公开(公告)号：US20140321789A1

公开(公告)日：2014-10-30

申请号：US14363560

申请日：2012-12-04

Applicant: NTN CORPORATION

Inventor： Daisuke Sato ,  Chikara Ohki ,  Takashi Ueno ,  Yasutaka Kusumi

IPC: F16C33/64 ,  C23C8/80 ,  C23C8/32 ,  F16C33/36 ,  F16C33/62

CPC classification number: C23C8/32 ,  C21D9/40 ,  C21D2211/001 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C23C8/26 ,  C23C8/80 ,  F16C19/06 ,  F16C19/364 ,  F16C33/32 ,  F16C33/34 ,  F16C33/366 ,  F16C33/585 ,  F16C33/62 ,  F16C33/64 ,  F16C2204/66 ,  F16C2240/50 ,  F16C2240/54 ,  F16C2240/90 ,  F16C2361/61

Abstract: An outer ring, an inner ring and a ball are each constituted of steel containing at least 0.60 mass % and not more than 1.50 mass % of carbon, at least 0.15 mass % and not more than 2.50 mass % of silicon, at least 0.30 mass % and not more than 1.50 mass % of manganese, and at least 0.20 mass % and not more than 2.00 mass % of chromium with the rest consisting of an impurity. A nitrogen concentration in surface layer portions is at least 0.3 mass %. An average quantity of residual austenite as a whole in each of the outer ring, the inner ring and the ball is not more than 20 volume %.

Abstract translation: 外圈，内圈和球都由含有至少0.60质量％且不多于1.50质量％的碳，至少0.15质量％至不多于2.50质量％的硅，至少0.30质量％ ％以上且1.50质量％以下，铬至少0.20质量％以上且2.00质量％以下，其余由杂质构成。 表层部的氮浓度为0.3质量％以上。 每个外圈，内圈和球体中的残余奥氏体的平均量整体不大于20体积％。

公开(公告)号：US20180095008A1

公开(公告)日：2018-04-05

申请号：US15815244

申请日：2017-11-16

Applicant: NTN Corporation

Inventor： Yasutaka Kusumi ,  Yuichiro Noro ,  Hiroya Kato ,  Kentaro Nishikawa

IPC: G01M17/013 ,  G01L5/00

CPC classification number: G01M17/013 ,  B60B3/16 ,  B60B11/06 ,  B60B2900/325 ,  B60B2900/3316 ,  B60R16/027 ,  G01L5/00 ,  G01M17/007

Abstract: Provided is a device for determining a wheel fastening state that allows a wheel fastening state to be monitored during running. The device includes a sensor unit (3) that is attachable to and detachable from a wheel fastening part, an information terminal (4) that is an in-vehicle device (4A) or a portable terminal (4B), and a server (30). The terminal (4) includes a measurement instruction module (23) to read vehicle state data from a control and communication system (5) of a vehicle and send an instruction for to measurement to the sensor unit (3) at determined timing. The server (30) includes a first information processing module (32) configured to determine an abnormality of a fastening state of the wheel fastening part by comparing the measurement data with accumulated data that is measured under the same condition and stored in the past.

公开(公告)号：US10408709B2

公开(公告)日：2019-09-10

申请号：US15815244

申请日：2017-11-16

Applicant: NTN CORPORATION

Inventor： Yasutaka Kusumi ,  Yuichiro Noro ,  Hiroya Kato ,  Kentaro Nishikawa

IPC: G01M17/00 ,  G01M17/013 ,  B60B3/16 ,  G01M17/007 ,  G01L5/00 ,  B60R16/027

Abstract: Provided is a device for determining a wheel fastening state that allows a wheel fastening state to be monitored during running. The device includes a sensor unit (3) that is attachable to and detachable from a wheel fastening part, an information terminal (4) that is an in-vehicle device (4A) or a portable terminal (4B), and a server (30). The terminal (4) includes a measurement instruction module (23) to read vehicle state data from a control and communication system (5) of a vehicle and send an instruction for to measurement to the sensor unit (3) at determined timing. The server (30) includes a first information processing module (32) configured to determine an abnormality of a fastening state of the wheel fastening part by comparing the measurement data with accumulated data that is measured under the same condition and stored in the past.