US 12,435,759 B2
Bearing device and electric vertical take-off and landing aircraft
Takashi Koike, Iwata (JP); and Yusuke Shibuya, Iwata (JP)
Assigned to NTN Corporation, Osaka (JP)
Appl. No. 18/284,830
Filed by NTN Corporation, Osaka (JP)
PCT Filed Mar. 28, 2022, PCT No. PCT/JP2022/015054
§ 371(c)(1), (2) Date Sep. 28, 2023,
PCT Pub. No. WO2022/210559, PCT Pub. Date Oct. 6, 2022.
Claims priority of application No. 2021-057707 (JP), filed on Mar. 30, 2021.
Prior Publication US 2024/0183394 A1, Jun. 6, 2024
Int. Cl. F16C 32/04 (2006.01); F16C 41/00 (2006.01); H02K 1/02 (2006.01); H02K 1/12 (2006.01); H02K 5/15 (2006.01); H02K 5/18 (2006.01); H02K 7/09 (2006.01)
CPC F16C 32/0474 (2013.01) [F16C 41/00 (2013.01); F16C 41/004 (2013.01); H02K 1/02 (2013.01); H02K 1/12 (2013.01); H02K 5/15 (2013.01); H02K 5/18 (2013.01); H02K 7/09 (2013.01); F16C 2233/00 (2013.01); F16C 2326/43 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A bearing device comprising:
a bearing that includes an outer ring, an inner ring disposed on a radially inside of the outer ring, a plurality of rolling elements rollably disposed in an annular space between the outer ring and the inner ring, a retainer that holds the plurality of rolling elements at intervals in a circumferential direction, and a first seal and a second seal that seal the annular space by sandwiching the retainer with the first seal and the second seal;
a magnetic ring that is supported by the retainer and has N poles and S poles alternately arranged;
a stator that is supported by the first seal and has a coil opposite to the magnetic ring;
at least one sensor that is supported by the second seal and detects a physical property of the bearing;
a wireless communication circuit that is supported by the second seal and wirelessly transmits output of the at least one sensor to the outside;
a power supply circuit that is supported by the second seal and supplies DC power generated by performing rectification processing of power generated by a generator including the magnetic ring and the stator to the at least one sensor and the wireless communication circuit; and
a wire that electrically connects the coil and the power supply circuit,
wherein the wire is disposed in a first groove provided on either an outer peripheral surface of the outer ring or an inner peripheral surface of the inner ring.