[go: up one dir, main page]

JP2001271842A - Rolling bearing - Google Patents

Rolling bearing

Info

Publication number
JP2001271842A
JP2001271842A JP2000086505A JP2000086505A JP2001271842A JP 2001271842 A JP2001271842 A JP 2001271842A JP 2000086505 A JP2000086505 A JP 2000086505A JP 2000086505 A JP2000086505 A JP 2000086505A JP 2001271842 A JP2001271842 A JP 2001271842A
Authority
JP
Japan
Prior art keywords
cermet
graphite
rolling bearing
ball
rolling
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.)
Granted
Application number
JP2000086505A
Other languages
Japanese (ja)
Other versions
JP4188536B2 (en
Inventor
Kazunori Hayashida
一徳 林田
Sho Imayoshi
祥 今吉
Norihisa Ishida
紀久 石田
Hiroshi Nunokawa
浩 布川
Toshiro Ichikawa
利郎 市川
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.)
Koyo Seiko Co Ltd
Mitsubishi Heavy Industries Ltd
Nuclear Development Corp
Japan Atomic Energy Agency
Original Assignee
Koyo Seiko Co Ltd
Japan Atomic Energy Research Institute
Mitsubishi Heavy Industries Ltd
Nuclear Development 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 Koyo Seiko Co Ltd, Japan Atomic Energy Research Institute, Mitsubishi Heavy Industries Ltd, Nuclear Development Corp filed Critical Koyo Seiko Co Ltd
Priority to JP2000086505A priority Critical patent/JP4188536B2/en
Publication of JP2001271842A publication Critical patent/JP2001271842A/en
Application granted granted Critical
Publication of JP4188536B2 publication Critical patent/JP4188536B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/32Balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/3831Ball cages with hybrid structure, i.e. with parts made of distinct materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/3837Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/3837Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3881Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages with more than three parts, e.g. two end rings connected by individual stays
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/38Ball cages
    • F16C33/44Selection of substances
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/62Selection of substances
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/66Special parts or details in view of lubrication
    • F16C33/6696Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2206/00Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
    • F16C2206/80Cermets, i.e. composites of ceramics and metal

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

(57)【要約】 【課題】 高温高圧下の水中で使用しても、軸受耐久性
(耐食,強度,潤滑)を確保でき、寿命の長い転がり軸受を
提供する。 【解決手段】 この転がり軸受は、内輪1および外輪2
がSUS316の母材にステライトNo.1を肉盛するこ
とで、各軌道面1a,2aがステライトNo.1で作製さ
れている。また、転動体である玉3はサーメットからな
る。また、保持器5は、グラファイト製基部6と、この
基部6の両側面にビス又はリベット止めされたSUS3
04製補強板7,8からなる。この転がり軸受は、保持
器5のグラファイト製基部6が、サーメット製の玉3に
対して、潤滑の役目を果し、高温高圧の水中において玉
3の摩耗を顕著に抑制できることが実験で確認できた。
(57) [Abstract] [Problem] Bearing durability even when used in water under high temperature and high pressure
(Corrosion resistance, strength, lubrication), and provide a long-life rolling bearing. The rolling bearing includes an inner ring (1) and an outer ring (2).
Is that stellite No. 1 is built up on the base material of SUS316, so that the respective raceway surfaces 1a and 2a are made of stellite No. 1. The ball 3 as a rolling element is made of cermet. The retainer 5 includes a graphite base 6 and SUS3 screws or riveted to both sides of the base 6.
It consists of 04 reinforcing plates 7,8. In this rolling bearing, it can be confirmed by an experiment that the graphite base 6 of the cage 5 serves as a lubricator for the cermet ball 3 and can significantly suppress the wear of the ball 3 in high-temperature and high-pressure water. Was.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、たとえば、船舶
用原子炉に搭載される原子炉容器内装型制御捧駆動機構
において高温高圧下の水中で使用される転がり軸受に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing used in water under high temperature and high pressure, for example, in a control drive mechanism inside a reactor vessel mounted on a marine reactor.

【0002】[0002]

【従来の技術】船舶用原子炉に搭載される原子炉容器内
装型制御捧駆動機構に用いられる転がり軸受は、高温高
圧下、たとえば、320℃〜350℃で12〜15MP
aの水中という過酷な条件で試用される。
2. Description of the Related Art Rolling bearings used for a control drive mechanism inside a reactor vessel mounted on a marine reactor are operated at a high temperature and a high pressure, for example, at 320 to 350 ° C. and 12 to 15 MPa.
It is used under the severe condition of underwater a.

【0003】従来、この種の転がり軸受としては、特開
平9−87025号公報で開示されているものがある。
この転がり軸受は、内,外輪および保持器が、SUS3
04,SUS630等の耐食性に優れたオーステナイト
系ステンレス鋼からなり、転動体(玉)が炭化ケイ素(S
iC)からなる。
Conventionally, as this kind of rolling bearing, there is one disclosed in Japanese Patent Application Laid-Open No. 9-87025.
In this rolling bearing, the inner and outer rings and the cage are made of SUS3
04, SUS630 etc. made of austenitic stainless steel with excellent corrosion resistance, and the rolling element (ball) is made of silicon carbide (S
iC).

