Patent ID: 9500269
Filing Date: 2016-11-22
CPC Classification: F01L,F16C,F16H,Y10T

Claim Text:
1. A method for lubricating a cam follower of a rocker arm comprising the steps of: a) providing a cam follower for a rocker arm, the cam follower further comprising: a cylindrical outer ring having an outer circumference surface abutting on a cam; a support shaft to support said cylindrical outer ring; a plurality of rollers arranged in an annular region between said support shaft and said cylindrical outer ring; and a pair of side plates, each side plate composed of a ring-shaped disk penetrated by said support shaft and opposed to an end face of each of said plurality of rollers, wherein said side plate has a surface hardness of Hv 550 or more and surface roughness of 0.8 micrometers or less in terms of an arithmetic average roughness Ra, and is arranged at each end of each of said plurality of rollers, and a relationship Lk<Lr<Lk+2t is satisfied in which Lk represents a shaft length of each of said plurality of rollers, Lr represents a shaft length of said cylindrical outer ring, and t represents a thickness of said side plate, an outer diameter of said side plate is smaller than an inner diameter of said cylindrical outer ring so that an annular space is formed between said side plate and said cylindrical outer ring, b) supplying lubricant oil to the cam follower, the lubricant oil supplied to the cam follower being poured to said annular space and then being poured from said annular space to said roller for lubrication of the cam follower.