公开(公告)号：US20240125349A1

公开(公告)日：2024-04-18

申请号：US18472465

申请日：2023-09-22

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Fumihiro SUZUKI ,  Takahito KUNIEDA ,  Kenta NAKANE

IPC: F16C17/02

CPC classification number: F16C17/024

Abstract: A foil bearing includes a bearing housing, a top foil, a bump foil, and two retaining portions. A holding groove is formed in the inner circumferential surface of the bearing housing to extend in an 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 portion in the axial direction. In the axial direction, the distance between the facing surfaces of the two retaining portions is longer than the length of the insertion plate portion. At least one of the insertion plate portions includes a bent plate portion that is bent to contact the facing surface.

公开(公告)号：US20210025388A1

公开(公告)日：2021-01-28

申请号：US16930920

申请日：2020-07-16

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Daisuke MASAKI ,  Takayuki HIRANO ,  Shintaro KASHIWA ,  Naoki TAKANI

IPC: F04C18/12 ,  F04C18/08 ,  F04C29/00

Abstract: A motor-driven Roots pump includes a housing, a drive shaft and a driven shaft that have axial lines parallel with each other, and a gear chamber. The housing includes a first partition that has a first defining surface, a second partition having a second defining surface, and a relief recess. An addendum circle of the drive gear and an addendum circle of the driven gear intersect with each other at a first intersection point. A plane that includes both the axial lines is defined as an imaginary plane. The first intersection point is located on a side of the imaginary plane on which the drive gear and the driven gear start meshing with each other. An opening of the relief recess is opposed to the first intersection point and is arranged in a region on a side of the imaginary plane on which the first intersection point is located.

公开(公告)号：US20240328455A1

公开(公告)日：2024-10-03

申请号：US18615253

申请日：2024-03-25

Applicant: Kabushiki Kaisha Toyota Jidoshokki

Inventor： Fumiya SHINODA ,  Fumihiro Suzuki ,  Kenta Nakane ,  Yuuji Iwakiri ,  Tomohisa Yamada ,  Yasuhiro Kondoh ,  Haruhiro Hattori

IPC: F16C17/02

CPC classification number: F16C17/024

Abstract: The foil bearing includes a housing, a top foil, and bump foils. The bump foil includes first support portions that contact an outer circumferential surface of the top foil, second support portions that contact an inner circumferential surface of the housing, and coupling portions that couple the first support portions and the second support portions together such that the first support portions and the second support portions are disposed alternately in a rotation direction of a rotating body. When a load input from the rotating body increases, the bump foil is deformed to increase one of the number of the first support portions that contact the outer circumferential surface of the top foil and the number of the second support portions that contact the inner circumferential surface of the housing before increasing the other one of the numbers.

公开(公告)号：US20240159267A1

公开(公告)日：2024-05-16

申请号：US18284443

申请日：2022-03-18

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Fumihiro SUZUKI ,  Hidefumi MORI

IPC: F16C17/02

CPC classification number: F16C17/024

Abstract: A foil bearing includes a top foil, which includes a bearing surface facing a rotary member, extends in a circumferential direction, and includes a fixed end at one end in the circumferential direction and a free end at the other end in the circumferential direction, and a sheet-shaped back foil, which elasticity supports the top foil. The top foil includes a connecting section that connects, at a location between the fixed end and the free end, a first side of the top foil, at which the bearing surface is located, to a second side of the top foil, at which the back foil is located, and a cutout section that reduces the thickness of the top foil so as to facilitate deformation of the top foil. The cutout section is formed at the second side rather than the first side.

公开(公告)号：US20230167849A1

公开(公告)日：2023-06-01

申请号：US17992464

申请日：2022-11-22

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumihiro SUZUKI ,  Fumiya SHINODA ,  Hidetaka HAYASHI ,  Naoharu UEDA ,  Takuhito TSUTSUI

IPC: F16C17/02 ,  C10M125/04

CPC classification number: F16C17/024 ,  C10M125/04 ,  F16C2223/30 ,  F16C2360/00 ,  C10M2217/0443

Abstract: A turbo fluid machine includes a rotating member having a bearing-contact surface; an operating part configured to rotate together with the rotating member to compress and discharge a fluid; a housing accommodating the rotating member and the operating part; and a foil bearing having a bearing surface that faces the bearing-contact surface and supporting the rotating member such that the rotating member is rotatable relative to the housing. At least one of the bearing-contact surface or the bearing surface has thereon a coating layer. The coating layer comprises polyamide-imide serving as a binder resin and molybdenum disulfide serving as a solid lubricant. A mass ratio of molybdenum disulfide to polyamide-imide is 0.42 or more.

