Patent Number: 6,332,443

Title: Lubricating oil supplying structure for crankshaft

Abstract: More lubricating oil can be supplied to a connecting rod bearing providedin a connecting rod to provide excellent lubrication between theconnecting rod and a crank pin. A pair of oil groove portions 13a and 13bis provided in an inner circumferential surface portion 17 of a crankjournal bearing 11, which extends in the movement direction of a piston 32and which is disposed opposite to each other. A lubricating oil supplyingpassage 28 is provided between the crank journal 10 and the crank pin 20,one end portion 29 of which is opened to the groove portions 13a and 13bprovided in the crank journal bearing 11, the other end portion 30 ofwhich is opened to an inner circumferential surface portion 23 of theconnecting rod bearing 22, and which supplies the lubricating oil to theconnecting rod bearing 22.

Inventors: Kaita; Keiji (Susono, JP)


International Classification: F01M 1/06 (20060101); F01M 001/06 ()

Expiration Date: 12/25/2014