【0004】[0004]

【発明が解決しようとする課題】ところが、この従来例
では、転動体としての玉が炭化ケイ素からなるから、潤
滑性に乏しく、玉が摩耗して、軌道の摩耗が速く進行し
て短寿命になるという問題があった。
However, in this conventional example, since the ball as a rolling element is made of silicon carbide, lubrication is poor, the ball wears, and the wear of the raceway progresses quickly to shorten the life. There was a problem of becoming.

【0005】そこで、この発明の目的は、高温高圧下の
水中で使用しても、軸受耐久性(耐食,強度,潤滑)を確保
でき、寿命の長い転がり軸受を提供することにある。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a long-life rolling bearing which can ensure the durability of the bearing (corrosion resistance, strength, lubrication) even when used in water under high temperature and pressure.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するた
め、請求項1の発明の転がり軸受は、少なくとも表面部
がサーメット,ステライト,SUS630から選ばれる材
料からなる軌道輪と、サーメットからなる転動体と、少
なくとも上記転動体と接触する部分がグラファイトから
なる保持器とを備えることを特徴としている。
In order to achieve the above object, a rolling bearing according to the first aspect of the present invention is characterized in that at least a surface portion of the bearing ring is made of a material selected from cermet, stellite, and SUS630, and a rolling element made of cermet. And a retainer made of graphite at least in contact with the rolling element.

【0007】この請求項1の発明では、転動体がサーメ
ットからなり、保持器は上記転動体と接触する部分がグ
ラファイトからなる。このグラファイトからなる保持器
の接触部分が、サーメット製転動体に対して、潤滑の役
目を果すので、高温高圧下の水中で使用しても、転動体
の摩耗を抑制できることが実験により判明した。これに
対し、炭化ケイ素(SiC)からなる転動体にグラファイ
トからなる保持器を組み合わせた場合には、転動体の摩
耗が激しくて短寿命となった。
According to the first aspect of the present invention, the rolling element is made of cermet, and a portion of the retainer that contacts the rolling element is made of graphite. Experiments have shown that wear of the rolling elements can be suppressed even when used in water under high temperature and high pressure, because the contact portions of the cage made of graphite serve to lubricate the cermet rolling elements. On the other hand, when the rolling element made of silicon carbide (SiC) was combined with the cage made of graphite, the rolling element was severely worn, resulting in a short life.

【0008】また、請求項2の発明は、請求項1に記載
の転がり軸受において、上記軌道輪は、軌道面がステラ
イトからなり、母材がSUS316またはSUS304
からなることを特徴としている。
According to a second aspect of the present invention, in the rolling bearing according to the first aspect, the raceway surface of the race is made of stellite, and the base material is SUS316 or SUS304.
It is characterized by consisting of.

【0009】この請求項2の発明では、軌道輪の母材は
耐腐食性が良いSUS316またはSUS304からな
り、軌道面は硬さが硬い(HRC50〜55)ステライト
の盛金からなる。この発明では、軌道輪と転動体とが異
種材料からなることとなり、軌道輪と転動体との凝着が
起こり難くなるから、高温高圧下での使用に対する耐久
性を高めることができる。
According to the second aspect of the present invention, the base material of the bearing ring is made of SUS316 or SUS304 having good corrosion resistance, and the raceway surface is made of stellite ferrite having a high hardness (50 to 55 HRC). According to the present invention, since the race and the rolling element are made of different materials, adhesion between the race and the rolling element is less likely to occur, so that durability against use under high temperature and high pressure can be improved.

【0010】また、請求項3の発明は、請求項1に記載
の転がり軸受において、上記軌道輪が、サーメットのみ
でできていることを特徴としている。
According to a third aspect of the present invention, in the rolling bearing according to the first aspect, the race is made of only cermet.

【0011】この請求項3の発明は、軌道輪が、サーメ
ットのみでできているから、転動体と軌道輪の両方がサ
ーメット製となり、両方共、グラファイト製の保持器に
対する潤滑性がよくなる。これにより、更なる寿命向上
を図れる。
According to the third aspect of the present invention, since the bearing ring is made of only cermet, both the rolling element and the bearing ring are made of cermet, and both of them have improved lubricity with respect to the graphite cage. Thereby, the service life can be further improved.

【0012】また、請求項4の発明は、請求項1に記載
の転がり軸受において、上記保持器は、SUS304ま
たはSUS316からなる補強材で補強されていること
を特徴としている。
According to a fourth aspect of the present invention, in the rolling bearing according to the first aspect, the retainer is reinforced by a reinforcing material made of SUS304 or SUS316.

【0013】この請求項4の発明は、グラファイト製保
持器がSUS304またはSUS316からなる補強材
で補強されているから、保持器の強度を向上できる。
According to the fourth aspect of the present invention, the strength of the cage can be improved because the graphite cage is reinforced by the reinforcing material made of SUS304 or SUS316.

