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公开(公告)号：US20190154084A1
公开(公告)日：2019-05-23
申请号：US16171577
申请日：2018-10-26
发明人： Seiji AMANO , Shinichi SAKURAI
摘要： 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.
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公开(公告)号：US20180355910A1
公开(公告)日：2018-12-13
申请号：US15978345
申请日：2018-05-14
发明人： Shinichi SAKURAI
CPC分类号： F16C17/047 , F02F7/0053 , F16C9/02 , F16C9/03 , F16C17/04 , F16C33/046 , F16C33/1075 , F16C2300/22 , F16C2360/22
摘要： A half thrust bearing having a semi-annular shape includes a sliding surface for receiving an axial force of a crankshaft of an internal combustion engine, and a rear surface on an opposite side of the sliding surface, and defines a reference plane on the rear surface side that is perpendicular to an axial direction. The sliding surface includes a flat surface portion near a circumferentially central portion and in parallel with the reference plane, and inclined surface portions on both sides of the flat surface portion in a circumferential direction. At any radial positions of the half thrust bearing, an axial distance between the reference plane and the sliding surface is maximum at the flat surface portion, and is reduced in the inclined surface portions toward both circumferential end portions of the half thrust bearing.
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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
发明人： Seiji AMANO , Shinichi SAKURAI
摘要： 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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公开(公告)号：US20190032701A1
公开(公告)日：2019-01-31
申请号：US16038338
申请日：2018-07-18
发明人： Seiji AMANO , Akifumi YAMAMOTO , Shinichi SAKURAI
摘要： Provided is a semi-cylindrical shaped half bearing. The half bearing has an inner surface forming a sliding surface and including a plurality of recesses. Each recess has a smooth recess surface and a peripheral edge. The recess surface forms a convex curve toward the outer diameter side of the half bearing in cross-sectional view in a direction parallel to a circumferential direction of the half bearing. The recess includes a groove forming zone adjacent to the peripheral edge of the recess. The groove forming zone includes a plurality of circumferential grooves. The circumferential grooves extend from the peripheral edge of the recess along the circumferential direction of the half bearing. The present invention also provides a cylindrical sliding bearing including the above half bearing.
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公开(公告)号：US20190128318A1
公开(公告)日：2019-05-02
申请号：US16142251
申请日：2018-09-26
发明人： Seiji AMANO , Shinichi SAKURAI
CPC分类号： F16C9/04 , F16C17/022 , F16C33/046 , F16C33/1065
摘要： 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.
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公开(公告)号：US20180355907A1
公开(公告)日：2018-12-13
申请号：US15986962
申请日：2018-05-23
发明人： Shinichi SAKURAI
CPC分类号： F16C9/02 , F02F7/0053 , F16C9/03 , F16C17/04 , F16C17/047 , F16C17/102 , F16C33/046 , F16C33/103 , F16C33/1075 , F16C43/02
摘要： 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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