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1. (WO2018181412) TAPERED ROLLER BEARING
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Pub. No.: WO/2018/181412 International Application No.: PCT/JP2018/012617
Publication Date: 04.10.2018 International Filing Date: 28.03.2018
IPC:
F16C 19/36 (2006.01) ,C22C 38/00 (2006.01) ,C22C 38/04 (2006.01) ,C22C 38/18 (2006.01) ,F16C 33/36 (2006.01) ,F16C 33/58 (2006.01) ,F16C 33/64 (2006.01) ,C21D 1/06 (2006.01) ,C21D 9/40 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
19
Bearings with rolling contact, for exclusively rotary movement
22
with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
34
for both radial and axial load
36
with a single row of rollers
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
04
containing manganese
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
38
Ferrous alloys, e.g. steel alloys
18
containing chromium
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33
Parts of bearings; Special methods for making bearings or parts thereof
30
Parts of ball or roller bearings
34
Rollers; Needles
36
with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33
Parts of bearings; Special methods for making bearings or parts thereof
30
Parts of ball or roller bearings
58
Raceways; Race rings
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33
Parts of bearings; Special methods for making bearings or parts thereof
30
Parts of ball or roller bearings
58
Raceways; Race rings
64
Special methods of manufacture
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
1
General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering
06
Surface hardening
C CHEMISTRY; METALLURGY
21
METALLURGY OF IRON
D
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
9
Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor
40
for rings; for bearing races
Applicants:
NTN株式会社 NTN CORPORATION [JP/JP]; 大阪府大阪市西区京町堀1丁目3番17号 3-17, Kyomachibori 1-chome, Nishi-ku, Osaka-shi, Osaka 5500003, JP
Inventors:
川井 崇 KAWAI, Takashi; JP
Agent:
特許業務法人深見特許事務所 FUKAMI PATENT OFFICE, P.C.; 大阪府大阪市北区中之島三丁目2番4号 中之島フェスティバルタワー・ウエスト Nakanoshima Festival Tower West, 2-4, Nakanoshima 3-chome, Kita-ku, Osaka-shi, Osaka 5300005, JP
Priority Data:
2017-06334528.03.2017JP
2017-06335428.03.2017JP
2017-06336028.03.2017JP
2017-06397228.03.2017JP
Title (EN) TAPERED ROLLER BEARING
(FR) ROULEMENT À ROULEAUX CONIQUE
(JA) 円錐ころ軸受
Abstract:
(EN) Provided is a tapered roller bearing that has a long service life and high durability. The tapered roller bearing is provided with an outer ring, an inner ring, and a plurality or rollers (1012) that are tapered rollers. The outer ring has an outer ring raceway surface in the inner circumferential surface thereof. The inner ring has an inner ring raceway surface in the outer circumferential surface thereof and is arranged inside the outer ring. The plurality of rollers (1012) are arranged between the outer ring raceway surface and the inner ring raceway surface and comprise a rolling surface that is in contact with the outer ring raceway surface and the inner ring raceway surface. At least one of the outer ring, the inner ring, and the plurality of rollers comprises a nitrogen-enriched layer (1012B) formed on the outer ring raceway surface, the inner ring raceway surface, or the surface layer of the rolling surfaces. The prior austenite grain size in the nitrogen-enriched layer (1012B) by grain size number according to the JIS standard is 10 or more. The distance T1 from the outermost surface of the surface layer to a bottom section of the nitrogen-enriched layer (1012B) is 0.2 mm or more. Logarithmic crowning (1022A) is formed on the rolling surfaces of the rollers (1012).
(FR) L'invention concerne un roulement à rouleaux conique qui a une longue durée de vie et une durabilité élevée. Le roulement à rouleaux conique est pourvu d'une bague externe, d'une bague interne et d'une pluralité de rouleaux (1012) qui sont des rouleaux coniques. La bague extérieure comporte une surface de trajet de roulement de bague externe sur sa surface périphérique interne. La bague interne comporte une surface de trajet de roulement de bague interne dans sa surface circonférentielle externe et est disposée à l'intérieur de la bague externe. La pluralité de rouleaux (1012) sont agencés entre la surface de trajet de roulement de bague externe et la surface de trajet de roulement de bague interne et comprennent une surface de roulement qui est en contact avec la surface de trajet de roulement de bague externe et la surface de trajet de roulement de bague interne. La bague externe, la bague interne et/ou la pluralité de rouleaux comprennent une couche enrichie en azote (1012B) formée sur la surface de trajet de roulement de bague externe, la surface de trajet de roulement de bague interne, ou la couche de surface des surfaces de roulement. La taille de grain d'austénite antérieure dans la couche enrichie en azote (1012B) par numéro de taille de grain selon la norme JIS est de 10 ou plus. La distance T1 de la surface la plus extérieure de la couche de surface à une section inférieure de la couche enrichie en azote (1012B) est de 0,2 mm ou plus. Un bombement logarithmique (1022A) est formé sur les surfaces de roulement des rouleaux (1012).
(JA) 長寿命かつ高い耐久性を有する円錐ころ軸受を提供する。円錐ころ軸受は、外輪と内輪と複数の円錐ころであるころ(1012)とを備える。外輪は、内周面において外輪軌道面を有する。内輪は、外周面において内輪軌道面を有し、外輪の内側に配置される。複数のころ(1012)は、外輪軌道面と内輪軌道面との間に配列され、外輪軌道面および内輪軌道面と接触する転動面を有する。外輪、内輪および複数のころのうちの少なくともいずれか1つは、外輪軌道面、内輪軌道面または転動面の表面層に形成された窒素富化層(1012B)を含む。窒素富化層(1012B)における旧オーステナイト結晶粒径はJIS規格の粒度番号が10以上である。表面層の最表面から窒素富化層(1012B)の底部までの距離T1は0.2mm以上である。ころ(1012)の転動面には対数クラウニング(1022A)が形成されている。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)