【0014】[0014]

【発明の実施の形態】以下、この発明を図示の実施の形
態により詳細に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

【0015】〔第1の実施の形態〕図1に、この発明の
転がり軸受の第1実施形態を示す。この第1実施形態
は、内輪1および外輪2がSUS316の母材にステラ
イトNo.1(商品名:三菱マテリアル社製)を、たとえ
ば、溶射による硬化肉盛(盛金)することで、各軌道面1
a,2aがステライトNo.1で作製されている。また、
転動体である玉3はサーメットからなる。また、保持器
5は、グラファイト製基部6と、この基部6の両側面に
ビス又はリベット止めされたSUS304製補強板7,
8からなる。この実施形態では、上記グラファイトの物
性を、密度1.82mg/m3,ショア硬さ:80,曲げ強
さ:76.4MPa,熱膨張係数:5.6×10-6/℃,純
度:99.98%以上とした。また、上記サーメットの
物性を、見掛密度6.0g/cm3,ビッカース硬度165
0kg/mm3,曲げ強さ:150kg/mm3,ヤング率:
440GPa,線膨張係数:7.4×10-6/℃,破壊靭
性:8.5MN/m3/2とした。なお、上記グラファイト
製基部6は、図1に破線で示されるように、ポケット4
の略中心で合わさっている基部半片6a,6bからな
る。
FIG. 1 shows a rolling bearing according to a first embodiment of the present invention. In the first embodiment, the inner race 1 and the outer race 2 are formed by stellite No. 1 (trade name, manufactured by Mitsubishi Materials Corporation) on a base material of SUS316, for example, by hardening by thermal spraying (filling metal) so that each track is formed. Face 1
a, 2a are made of Stellite No. 1. Also,
The ball 3 as a rolling element is made of cermet. The retainer 5 includes a graphite base 6 and a SUS304 reinforcing plate 7, which is screwed or riveted to both sides of the base 6,
Consists of eight. In this embodiment, the physical properties of the graphite are as follows: density 1.82 mg / m 3 , Shore hardness: 80, flexural strength: 76.4 MPa, coefficient of thermal expansion: 5.6 × 10 −6 / ° C., purity: 99 .98% or more. The physical properties of the cermet were determined to be an apparent density of 6.0 g / cm 3 and a Vickers hardness of 165.
0 kg / mm 3 , flexural strength: 150 kg / mm 3 , Young's modulus:
440 GPa, linear expansion coefficient: 7.4 × 10 −6 / ° C., fracture toughness: 8.5 MN / m 3/2 . The graphite base 6 is provided with a pocket 4 as shown by a broken line in FIG.
Consists of base halves 6a and 6b that are joined at substantially the center of the base.

【0016】この第1実施形態によれば、転動体として
の玉3がサーメットからなり、保持器5は上記玉3と接
触する基部6がグラファイトからなる。このグラファイ
トからなる保持器5の基部6が、サーメット製の玉3に
対して、潤滑の役目を果すので、高温高圧の水中におい
て軌道をなす基部6の摩耗を顕著に抑制でき、軸受耐久
性(耐食,強度,潤滑)を確保できることが後述する実験に
より判明した。これに対し、炭化ケイ素(SiC)からな
る転動体にグラファイトからなる保持器を組み合わせた
場合には、転動体の摩耗が激しくて短寿命となった。
According to the first embodiment, the ball 3 as a rolling element is made of cermet, and the holder 5 of the retainer 5 is made of graphite in contact with the ball 3. Since the base 6 of the retainer 5 made of graphite serves to lubricate the cermet balls 3, wear of the base 6 forming an orbit in high-temperature and high-pressure water can be significantly suppressed, and the bearing durability ( Experiments described later revealed that corrosion resistance, strength, and lubrication can be ensured. On the other hand, when the rolling element made of silicon carbide (SiC) was combined with the cage made of graphite, the rolling element was severely worn, resulting in a short life.

【0017】また、この第1実施形態によれば、内,外
輪1,2の母材は耐腐食性が良いSUS316からな
り、軌道面1a,2aは硬さが硬い(HRC50〜55)
ステライトNo.1の盛金からなる。したがって、内,外
輪1,2の軌道面1a,2aと玉3とが異種材料(ステラ
イトNo.1とサーメット)からなることとなり、内,外輪
1,2と玉3との凝着が起こり難くなる。なお、SUS
316に代えて、同じく耐食性に優れたSUS304を
使用してもよい。また、この第1実施形態によれば、グ
ラファイト製保持器5がSUS304製補強板7,8で
補強されているから、保持器5の強度を向上できる。
According to the first embodiment, the base materials of the inner and outer races 1 and 2 are made of SUS316 having good corrosion resistance, and the raceways 1a and 2a are hard (HRC 50 to 55).
It is made of Stellite No. 1. Accordingly, the raceway surfaces 1a, 2a of the inner and outer rings 1, 2 and the balls 3 are made of different materials (Stellite No. 1 and cermet), and adhesion between the inner and outer rings 1, 2 and the balls 3 hardly occurs. Become. In addition, SUS
Instead of 316, SUS304 which is also excellent in corrosion resistance may be used. Further, according to the first embodiment, the strength of the cage 5 can be improved because the graphite cage 5 is reinforced by the SUS304 reinforcing plates 7 and 8.

【0018】なお、この第1実施形態では、保持器5を
補強する補強板7,8をSUS304製としたがSUS
316製としてもよい。また、内,外輪1,2の全体をS
US630で作製してもよい。なお、この場合、SUS
630の表面にクローム酸や重クロム酸塩を主成分とす
るクロメート処理あるいはクロムカーバイド等のクロム
系コーティングが施されうる。クロムカーバイドは、例
えば、爆発溶射によって、0.2mmの厚みでコーティ
ングされる。これを第2実施形態とする。
In the first embodiment, the reinforcing plates 7, 8 for reinforcing the retainer 5 are made of SUS304.
316. The entire inner and outer rings 1 and 2 are S
It may be manufactured in US630. In this case, SUS
The surface of 630 may be subjected to a chromate treatment mainly containing chromic acid or dichromate, or a chromium-based coating such as chromium carbide. Chromium carbide is coated with a thickness of 0.2 mm, for example, by explosive spraying. This is referred to as a second embodiment.

