Patent ID: 6213904
Filing Date: 2001-04-10
Classification: B65G,F16G,F16H

Abstract:
A low-noise chain member, comprising:a pair of inner plates each having a bushing hole therein;a pair of outer plates each having a pin hole therein;a chain pin inserted through each of said pin holes and each of said bushing holes and secured at opposite ends thereof to said outer plates;a hollow tubular bushing having opposite ends which are press-fitted into said bushing holes to secure said bushing to said inner plates, said bushing having an axially curved outer face extending between said opposite ends of said bushing;a hollow cylindrical roller rotatably supported on said bushing and having opposite ends and an axially curved inner face extending between said opposite ends of said roller, said inner face being complementary in contour to said curved outer face of said bushing so that a clearance between the curved outer face of said bushing and the curved inner face of the hollow cylindrical roller is not widened near each end of said hollow cylindrical roller; andat least one of said outer face of said bushing and said inner face of said roller having a plurality of oil grooves therein which extend in an axial direction of said at least one of said bushing and said roller and are spaced circumferentially about said at least one of said bushing and said roller.