公开(公告)号：US20230341293A1

公开(公告)日：2023-10-26

申请号：US17763521

申请日：2020-07-31

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Masaki HAYASHI ,  Kenta KATO ,  Rizwan BAJWA ,  Zhang YI

IPC: G01M15/02 ,  F16C17/24

CPC classification number: G01M15/02 ,  F16C17/24 ,  F16C2233/00 ,  F16C2360/22

Abstract: Provided is a sliding member of an internal combustion engine including a self-detecting material for highly reliable and easy monitoring of damage to the sliding member. A sliding member of an internal combustion engine including a self-detecting material for monitoring damage to the sliding member, wherein the sliding member has a single-layer or multi-layer structure made of a metal, an alloy, and/or a resin material, the self-detecting material is embedded in at least one of the layers constituting the sliding member, and the self-detecting material is configured of at least one kind of material that exhibits a signal characteristic in response to external energy.

公开(公告)号：US11761487B2

公开(公告)日：2023-09-19

申请号：US16828659

申请日：2020-03-24

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Takayoshi Yamauchi

IPC: C08K7/02 ,  F16C17/02 ,  F16C17/06 ,  F16C33/04 ,  F16C33/12 ,  A01J5/007 ,  B32B15/098 ,  B32B15/088 ,  B32B15/085 ,  B32B15/092

CPC classification number: F16C33/122 ,  A01J5/007 ,  C08K7/02 ,  F16C17/02 ,  B32B15/085 ,  B32B15/088 ,  B32B15/092 ,  B32B15/098 ,  C08K2201/004 ,  C08K2201/016 ,  F16C2208/02 ,  F16C2208/04 ,  F16C2208/36 ,  F16C2240/48

Abstract: A sliding member for a thrust bearing is provided. A sliding layer includes fibrous particles dispersed in a synthetic resin, and has a sliding surface side region and an interface side region. The particles have an average particle size Dsur, first and Dsur, second respectively in first and second cross-sections in the sliding surface side region, and Dint, first and Dint, second respectively in first and second cross-sections in the interface side region. Dsur, first and Dint, second are 5-30 μm, and Dsur, second and Dint, first are 5 to 20% of respectively Dsur, first and Dint, second. A dispersion index of the particles having the major axis length of 20 μm or longer is 5 or more, both in the sliding surface side region in view of the first cross-section and in the interface side region in view of the second cross-section.

公开(公告)号：US20230228296A1

公开(公告)日：2023-07-20

申请号：US18153393

申请日：2023-01-12

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Tomoyasu SHIROYA ,  Akira ANDO

IPC: F16C33/12

CPC classification number: F16C33/125 ,  F16C33/124 ,  F16C2204/36

Abstract: A sliding member includes a bearing alloy layer and an overlay. The overlay includes a diffusion prevention layer on the bearing alloy layer, and a corrosion prevention layer on the diffusion prevention layer. A surface of the corrosion prevention layer is a sliding surface. The corrosion prevention layer constitutes 50% to 90% of an entire volume of the overlay. The corrosion prevention layer and the diffusion prevention layer each include a corrosion inhibitor and the balance of Bi and inevitable impurities. The corrosion inhibitor is defined as one or more elements that have a higher oxygen affinity than Bi and that form an alloy, a solid solution or an intermetallic compound with Bi. An average concentration of the corrosion inhibitor included in the diffusion prevention layer is lower than an average concentration of the corrosion inhibitor included in the corrosion prevention layer.

公开(公告)号：US11680603B2

公开(公告)日：2023-06-20

申请号：US17379169

申请日：2021-07-19

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Toshiro Matsumoto

IPC: F16C17/03 ,  F16C17/06

CPC classification number: F16C17/03 ,  F16C17/06

Abstract: Proposed is a novel coupling mechanism capable of applying a preload to a ball portion and a socket portion which constitute a coupling mechanism of a titling pad bearing, without using a spring element.

公开(公告)号：US11619256B2

公开(公告)日：2023-04-04

申请号：US17696128

申请日：2022-03-16

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Tomohiro Yamada

IPC: F16C9/02 ,  F01M11/02

Abstract: A half thrust bearing for a crankshaft of an internal combustion engine is formed of a back metal layer and a bearing alloy layer to have a slide surface and two thrust reliefs. Each thrust relieve includes a first region, where the back metal layer is exposed, on a circumferential end surface side, and a second region, where the bearing alloy layer is exposed, on the slide surface side while the slide surface includes two third regions adjacent to the second region, and a fourth region between the two third regions. A circumferential end region consists of the first, second and third regions. In the second region and the third regions, the bearing alloy layer includes a uniform thickness portion at a radial center, and a decreased thickness portion adjacent to an inner-diameter-side end surface.

