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公开(公告)号：US11441600B2
公开(公告)日：2022-09-13
申请号：US17159590
申请日：2021-01-27
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Hideyuki Nakajima
IPC: F16C17/03 , F16C33/20 , C08K3/04 , C08K3/16 , C08K3/34 , C08K7/06 , C08K7/10 , C08L61/16 , F16C17/02
Abstract: Provided is a sliding member for a journal bearing. The sliding member includes a back-metal layer and a sliding layer, and has a partially cylindrical shape. The sliding layer includes a synthetic resin and has a sliding surface. The sliding layer has a linear expansion coefficient KS in a direction parallel to a circumferential direction of the sliding member, a linear expansion coefficient KJ in a direction parallel to a center axis direction of the sliding member, and a linear expansion coefficient KT in a direction perpendicular to the sliding surface, and the linear expansion coefficients KS, KJ, and KT satisfy the following relations (1) and (2): Relation (1): 1.1≤KS/KJ≤2; and Relation (2): 1.3≤KT/{(KS+KJ)/2}≤2.5.
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公开(公告)号：US11215227B2
公开(公告)日：2022-01-04
申请号：US16931704
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. A cross-sectional structure of the sliding layer includes first copper alloy grains in contact with a bonding surface and second copper alloy grains not in contact with the bonding surface. The first and second grains have an average grain size D1 and D2 respectively. D1 is 30 to 80 μm; and D1/D2=0.1 to 0.3. In the cross-sectional structure, the second grains includes third grains that includes internal grains therein that are not in contact with a grain boundary of the third grains. A total area S1 of the third grains and a total area of the second copper alloy grains S2 satisfy: S0/S2=0.25 to 0.80.
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公开(公告)号：US20210140475A1
公开(公告)日：2021-05-13
申请号：US17086816
申请日：2020-11-02
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Yoshifumi Ito , Yu Suzuki , Takayoshi Yamauchi
IPC: 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.
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公开(公告)号：US20200309193A1
公开(公告)日：2020-10-01
申请号：US16828563
申请日：2020-03-24
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Takayoshi YAMAUCHI
Abstract: A sliding member for a journal 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, axi and Dsur, cir respectively in an axial and circumferential cross-section in the sliding surface side region, and Dint, axi and Dint, cir respectively in axial and circumferential cross-sections in the interface side region. Dsur, axi and Dint, cir are 5-30 μm, and Dsur, cir and Dint, axi are 5 to 20% of respectively Dsur, axi and Dint, cir. 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 axial cross-section and in the interface side region in view of the circumferential cross-section.
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公开(公告)号：US20200256382A1
公开(公告)日：2020-08-13
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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Patent Agency Ranking
公开(公告)号：US10601283B2
公开(公告)日：2020-03-24
申请号：US15901552
申请日：2018-02-21
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Kwangik Na , Motohira Yamada , Shigeyoshi Mori
IPC: H02K5/16 , H02K5/20 , H02K7/14 , H02K9/06 , H02K9/19 , H02K5/167 , F16C17/04 , F16C17/02 , F16C33/10 , F16C17/24 , F16C17/26 , F16C37/00
Abstract: A cooling portion has an air inlet into which cooling air flows and is positioned in a preset range. When a distance from the upper to lower ends of an oil chamber in the axial direction of a rotating shaft member is h, and the shortest distance between an outer peripheral face of a casing and an inner peripheral face of a cover is a, the preset range is set in the following manner. Specifically, the preset range is set between ¼h upward and 5/4h downward relative to the upper end of the oil chamber as a reference point, in the axial direction of the rotating shaft member. Additionally, the preset range is set between the outer peripheral face of the casing and relative to the outer peripheral face of the casing as a reference point, in the radial direction of the rotating shaft member.
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公开(公告)号：US10408256B2
公开(公告)日：2019-09-10
申请号：US15986962
申请日：2018-05-23
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Shinichi Sakurai
Abstract: A half thrust bearing includes a sliding surface for receiving an axial force of a crankshaft of an engine, and a rear surface on an opposite side thereto. The sliding surface includes a flat surface portion near a circumferentially central portion, and two inclined flat surface portions on both circumferential sides of the flat surface portion. The axial distance between the rear surface and the sliding surface is maximum at the flat surface portion. At any radial positions, the axial distance in each inclined flat surface portion is maximum on a circumferentially central portion side and is reduced toward a circumferential end portion of the half thrust bearing. Each inclined flat surface portion is arranged to form one constant thickness portion extending linearly from a radially inner end to a radially outer end at a circumferential angle of 45°.
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公开(公告)号：US20190218646A1
公开(公告)日：2019-07-18
申请号：US16336534
申请日：2017-06-08
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Kazuaki TODA
CPC classification number: C22C9/00 , B22D13/02 , B22D19/00 , B22D19/16 , B22D27/04 , B22D27/045 , B32B15/015 , C22C1/00 , C22C1/02 , C22C9/01 , C22C9/02 , C22C9/04 , C22C9/05 , C22C9/06 , C22C9/10 , F16C33/12 , F16C33/121 , F16C33/14 , F16C2204/18
Abstract: Provided are a slide material in which the joining strength between a Bi-containing copper alloy layer and a substrate is improved, and a method for manufacturing the slide material. The slide material according to the present invention has a substrate and a copper alloy layer. The copper alloy layer comprises a copper alloy containing 4.0-25.0 mass % of Bi and has a structure in which Bi phases are scattered in a copper alloy structure. The contact area ratio of Bi phases of the copper alloy layer at the joining interface with the substrate is not more than 2.0%. The slide material is manufactured by casting a molten copper alloy onto a substrate and causing the copper alloy to solidify unidirectionally.
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公开(公告)号：US10309139B2
公开(公告)日：2019-06-04
申请号：US16052855
申请日：2018-08-02
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Takayoshi Yamauchi
Abstract: Provided is a guide roller for a vehicular slide door. The guide roller has an annular metal inner ring; a retainer holding a bearing; an annular metal outer ring and a sliding layer including a synthetic resin. When the sliding layer is sectionalized into a sliding surface side area, an intermediate area and an interface side area, from the sliding surface to an interface with the outer ring, the synthetic resins in the sliding surface side area, the intermediate area and the interface side area have, respectively, a degree of crystallizations X1, X2 and X3 and nanoindenter hardnesses Y1, Y2 and Y3 wherein X2−X1 is less than 5%, and X2−X3 is less than 5% and wherein Y2 is not less than 115% of Y1, and Y2 is not less than 115% of Y3.
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公开(公告)号：US20190128325A1
公开(公告)日：2019-05-02
申请号：US16142345
申请日：2018-09-26
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Seiji AMANO , Shinichi SAKURAI
Abstract: A main bearing for a journal portion of a crankshaft includes a pair of upper and lower half bearings forming a cylindrical shape. Each half bearing includes a main cylindrical portion including a circumferentially central portion and having a slide surface, and crush reliefs formed on both circumferential sides of the slide surface. Only the upper half bearing includes an oil groove on its inner peripheral surface, and an oil hole pierced from the oil groove to an outer peripheral surface. The lower half bearing includes an axial groove on the slide surface that is arranged apart from the circumferentially central portion toward the forward side by a circumferential angle of 10° or more, and apart from the crush relief located on the forward side by a circumferential angle of 10° or more.
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