公开(公告)号：US20210269069A1

公开(公告)日：2021-09-02

申请号：US17258268

申请日：2019-07-24

Applicant: NIPPON STEEL CORPORATION

Inventor： Shotaro KADOKAWA ,  Kenji IMANISHI ,  Hiroshi NOGAMI

IPC: B61H7/08

Abstract: An eddy-current rail brake device includes a row of magnets, a supporting member, a case, and a lifting device. The row of magnets includes a plurality of permanent magnets that are arranged in a traveling direction of a railroad car. To the supporting member, the row of magnets is mounted. The supporting member has magnetism. The case houses the row of magnets and the supporting member and includes a bottom portion that faces the row of magnets and is non-magnetic. The lifting device raises and lowers the supporting member inside the case while the row of magnets is kept facing the bottom portion. The eddy-current rail brake device can prevent or reduce adhesion of a foreign object and can be reduced in size in a right-left direction.

公开(公告)号：US20200067397A1

公开(公告)日：2020-02-27

申请号：US16466105

申请日：2017-10-03

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroshi NOGAMI ,  Kenji IMANISHI ,  Yasutaka NOGUCHI ,  Hiroyuki YAMAGUCHI ,  Shotaro KADOKAWA ,  Takuya FUJITA

IPC: H02K49/10 ,  H02K9/22

Abstract: A retarder includes a rotor, a plurality of fins, a plurality of permanent magnets, a switching mechanism, a first cover, a second cover, and a cover-switching mechanism. The fins are provided on an outer peripheral surface of the rotor and inclined with respect to a rotation direction of the rotor. The magnets are arranged inside the rotor. The first cover faces an end face of the rotor and includes a plurality of holes. The second cover protrudes from an outer circumferential edge of the first cover toward a rotor side. The cover-switching mechanism opens the holes in the braking state and closes the holes in the non-braking state. The first cover is disposed on a side on which a leading end portion of each fin is present. The retarder achieves suppressing windage and ensuring a heat dissipation performance.

公开(公告)号：US20200023424A1

公开(公告)日：2020-01-23

申请号：US16498168

申请日：2018-04-03

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenji TAMURA ,  Kenji IMANISHI ,  Sam Soo HWANG ,  Kunihiro YABUNO ,  Kunihiro YOSHIDA ,  Koichiro ISHIHARA

IPC: B21J5/02 ,  B21K1/12

Abstract: In a pressing step, a first forged product is pressed by a first die, and thereby, a second forged product including a rough flange having a thickness-changing portion is produced. The thickness-changing portion includes a front part protruding frontward from a side of a rough web part and a rear part protruding rearward from the side of the rough web part. Each of the front part and the rear part includes a first part, and a second part that is thicker than the first part and is located farther from the rough web part than the first part. In the pressing step, at least a part of the rough flange that is above or below the web part (thick part) is pressed by the first die, whereby the material of the first forged product in the part is caused to flow frontward and rearward, and the thickness-changing portion is formed.

公开(公告)号：US20190393764A1

公开(公告)日：2019-12-26

申请号：US16562689

申请日：2019-09-06

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenji IMANISHI ,  Hiroyuki YAMAGUCHI ,  Shotaro KADOKAWA ,  Takuya FUJITA ,  Hiroshi NOGAMI

IPC: H02K49/10 ,  H02K1/14 ,  H02K1/17 ,  H02K3/18 ,  H02K7/104

Abstract: An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

公开(公告)号：US20230089505A1

公开(公告)日：2023-03-23

申请号：US17904449

申请日：2021-02-10

Applicant: NIPPON STEEL CORPORATION

Inventor： Yasutaka NOGUCHI ,  Hiroshi NOGAMI ,  Kenji IMANISHI ,  Takuya FUJITA ,  Yozo OKUDA

IPC: H02K49/04

Abstract: An eddy current deceleration device includes a rotor and a stator. The rotor includes a hub, a rotor body, and a spoke. The spoke has neutral axes. The first neutral axis is a neutral axis when the spoke is bent in a circumferential direction of the rotor body. The first neutral axis is positioned forward in a rotating direction of the rotor with respect to a center line of the spoke in the circumferential direction. The second neutral axis is a neutral axis when the spoke is bent in an axial direction of the rotor body. The second neutral axis is positioned on a rotor body side with respect to a center line of the spoke in the axial direction.

公开(公告)号：US20210363771A1

公开(公告)日：2021-11-25

申请号：US16760508

申请日：2018-11-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroshi NOGAMI ,  Kenji IMANISHI ,  Yasutaka NOGUCHI ,  Ryohsuke MASUI ,  Kumpei SANO

IPC: E04H9/02 ,  F16F15/03 ,  F16F6/00

Abstract: An eddy current damper includes a magnet holding member, a first permanent magnet having a thickness (H1), a second permanent magnet having a thickness (H1), a conductive member, a ball nut, a screw shaft, and a copper layer having a thickness (H2). The second permanent magnet is adjacent to the first permanent magnets with a gap therebetween in the circumferential direction of the magnet holding member. The ball nut is fixed to the magnet holding member or the conductive member. The copper layer is fixed to the conductive member and is opposed to the first permanent magnet and the second permanent magnet with a gap therebetween. The thickness (H1) and the thickness (H2) satisfy, with respect to a distance (R1) between a central axis of the screw shaft and the center of gravity of the first permanent magnet: 0.018≤H1/R1≤0.060, and 0.0013≤H2/R1≤0.0065.