公开(公告)号：US11566658B2

公开(公告)日：2023-01-31

申请号：US17587305

申请日：2022-01-28

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Daiki Iida ,  Yasushi Saito

IPC: F16C9/02 ,  F16C9/04 ,  F16C3/14 ,  F01M11/02

Abstract: Provided is a half bearing constituting a sliding bearing for a shaft member of an internal combustion engine that is unlikely to cause seizure in a sliding surface even if deflection or whirling of the shaft member occurs during an operation of the internal combustion engine. In a half bearing that constitutes a sliding bearing, a plurality of circumferential-direction grooves are formed to be adjacent to each other in a sliding surface including first and second curved surfaces with different curvatures, the sliding surface includes a plane portion that is parallel to an axial line direction and an inclined surface portion that is adjacent to the plane portion, the inclined surface portion is displaced from the plane portion toward an end portion of the sliding surface in the axial line direction such that the sliding surface successively comes close to a back surface, positions of maximum groove depths of the circumferential-direction grooves are located on groove center lines, the groove center lines in the inclined surface portion of the sliding surface are inclined relative to a vertical line toward the end portion of the sliding surface in the axial line direction, a groove inclination angle of the circumferential-direction grooves that are closest to the plane portion is a minimum angle, and the groove inclination angle successively increases toward the end portion of the sliding surface in the axial line direction.

公开(公告)号：US20220260110A1

公开(公告)日：2022-08-18

申请号：US17587305

申请日：2022-01-28

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Daiki IIDA ,  Yasushi SAITO

IPC: F16C9/02

Abstract: Provided is a half bearing constituting a sliding bearing for a shaft member of an internal combustion engine that is unlikely to cause seizure in a sliding surface even if deflection or whirling of the shaft member occurs during an operation of the internal combustion engine. In a half bearing that constitutes a sliding bearing, a plurality of circumferential-direction grooves are formed to be adjacent to each other in a sliding surface including first and second curved surfaces with different curvatures, the sliding surface includes a plane portion that is parallel to an axial line direction and an inclined surface portion that is adjacent to the plane portion, the inclined surface portion is displaced from the plane portion toward an end portion of the sliding surface in the axial line direction such that the sliding surface successively comes close to a back surface, positions of maximum groove depths of the circumferential-direction grooves are located on groove center lines, the groove center lines in the inclined surface portion of the sliding surface are inclined relative to a vertical line toward the end portion of the sliding surface in the axial line direction, a groove inclination angle of the circumferential-direction grooves that are closest to the plane portion is a minimum angle, and the groove inclination angle successively increases toward the end portion of the sliding surface in the axial line direction.

公开(公告)号：US20220176673A1

公开(公告)日：2022-06-09

申请号：US17512957

申请日：2021-10-28

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Erina Yasuda ,  Shigeru Inami ,  Yuma Haneda

IPC: B32B3/26 ,  B32B15/08 ,  B32B38/00 ,  B32B37/18

Abstract: A sliding member including: a soft metal layer formed by stacking a crystal of soft metal, in which a coarse crystal is exposed on a surface of the soft metal layer, the coarse crystal has a particle length of 1.5 μm or more in a plane direction of the surface, and a distribution proportion of the coarse crystal is 5 to 50%, wherein the distribution proportion is a proportion of a circumscribed rectangle in a unit length of a virtual straight line, the circumscribed rectangle is applied to the coarse crystal appearing in a cross section of the soft metal layer, and the virtual straight line passing through the circumscribed rectangles in the cross section and parallel to a surface reference line of the soft metal layer is formed, an upper side of the circumscribed rectangle is parallel to the surface reference line of the soft metal layer, and the surface reference line is an average height of the surface of the soft metal layer appearing in the cross section.

公开(公告)号：US11236780B2

公开(公告)日：2022-02-01

申请号：US17086816

申请日：2020-11-02

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Yoshifumi Ito ,  Yu Suzuki ,  Takayoshi Yamauchi

IPC: F16C17/02 ,  F16C33/12 ,  F16C33/20

Abstract: A sliding member includes a back-metal layer and a sliding layer on the back-metal layer, and the sliding layer has a sliding surface. The sliding layer includes a synthetic resin and fibrous particles dispersed in the synthetic resin. A volume ratio of the fibrous particles in the sliding layer is 1 to 15%, and the fibrous particles are made of semi-graphite having a nano indenter hardness of 1000 to 5000 MPa. An average aspect ratio of the fibrous particles is not less than 5, where an aspect ratio is defined as a ratio of a major axis to a minor axis of the fibrous particle viewed from the sliding surface. An average grain size of the fibrous particles in cross-sectional view perpendicular to the sliding surface is 5 to 50 μm.

公开(公告)号：US11221042B2

公开(公告)日：2022-01-11

申请号：US16762633

申请日：2018-11-08

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Tetsuya Ogawa ,  Kazuki Sakai

IPC: F16C17/04 ,  F16C33/04 ,  F16C33/20 ,  F16C9/02 ,  F16C33/10

Abstract: This half thrust bearing having a half-ring shape has: a sliding surface for receiving force in the axial direction; a back surface opposed to the sliding surface; and a resin covering layer on the sliding surface. The half thrust bearing is characterized in that the thickness of the resin covering layer is greatest at the circumferential central part of the half thrust bearing, and becomes lesser toward both circumferential ends of the half thrust bearing. The present invention also pertains to a thrust bearing, a bearing device, and an internal combustion engine.