【0019】〔第3の実施の形態〕次に、この発明の転
がり軸受の第3実施形態を図2(A),(B)および図3に
示す。この第3実施形態は、内輪21と外輪22が、サ
ーメットのみでできている点だけが、前述の第1,2実
施形態と異なる。したがって、この第3実施形態でも、
玉23はサーメットからなり、保持器25はグラファイ
ト製の基部26と、この基部26の両側面にビス又はリ
ベット止めされたSUS304製補強板27,28から
なる。
Third Embodiment Next, a third embodiment of the rolling bearing according to the present invention is shown in FIGS. 2A, 2B and 3. FIG. The third embodiment differs from the first and second embodiments only in that the inner race 21 and the outer race 22 are made of only cermet. Therefore, also in the third embodiment,
The ball 23 is made of cermet, and the retainer 25 is made up of a graphite base 26 and SUS304 reinforcing plates 27 and 28 screwed or riveted to both sides of the base 26.

【0020】図2(B)および図3に示すように、保持器
25のグラファイト製の基部26は、玉23が嵌め込ま
れるポケット30の中心を通る円環状割れ面31で合わ
さった2つのリング32,33で構成され、この2つの
リング32,33を貫くビス又はリベット35で基部2
6の両側面に2枚のSUS304製補強板27,28が
ビス又はリベット止めされている。
As shown in FIGS. 2B and 3, the graphite base 26 of the retainer 25 has two rings 32 joined by an annular cracked surface 31 passing through the center of the pocket 30 into which the ball 23 is fitted. , 33, and screws or rivets 35 passing through the two rings 32, 33 are used to form the base 2.
6, two reinforcing plates 27 and 28 made of SUS304 are screwed or riveted to both sides.

【0021】この第3実施形態では、内,外輪21,22
が、サーメットのみでできているから、玉3と内,外輪
21,22の両方がサーメット製となり、両方共、グラ
ファイト製の保持器25に対する潤滑性がよくなる。し
たがって、更なる寿命向上を図れる。なお、保持器25
のグラファイト製基部26が2枚のSUS304製補強
板27,28で補強されている点は、前述の第1,2実施
形態と同様である。
In the third embodiment, the inner and outer rings 21 and 22
However, since only the cermet is used, both the ball 3 and the inner and outer rings 21 and 22 are made of cermet, and both of them have improved lubricity with respect to the graphite retainer 25. Therefore, the service life can be further improved. The retainer 25
Is similar to the first and second embodiments in that the graphite base 26 is reinforced by two SUS304 reinforcing plates 27 and 28.

【0022】〔第4の実施の形態〕次に、図4(A),
(B)および図5に、この発明の第4実施形態を示す。こ
の第4実施形態は、外輪67と内輪68および玉70が
サーメット製である点は前述の第3実施形態と同様であ
り、保持器55の構造だけが前述の第3実施形態と異な
る。
[Fourth Embodiment] Next, FIG.
(B) and FIG. 5 show a fourth embodiment of the present invention. The fourth embodiment is the same as the third embodiment in that the outer ring 67, the inner ring 68, and the ball 70 are made of cermet, and differs from the third embodiment only in the structure of the retainer 55.

【0023】この保持器55は、図4(B)に示すよう
に、SUS304製の外枠部56とグラファイト製の円
筒摺動部57,57…からなる。上記外枠部56は、保
持器55のポケット58,58…の中心を通る割れ面6
0で合わさった2つの円環枠61と62からなり、この
2つの円環枠61,62は、ビス又はリベット63で固
定されている。また、上記グラファイト製の円筒摺動部
57も上記割れ面60で合わさった2つの半円筒部6
5,66からなる。図3(A)に示すように、このグラフ
ァイト製の円筒摺動部57は、上記外枠部56よりも径
方向に長くなっていて、外枠部56がサーメット製外輪
67に接触しないようになっている。
As shown in FIG. 4B, the retainer 55 includes an outer frame 56 made of SUS304 and cylindrical sliding parts 57 made of graphite. The outer frame portion 56 has a cracked surface 6 passing through the center of the pockets 58, 58.
It is composed of two annular frames 61 and 62 joined at zero, and these two annular frames 61 and 62 are fixed with screws or rivets 63. In addition, the graphite cylinder sliding portion 57 also has two semi-cylindrical portions 6 joined by the cracked surface 60.
It consists of 5,66. As shown in FIG. 3 (A), the graphite sliding portion 57 is radially longer than the outer frame portion 56 so that the outer frame portion 56 does not contact the cermet outer ring 67. Has become.

