JPS5754716A - Main bearing for crankshaft - Google Patents

Main bearing for crankshaft

Info

Publication number
JPS5754716A
JPS5754716A JP12841880A JP12841880A JPS5754716A JP S5754716 A JPS5754716 A JP S5754716A JP 12841880 A JP12841880 A JP 12841880A JP 12841880 A JP12841880 A JP 12841880A JP S5754716 A JPS5754716 A JP S5754716A
Authority
JP
Japan
Prior art keywords
lubricating oil
crankshaft
crankcase
bearing
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12841880A
Other languages
Japanese (ja)
Inventor
Koichi Oba
Nozomi Mizukoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Corp
Yamaha Motor Co Ltd
Original Assignee
Showa Seisakusho Co Ltd
Yamaha Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Showa Seisakusho Co Ltd, Yamaha Motor Co Ltd filed Critical Showa Seisakusho Co Ltd
Priority to JP12841880A priority Critical patent/JPS5754716A/en
Publication of JPS5754716A publication Critical patent/JPS5754716A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

PURPOSE: To keep sufficient lubricating oil in an antifriction bearing which rotatably supports the crankshaft to an engine or the like, by fitting a sealing member between the outer and inner races of the bearing so that the sealing member is located at the side of a crank arm.
CONSTITUTION: Ball bearings 28, 30 are fitted with sealing members 60 at the side of a crankcase 20b and constitute a main bearing which supports a crankshaft 22. Durin the operation of an engine 10, lubricating oil is sucked together with an intake mixture into the crankcase 20b through a passage 48. A portion of the lubricating oil flows in between the crankcase 20b and a side plate 44 and in between the inner race 54 and outer race 56 of the ball bearing 30 to lubricate it. Another portion of the lubricating oil introduced into the crankcase 20b flows to the other ball bearing 28 through a passage 40. When the crankshaft 22 is rotating, the lubricating oil in the ball bearings 28, 30 is kept by the sealing members 60 from flowing out through clearances because of centrifugal force, so that the lubricating oil is always between the inner race 54 and the outer race 56.
COPYRIGHT: (C)1982,JPO&Japio
JP12841880A 1980-09-16 1980-09-16 Main bearing for crankshaft Pending JPS5754716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12841880A JPS5754716A (en) 1980-09-16 1980-09-16 Main bearing for crankshaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12841880A JPS5754716A (en) 1980-09-16 1980-09-16 Main bearing for crankshaft

Publications (1)

Publication Number Publication Date
JPS5754716A true JPS5754716A (en) 1982-04-01

Family

ID=14984261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12841880A Pending JPS5754716A (en) 1980-09-16 1980-09-16 Main bearing for crankshaft

Country Status (1)

Country Link
JP (1) JPS5754716A (en)

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