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公开(公告)号：US20180187722A1
公开(公告)日：2018-07-05
申请号：US15736488
申请日：2016-06-02
Applicant: NTN CORPORATION
Inventor： Katsuaki SASAKI
CPC classification number: F16C33/3887 , F16C19/06 , F16C33/3868 , F16C33/427 , F16C2326/06 , F16C2361/61
Abstract: Provided is a retainer (7), including a pair of annular members (8, 8), the pair of annular members (8, 8) being coupled to each other so that semispherical bulging portions (9, 9) which are opposed to each other form pockets (11) configured to retain balls (6). The pockets (11) each include a ball-opposed surface (12) having a ball non-contact portion (14) that is recessed toward a side opposite to the ball side. The ball non-contact portion (14) is formed outside a predetermined region (A) of the ball-opposed surface (12), which includes an intersection (P) of a pitch circle (PCD) of the balls (6) and a straight line (L) extending in a radial direction through a central portion of the ball-opposed surface (12) in a circumferential direction, and has an end portion on a radially outer side which is opened in a radially outer surface (8a) of the annular member (8).
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公开(公告)号：US20150010256A1
公开(公告)日：2015-01-08
申请号：US14495447
申请日：2014-09-24
Applicant: NTN CORPORATION
Inventor： Katsuaki SASAKI , Takahiro WAKUDA
CPC classification number: F16C33/7826 , F16C19/06 , F16C33/586 , F16C33/726 , F16C33/7843
Abstract: A seal equipped bearing assembly includes a plurality of rolling elements interposed between opposite raceway surfaces defined in respective raceway rings; a sealing member to seal a bearing space delimited between the raceway rings; and a gap formation facilitating element defined in a seal contact face in the other of the raceway rings, the gap formation facilitating element being a projection provided in a circumferential portion of the seal contact face in the raceway ring. The gap formation facilitating element is configured to render the sealing member to be a non-contact seal or to contact so that the contact pressure is approximately zero when the bearing assembly is in a rotating state. The sealing member is provided with a suction preventing device for preventing the sealing member from being sucked onto the other of the raceway rings.
Abstract translation: 一种装有密封件的轴承组件包括多个滚动元件，其插入在限定在相应的滚道环中的相对的滚道表面之间; 用于密封限定在所述滚道环之间的轴承空间的密封构件; 以及间隙形成促进元件，限定在另一个滚道环中的密封接触面中，间隙形成促进元件是设置在滚道环中的密封接触面的周向部分中的突起。 间隙形成促进元件构造成使得密封构件为非接触密封或接触，使得当轴承组件处于旋转状态时接触压力近似为零。 密封构件设置有用于防止密封构件被吸入另一个滚道环的防吸漏装置。
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公开(公告)号：US20230296132A1
公开(公告)日：2023-09-21
申请号：US18021098
申请日：2021-08-06
Applicant: NTN CORPORATION
Inventor： Katsuaki SASAKI , Susumu MIYAIRI
CPC classification number: F16C19/06 , F16C33/418 , F16C33/664 , F16C33/76
Abstract: A ball bearing is provided which includes a cage circular annular portion and a seal member. The cage circular annular portion has a cage-side sliding contact surface axially opposed to the seal member and configured to come into sliding contact with the seal member. The seal member has a seal-side sliding contact surface configured to come into sliding contact with the cage-side sliding contact surface. A plurality of axial protrusions each having an axially convex circular arc shape in cross sections along a circumferential direction are formed on one of the cage-side sliding contact surface and the seal-side sliding contact surface at constant pitches in the circumferential direction.
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公开(公告)号：US20220373429A1
公开(公告)日：2022-11-24
申请号：US17765772
申请日：2020-09-28
Applicant: NTN Corporation
Inventor： Katsuaki SASAKI , Toru YAMAGUCHI
IPC: G01M13/04
Abstract: An evaluation test method for flaking caused by hydrogen embrittlement includes: preparing a rolling bearing having a first bearing ring, a second bearing ring, and a rolling element, the first bearing ring being a rotation ring including a first raceway surface, the second bearing ring being a stationary ring including a second raceway surface facing the first raceway surface, the rolling element being disposed between the first raceway surface and the second raceway surface; and applying a rotation around a central axis onto the first bearing ring in a state in which a load is applied between the first raceway surface and the second raceway surface through the rolling element. Each of the first bearing ring, the second bearing ring, and the rolling element is composed of a steel. The first raceway surface and the second raceway surface are always entirely immersed in lubricating oil during the rotation.
