公开(公告)号：US11624404B2

公开(公告)日：2023-04-11

申请号：US17193781

申请日：2021-03-05

申请人： Seiko Instruments Inc.

发明人： Takayuki Kosaka ,  Takayuki Satodate ,  Keisuke Abo

IPC分类号： F16C19/06 ,  F16C33/66 ,  F16C33/78

摘要： A rolling bearing capable of achieving reduction in torque is provided. The rolling bearing includes an inner ring and an outer ring disposed coaxially with each other, a rolling element disposed between the inner ring and the outer ring, a seal member configured to cover an area between the inner ring and the outer ring from an outside in an axial direction, and filled grease disposed between the rolling element and the seal member. The filled grease includes a first ring-like part which extends to form a circumferential shape centering on a common axis of the inner ring and the outer ring, and which has contact with one of the inner ring and the outer ring, and a second ring-like part which extends to form a circumferential shape centering on the common axis, which is connected to the first ring-like part at an outer side in the axial direction, and which has contact with the seal member.

公开(公告)号：US10968954B2

公开(公告)日：2021-04-06

申请号：US15640955

申请日：2017-07-03

申请人： SEIKO INSTRUMENTS INC.

发明人： Akihiro Iino ,  Takayuki Kosaka ,  Misato Hanaoka ,  Hisaya Nakamura ,  Koji Ishii

IPC分类号： F16C33/66 ,  C10M169/02 ,  F16C33/41 ,  C10M101/02 ,  C10M105/04 ,  F16C19/54 ,  C10N20/02 ,  C10N30/02 ,  C10N30/06 ,  C10N40/02 ,  C10N50/10 ,  C10M115/08 ,  G11B5/48

摘要： A bearing grease includes a base oil and a thickener, and the base oil includes mineral oil and poly-α-olefin. The poly-α-olefin may be a blend of poly-α-olefin having a kinetic viscosity higher than that of the mineral oil and poly-α-olefin having a kinetic viscosity equal to or lower than that of the mineral oil, and the kinetic viscosity of the base oil at 40° C. is in a range of 40 through 90 mm2/s. The amount of the poly-α-olefin by mass in the base oil is greater than the amount of the mineral oil by mass in the base oil. The worked penetration of the grease is in a range of 200 through 250. The grease reduces flying grease and outgas and has superior low-temperature characteristics.

公开(公告)号：US09934799B2

公开(公告)日：2018-04-03

申请号：US15366342

申请日：2016-12-01

申请人： SEIKO INSTRUMENTS INC.

发明人： Akihiro Iino ,  Masami Oaku ,  Takayuki Kosaka

IPC分类号： G11B5/48 ,  F16C19/06 ,  F16C19/16 ,  F16C33/38 ,  F16C33/60 ,  F16C33/78 ,  F16C43/06

CPC分类号： G11B5/4813 ,  F16C19/06 ,  F16C19/163 ,  F16C19/166 ,  F16C33/3806 ,  F16C33/416 ,  F16C33/60 ,  F16C33/7806 ,  F16C33/7886 ,  F16C43/065 ,  F16C2370/12

摘要： A bearing device includes a shaft and a roller bearing externally inserted over the shaft. The roller bearing includes an inner ring disposed coaxially with a center axis of the shaft, an outer ring surrounding the inner ring from an outer side in a radial direction, and a plurality of rolling elements held between the inner ring and the outer ring to be capable of rolling. The inner ring is divided into one half section and the other half section. The one half section contacts the rolling elements from the one side toward the other side in the axial direction, and the other half section contacts the rolling elements from the other side toward the one side in the axial direction. Preloads are applied to the two half sections in directions in which the one half section and the other half section are brought close to each other.