公开(公告)号：US20230279940A1

公开(公告)日：2023-09-07

申请号：US18176654

申请日：2023-03-01

Applicant: MINEBEA MITSUMI Inc.

Inventor： Koichiro HIRABAYASHI ,  Yukimasa MATSUMURA ,  Seiji MITAMURA

IPC: F16H57/039 ,  F16H1/16

CPC classification number: F16H57/039 ,  F16H1/16

Abstract: A gear box includes a motor, a worm pivotally supported by a shaft of the motor, a gear being formed at the worm, and a helical gear configured to mesh with the gear of the worm. A transfer coefficient of the helical gear with respect to a standard gear is x, an addendum coefficient of the helical gear is k, x satisfies −0.4

公开(公告)号：US20220316487A1

公开(公告)日：2022-10-06

申请号：US17597966

申请日：2020-08-06

Applicant: MINEBEA MITSUMI Inc.

Inventor： Hitoshi IWATA ,  Tsuyoshi KANO ,  Naoki OHSAWA ,  Shoma YAMANISHI ,  Toshiyuki NISHIKATA ,  Seiji MITAMURA ,  Michihiro SHIMIZU ,  Yuta AMAGI

IPC: F04D25/02 ,  F04D29/056 ,  H02K1/27 ,  H02K7/00 ,  H02K7/08 ,  H02K16/04 ,  F16C19/04

Abstract: A rotating body is shorter in radial direction than in axial direction. The inner circumferential surfaces of a first bearing and a second bearing are fixed at an outer circumferential surface of the shaft member. In the axial direction, the outer diameter of the shaft member is substantially the same from a part, of the shaft member, opposing the first bearing to a part, of the shaft member, opposing the second bearing, and the inner and outer diameters of the rotating body are substantially the same from an end part, of the rotating body, on the first bearing side to an end part, of the rotating body, on the second bearing side. In the axial direction, one of stators is disposed at a central part (C1) of the shaft member, one of magnets is disposed at a central part (C2) of the rotating body.

公开(公告)号：US20220200392A1

公开(公告)日：2022-06-23

申请号：US17595517

申请日：2020-05-29

Applicant: MINEBEA MITSUMI Inc.

Inventor： Hitoshi IWATA ,  Naoki OHSAWA ,  Shoma YAMANISHI ,  Toshiyuki NISHIKATA ,  Seiji MITAMURA ,  Michihiro SHIMIZU ,  Yuta AMAGI

IPC: H02K5/173 ,  H02K7/08 ,  H02K21/22

Abstract: To provide a motor capable of meeting a demand for size reduction. The motor includes an axial member, a tubular rotating body rotatable in relation to the axial member, a bearing supporting the rotating body with respect to the axial member, and a stator inside the rotating body. The rotating body preferably includes a tubular member formed of a single member, and a magnet.