US 12,463,516 B2
Rotating device
Hitoshi Iwata, Nagano (JP); Tsuyoshi Kano, Nagano (JP); Naoki Ohsawa, Nagano (JP); Shoma Yamanishi, Nagano (JP); Toshiyuki Nishikata, Nagano (JP); Seiji Mitamura, Nagano (JP); Michihiro Shimizu, Nagano (JP); and Yuta Amagi, Nagano (JP)
Assigned to MINEBEA MITSUMI Inc., Nagano (JP)
Appl. No. 17/597,966
Filed by MINEBEA MITSUMI Inc., Nagano (JP)
PCT Filed Aug. 6, 2020, PCT No. PCT/JP2020/030114
§ 371(c)(1), (2) Date Jan. 31, 2022,
PCT Pub. No. WO2021/029309, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 2019-147928 (JP), filed on Aug. 9, 2019.
Prior Publication US 2022/0316487 A1, Oct. 6, 2022
Int. Cl. H02K 21/22 (2006.01); F16C 19/04 (2006.01); F16C 19/54 (2006.01); H02K 1/27 (2022.01); H02K 7/00 (2006.01); H02K 7/08 (2006.01); H02K 16/04 (2006.01)
CPC H02K 21/22 (2013.01) [F16C 19/04 (2013.01); F16C 19/546 (2013.01); H02K 1/27 (2013.01); H02K 7/003 (2013.01); H02K 7/08 (2013.01); H02K 16/04 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A rotating device comprising:
a shaft member as a stationary part;
a tubular rotating body rotatable with respect to the shaft member;
a first bearing and a second bearing supporting the rotating body with respect to the shaft member;
a single stator or a plurality of stators provided at an inner side of the rotating body;
a single tubular magnet or a plurality of tubular magnets fixed at an inner circumferential surface of the rotating body;
a single rotor blade or a plurality of rotor blades provided at a part of the rotating body extending in an axial direction of the shaft member;
a single opening or a plurality of openings provided through the part of the rotating body extending in the axial direction of the shaft member; and
a spacer arranged between the first bearing and the single rotor blade or one of the plurality of rotor blades in the axial direction of the shaft member;
wherein
the part of the rotating body is defined between the first bearing and the magnet in the axial direction,
the magnet is formed of a resin,
a length of the rotating body in a radial direction is shorter than a length of the rotating body in the axial direction of the shaft member,
inner circumferential surfaces of the first bearing and the second bearing are fixed at an outer circumferential surface of the shaft member,
the shaft member and the rotating body are each formed of a single member,
an outer diameter of the shaft member is substantially the same in the axial direction of the shaft member from a part, of the shaft member, opposing the first bearing to a part, of the shaft member, opposing the second bearing,
an inner diameter and an outer diameter of the rotating body are each substantially the same in the axial direction of the shaft member 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,
the single stator or one of the plurality of stators is disposed at a central part of the shaft member in the axial direction of the shaft member,
the single magnet or one of the plurality of magnets is disposed at a central part of the rotating body in the axial direction of the shaft member,
the first bearing and the second bearing are disposed at both the end part sides of the rotating body,
the single rotor blade or one of the plurality of rotor blades is arranged on the inner side of the part of the rotating body and arranged immediately adjacent the single opening or position of one of the plurality of openings in the axial direction of the shaft member, and
the single opening or the plurality of openings penetrates the part of the rotating body from inside to outside in the radial direction,
wherein the single rotor blade or the one of the plurality of rotor blades is positioned between the single opening or the one of the plurality of openings and the shaft in the radial direction,
wherein the spacer covers a surface of the first bearing, and
wherein the spacer is formed as part of the single rotor blade or the one of the plurality of rotor blades.