US 12,066,056 B2
Bearing device, spacer, and manufacturing method
Takashi Koike, Iwata (JP); Yusuke Shibuya, Iwata (JP); and Sota Yamaguchi, Iwata (JP)
Assigned to NTN CORPORATION, Osaka (JP)
Appl. No. 17/798,830
Filed by NTN Corporation, Osaka (JP)
PCT Filed Feb. 2, 2021, PCT No. PCT/JP2021/003613
§ 371(c)(1), (2) Date Aug. 10, 2022,
PCT Pub. No. WO2021/161843, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2020-023669 (JP), filed on Feb. 14, 2020; and application No. 2021-003421 (JP), filed on Jan. 13, 2021.
Prior Publication US 2023/0086645 A1, Mar. 23, 2023
Int. Cl. F16C 32/04 (2006.01); F16C 43/04 (2006.01); H02K 7/09 (2006.01)
CPC F16C 32/0474 (2013.01) [F16C 43/04 (2013.01); H02K 7/09 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A bearing device that rotatably supports a rotary member, the bearing device comprising:
a magnetic ring fixed to the rotary member; and
a stator fixed to a non-rotary member so as to face the magnetic ring, wherein
the magnetic ring and the stator constitute a claw pole type generator,
the stator includes
a coil, and
a magnetic yoke surrounding the coil,
the magnetic yoke is configured by combining a first member and a second member that are magnetic bodies,
the first member includes a plurality of first claws arranged in a comb shape,
the second member includes a plurality of second claws arranged in a comb shape,
the plurality of first claws and the plurality of second claws are alternately arranged on a surface facing the magnetic ring,
the first member and the second member have an identical shape,
the stator and the magnetic ring have an annular shape through which a rotation axis of the bearing device passes,
one of the plurality of first claws and the plurality of second claws are arranged on one side with respect to the coil in cross sections of the stator in a first plane and a second plane including the rotation axis,
the first member and the second member overlap each other in the order of the first member and the second member in a direction away from the coil on a side opposite to the one side with respect to the coil in the cross section in the first plane, and
the first member and the second member overlap each other in the order of the second member and the first member in a direction away from the coil on a side opposite to the one side with respect to the coil in the cross section in the second plane.