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111.发明授权公开(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
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.
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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
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.
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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
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.
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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.
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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
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.
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Patent Agency Ranking
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
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：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
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.
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公开(公告)号：US20210246944A1
公开(公告)日：2021-08-12
申请号：US17159549
申请日：2021-01-27
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Hideyuki NAKAJIMA
Abstract: Provided is a sliding member for a thrust bearing. The sliding member includes a back-metal layer and a sliding layer, and has a partially annular shape. The sliding layer includes a synthetic resin and has a sliding surface. In a center line region of the sliding layer, 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 radial 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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119.发明申请公开(公告)号：US20210215204A1
公开(公告)日：2021-07-15
申请号：US17059832
申请日：2019-07-05
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Kwangik NA , Yuji KAWAAI , Tadatoshi NAGASAKI
Abstract: In order to enable a bearing system in which a plurality of bearings operate simultaneously or in association with each other to achieve an optimal overall performance: this bearing system is equipped with a bearing A and a measurement execution unit A therefor, a bearing B and a measurement execution unit B therefor, and a control unit for controlling the measurement execution unit A and the measurement execution unit B; the control unit transmits an instruction to the measurement execution unit A and the measurement execution unit B to enable execution of the performance required of the bearing system. The measurement execution unit A and the measurement execution unit B respectively operate the bearing A and the bearing B under an instructed operation condition. The relationship of an operation condition A of the bearing A and an operation condition B of the bearing B to an index, which indicates each of the operational states of the bearing A and the bearing B when the bearing A and the bearing B are operated under the operation conditions therefor, has been measured and saved in advance. The control unit references the relationship and accordingly transmits an instruction to the measurement execution unit A and the measurement execution unit B.
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公开(公告)号：US20210095712A1
公开(公告)日：2021-04-01
申请号：US17034685
申请日：2020-09-28
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Ryota ITO , Seiji AMANO , Shiho GOTO
Abstract: A semi-cylindrical half bearing for a sliding bearing includes at least one axial groove formed on its inner circumferential surface that includes a smooth groove surface formed back away from the inner circumferential surface toward a radially outer side of the half bearing. The groove surface forms a convex curve toward the radially outer side in a cross-section perpendicular to the axial direction of the half bearing, and forms a straight line extending in the axial direction in a cross-section parallel to the axial direction. The half bearing further includes a plurality of axial narrow grooves formed on the groove surface so as to be back away from the groove surface toward the radially outer side, that extend in the axial direction of the half bearing.
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