公开(公告)号：US20220275834A1

公开(公告)日：2022-09-01

申请号：US17674632

申请日：2022-02-17

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Fumihiro SUZUKI

IPC: F16C32/06 ,  F16C35/02

Abstract: A fluid machine includes a rotating body, an operation body rotated integrally with the rotating body, a housing, hydrodynamic plain bearings rotatably supporting the rotating body relative to the housing, and a cooling passage arranged in the housing. The hydrodynamic plain bearings each include a resin coating layer at a portion that is opposed to the rotating body. The hydrodynamic plain bearings include at least one combination of hydrodynamic plain bearings. Each combination includes an upstream hydrodynamic plain bearing and a downstream hydrodynamic plain bearing located at different positions in a direction in which the fluid flows through the cooling passage. The coating layer of the upstream hydrodynamic plain bearing has a lower hardness than the coating layer of the downstream hydrodynamic plain bearing.

公开(公告)号：US20210340979A1

公开(公告)日：2021-11-04

申请号：US17241730

申请日：2021-04-27

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI ,  NOK CORPORATION

Inventor： Fumiya SHINODA ,  Daisuke MASAKI ,  Takayuki HIRANO ,  Shintaro KASHIWA ,  Naoki TAKANI ,  Yohei MIKI

IPC: F04C2/12 ,  F04C15/00

Abstract: A housing unit of a Roots pump includes a rotor housing, which includes a peripheral wall, and a cover member, which closes an opening of the rotor housing. At least one of a mating surface of the peripheral wall or a mating surface of the cover member includes an annular first groove accommodating a seal member. The rotor housing includes a bulging portion including a second groove. The seal member incudes first projections, which project from an annular seal body, and a second projection, which projects further radially inward from the seal body than the first projections. Each first projection includes a distal end that contacts a side surface on a radially inner side or on a radially outer side of the first groove. The second projection is arranged in the second groove to determine the position of the seal body in the first groove.

公开(公告)号：US20200208635A1

公开(公告)日：2020-07-02

申请号：US16725519

申请日：2019-12-23

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Takayuki HIRANO ,  Daisuke MASAKI ,  Shintaro KASHIWA ,  Naoki TAKANI ,  Takahiro KATO

IPC: F04C27/00 ,  F16J15/02

Abstract: A seal member includes pushing projections that project from a seal body toward at a groove inner-side circumferential surface and are arranged at intervals in a circumferential direction of the seal body. The pushing projections push the seal body against the groove inner-side circumferential surface and a groove outer-side circumferential surface between the groove inner-side circumferential surface and the groove outer-side circumferential surface. This reduces the gap between the groove outer-side circumferential surface and the seal member in the seal accommodating groove. Thus, salt water is unlikely to collect in the gap between the groove outer-side circumferential surface of the seal accommodating groove and the seal member. This improves the corrosion resistance of the housing and the seal member.

公开(公告)号：US20240209890A1

公开(公告)日：2024-06-27

申请号：US18543688

申请日：2023-12-18

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Fumihiro SUZUKI

IPC: F16C17/02 ,  F16C37/00

CPC classification number: F16C17/024 ,  F16C37/002

Abstract: A foil bearing includes a thin plate member disposed between bump foils and a bearing housing. The bearing housing has a regulation groove into which a part of a top foil and a part of the thin plate member are inserted and which regulates movement of the top foil and the thin plate member in a circumferential direction of a rotary shaft. A regulator is disposed on the regulation groove and regulates the movement of the top foil and the thin plate member in an axial direction of the rotary shaft. The thin plate member has an opening that is opened on an inner peripheral surface of the thin plate member. A part of the bump foils is inserted into and engaged with the opening so that movement of the bump foils is regulated in the circumferential direction and the axial direction relative to the bearing housing.

公开(公告)号：US20240141898A1

公开(公告)日：2024-05-02

申请号：US18242853

申请日：2023-09-06

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Fumiya SHINODA ,  Fumihiro Suzuki

IPC: F04C29/04 ,  F04C29/02 ,  F16C32/06 ,  F16C37/00

CPC classification number: F04C29/04 ,  F04C29/02 ,  F16C32/0629 ,  F16C37/002

Abstract: A fluid machine includes a plurality of fluid dynamic plain bearings supporting a rotating member. The fluid dynamic plain bearings each include: a top foil; a bump foil; and a bearing housing. The top foil has a bearing surface that has one end portion and the other end portion in a circumferential direction of the bearing surface. The top foil has a fixed end and a free end respectively formed at the one end portion and the other end portion. A movement of the free end in an axial direction of the rotating member is regulated by a regulating member. A clearance through which a fluid flows is formed between the fixed end and the free end. The free end has a discharge passage through which a foreign substance contained in the fluid is discharged from the clearance. The discharge passage is formed through the free end.