US 12,331,787 B2
Rolling bearing, rotating apparatus, bearing monitoring apparatus and method for monitoring bearing
Hideo Fujiura, Nagano (JP); Shigeyuki Adachi, Nagano (JP); Toshiaki Asakawa, Shizuoka (JP); and Atsushi Kitamura, Shizuoka (JP)
Assigned to MINEBEA MITSUMI Inc., Nagano (JP)
Appl. No. 17/596,448
Filed by MINEBEA MITSUMI Inc., Nagano (JP)
PCT Filed Jun. 11, 2020, PCT No. PCT/JP2020/023085
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/255861, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-115678 (JP), filed on Jun. 21, 2019.
Prior Publication US 2022/0307555 A1, Sep. 29, 2022
Int. Cl. F16C 41/00 (2006.01); F16C 19/16 (2006.01); F16C 19/52 (2006.01)
CPC F16C 41/00 (2013.01) [F16C 19/16 (2013.01); F16C 19/522 (2013.01); F16C 2233/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A rolling bearing comprising:
an outer ring having an outer peripheral surface;
an inner ring disposed coaxially with the outer ring, the inner ring being on an inner peripheral side of the outer ring;
multiple rolling elements disposed between the outer ring and the inner ring; and
a strain gauge configured to detect strain of the outer ring,
wherein the strain gauge includes at least one resistor formed of a Cr composite film,
wherein the outer peripheral surface of the outer ring includes a first side, and a second side opposite the first side,
wherein the second side is opposite a side of the rolling bearing at which a preload is applied,
wherein the resistor is disposed on the second side of the outer peripheral surface of the outer ring, and
wherein the resistor is disposed above the outer peripheral surface of the outer ring.
 
10. A rolling bearing comprising:
an outer ring having an outer peripheral surface;
an inner ring disposed coaxially with the outer ring, the inner ring being on an inner peripheral side of the outer ring;
multiple rolling elements disposed between the outer ring and the inner ring;
a strain gauge configured to detect strain of the outer ring; and
a housing having an inner peripheral surface and disposed in contact with an outer periphery of the outer ring,
wherein the strain gauge includes at least one resistor formed of a Cr composite film,
wherein the outer peripheral surface of the outer ring includes a first side, and a second side opposite the first side,
wherein the second side is opposite a side of the rolling bearing at which a preload is applied,
wherein the resistor is disposed on the second side of the outer peripheral surface of the outer ring,
wherein the resistor is disposed above the outer peripheral surface of the outer ring, and
wherein the inner peripheral surface of the housing is in contact with the outer peripheral surface of the outer ring that is located directly above the multiple rolling elements, over the whole circumference of the outer ring.