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1. WO2020090572 - BALL BEARING

Publication Number WO/2020/090572
Publication Date 07.05.2020
International Application No. PCT/JP2019/041468
International Filing Date 23.10.2019
IPC
F16C 33/38 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; 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
33Parts of bearings; Special methods for making bearings or parts thereof
30Parts of ball or roller bearings
38Ball cages
F16C 19/16 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; 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
19Bearings with rolling contact, for exclusively rotary movement
02with bearing balls essentially of the same size in one or more circular rows
14for both radial and axial load
16with a single row of balls
F16C 33/44 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; 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
33Parts of bearings; Special methods for making bearings or parts thereof
30Parts of ball or roller bearings
38Ball cages
44Selection of substances
F16C 33/66 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
CSHAFTS; 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
33Parts of bearings; Special methods for making bearings or parts thereof
30Parts of ball or roller bearings
66Special parts or details in view of lubrication
Applicants
  • NTN株式会社 NTN CORPORATION [JP]/[JP]
Inventors
  • 北野 誉幸 KITANO Takayuki
Agents
  • 鎌田 直也 KAMADA Naoya
  • 鎌田 文二 KAMADA Bunji
  • 中谷 弥一郎 NAKATANI Yaichiro
Priority Data
2018-20277129.10.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) BALL BEARING
(FR) ROULEMENT À BILLES
(JA) 玉軸受
Abstract
(EN)
In the present invention, a recessed section (42a) reaching a radially outer position relative to a pitch circle (C) of balls (3) is formed in each column part (42) of a holder (4) of an outer ring guide system, on the side facing an inner ring (2), and one point on a portion where the bottom of the recessed section (42a) of the column part (42) is formed is configured to be brought into contact with the corresponding ball (3) on the radially outer side of the pitch circle (C) of the balls (3). Accordingly, a greater amount of lubricant than in conventional ones can be held in the recessed section (42a) of each column part (42) of the holder (4), and the occurrence of an oil film shortage between the holder (4) and an outer ring (1) can be assuredly reduced. Furthermore, during an operation of a bearing, since the holder (4) rotates while receiving force from the balls (3) and thus being constantly pressed toward the inner circumferential surface of the outer ring (1) serving as a guide surface, the behavior of the holder (4) is stable and less likely to cause vibration even in a high-speed rotation range.
(FR)
Dans la présente invention, une section évidée (42a) atteignant une position radialement externe par rapport à un cercle primitif (C) de billes (3) est formée dans chaque partie de colonne (42) d'un support (4) d'un système de guidage de bague externe, sur le côté faisant face à une bague interne (2), et un point sur une partie où le fond de la section évidée (42a) de la partie colonne (42) est formé est conçu pour être mis en contact avec la bille correspondante (3) sur le côté radialement externe du cercle primitif (C) des billes (3). Par conséquent, une plus grande quantité de lubrifiant que dans des éléments classiques peut être maintenue dans la section évidée (42a) de chaque partie de colonne (42) du support (4), et la survenue d'un manque de film d'huile entre le support (4) et une bague externe (1) peut être réduite de manière sûre. En outre, pendant le fonctionnement d'un roulement, étant donné que le support (4) tourne tout en recevant la force des billes (3) et est ainsi constamment pressé vers la surface circonférentielle interne de la bague externe (1) servant de surface de guidage, le comportement du support (4) est stable et moins susceptible de provoquer une vibration même dans une plage de rotation à grande vitesse.
(JA)
外輪案内形式の保持器(4)の各柱部(42)の内輪(2)と対向する側に玉(3)のピッチ円(C)よりも径方向外側の位置まで入り込む凹部(42a)を形成し、各柱部(42)の凹部(42a)の底部が形成された部位の1か所が、玉(3)のピッチ円(C)よりも径方向外側で玉(3)と接触するようにした。これにより、保持器(4)の各柱部(42)の凹部(42a)に従来よりも多くの潤滑剤を保持でき、保持器(4)と外輪(1)との間の油膜切れの発生を確実に抑えることができる。また、軸受運転中は、保持器(4)が玉(3)から受ける力によって常に案内面である外輪(1)の内周面に向かって押される状態で回転するので、高速回転域でも保持器(4)の挙動が安定して振動を生じにくいものとなっている。
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