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公开(公告)号：US11193536B2
公开(公告)日：2021-12-07
申请号：US16931689
申请日：2020-07-17
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Masahiro Nakai
Abstract: A sliding member includes a back-metal layer including an Fe alloy and a sliding layer including a copper alloy including 0.5 to 12 mass % of Sn and the balance of Cu and inevitable impurities. The sliding layer has a cross-sectional structure perpendicular to a sliding surface of the sliding layer. The cross-sectional structure includes first copper alloy grains that are in contact with a bonding surface of the back-metal layer and second copper alloy grains that are not in contact with the bonding surface. The first copper alloy grains has an average grain size D1 and the second copper alloy grains has an average grain size D2. D1 and D2 satisfy the following relations: D1 is 30 to 80 μm; and D1/D2=0.1 to 0.3.
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公开(公告)号：US20210285492A1
公开(公告)日：2021-09-16
申请号：US17189746
申请日：2021-03-02
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Tsuyoshi IWATA
IPC: F16C33/20
Abstract: A sliding member includes a resin layer that slides with a mating member. The resin layer contains polytetrafluoroethylene and an additive. The resin layer includes a plurality of rich regions formed in a thickness direction of the resin layer, the rich regions having a higher concentration of the polytetrafluoroethylene than other regions.
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公开(公告)号：US11035408B2
公开(公告)日：2021-06-15
申请号：US16734567
申请日：2020-01-06
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Shiho Goto
Abstract: A half thrust bearing for a crankshaft includes a back metal layer defining a first surface and a second surface, and a bearing alloy layer on the first surface to form a slide surface, and thrust relieves formed adjacent to both circumferential end surfaces and having a thrust relief surface consisting of the bearing alloy layer. Each circumferential end surface of the back metal layer includes an exposed end surface adjacent to the second surface, and a transition surface adjacent to the first surface. The bearing alloy layer further includes an extension portion covering the transition surface and having extension end surface adjacent to the exposed end surface, the extension end surface and the exposed end surface extending at least partly in the same plane.
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公开(公告)号：US20210095720A1
公开(公告)日：2021-04-01
申请号：US17022664
申请日：2020-09-16
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Ryo HANAI
Abstract: A sliding member incudes a back-metal layer and a sliding layer made of a copper alloy. The back-metal layer is made of a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon, and has a structure including a ferrite phase and pearlite. The back-metal layer includes a pore existing region including a plurality of closed pores having an average size of 1 to 10 μm. The pore existing region extends from the bonding surface toward an inner portion of the back-metal layer and having a thickness of 2 to 20 μm. At least a part of the plurality of closed pores has contour that is partially formed by the bonding surface in a cross-sectional view. A ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.02 to 0.08.
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公开(公告)号：US20210095719A1
公开(公告)日：2021-04-01
申请号：US17022647
申请日：2020-09-16
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Ryo HANAI
Abstract: A sliding member includes a back-metal layer and a sliding layer made of a copper alloy. The back-metal layer is made of a hypoeutectoid steel including 0.07 to 0.35 mass % of carbon, and has a structure including a ferrite phase and pearlite. The back-metal layer includes a pore existing region including a plurality of closed pores that are not open to a bonding surface when viewing a cross-section perpendicular to a sliding surface. The closed pores have an average size of 5 to 15 μm. The pore existing region extends from the bonding surface toward an inner portion of the back-metal layer, and has a thickness of 10 to 60 μm. A ratio V2/V1 of a total volume V2 of the closed pores to a volume V1 of the pore existing region is 0.05 to 0.1.
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Patent Agency Ranking
公开(公告)号：US10927887B2
公开(公告)日：2021-02-23
申请号：US15569059
申请日：2016-02-24
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Shigeru Inami , Tetsuya Ogawa
Abstract: A resin coating layer has a shape line that indicates the shape of a surface and is divided by virtual straight lines parallel to the X axis and setting an area of recessed sections that protrudes below the virtual straight lines and an area of protruding sections that protrudes above the virtual straight lines. A virtual straight line at a position at which the area totals for the area of recessed sections and the area of protruding sections are equal is defined as the average line for unevenness. Areas that protrude downwards from this average line for unevenness are defined as recessed sections and areas that protrude above this average line for unevenness are defined as protruding sections. The average area Sa for one recessed section is 4-120 μm2 and the number M of recessed sections between two points having a distance of 1 mm therebetween is 3-20.
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公开(公告)号：US10794426B2
公开(公告)日：2020-10-06
申请号：US15914001
申请日：2018-03-07
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Takayoshi Yamauchi
Abstract: Provided is a partially-cylindrical sliding member including a sliding layer including fibrous particles having an average particle size of 5-25 μm dispersed in a synthetic resin at a volume ratio of 10-35% of the sliding layer. The particles having a major axis length ≤20 μm are included at a volume ratio of ≥10% to total particles. A sliding surface side area is defined from the sliding surface and has a thickness of 25% of a sliding layer thickness T, where the fibrous particles having a major axis length of ≥20 μm have a dispersion index of 1.1-6. An interface side area is defined from the interface and has a thickness of 25% of T, where the dispersion index is 1.1-6. An intermediate area is defined between the both areas, where the dispersion index is 0.1 to less than 1.
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公开(公告)号：US20200309194A1
公开(公告)日：2020-10-01
申请号：US16828659
申请日：2020-03-24
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Takayoshi YAMAUCHI
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.
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公开(公告)号：US20200300297A1
公开(公告)日：2020-09-24
申请号：US16088369
申请日：2017-03-28
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Kei ISHIKURA , Akihiro KOSE , Kazuaki TODA , Eisaku INOUE
IPC: F16C33/12
Abstract: An Al-based bearing alloy and a slide bearing incorporating the alloy exhibit high corrosion resistance and maintain high strength for a long period of time even in a high temperature environment. The Al-based bearing alloy and slide bearing includes an Al matrix, and acicular compounds which are needle-shaped that precipitate at a plurality of sites in a structure of the Al matrix, and that have a minor diameter and a major diameter.
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公开(公告)号：US10704591B2
公开(公告)日：2020-07-07
申请号：US16416611
申请日：2019-05-20
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Seiji Amano , Toru Watanabe
Abstract: Provided is a semi-cylindrical shaped half bearing. The half bearing has an inner surface forming a sliding surface. The sliding surface includes a plurality of recesses. Each recess has a smooth recess surface recessed from the sliding surface toward an outer diameter side of the half bearing. The recess surface forms a convex curve toward the outer diameter side of the half bearing in a cross-sectional view in any direction perpendicular to the sliding surface. The recess surface includes a plurality of circumferential grooves. The circumferential grooves are recessed from the recess surface toward the outer diameter side of the half bearing. The circumferential grooves extend along a circumferential direction of the half bearing so that smooth surfaces and the circumferential grooves are alternately arranged on the recess surface.
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