公开(公告)号：US20200277988A1

公开(公告)日：2020-09-03

申请号：US16762633

申请日：2018-11-08

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Tetsuya OGAWA ,  Kazuki SAKAI

IPC: F16C33/10 ,  F16C17/04 ,  F16C33/04

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.

公开(公告)号：US10557495B2

公开(公告)日：2020-02-11

申请号：US16142251

申请日：2018-09-26

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Seiji Amano ,  Shinichi Sakurai

IPC: F16C9/04 ,  F16C33/04 ,  F16C33/10 ,  F16C17/02

Abstract: A connecting rod bearing for a crankpin of a crankshaft of an internal combustion engine includes a pair of half bearings forming a cylindrical shape. Each half bearing has a main cylindrical portion including a circumferentially central portion of the half bearing, and crush reliefs formed on both circumferential sides of the main cylindrical portion with a wall thickness being smaller than that of the main cylindrical portion. At least one half bearing has an axial groove which extends in an axial direction on a slide surface of the main cylindrical portion, and is apart from the circumferentially central portion by a circumferential angle of 10° or more toward a forward side in a rotation direction of the crankpin, and apart from the crush relief by a circumferential angle of 10° or more toward the circumferentially central portion.

公开(公告)号：US10422380B2

公开(公告)日：2019-09-24

申请号：US15704197

申请日：2017-09-14

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Takayoshi Yamauchi

IPC: F16C33/20 ,  F16C33/10

Abstract: A sliding member includes a sliding layer including graphite particles dispersed in a synthetic resin matrix. The graphite particles have a volume ratio of 5% to 50% and are composed of spheroidal particles and flake-like particles, respectively having a graphitization degree K1 and K2. The flake-like particles have a volume ratio of 10 to 40% with respect to a total volume of the graphite particles. The spheroidal particles have a cross-sectional structure with AB planes of a graphite crystal laminated from a surface toward a center. The flake-like particles have a cross-sectional structure with the AB planes laminated in a thickness direction. The spheroidal particles and the flake-like particles have an average particle size of 3 to 50 μm, and 1 to 25 μm respectively. K1 is 0.80 to 0.97 and K2 is greater than K1, and a difference K2 −K1 is 0.03 to 0.15.

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

IPC: F16C9/02 ,  F16C17/04

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.

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

IPC: F16C9/02 ,  F16C33/10

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.

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

IPC: F16C9/02 ,  F16C17/04 ,  F16C33/10

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.

公开(公告)号：US20190154084A1

公开(公告)日：2019-05-23

申请号：US16171577

申请日：2018-10-26

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Seiji AMANO ,  Shinichi SAKURAI

IPC: F16C33/10 ,  F16C9/04 ,  F16C17/02 ,  F16C33/04

Abstract: Provided is a semi-cylindrical-shaped half bearing having an inner surface including a center zone and end zones each including a plurality of recesses. Each recess includes a groove forming zone adjacent to the peripheral edge and including a plurality of circumferential grooves extending from the peripheral edge along the circumferential direction. An area ratio S2 of an area of the groove forming zone to an area of the recess in the end zone is larger than an area ratio S1 in the center zone. A maximum depth D4 of the circumferential groove in the end zone is larger than a maximum depth D2 of the circumferential groove in the center zone. A sliding bearing of the present invention includes the above half bearing.

公开(公告)号：US10288118B2

公开(公告)日：2019-05-14

申请号：US15915150

申请日：2018-03-08

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Kazuaki Toda

IPC: F16C33/12 ,  F16C17/10 ,  B32B15/01 ,  B32B15/18 ,  B32B15/20 ,  B22D19/08 ,  B22D27/04 ,  C22C9/02 ,  C22C9/00 ,  C23C30/00 ,  C23C28/00 ,  C23C28/02 ,  B22D13/02 ,  F16C33/14

Abstract: Provided is a sliding material including a substrate; and a copper alloy layer bonded to the substrate. The copper alloy includes 2.0 to 15.0% by mass of tin. The copper alloy layer includes a sliding body part including a sliding surface, and a gradient region including a bond surface with the substrate. A tin concentration in the gradient region reduces from the sliding body part toward the bond surface. A method for producing the siding material is also provided. The method includes preparing the substrate having a first surface and a second surface opposite to the first surface; melting the copper alloy; casting the molten copper alloy on the first surface of the substrate; and solidifying the copper alloy unidirectionally by cooling the substrate from the second surface by a coolant.

公开(公告)号：US10072706B2

公开(公告)日：2018-09-11

申请号：US15730973

申请日：2017-10-12

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Yusuke Uesu ,  Yasushi Saito

IPC: F16C9/02 ,  F16C33/10 ,  F16C17/02 ,  F01M1/06

CPC classification number: F16C33/1065 ,  F01M2001/062 ,  F01M2011/026 ,  F16C3/14 ,  F16C9/02 ,  F16C17/022 ,  F16C17/22 ,  F16C17/26 ,  F16C33/046 ,  F16C33/1045

Abstract: A bearing device includes a crankshaft having a plurality of journal portions, main bearings for supporting the crankshaft, and a bearing housing. The plurality of journal portions includes a first journal portion with a lubricating oil passage and a second journal portion without the lubricating oil passage. The first and second journal portions are supported by the first and second main bearings. The bearing housing includes an upper-side housing and a lower-side housing. A length of a crush relief of at least an upper-side halved bearing of the second main bearing is larger than a length of the crush relief of each of upper-side and lower-side halved bearings of the first main bearing.

公开(公告)号：US09982709B2

公开(公告)日：2018-05-29

申请号：US14806710

申请日：2015-07-23

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Shiho Tanaka ,  Yoshihiro Ozawa

IPC: F16C9/02 ,  F16C17/08 ,  F16C33/04 ,  F16C17/04

CPC classification number: F16C9/02 ,  F16C17/04 ,  F16C17/08 ,  F16C33/046 ,  F16C2360/22

Abstract: The present invention provides a half thrust bearing in a semicircular ring shape for receiving an axial force of the crankshaft of the internal combustion engine, including thrust reliefs formed adjacent to both circumferential end portions of a slide surface which receives the axial force, so that a wall thickness of the half thrust bearing becomes thinner toward the circumferential end portions, wherein at least the thrust relief on a rear side in a rotational direction of the crankshaft has a thrust relief length which becomes larger toward an outer end portion from an inner end portion in a radial direction of the half thrust bearing. The present invention also provides a bearing device including the above half thrust bearing, a crankshaft, a pair of half bearings supporting a journal portion of the crankshaft, and a bearing housing having a holding hole for holding the pair of half bearings.