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：US10072705B2

公开(公告)日：2018-09-11

申请号：US15636693

申请日：2017-06-29

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Yusuke Uesu ,  Yasushi Saito

IPC: F16C33/66 ,  F16C33/10 ,  F16C17/02 ,  F16C3/04

CPC classification number: F16C33/1065 ,  F16C3/04 ,  F16C3/14 ,  F16C9/02 ,  F16C17/022 ,  F16C17/26 ,  F16C33/046 ,  F16C33/1055 ,  F16C33/6666 ,  F16C35/02 ,  F16C2204/10 ,  F16C2204/20

Abstract: The provided is a bearing device for a crankshaft of an internal combustion engine including: a crankshaft having a plurality of journal portions; main bearings for supporting the crankshaft; and a bearing housing, wherein a range in which the oil groove of the upper-side halved bearing of the second main bearing is formed in the circumferential direction includes at least a range of a circumferential angle of 20° within the ±45° region, a circumferential end portion of the oil groove on a rotationally forward side communicates with the crush relief at a minimum, and is open to a circumferential end face at a maximum, and a circumferential end portion of the oil groove on the rotationally backward side of the journal portion is positioned on a circumferential center portion side of the upper-side halved bearing from a circumferential end face of the upper-side halved bearing.

公开(公告)号：US10072699B2

公开(公告)日：2018-09-11

申请号：US15480488

申请日：2017-04-06

Applicant: DAIDO METAL COMPANY LTD.

Inventor： Yusuke Uesu ,  Yasushi Saito

IPC: F16C9/02 ,  F16C33/04 ,  F01M1/06 ,  F01M11/02 ,  F16C3/14 ,  F16C33/10 ,  F02F7/00

CPC classification number: F16C9/02 ,  F01M1/06 ,  F01M11/02 ,  F01M2001/062 ,  F01M2011/026 ,  F02F7/0053 ,  F16C3/14 ,  F16C17/022 ,  F16C17/26 ,  F16C33/046 ,  F16C33/1055 ,  F16C33/1065 ,  F16C35/02

Abstract: The bearing apparatus 1 includes a crankshaft having multiple journals, main bearings supporting the crankshaft, and a bearing housing. The plurality of journals include a first journal with a lubricating oil passage and a second journal without a lubricating oil passage. The first and second journals are supported by first and second main bearings, respectively. The bearing housing is constituted by an Al-alloy upper housing and an Fe-alloy lower housing. The depth of the oil groove of the upper half bearing of the second main bearing at least in a ±45° region is equal to or smaller than a half of the depth of the oil groove of the upper half bearing of the first main bearing in the ±45° region.