公开(公告)号：US20200086378A1

公开(公告)日：2020-03-19

申请号：US16470002

申请日：2017-10-17

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenji TAMURA ,  Junichi OKUBO ,  Kenji IMANISHI ,  Kunihiro YABUNO ,  Sam Soo HWANG ,  Sho TAKAMOTO ,  Tadanao ISHII ,  Koichiro ISHIHARA

IPC: B21K1/08 ,  F16C3/08

Abstract: A production method includes a forging step, a flash-trimming step, and a pressing step. In the forging step, a finish-forged product with flash is formed by an upper forging, die and a lower forging die. In the forging step, an excess portion is formed on at least one crankarm which is connected to a first or third pin, in a portion near the first or third pin, on an outer periphery of a lateral part near the upper forging die, such that the excess portion protrudes from the outer periphery. In the pressing step, the excess portion is pressed by an upper die such that the excess portion bulges toward a journal. This method allows production of a forged crankshaft with a reduced weight and a sufficient rigidity in a simple facility.

公开(公告)号：US20200039291A1

公开(公告)日：2020-02-06

申请号：US16499454

申请日：2018-04-03

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenji TAMURA ,  Kenji IMANISHI ,  Sam Soo HWANG ,  Kunihiro YABUNO ,  Kunihiro YOSHIDA ,  Koichiro ISHIHARA

IPC: B60B35/06 ,  B21K1/12 ,  B21J5/06

Abstract: The production method disclosed is a method for producing a front axle beam. The production method includes a die forging step and a bending step. The die forging step is a step of forging a steel material with dies to produce a forged product including a rough web part, which is to be formed into a web part, and four plate-shaped rough flange parts protruding frontward and rearward from an upper side and a lower side of the rough web part, respectively. The bending step is a step of pressing at least one specified rough flange part, which is at least one of the four rough flange parts, with a first die to form a bent portion in the specified rough flange part such that the bent portion is bent inward in an up-down direction of the forged product.

公开(公告)号：US20220216741A1

公开(公告)日：2022-07-07

申请号：US17594198

申请日：2020-04-21

Applicant: NIPPON STEEL CORPORATION

Inventor： Nao OTAKI ,  Hirokazu OKADA ,  Yasutaka NOGUCHI ,  Kenji IMANISHI ,  Masahiro TASAKA

IPC: H02K1/02 ,  C22C38/54 ,  C22C38/48 ,  C22C38/46 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  H02K49/04

Abstract: A cylindrical part of a rotor for an eddy current deceleration device of the present embodiment has a chemical composition consisting of, by mass %, C: 0.05 to 0.15%, Si: 0.10 to 0.40%, Mn: 0.50 to 1.00%, P: 0.030% or less, S: 0.030% or less, Mo: 0.20 to 1.00%, Nb: 0.020 to 0.060%, V: 0.040 to 0.080%, sol. Al: 0.030 to 0.100%, B: 0.0005 to 0.0050%, N: 0.003 to 0.010%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Cr: 0 to 0.10%, and the balance: Fe and impurities, and in which the total area fraction of martensite and bainite in a microstructure is more than 95.0%, and the number density of carbides having an equivalent circular diameter of 100 to 500 nm is 0.35 to 0.75 particles/μm2.

公开(公告)号：US20210036595A1

公开(公告)日：2021-02-04

申请号：US16964283

申请日：2019-01-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Kenji IMANISHI ,  Takuya FUJITA ,  Hiroyuki YAMAGUCHI ,  Hiroshi NOGAMI ,  Yasutaka NOGUCHI ,  Mitsuo MIYAHARA

IPC: H02K49/04 ,  H02K7/104 ,  H02K49/10

Abstract: A decelerating apparatus includes a brake member, primary and secondary permanent magnets and pole pieces. The primary permanent magnets are arranged in a circumferential direction to face an inner or outer peripheral surface of the brake member with a gap in between. Each of the primary permanent magnets has two opposite magnetic poles arranged in a radial direction. The secondary permanent magnets and the pole pieces are placed in the gap and arranged in the circumferential direction. Each of the secondary permanent magnets has two opposite magnetic poles arranged in the circumferential direction. Each of the pole pieces is positioned between adjacent secondary permanent magnets. Magnetic pole arrangements of adjacent primary permanent magnets are opposite to each other. Magnetic pole arrangements of adjacent secondary permanent magnets are opposite to each other. Each of the secondary permanent magnets has a trapezoidal cross-sectional shape including an upper base and a lower base.