【0024】この第4実施形態によれば、保持器55の
SUS304製の外枠部56が基部をなし、玉70との
摺動部57がグラファイト製であるから、前述の第3実
施形態の保持器25に比べて、保持器強度を向上させる
ことができる。なお、この第4実施形態では、第3実施
形態と同様に、内,外輪68,67が、サーメットのみで
できているから、玉70と内,外輪68,67の両方がサ
ーメット製となり、両方共、保持器55のグラファイト
製の摺動部57に対する潤滑性がよくなる。
According to the fourth embodiment, the outer frame 56 made of SUS304 of the retainer 55 forms the base, and the sliding portion 57 with the ball 70 is made of graphite. Compared with the cage 25, the cage strength can be improved. In the fourth embodiment, as in the third embodiment, since the inner and outer rings 68 and 67 are made of only cermet, both the ball 70 and the inner and outer rings 68 and 67 are made of cermet. In both cases, the lubricating properties of the retainer 55 with respect to the graphite sliding portion 57 are improved.

【0025】〔第5の実施の形態〕次に、図6(A),
(B)および図7に、この発明の第5実施形態を示す。こ
の第5実施形態は、外輪82と内輪81および玉80が
サーメット製である点は前述の第4実施形態と同様であ
り、保持器95の構造だけが前述の第3実施形態と異な
る。
[Fifth Embodiment] Next, FIG.
(B) and FIG. 7 show a fifth embodiment of the present invention. The fifth embodiment is the same as the fourth embodiment in that the outer ring 82, the inner ring 81, and the ball 80 are made of cermet, and differs from the third embodiment only in the structure of the retainer 95.

【0026】この保持器95は、図6(B)に示すよう
に、SUS304製の外枠部96とグラファイト製の矩
形摺動部97,97…からなる。上記外枠部96は、保
持器95のポケット98,98…の中心を通る割れ面9
4で合わさった2つの円環枠91と92からなり、この
2つの円環枠91,92は、ビス又はリベット93で固
定されている。また、上記グラファイト製の矩形摺動部
97も上記割れ面94で合わさった2つの半矩形部9
9,100からなる。図6(A)に示すように、このグラ
ファイト製の矩形摺動部97は、上記外枠部96よりも
径方向に長くなっていて、外枠部96がサーメット製外
輪82に接触しないようになっている。
As shown in FIG. 6B, the retainer 95 comprises an outer frame 96 made of SUS304 and rectangular sliding parts 97 made of graphite. The outer frame portion 96 is provided with a cracked surface 9 passing through the center of the pockets 98, 98,.
4, the two annular frames 91 and 92 are fixed by screws or rivets 93. The graphite rectangular sliding portion 97 also has two half-rectangular portions 9 joined by the cracked surface 94.
It consists of 9,100. As shown in FIG. 6 (A), the rectangular sliding portion 97 made of graphite is longer in the radial direction than the outer frame portion 96 so that the outer frame portion 96 does not come into contact with the outer ring 82 made of cermet. Has become.

【0027】この第5実施形態によれば、保持器95の
SUS304製の外枠部96が基部をなし、玉80との
摺動部98がグラファイト製であるから、前述の第3実
施形態の保持器25に比べて、保持器強度を向上させる
ことができる。なお、この第5実施形態では、第4実施
形態と同様に、内,外輪81,82が、サーメットのみで
できているから、玉80と内,外輪81,82の両方がサ
ーメット製となり、両方共、保持器95のグラファイト
製の摺動部98に対する潤滑性がよくなる。
According to the fifth embodiment, the outer frame 96 made of SUS304 of the retainer 95 forms the base, and the sliding portion 98 with the ball 80 is made of graphite. Compared with the cage 25, the cage strength can be improved. In the fifth embodiment, similarly to the fourth embodiment, the inner and outer rings 81 and 82 are made of only cermet, so that both the ball 80 and the inner and outer rings 81 and 82 are made of cermet. In both cases, the lubricating property of the retainer 95 against the graphite sliding portion 98 is improved.

【0028】〔実験例〕次に、図8を参照して、転がり
軸受の高温水中転がり摩耗試験結果を説明する。この試
験は、雰囲気温度320℃で120Kgf/cm2の水中で
おこない、図8(A)に示すように、玉101を回転盤1
02と平板試験片103とで上下から挟み、玉101に
保持器105を嵌合させた状態で、回転盤102を回転
させて行った。ここで、回転速度は、転動部の周速を約
0.373m/秒とし、転動面の面圧を約190kgf/
mm2とした。また、試験時間は、回転盤102が43
0万回転するまでとした。
[Experimental Example] Next, referring to FIG. 8, the result of a high-temperature underwater rolling wear test of a rolling bearing will be described. This test was performed in water of 120 kgf / cm 2 at an ambient temperature of 320 ° C., and as shown in FIG.
02 was sandwiched from above and below by the flat plate test piece 103, and the rotating disk 102 was rotated while the retainer 105 was fitted to the ball 101. Here, the rotation speed is set to a peripheral speed of the rolling part of about 0.373 m / sec, and a surface pressure of the rolling surface to about 190 kgf / sec.
It was mm 2. In addition, the test time was 43
It was until the rotation of 100,000.

【0029】上記転がり摩耗試験を、1から7の7種類
のサンプルについて行った試験結果を図5(B)に示す。
なお、この試験結果は、サンプル7について行った試験
後の摩耗度合いから算出した寿命を1とし、このサンプ
ル7の寿命1に対する寿命比で示した。
FIG. 5B shows the results of the above-mentioned rolling wear test performed on seven types of samples 1 to 7.
In this test result, the life calculated from the degree of wear after the test performed on Sample 7 was 1, and the life ratio of Sample 7 to Life 1 was shown.

