change, and it is formed in both the passages (9) and (10) by the carburization prevention treatment of both holes (9) and (10). It eliminates the need for scale removal work and avoids complicating the inner ring manufacturing process. Furthermore, since induction hardening is rapid heating and rapid cooling, it is possible to secure a large compressive residual stress compared to carburizing. Further, if carburizing is performed, grain boundary oxidation occurs in the surface layer of the base material, but there is also an advantage that such grain boundary oxidation does not occur in induction hardening.
【００１７】 なお、本考案は、上述のアンダーレース潤滑とノズルジェット潤滑の組み合わ せのみならず、アンダーレース潤滑単独や、他の強制潤滑法との組み合わせにも 同様に適用することができる。また、当然のことながら、軸受形式もアンギュラ 玉軸受に限らず、円筒ころ軸受等の他の軸受形式であってもよい。The present invention can be applied not only to the above-described combination of underlace lubrication and nozzle jet lubrication, but also to underlace lubrication alone or in combination with another forced lubrication method. Further, as a matter of course, the bearing type is not limited to the angular ball bearing, and may be another bearing type such as a cylindrical roller bearing.
【００１８】 さらに、圧縮残留応力を有する硬化層（16）が必要箇所にのみ形成されるので あれば、高周波焼入れ以外の他の処理方法、例えばショットピーニングやショッ トブラスト等も使用可能である。Further, as long as the hardened layer (16) having a compressive residual stress is formed only in a necessary portion, a treatment method other than induction hardening such as shot peening or shot blasting can be used.
【００１９】[0019]
このように、本考案によれば、内輪の少なくとも軌道面に高周波焼入れを施す して当該軌道面に圧縮残留応力を形成したので、高速回転に伴う内輪の膨張が抑 制され、結果的に許容回転数を向上させることが可能となる。一方、高周波焼入 れでは、母材の表層にのみ圧縮残留応力が形成されるので、貫通孔の近傍ではほ とんど組成変化が生じない。従って、貫通孔に防浸炭加工を施したり、貫通孔内 に形成されたスケールの除去作業等が不要となり、内輪製作工程の煩雑化が回避 できる。 As described above, according to the present invention, at least the raceway surface of the inner ring is subjected to induction hardening to form a compressive residual stress on the raceway surface. It is possible to improve the rotation speed. On the other hand, in induction hardening, a compressive residual stress is formed only in the surface layer of the base material, so almost no composition change occurs near the through hole. Therefore, it is not necessary to perform carburization-proofing processing on the through holes or to remove scales formed in the through holes, and it is possible to avoid complication of the inner ring manufacturing process.
【図１】本考案の実施例を示す断面図（ａ）、及び、
（ａ）図中のＡ方向矢示図（ｂ）である。FIG. 1 is a sectional view (a) showing an embodiment of the present invention, and
(A) It is a figure (b) of an arrow A direction in a figure.
【図２】アンダーレース潤滑の基本構造を示す断面図で
ある。FIG. 2 is a sectional view showing a basic structure of underlace lubrication.
２ 内輪 2a 軌道面 ９ 貫通孔 Ｌ 潤滑剤 2 Inner ring 2a Raceway 9 Through hole L Lubricant
Claims (1)
通孔内に流通させた潤滑油により潤滑・冷却される高速
回転用転がり軸受において、内輪の少なくとも軌道面に
高周波焼入れを施したことを特徴とする高速回転用転が
り軸受。1. In a rolling bearing for high speed rotation, which has a through hole under the raceway surface of an inner ring and is lubricated and cooled by a lubricating oil circulated in the through hole, at least the raceway surface of the inner ring is induction hardened. A rolling bearing for high speed rotation characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP015665U JPH0673451U (en) | 1993-03-31 | 1993-03-31 | Rolling bearing for high speed rotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP015665U JPH0673451U (en) | 1993-03-31 | 1993-03-31 | Rolling bearing for high speed rotation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0673451U true JPH0673451U (en) | 1994-10-18 |
Family
ID=11895041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP015665U Pending JPH0673451U (en) | 1993-03-31 | 1993-03-31 | Rolling bearing for high speed rotation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0673451U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006200720A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Thrust bearing for continuously variable transmission |
| JP2006200665A (en) * | 2005-01-21 | 2006-08-03 | Ntn Corp | Raceway disk of thrust bearing and thrust bearing |
| JP2006200719A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Thrust bearing for compressor of car air conditioner |
| JP2006200724A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Thrust bearing for automatic transmission |
| JP2008207587A (en) * | 2007-02-23 | 2008-09-11 | Ntn Corp | Bearing device for wheel and its manufacturing method |
| KR101271628B1 (en) * | 2011-09-30 | 2013-06-11 | 삼성중공업 주식회사 | Bearing structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4111918B2 (en) * | 2001-11-30 | 2008-07-02 | ユニロイヤル ケミカル カンパニー インコーポレイテッド | 1,3,4-oxadiazole additive for lubricants |
| JP4136323B2 (en) * | 2001-03-09 | 2008-08-20 | 株式会社リコー | Heating device, fixing device and image forming apparatus |
-
1993
- 1993-03-31 JP JP015665U patent/JPH0673451U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4136323B2 (en) * | 2001-03-09 | 2008-08-20 | 株式会社リコー | Heating device, fixing device and image forming apparatus |
| JP4111918B2 (en) * | 2001-11-30 | 2008-07-02 | ユニロイヤル ケミカル カンパニー インコーポレイテッド | 1,3,4-oxadiazole additive for lubricants |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006200665A (en) * | 2005-01-21 | 2006-08-03 | Ntn Corp | Raceway disk of thrust bearing and thrust bearing |
| JP2006200720A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Thrust bearing for continuously variable transmission |
| JP2006200719A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Thrust bearing for compressor of car air conditioner |
| JP2006200724A (en) * | 2005-01-24 | 2006-08-03 | Ntn Corp | Thrust bearing for automatic transmission |
| JP2008207587A (en) * | 2007-02-23 | 2008-09-11 | Ntn Corp | Bearing device for wheel and its manufacturing method |
| KR101271628B1 (en) * | 2011-09-30 | 2013-06-11 | 삼성중공업 주식회사 | Bearing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19980818 |