US 12,404,895 B2
Foil bearing
Fumiya Shinoda, Kariya (JP); Fumihiro Suzuki, Kariya (JP); Takahito Kunieda, Kariya (JP); and Kenta Nakane, Kariya (JP)
Assigned to KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Filed by KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya (JP)
Filed on Sep. 22, 2023, as Appl. No. 18/472,465.
Claims priority of application No. 2022-164877 (JP), filed on Oct. 13, 2022; and application No. 2023-082789 (JP), filed on May 19, 2023.
Prior Publication US 2024/0125349 A1, Apr. 18, 2024
Int. Cl. F16C 17/02 (2006.01)
CPC F16C 17/024 (2013.01) 9 Claims
OG exemplary drawing
 
1. A foil bearing that supports a rotary shaft in a radial direction, the foil bearing comprising:
a tubular bearing housing into which the rotary shaft is inserted;
a top foil disposed between the rotary shaft and the bearing housing;
a bump foil that is disposed between the bearing housing and the top foil to elastically support the top foil; and
two retaining portions facing the top foil and the bump foil in an axial direction of the bearing housing and preventing the top foil and the bump foil from being dislodged from the bearing housing, wherein
a holding groove is formed in an inner circumferential surface of the bearing housing to extend in the axial direction,
the top foil and the bump foil each include an insertion plate portion, which is inserted into the holding groove and extends in the axial direction,
each of the retaining portions includes a facing surface that faces the insertion plate portions in the axial direction,
in the axial direction, a distance between the facing surfaces of the two retaining portions is longer than a length of the insertion plate portions, and
at least one of the insertion plate portion of the top foil and the insertion plate portion of the bump foil includes a bent plate portion at at least one of opposite ends in the axial direction, the bent plate portion being bent and contacting the corresponding facing surface during a rotation of the rotary shaft in a state in which the rotary shaft is inclined with respect to an axis of the bearing housing.