Ihi Corporation

Natsuki Yoneyama

Yuji Sasaki

Haruki Eguchi

Naoki Oiwa

Isao Nakanowatari

Hidekazu Tomono

Shuji Ikeda

Hiroo Takahashi

Hiroki Yoshizawa

Hisashi Honjou

Keisuke Nagao

Kai Iijima

Hikaru Sugiura

Yoshihito Katsu

Masahiro Kuchi

Hiroto Yamaoka

Shigeyuki Satoh

Yohei Sakakibara

Nobuyasu Tsuno

Yoichi Yamashita

Osamu Harasaki

Akihiro Nomura

Takashi Yoshinouchi

Masayuki Satake

A motor rotor includes a shaft body, a cylindrical magnet covering an outer circumferential surface of the shaft body, a cylindrical protective layer covering an outer circumferential surface of the magnet and an annular end ring having the shaft body inserted therethrough, and in contact with an end surface of the magnet. The end ring is fixed to the shaft body by an inner circumferential resin portion formed between an inner circumferential surface of the end ring and the outer circumferential surface of the shaft body.

Motor rotor with end ring

A rotor includes a cylindrical magnet structure extending in an axial direction to cover a shaft, and a protective tube including a fiber body covering an outer circumferential surface of the magnet structure. The outer circumferential surface of the magnet structure has a first tapered surface gradually decreasing in diameter toward a first end surface of the magnet structure, and a second tapered surface gradually decreasing in diameter toward a second end surface opposite the first end surface in the axial direction. The protective tube includes a first end portion that is bonded to the first tapered surface of the magnet structure, and a second end portion that is bonded to the second tapered surface of the magnet structure.

Rotor, electric motor, and rotor production method

A rare earth permanent magnet includes a main phase containing: a rare earth element R of one or more types including Nd; an element L of one or more types selected from a group consisting of Co, Be, Li, Al, and Si; B; and Fe, wherein crystals which form the main phase belong to P4/mnm; some of B atoms occupying a 4f site of the crystals are substituted with atoms of the element L; each distribution of Nd atoms and the atoms of the element L appears along a C-axis direction of the crystals in a plurality of cycles; and the rare earth permanent magnet includes an area where a cycle of the atoms of the element L matches a cycle of the Nd atoms.

Rare earth permanent magnet and rare earth permanent magnet manufacturing method

A magnetic property of a rare earth permanent magnet containing neodymium, iron, and boron is enhanced. The present disclosure is a rare earth permanent magnet with a compound represented by a following expression as a main phase: NdFeBM. In the expression, M represents an element selected from any one of cobalt, beryllium, lithium, aluminum, and silicon and x satisfies 0.01&#x2264;x&#x2264;0.25. The main phase has an Nd&#x2014;Fe&#x2014;B layer and an Fe layer periodically and part of boron is substituted with any one or more types of elements selected from a group consisting of cobalt, beryllium, lithium, aluminum, and silicon.

A roller for in-furnace conveyance () which is provided with a fitting section () in which a fitting hole () of a body section () and a fitting shaft () of a shaft section () are fitted, and which constitutes a single roller by welding of the fitting section, wherein the fitting section has a first fitting section () in which fitting occurs with a prescribed interstice at a position separated from the weld position, and a second fitting section () in which fitting occurs with an interstice larger than that of the first fitting section at a position adjacent to the weld position.

Roller for in-furnace conveyance

Growing community of inventors

Tokyo, Japan

Natsuki Yoneyama