【0030】図8(B)に示すように、サンプル1が上記
第1実施形態に相当し、サンプル2が上記第2実施形態
に相当し、サンプル3が上記第3,第4,第5実施形態に
相当する。サンプル1,サンプル2,サンプル3の試験結
果から分かるように、上記第1および第2,第3実施形
態によれば、従来例に相当するサンプル6の寿命に比べ
て、27倍以上に飛躍的に寿命が伸びることが判明し
た。
As shown in FIG. 8B, sample 1 corresponds to the first embodiment, sample 2 corresponds to the second embodiment, and sample 3 corresponds to the third, fourth, and fifth embodiments. It corresponds to the form. As can be seen from the test results of sample 1, sample 2, and sample 3, according to the first, second, and third embodiments, the life of sample 6 corresponding to the conventional example is remarkably 27 times or more. It was found that the life was extended.

【0031】なお、サンプル4,5,6に示すように、保
持器をグラファイト製とした場合でも、玉が炭化ケイ素
(SiC),窒化ケイ素(Si34),SUS440Cからな
る場合には、それぞれ、寿命比が8,0.2,10とな
り、本発明の第1,第2,第3,第4,第5実施形態に相当
するサンプル1,2,3に比べて、およそ2分の1以下の
寿命となった。
As shown in Samples 4, 5, and 6, even when the retainer was made of graphite, the balls were made of silicon carbide.
(SiC), silicon nitride (Si 3 N 4 ), and SUS440C, the life ratio is 8, 0.2, and 10, respectively, and the first, second, third, fourth, and fourth embodiments of the present invention. Compared to the samples 1, 2, and 3 corresponding to the fifth embodiment, the service life was about half or less.

【0032】[0032]

【発明の効果】以上より明らかなように、請求項1の発
明の転がり軸受は、軌道輪の少なくとも表面部がサーメ
ット,ステライト,SUS630から選ばれる材料からな
り、転動体がサーメットからなり、保持器は上記転動体
と接触する部分がグラファイトからなる。このグラファ
イトからなる保持器の接触部分が、サーメット製転動体
に対して、潤滑の役目を果すので、高温高圧下の水中で
使用しても、転動体の摩耗を著しく抑制できることが実
験により判明した。したがって、この発明によれば、高
温高圧の水中での軸受耐久性(耐食,強度,潤滑)を確保で
き、寿命の長い転がり軸受を提供できる。
As is apparent from the above description, in the rolling bearing according to the first aspect of the present invention, at least the surface of the race is made of a material selected from cermet, stellite, and SUS630, and the rolling element is made of cermet. Is made of graphite at the portion in contact with the rolling element. Experiments have shown that even when used in water under high temperature and high pressure, the wear of the rolling elements can be significantly suppressed, because the contact part of the graphite cage serves as a lubricant for the cermet rolling elements. . Therefore, according to the present invention, the durability of the bearing (corrosion resistance, strength, lubrication) in high-temperature and high-pressure water can be ensured, and a long-life rolling bearing can be provided.

【0033】また、請求項2の発明は、請求項1に記載
の転がり軸受において、上記軌道輪は、軌道面がステラ
イトからなり、母材がSUS316またはSUS304
である。この発明では、軌道輪の母材は耐腐食性が良い
SUS316またはSUS304からなり、軌道面は硬
さが硬い(HRC50〜55)ステライトからなる。した
がって、軌道輪と転動体とが異種材料からなることとな
り、軌道輪と転動体との凝着が起こり難くなり、高温高
圧下での使用に対する耐久性を高めることができる。
According to a second aspect of the present invention, in the rolling bearing according to the first aspect, the raceway surface of the race is made of stellite, and the base material is SUS316 or SUS304.
It is. In the present invention, the base material of the race is made of SUS316 or SUS304 having good corrosion resistance, and the raceway surface is made of hard (HRC50-55) stellite. Therefore, the bearing ring and the rolling element are made of different materials, the adhesion between the bearing ring and the rolling element is less likely to occur, and the durability against use under high temperature and high pressure can be enhanced.

【0034】また、請求項3の発明は、請求項1に記載
の転がり軸受において、上記軌道輪が、サーメットのみ
でできているから、転動体と軌道輪の両方がサーメット
製となり、両方共、グラファイト製の保持器に対する潤
滑性がよくなる。したがって、更なる寿命向上を図れ
る。
According to a third aspect of the present invention, in the rolling bearing according to the first aspect, since the race is made of only cermet, both the rolling element and the race are made of cermet. The lubricity of the graphite cage is improved. Therefore, the service life can be further improved.

【0035】また、請求項4の発明は、請求項1に記載
の転がり軸受において、上記保持器は、SUS304ま
たはSUS316からなる補強材で補強されているか
ら、保持器の強度を向上でき、一層の長寿命化を図れ
る。
According to a fourth aspect of the present invention, in the rolling bearing according to the first aspect, since the retainer is reinforced by a reinforcing material made of SUS304 or SUS316, the strength of the retainer can be improved. Life can be extended.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 この発明の転がり軸受の第1,第2実施形態
の断面図である。
FIG. 1 is a sectional view of first and second embodiments of a rolling bearing according to the present invention.

