公开(公告)号：US20200291999A1

公开(公告)日：2020-09-17

申请号：US16084180

申请日：2017-03-08

Applicant: NTN CORPORATION

Inventor： Kohei MIZUTA ,  Chikara OHKI

IPC: F16C33/64 ,  B21D22/20 ,  B21D24/16 ,  B21D28/02 ,  B21D53/10 ,  C21D1/18 ,  C21D1/76 ,  C21D9/40 ,  F16C19/36 ,  F16C19/44 ,  B21J1/06 ,  B21J5/08

Abstract: The method includes: the step of preparing a steel material and a work portion; the step of placing the steel material on the work portion; and the steps of obtaining the rolling bearing ring by heating the steel material on the work portion to a temperature equal to or higher than an A1 transformation point, thereafter punching a part of the steel material into a ring shape, and thereafter quenching the steel material in a ring shape on the work portion. In the step of obtaining the rolling bearing ring, heating and punching are performed in the state where oxidation of the steel material is suppressed, and in the state where tensile force is applied between the first portion and the second portion in the steel material.

公开(公告)号：US20160153495A1

公开(公告)日：2016-06-02

申请号：US14896886

申请日：2014-06-05

Applicant: NTN CORPORATION

Inventor： Takashi UENO

IPC: F16C33/62 ,  C22C38/18 ,  C23C8/32 ,  C22C38/02 ,  C22C38/00 ,  C21D9/40 ,  F16C19/36 ,  C22C38/04

CPC classification number: F16C33/62 ,  C21D9/36 ,  C21D9/40 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/18 ,  C22C38/34 ,  C22C38/40 ,  C22C38/44 ,  C23C8/32 ,  F16C19/364 ,  F16C19/542 ,  F16C19/547 ,  F16C33/56 ,  F16C2204/64 ,  F16C2204/66 ,  F16C2204/74

Abstract: A tapered roller bearing includes an outer ring, an inner ring, a plurality of tapered rollers, and a holder. A nitrogen concentration in a surface layer portion under a contact surface is 0.3 mass % or more. The holder includes a small annular portion, a large annular portion, and a plurality of column portions. A pocket has a trapezoidal shape in which a portion housing a small diameter side of the tapered roller is located on a reduced width side while a portion housing a large diameter side of the tapered roller is located on an increased width side. Each of the column portions on the reduced width side of the pocket is provided with a cutout.

Abstract translation: 圆锥滚子轴承包括外圈，内圈，多个圆锥滚子和支架。 接触面下表面层部的氮浓度为0.3质量％以上。 保持器包括小的​​环形部分，大的环形部分和多个柱部分。 口袋具有梯形形状，其中容纳圆锥滚子的小直径侧的部分位于缩小的宽度侧，而容纳圆锥滚子的大直径侧的部分位于增宽的宽度侧。 在口袋的减小宽度侧的每个柱部分设置有切口。

公开(公告)号：US20180347623A1

公开(公告)日：2018-12-06

申请号：US15771763

申请日：2016-10-12

Applicant: NTN CORPORATION

Inventor： Michio HORI ,  Hideto TORISAWA ,  Hiroshi YUKI ,  Chikara OHKI ,  Kazuhiro YAGITA

IPC: F16C19/38 ,  C21D9/40 ,  C21D1/42 ,  C21D6/00 ,  C22C38/22 ,  C22C38/04 ,  C22C38/02 ,  C21D1/10 ,  C21D1/28 ,  F16C33/62 ,  F16C33/64

Abstract: There is prepared a formed body constituted of steel and having an outer circumferential surface having an annular groove having a bottom surface to serve as a raceway surface of the bearing ring. In the step of forming a heated region, the formed body is induction heated to form a heated region including the bottom surface of the groove and heated to a temperature of at least an A1 point. In the cooling step, the whole of the heated region is simultaneously cooled to a temperature of not more than an Ms point. The step of retaining the formed body in a state in which heating is stopped is performed after the step of forming a heated region before the step of cooling. In the step of retaining, dispersion in temperature in the heated region in the circumferential direction is suppressed to not more than 20° C.

公开(公告)号：US12234912B2

公开(公告)日：2025-02-25

申请号：US18020315

申请日：2021-09-14

Applicant: NTN CORPORATION

Inventor： Tsukasa Watanabe

IPC: F16C19/18 ,  B60B27/00 ,  F16C33/78 ,  F16J15/32 ,  F16J15/3232 ,  F16J15/3256 ,  F16J15/3276 ,  F16J15/40

Abstract: Provided is a bearing device for a vehicle wheel comprising: an outer-side seal that is resistant to deterioration over time and can prevent foreign matter. This bearing device for a vehicle wheel comprises an outer-side seal member 7 that closes an outer-side opening end of an annular space formed by an outer ring 2 and a hub ring 3. The outer-side seal member 7 including a core metal 8 which is fitted to the outer ring 2, a seal member 10 which is joined to the core metal 8, and a metal ring 9 which is fitted to the hub ring 3 and with which the seal member 10 is in sliding contact. An annular space S is provided between the metal ring 9 and the hub ring 3, and the annular space S being filled with a sealing material 20.

