US 12,126,231 B2
Fixing ring, rotary electric machine, and resolver rotor
Hajime Kotegawa, Kawasaki Kanagawa (JP); and Hideki Hisada, Kuwana Mie (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki Kanagawa (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Dec. 15, 2022, as Appl. No. 18/066,894.
Application 18/066,894 is a continuation of application No. PCT/JP2022/017052, filed on Apr. 4, 2022.
Claims priority of application No. 2021-150263 (JP), filed on Sep. 15, 2021.
Prior Publication US 2023/0119104 A1, Apr. 20, 2023
Int. Cl. H02K 24/00 (2006.01); H02K 11/225 (2016.01)
CPC H02K 24/00 (2013.01) [H02K 11/225 (2016.01)] 8 Claims
OG exemplary drawing
 
1. A fixing ring comprising:
a plurality of narrow portions which are provided on an annular first surface and a second surface opposed to each other in parallel with each other, and widths of which viewed from an outer circumferential surface connecting between an outer circumferential edge of the first surface and an outer circumferential edge of the second surface in an inward normal direction of the outer circumferential surface are the smallest;
a plurality of broad portions which are provided on the first surface and the second surface, and widths of which are greater than the widths of the narrow portions;
a plurality of first piece portions each of which is provided on each of the broad portions, and is elastically deformable in the normal direction of the broad portion with a first bent portion to be bent toward the first surface side serving as a point of origin, and
a plurality of second piece portions each of which is arranged adjacent to the first piece portion of each of the broad portions in a circumferential direction of the first surface and the second surface and is elastically deformable in a direction of a distance between the first surface and the second surface with a second bent portion to be bent toward the second surface side serving as a point of origin, wherein
in a map shape formed by projecting the plurality of broad portions and the plurality of first piece portions onto a virtual plane parallel to the first surface, the first bent portion of each of the first piece portions intersects a straight line passing through a contact point of a circumscribed circle in contact with an outer circumferential edge of the broad portion on which the first piece portion is provided and a center point of the circumscribed circle, and each of the first piece portions is positioned between an inscribed circle in contact with an inner circumferential edge of the first piece portion and the first bent portion, and
in a map shape formed by projecting the plurality of first piece portions and the plurality of second piece portions onto the virtual plane, each of the second piece portions is positioned outside the inscribed circle in contact with the inner circumferential edge of the first piece portion adjacent to the second piece portion.