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1. (WO2017099071) SHAFT FOR BEARING, AND BEARING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/099071 International Application No.: PCT/JP2016/086215
Publication Date: 15.06.2017 International Filing Date: 06.12.2016
IPC:
F16C 3/02 (2006.01) ,F16C 33/62 (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
3
Shafts; Axles; Cranks; Eccentrics
02
Shafts; Axles
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
62
Selection of substances
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:
大野 泰延 OHNO, Yasunobu; 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:
2015-24027709.12.2015JP
2015-24027809.12.2015JP
Title (EN) SHAFT FOR BEARING, AND BEARING
(FR) ARBRE POUR PALIER, ET PALIER
(JA) 軸受用軸及び軸受
Abstract:
(EN) The present invention pertains to a shaft (1) for a bearing provided with an outer peripheral surface that includes a track surface (side surface) with which rolling elements (2) are in contact, the shaft (1) for a bearing being configured from steel containing at least 0.7% carbon, and having a nitrogen-rich layer (1a) formed on the track surface. The absolute value of the compressive residual stress in the surface of the nitrogen-rich layer (1a) (the surface of a hardened layer (1b) formed by shot peening in the side surface of the shaft (1) for a bearing) is 600-1700 MPa. The present invention thereby makes it possible to increase the life of a shaft for a bearing.
(FR) La présente invention concerne un arbre (1) pour un palier, qui comporte une surface périphérique externe qui comprend une surface de piste (surface latérale) avec laquelle des éléments de palier (2) sont en contact, l'arbre (1) pour un palier étant conçu en un acier contenant au moins 0,7 % de carbone, et ayant une couche riche en azote (1a) formée sur la surface de piste. La valeur absolue de la contrainte de compression résiduelle dans la surface de la couche riche en azote (1a) (la surface d'une couche durcie (1b) formée par grenaillage dans la surface latérale de l'arbre (1) pour un palier) est de 600 à 1700 MPa. La présente invention rend ainsi possible d'accroître la durée de vie d'un arbre pour un palier.
(JA) 本発明は、転動体(2)が接触する軌道面(側面)を含む外周面を備え、炭素を0.7%以上含有する鋼により構成され、軌道面に、窒素富化層(1a)が形成されている軸受用軸(1)に関する。また、窒素富化層(1a)の表面(軸受用軸(1)の側面における、ショットピーニングにより形成された硬化層(1b)の表面)における圧縮残留応力の絶対値は、600MPa以上1700MPa以下とされている。本発明は、これにより、長寿命化を図ることが可能となる。
front page image
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, KE, KG, 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 Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)
Also published as:
CN108368869DE112016005662KR1020180091021US20180363694