US 5,671,836 AGranted

Lubrication system for one-way clutch

AssigneeNSK-Warner K.K.

InventorsHirobumi Shirataki, Atsushi Sagae, Toshio Awaji

Life of this patent

Estimating the term…

Loading patent…

Abstract

A lubrication system is disclosed for a one-way clutch of the type that lubeoil is fed into the one-way clutch by shaft-center oiling or under a centrifugal force. The lubrication system comprises oil grooves and an oilway. The oil grooves are formed in an inner peripheral wall of at least one of end bearings arranged on axially opposite sides of the one-way clutch, respectively, whereby lubeoil is drawn into the one-way clutch through the oil grooves. The oilway, on the other hand, opens through an outer peripheral wall of an associated inner ring in a region where the outer peripheral wall of the inner ring and the inner peripheral wall of said at least one end bearing undergo relative sliding motion. The outer peripheral wall of the inner ring is free of any oilway opening in a region where associated sprags are operatively brought into sliding contact with the outer peripheral wall of the inner ring.

Claims7

Dependent claims

A lubrication system for a one-way clutch having an inner ring, an outer ring and end bearings arranged on axially opposite sides, said one-way clutch being of a type wherein lubeoil is fed into said one-way clutch by shaft-center oiling or under a centrifugal force, comprising:

oil grooves formed in an inner peripheral wall of at least one of the end bearings said oil grooves having depths less than corresponding wall thicknesses of the end bearings whereby lubeoil is drawn through said oil grooves for application into said one-way clutch;
and
an oilway opening through an outer peripheral wall of an associated inner ring in a region where said outer peripheral wall of said inner ring and said inner peripheral wall of said at least one end bearing undergo relative sliding motion, said outer peripheral wall of said inner ring being free of any oilway opening in a region where associated sprags are operatively brought into sliding contact with said outer peripheral wall of said inner ring.

Dependencies are inferred from the claim text.