公开(公告)号：US20220416603A1

公开(公告)日：2022-12-29

申请号：US17844789

申请日：2022-06-21

Applicant: Nidec Corporation

Inventor： Ryo MIYOSHI ,  Kazuhiro SATO ,  Toshihiro AKIYAMA

IPC: H02K1/30 ,  H02K7/08 ,  H02K21/22 ,  G11B19/20

Abstract: A rotor includes a rotor hub including a through-hole to which the shaft is fixed. An upper end and a lower end of an opposing region where an outer peripheral surface of the shaft and an inner peripheral surface of the through-hole oppose each other in a radial direction are respectively provided with an upper gap portion and a lower gap portion opposing each other through a space in the radial direction. The upper gap portion and the lower gap portion each include a bottom portion extending in a direction intersecting the center axis and a peripheral wall portion connected to a radial outer edge of the bottom portion and extending along the center axis.

公开(公告)号：US20190097483A1

公开(公告)日：2019-03-28

申请号：US15917886

申请日：2018-03-12

Applicant: Nidec Corporation

Inventor： Ryo MIYOSHI ,  Takuo MIYAKE

IPC: H02K3/38 ,  H02K1/16 ,  H02K3/12 ,  H02K3/50

CPC classification number: H02K3/38 ,  H02K1/16 ,  H02K3/12 ,  H02K3/50 ,  H02K3/522 ,  H02K5/225 ,  H02K11/33 ,  H02K2203/06

Abstract: A motor includes a lead wire insert hole arranged to have a lead wire extending from any of coils pass therethrough, and a bushing inserted in the lead wire insert hole. The bushing includes a body portion arranged to extend in a first direction; a plurality of through holes each of which is arranged to pass through the body portion in the first direction; and a plurality of projecting portions each of which is arranged to extend in the first direction, and project from a lateral surface of the body portion in a direction perpendicular to the first direction. Each through hole includes a cylindrical first hole portion arranged to have an opening on a first side in the first direction; and a second hole portion arranged to have an opening on a second side in the first direction, and to be continuous with the first hole portion, and including a slanting surface arranged to decrease in a diameter toward the first hole portion. A portion of the lead wire is arranged in a corresponding one of the through holes.