公开(公告)号：US12234634B2

公开(公告)日：2025-02-25

申请号：US17488552

申请日：2021-09-29

Applicant: NTN CORPORATION

Inventor： Mitsuru Akagawa ,  Ryosuke Karasawa ,  Tomohisa Okuno ,  Kaname Nishimura

IPC: E04B1/348 ,  H02S10/12 ,  H02S10/40 ,  H02S20/24 ,  H02J7/35

Abstract: A portable facility including: a power generation unit and a function unit, wherein the power generation unit includes a transportable first housing, at least one power generation device attached to the first housing which includes a top wall, a bottom wall, and a surrounding wall, the at least one power generation device being one or more of a wind power generation device, a solar power generation device, and a hydraulic power generation device, and the function unit includes a transportable second housing and an electric apparatus disposed inside the second housing and configured to be powered by the power generation unit to operate, the second housing including a top wall, a bottom wall, and a surrounding wall.

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

IPC: F16C33/78 ,  F16C33/46

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.

公开(公告)号：US12203510B2

公开(公告)日：2025-01-21

申请号：US18383285

申请日：2023-10-24

Applicant: NTN Corporation

Inventor： Masazumi Kobayashi ,  Tomoshige Kobayashi

IPC: F16D3/224 ,  F16D3/2245 ,  F16D3/227 ,  F16D3/223

Abstract: A plunging type constant velocity universal joint 1 for a propeller shaft includes an outer joint member 2, an inner joint member 3, eight torque transmidetting balls 4, and a cage 5. A center of curvature O1 of a spherical outer surface 12 and a center of curvature O2 of a spherical inner surface 13 of the cage 5 each have an equal and axially opposite offset (f) with respect to a center O3 of pockets 5a. A ratio f/PCDBALL between the offset (f) of the cage 5 and a pitch circle diameter (PCDBALL) of the torque transmitting balls 4 is 0.07 or more and 0.09 or less.

公开(公告)号：US12203062B2

公开(公告)日：2025-01-21

申请号：US16760087

申请日：2018-11-01

Applicant: OSAKA UNIVERSITY ,  NTN CORPORATION

Inventor： Mitsuru Akashi ,  Takami Akagi ,  Masaki Egami ,  Akihiro Yamanaka ,  Haruka Nakamura ,  Toukokuryuu Ai

IPC: C12N5/00 ,  B01L3/00 ,  C12M1/00 ,  C12M1/12 ,  C12M1/26 ,  C12M1/32

Abstract: The present invention is to provide a cell chip and a three-dimensional tissue chip and a production method therefor such that even when a highly viscous cell-containing solution is a material, the highly safe and reproducible cell chip or three-dimensional tissue chip with a desired application volume can be produced within a short time and in a large quantity so as to have a desired cell density and exhibit high cell viability.

公开(公告)号：US20250010467A1

公开(公告)日：2025-01-09

申请号：US18896151

申请日：2024-09-25

Applicant: NTN CORPORATION

Inventor： Yuki SHIMURA ,  Masaki KAGAMI ,  Kota FURUHASHI

IPC: B25J9/16

Abstract: A control device controls an attitude control actuator by means of which a distal end member located on a link actuation device can be moved. A parallel linkage mechanism includes a proximal end-side link hub, a distal end-side link hub, and three linkages via which the distal end-side link hub is coupled to the proximal end-side link hub in such a manner that allows the attitude of the distal end-side link hub to change relative to the proximal end-side link hub. The control device includes a parameter switcher which switches control parameters to adjust the jerk of the attitude control actuator or the distal end member based on a load applied to the distal end member. The parameter switcher can switch more than one control parameter including at least one of the filter time constant of a moving average filter or a model following control gain.

公开(公告)号：US12129896B2

公开(公告)日：2024-10-29

申请号：US17621346

申请日：2020-06-18

Applicant: NTN CORPORATION

Inventor： Takuya Katou ,  Kenji Terada ,  Yasunori Kawasaki

IPC: F16D3/2245 ,  B60K17/22

CPC classification number: F16D3/2245 ,  B60K17/22

Abstract: A power transmission mechanism (2) includes left and right drive shafts (3L, 3R) that transmit rotational torque from a drive source to drive wheels provided on left and right sides of a vehicle. In the right drive shaft (3R) and the left drive shaft (3L), the numbers of rolling elements (23, 33) included in plunging type constant velocity universal joints (6L, 6R) are different from each other.