【図2】 図2(A)はこの発明の第3実施形態の断面図
であり、図2(B)はこの第3実施形態の保持器の要部を
示す図である。
FIG. 2A is a cross-sectional view of a third embodiment of the present invention, and FIG. 2B is a diagram illustrating a main part of a cage according to the third embodiment.

【図3】 上記第3実施形態の部分的な断面を示す断面
斜視図である。
FIG. 3 is a sectional perspective view showing a partial section of the third embodiment.

【図4】 図4(A)はこの発明の第4実施形態の断面図
であり、図3(B)はこの第4実施形態の保持器の要部を
示す図である。
FIG. 4 (A) is a sectional view of a fourth embodiment of the present invention, and FIG. 3 (B) is a diagram showing a main part of the retainer of the fourth embodiment.

【図5】 上記第4実施形態の部分的な断面を示す断面
斜視図である。
FIG. 5 is a sectional perspective view showing a partial section of the fourth embodiment.

【図6】 図6(A)はこの発明の第5実施形態の断面図
であり、図6(B)はこの第5実施形態の保持器の要部を
示す図である。
FIG. 6A is a cross-sectional view of a fifth embodiment of the present invention, and FIG. 6B is a diagram showing a main part of the retainer of the fifth embodiment.

【図7】 上記第5実施形態の部分的な断面を示す断面
斜視図である。
FIG. 7 is a sectional perspective view showing a partial section of the fifth embodiment.

【図8】 図8(A)は上記実施形態に相当するサンプル
による高温水中転がり摩耗試験の様子を説明する模式図
であり、図8(B)は上記摩耗試験結果を示す図表であ
る。
FIG. 8A is a schematic diagram illustrating a state of a high-temperature underwater rolling wear test using a sample corresponding to the embodiment, and FIG. 8B is a table showing the results of the wear test.

【符号の説明】 1,21,68…内輪、1a…軌道面、2,22,67…外
輪、2a…軌道面、3,23,70…玉、5,25…保持
器、26…グラファイト製基部、7,8,27,28…S
US304製補強板、56…SUS304製外枠部、5
7…グラファイト製円筒摺動部、30,58…ポケッ
ト、60…割れ面、61…円環枠。
[Description of Signs] 1,21,68 ... inner ring, 1a ... raceway, 2,22,67 ... outer ring, 2a ... raceway, 3,23,70 ... ball, 5,25 ... cage, 26 ... graphite Base, 7, 8, 27, 28 ... S
US304 reinforcing plate, 56 ... SUS304 outer frame, 5
7 ... graphite sliding part made of graphite, 30, 58 ... pocket, 60 ... broken surface, 61 ... annular frame.

───────────────────────────────────────────────────── フロントページの続き (71)出願人 000006208 三菱重工業株式会社 東京都千代田区丸の内二丁目5番1号 (72)発明者 林田 一徳 大阪府大阪市中央区南船場三丁目5番8号 光洋精工株式会社内 (72)発明者 今吉 祥 茨城県那珂郡東海村舟石川622番地12 ニ ュークリア・デベロップメント株式会社内 (72)発明者 石田 紀久 茨城県那珂郡東海村白方白根 日本原子力 研究所内 (72)発明者 布川 浩 茨城県那珂郡東海村白方白根 日本原子力 研究所内 (72)発明者 市川 利郎 兵庫県神戸市兵庫区和田崎町一丁目1番1 号 三菱重工業株式会社神戸造船所内 Fターム(参考) 3J101 AA02 AA32 AA42 AA54 AA62 BA10 BA34 BA45 BA50 BA70 EA01 EA06 EA12 EA41 EA47 EA78 FA08 FA15 FA31 FA32 GA60  ──────────────────────────────────────────────────続 き Continued from the front page (71) Applicant 000006208 Mitsubishi Heavy Industries, Ltd. 2-5-1 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor: Sho Imayoshi 622-12, Funakiishikawa, Tokai-mura, Naka-gun, Ibaraki Pref. (72) Inventor: Norihisa Ishida 72) Inventor Hiroshi Funagawa Inside the Japan Atomic Energy Research Institute, Shirakata Shirane, Tokai-mura, Naka-gun, Ibaraki Pref. (Reference) 3J101 AA02 AA32 AA42 AA54 AA62 BA10 BA34 BA45 BA50 BA70 EA01 EA06 EA12 EA41 EA47 EA78 FA08 FA15 FA31 FA32 GA60

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 少なくとも表面部がサーメット,ステラ
イト,SUS630から選ばれる材料からなる軌道輪
と、サーメットからなる転動体と、少なくとも上記転動
体と接触する部分がグラファイトからなる保持器とを備
えることを特徴とする転がり軸受。
1. A vehicle comprising: a raceway ring having at least a surface portion made of a material selected from cermet, stellite, and SUS630; a rolling element made of cermet; and a cage made of graphite at least in contact with the rolling element. Rolling bearing characterized.
【請求項2】 請求項1に記載の転がり軸受において、 上記軌道輪は、軌道面がステライトからなり、母材がS
US316またはSUS304からなることを特徴とす
る転がり軸受。
2. The rolling bearing according to claim 1, wherein the raceway surface of the race is made of stellite, and the base material is S.
A rolling bearing comprising US316 or SUS304.
【請求項3】 請求項1に記載の転がり軸受において、 上記軌道輪が、サーメットのみでできていることを特徴
とする転がり軸受。
3. The rolling bearing according to claim 1, wherein the race is made of only cermet.
【請求項4】 請求項1に記載の転がり軸受において、 上記保持器は、SUS304またはSUS316からな
る補強材で補強されていることを特徴とする転がり軸
受。
4. The rolling bearing according to claim 1, wherein the cage is reinforced with a reinforcing material made of SUS304 or SUS316.
JP2000086505A 2000-03-27 2000-03-27 Rolling bearing Expired - Fee Related JP4188536B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000086505A JP4188536B2 (en) 2000-03-27 2000-03-27 Rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000086505A JP4188536B2 (en) 2000-03-27 2000-03-27 Rolling bearing

