| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oilless chain which holds lubricating oil between a bushing and a connecting pin for a long time while preventing external leakage, prevents mutual sliding abrasion from occurring between an outer plate and an inner plate, achieves smooth chain drive by reducing frictional resistance of the chain, suppresses deterioration in the lubricating oil, and reduces assembly load of the chain. <P>SOLUTION: In the oilless chain 100, the bushing 120 includes a bushing end surface 120b projecting outward from an outer side surface 110a of the inner plate 110 in a chain width direction; a bushing outer circumferential surface 120c press-fitted to a bushing press-fitting hole 111 of the inner plate 110; and a bushing annular curved surface 120d formed while gradually reducing the diameter from the bushing outer circumferential surface 120c toward the bushing end surface 120b. The outer side surface 110a of the inner plate is arranged by positioning in an area where the bushing annular curved surface 120d is formed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