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Patent Agency Ranking
5.发明申请公开(公告)号：US20190351590A1
公开(公告)日：2019-11-21
申请号：US16479140
申请日：2017-10-17
Applicant: NTN CORPORATION , NAKANISHI METAL WORKS CO., LTD.
Inventor： Katsuaki SASAKI , Takahiro WAKUDA , Takashi KANEIKE
IPC: B29C43/18 , F16C33/78 , F16J15/3204 , B29C43/36
Abstract: The rolling bearing seal includes a core metal and rubber adhered to the core metal by vulcanization. The rubber includes: a seal lip portion having, over the entire circumference in the circumferential direction, a plurality of projections that extend inward in the radial direction from the inner diameter side of the core metal, and slides on a seal sliding surface of an inner ring of a rolling bearing; and an attachment portion that is attached to an outer ring of the rolling bearing. A compression vulcanization molding mold includes a female mold and a male mold. The female mold has a guide portion for positioning the core metal and a rugged shape forming the projections on the seal lip portion. The male mold has an inner-diameter-side burr groove and an outer-diameter-side burr groove and the shape of a radially outermost portion of the inner-diameter-side burr groove is formed in a circle.
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公开(公告)号：US20250027539A1
公开(公告)日：2025-01-23
申请号：US18712961
申请日：2022-11-21
Applicant: NTN CORPORATION
Inventor： Katsuaki SASAKI , Susumu MIYAIRI , Masato AKAHORI
Abstract: An outer surface rubber portion is formed to cover the entire axially outer surface of a metal core. An inner surface rubber portion is formed with a circular annular opening through which the axially inner surface of the metal core is exposed on the same circumference passing on the radially outer side of minute protrusions; and circular arc-shaped openings through which the axially inner surface of the metal core is exposed on the same circumference passing on the radially inner side of the minute protrusions.
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公开(公告)号：US20200011378A1
公开(公告)日：2020-01-09
申请号：US16490362
申请日：2018-03-01
Applicant: NTN CORPORATION
Inventor： Katsuaki SASAKI
Abstract: A rolling bearing including a cage is provided. The cage includes, on its outer peripheral surface, a plurality of ridges protruding radially outwardly, and circumferentially spaced apart from each other. The ridges extend in the axial direction or in an oblique direction or directions relative to the circumferential direction. The ridges are capable of coming into contact with the inner peripheral surface of the outer ring through lubricating oil.
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公开(公告)号：US20190219102A1
公开(公告)日：2019-07-18
申请号：US16330854
申请日：2017-09-05
Applicant: NTN CORPORATION
Inventor： Katsuaki SASAKI , Tomohiro SUGAI , Takahiro WAKUDA
IPC: F16C33/78
CPC classification number: F16C33/7823 , F16C19/06 , F16C33/7843 , F16C2240/70 , F16C2361/65 , F16J15/3204 , F16J15/324
Abstract: A sealed bearing includes an inner race; and seal members each including a seal lip made of rubber. Each seal lip includes a plurality of protrusions circumferentially spaced apart from each other, and kept in sliding contact with the inner race with fluid lubrication condition generated between the protrusions and the inner race. Each protrusion has a circular arc-shaped cross section along the circumferential direction, and the circular arc-shaped cross section has a radius of 0.4 mm or more and less than 9.0 mm.
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公开(公告)号：US20180045247A1
公开(公告)日：2018-02-15
申请号：US15556165
申请日：2016-03-08
Applicant: NTN CORPORATION
Inventor： Kazunori INAMASU , Yugo YOSHIMURA , Takahiro WAKUDA , Katsuaki SASAKI
CPC classification number: F16C33/7823 , F16C19/06 , F16C33/726 , F16C33/7826 , F16C33/7833 , F16C33/7856 , F16C2223/08 , F16C2300/02 , F16C2326/06 , F16J15/3408 , F16J15/3428
Abstract: A sealed bearing assembly includes seal members each including a seal lip formed with multiple protrusions, and arranged such that oil passages are formed between the seal lip and a seal sliding surface which slides circumferentially relative to the protrusions such that the oil passages communicate with the bearing internal space and the exterior of the bearing, and prevent passage of foreign objects having particle diameters larger than a predetermined value therethrough. The seal lip and the seal sliding surface are arranged such that when the bearing rotates, lubricating oil in the oil passages are pulled into the spaces between the seal lip and the seal sliding surface such that fluid lubricating condition is created between the seal lip and the seal sliding surface, due to the wedge effect.
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