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公开(公告)号：US20190360520A1
公开(公告)日：2019-11-28
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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公开(公告)号：US20190264732A1
公开(公告)日：2019-08-29
申请号：US16258882
申请日：2019-01-28
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Seiji AMANO , Toru WATANABE
Abstract: Provided is a semi-annular shaped half thrust bearing. The half thrust bearing has a sliding surface and a back surface opposite to the sliding surface. The sliding surface includes a plurality of recesses. Each recess has a recess surface recessed from the sliding surface toward the back surface. The recess surface is convex toward the back surface in cross-sectional view in a center line direction of the half thrust bearing. The recess surface includes a plurality of grooves. The grooves are recessed from the recess surface toward the back surface. The grooves extend in the center line direction so that smooth surfaces and the grooves are alternately arranged on the recess surface in a horizontal direction of the half thrust bearing.
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公开(公告)号：US20190249711A1
公开(公告)日：2019-08-15
申请号：US16256035
申请日：2019-01-24
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Seiji AMANO , Toru WATANABE
CPC classification number: F16C9/02 , F16C33/1065
Abstract: A main bearing for a journal portion of a crankshaft includes a pair of upper and lower half bearings combined with each other to form a cylindrical shape. Only the upper half bearing includes an oil groove formed on its inner peripheral surface to extend in a circumferential direction, an oil hole piercing from the oil groove to an outer peripheral surface of the upper half bearing, and a plurality of axial grooves formed on its inner peripheral surface to extend in an axial direction so as to intersect with the oil groove. A groove depth D2 of the axial groove is not more than 10% of a groove depth D1 of the oil groove, and an axial length L2 of the axial groove is not less than 70% of an axial length L1 of the upper half bearing.
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公开(公告)号：US20190195272A1
公开(公告)日：2019-06-27
申请号：US16196034
申请日：2018-11-20
Applicant: DAIDO METAL COMPANY LTD.
Inventor： Seiji AMANO , Toru WATANABE
CPC classification number: F16C9/02 , F16C17/04 , F16C17/045 , F16C33/046 , F16C33/103 , F16C33/1065 , F16C33/107 , F16C2360/22
Abstract: Provided is a semi-annular-shaped half thrust bearing having a sliding surface for receiving an axial force and a back surface opposite to the sliding surface. The sliding surface includes a plurality of recesses. Each recess has a recess surface recessed from the sliding surface toward the back surface of the half thrust bearing. The recess surface is convex toward the back surface of the half thrust bearing in cross-sectional view in a circumferential direction of the half thrust bearing. The recess surface includes a plurality of circumferential grooves recessed from the recess surface toward the back surface of the half thrust bearing. The circumferential grooves extend along the circumferential direction of the half thrust bearing, and smooth surfaces and the circumferential grooves are alternately arranged on the recess surface.
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