Publications (2)

Publication Number Publication Date
JP2001271842A true JP2001271842A (en) 2001-10-05
JP4188536B2 JP4188536B2 (en) 2008-11-26

Family

ID=18602659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000086505A Expired - Fee Related JP4188536B2 (en) 2000-03-27 2000-03-27 Rolling bearing

Country Status (1)

Country Link
JP (1) JP4188536B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070910A1 (en) * 2001-03-02 2002-09-12 Nsk Ltd. Rolling device
JP2008138698A (en) * 2006-11-30 2008-06-19 Nsk Ltd Ball bearing cage
US20120027335A1 (en) * 2010-07-29 2012-02-02 Aktiebolaget Skf Bearing Assembly
WO2013143695A1 (en) * 2012-03-27 2013-10-03 Technische Universität Kaiserslautern Solid-film lubricated rolling bearing
US20170138399A1 (en) * 2015-11-18 2017-05-18 Schaeffler Technologies AG & Co. KG High speed two-piece deep groove ball bearing cage with integral lubricant reservoir
US9970484B2 (en) * 2013-09-11 2018-05-15 Northwest A & F University Curved trench ball bearing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH710410A1 (en) * 2014-11-26 2016-05-31 Fives Cryomec Ag Rotary pump for cryogenic fluids.
CN109114113B (en) * 2018-10-11 2019-10-22 宁波万丰轴承有限公司 A deep groove ball bearing

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070910A1 (en) * 2001-03-02 2002-09-12 Nsk Ltd. Rolling device
US6874942B2 (en) 2001-03-02 2005-04-05 Nsk Ltd. Rolling device
JP2008138698A (en) * 2006-11-30 2008-06-19 Nsk Ltd Ball bearing cage
US20120027335A1 (en) * 2010-07-29 2012-02-02 Aktiebolaget Skf Bearing Assembly
US8348514B2 (en) * 2010-07-29 2013-01-08 Aktiebolaget Skf Bearing assembly
WO2013143695A1 (en) * 2012-03-27 2013-10-03 Technische Universität Kaiserslautern Solid-film lubricated rolling bearing
US9970484B2 (en) * 2013-09-11 2018-05-15 Northwest A & F University Curved trench ball bearing
US20170138399A1 (en) * 2015-11-18 2017-05-18 Schaeffler Technologies AG & Co. KG High speed two-piece deep groove ball bearing cage with integral lubricant reservoir
US9765820B2 (en) * 2015-11-18 2017-09-19 Schaeffler Technologies AG & Co. KG High speed two-piece deep groove ball bearing cage with integral lubricant reservoir

Also Published As

Publication number Publication date
JP4188536B2 (en) 2008-11-26

Similar Documents

Publication Publication Date Title
RU2231695C2 (en) Anti-friction bearing provided with coat (versions)
US6290398B1 (en) Rolling bearing
JP3326912B2 (en) Rolling bearing
JP2001271842A (en) Rolling bearing
JPH06337016A (en) Corrosion resistant rolling bearing
US6530695B2 (en) Rolling bearing and method of making the same
CA2152990C (en) Rod end bearing for aircraft use
US20100027933A1 (en) Needle bearing
JP2008169939A (en) Rolling bearing for vacuum pump and vacuum pump using the same
TW451038B (en) Hybrid ball bearing with oblique contact
JP3047088B2 (en) Machine parts having rolling elements
JP2002155948A (en) Rolling bearing
JP2002227854A (en) Rolling bearing
JP2006046380A (en) Ball bearing
JPH08232963A (en) Abrasion resistance roller bearing
JPH0788855B2 (en) Rolling bearing
JPH0788854B2 (en) Rolling bearing
JPH0893773A (en) Bearing part
JP2599903Y2 (en) Rolling bearings used in molten metal
JP2004169723A (en) Rolling bearing
JP2010249215A (en) Rolling bearing for hydrogen atmosphere
JP3567497B2 (en) Rolling bearings used in molten metal
JPH1047359A (en) Rolling bearing
JPH11247863A (en) Multi-point contact ball bearing
JPS63303221A (en) Rolling bearing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050224

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20050721

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20050721

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050913

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20060228

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060303

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20060228

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20071016

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20071018

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20071217

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080115

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20080130

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20080130

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080314

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20080415

AA92 Notification of invalidation

Free format text: JAPANESE INTERMEDIATE CODE: A971092

Effective date: 20080507

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20080520

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20080619

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080722

A911 Transfer of reconsideration by examiner before appeal (zenchi)

Free format text: JAPANESE INTERMEDIATE CODE: A911

Effective date: 20080729

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080812

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080911

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110919

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120919

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130919

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees