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公开(公告)号：US12196262B2
公开(公告)日：2025-01-14
申请号：US17839622
申请日：2022-06-14
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Ayako Yamamoto , Yoshifumi Ito
Abstract: The present invention provides a sliding member which enables further reduction of friction and improvement of seizure resistance without deteriorating wear resistance of a sliding surface. The sliding member includes a porous metal base material, and a resin material with which the porous metal base material is impregnated. The sliding member includes an exposed sliding surface. The sliding surface includes a top surface made of the resin material, and a bottom surface made of the porous metal base material. A height from the bottom surface to the top surface is 10 to 30 μm, and the resin material includes fluorine resin.
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公开(公告)号：US20240318687A1
公开(公告)日：2024-09-26
申请号：US18583374
申请日：2024-02-21
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Hideyuki HARADA , Kentaro TSUJIMOTO , Yuma HANEDA , Yuhei MAEGAWA
CPC classification number: F16C33/121 , B32B15/01
Abstract: A sliding member of the present embodiment includes: a lining layer including a Bi phase; and a coating layer containing Ni, the coating layer being provided on a surface of the lining layer, the coating layer partially forming an entrance portion that has entered the lining layer side at an interface with respect to the lining layer. At any observation region including the interface between the lining layer and the coating layer, a value R=S1/S2 of a ratio of a maximum area S1 of the Bi phase included in the lining layer to a maximum area S2 of the entrance portion that has entered the lining layer is 1.00≤R≤9.00.
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公开(公告)号：US20240255019A1
公开(公告)日：2024-08-01
申请号：US18424937
申请日：2024-01-29
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Seiji SANO
CPC classification number: F16C9/02 , F16C33/046
Abstract: In a half thrust bearing for a crankshaft, a slide surface includes at least two oil grooves extending in a radial direction, pad surfaces located on both circumferential sides of each oil groove, a first inclined surface formed on a forward side of the oil groove in a rotation direction of the crankshaft, and a second inclined surface formed on a backward side of the oil groove in the rotation direction. Each of the first and second inclined surfaces has a circumferential length which varies along the radial direction and includes a ridge portion at a radial position where the circumferential length is minimum. The axial thickness of each of the first and second inclined surfaces is maximum at the ridge portion in the radial direction and become smaller from the ridge portion toward a radially inner end and toward a radially outer end.
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公开(公告)号：US12018566B2
公开(公告)日：2024-06-25
申请号：US17483869
申请日：2021-09-24
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Akiyoshi Imamura , Yu Suzuki , Marina Oguri
CPC classification number: F01B13/061 , F01B1/0644 , F01B1/0651 , F02B57/10
Abstract: A bearing device includes a piston arranged in a cylinder of a rotor, and a half bearing mounted on the piston to support a roller. The piston includes a recessed holding surface, and holding side surfaces on both axial sides thereof. Each holding side surface includes a ridge portion having an arc-shaped or elliptic-arc-shaped profile protruding toward a radially inner side of the piston. The half bearing includes a partially cylindrical portion, and protruding portions protruding from axial end faces thereof. Each protruding portion has a protruding portion end face which includes a central recessed surface, and two support recessed surfaces located on both circumferential sides thereof, that have an arc shape or an elliptic arc shape to correspond to the profile of the ridge portion, so that only the two support recessed surfaces are in contact with the ridge portion.
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公开(公告)号：US11786969B2
公开(公告)日：2023-10-17
申请号：US17711227
申请日：2022-04-01
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Ayako Yamamoto , Yoshifumi Ito , Norihito Watanabe , Hirotaka Inoue , Akihiro Matsuoka
CPC classification number: B22F7/04 , B22F3/1146 , B22F3/26 , B32B3/02 , B32B5/16 , B32B15/08 , F16C33/122 , B22F2003/247 , B22F2301/10 , B32B2260/025 , B32B2260/046 , B32B2264/105 , B32B2307/746 , Y10T428/12396
Abstract: Provided is a method for producing a sliding member formed by impregnating a porous base member made of a bronze-based alloy with a resin material, the sliding member including a sliding surface where both the porous base member and the resin material are exposed, the method including: a step of preparing a back metal layer; a porous base member formation step of forming the porous base member by depositing particles of the bronze-based alloy on a surface of the back metal layer and sintering the particles; an impregnation step of impregnating the porous base member with the resin material; a deformation step of deforming an end edge of the back metal layer in a direction away from the sliding surface; and a cutting step of cutting the porous base member impregnated with the resin material to form the sliding surface.
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Patent Agency Ranking
公开(公告)号：US11614122B2
公开(公告)日：2023-03-28
申请号：US17500584
申请日：2021-10-13
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Na Li , Erina Yasuda
Abstract: A sliding member includes an overlay layer made of a resin on a side of a sliding surface of a bearing alloy layer. When a valley void volume Vvv (μm3/μm2) in the sliding surface of the overlay layer is defined as Vv1, Vv1 is in a range of 0.015≤Vv1≤0.200.
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公开(公告)号：US20230069203A1
公开(公告)日：2023-03-02
申请号：US17882674
申请日：2022-08-08
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Keisuke SHINODA , Tomohiro YAMADA , Satoshi KAMIYA
IPC: F16C9/02
Abstract: Provided is a half bearing constituting a sliding bearing that is unlikely to cause damage during an operation of an internal combustion engine. The half bearing includes at least one protrusion, and the protrusion projects outward in a radial direction from an outer circumferential surface. A recessed portion that is recessed inward in the radial direction from the outer circumferential surface is formed over the entire inner-circumferential length between the protrusion and a circumferential-direction end surface of the half bearing. Two radial-direction grooves are formed in the circumferential-direction end surface of the half bearing relative to the protrusion, and each of the radial-direction grooves is adjacent to each of recessed portion side surfaces. The radial-direction grooves extend in the radial direction along the recessed portion side surfaces and are separated from the recessed portion at a midpoint of the extension. An inner circumferential surface-side end portion in an extending direction of the radial-direction grooves is located between a recessed portion bottom surface and an inner circumferential surface of the half bearing. A groove width and a groove depth of the radial-direction grooves decrease from the position separated from the recessed portion toward the inner circumferential surface-side end portion and reach zero at the inner circumferential surface-side end portion.
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公开(公告)号：US20220314318A1
公开(公告)日：2022-10-06
申请号：US17711227
申请日：2022-04-01
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Ayako YAMAMOTO , Yoshifumi ITO , Norihito WATANABE , Hirotaka INOUE , Akihiro MATSUOKA
Abstract: Provided is a method for producing a sliding member formed by impregnating a porous base member made of a bronze-based alloy with a resin material, the sliding member including a sliding surface where both the porous base member and the resin material are exposed, the method including: a step of preparing a back metal layer; a porous base member formation step of forming the porous base member by depositing particles of the bronze-based alloy on a surface of the back metal layer and sintering the particles; an impregnation step of impregnating the porous base member with the resin material; a deformation step of deforming an end edge of the back metal layer in a direction away from the sliding surface; and a cutting step of cutting the porous base member impregnated with the resin material to form the sliding surface.
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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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