초록 ▼

A chain device including a sprocket wheel, a buffer ring provided on one side of the sprocket wheel for rotation relative thereto, and a chain meshing therewith. The buffer ring has an outer diameter greater than the inner-diameter dimension of a semicircular-shaped portion of the chain which is in

A chain device including a sprocket wheel, a buffer ring provided on one side of the sprocket wheel for rotation relative thereto, and a chain meshing therewith. The buffer ring has an outer diameter greater than the inner-diameter dimension of a semicircular-shaped portion of the chain which is in meshing engagement with the sprocket wheel. Thus, when the chain and sprocket wheel are in meshing engagement with each other, the buffer ring is restrained and forced by the inner-diameter part of the semicircular-shaped portion of the chain, so that the ring is deformed into an elliptical shape. Each of the link plates which form the chain includes a depressed portion having a curved shape coinciding, in its radius of curvature, to the maximum radius of curvature of the elliptically-deformed buffer ring. Such curved shape of the depressed portion of the link plate contributes to the improvement of durability of the buffer ring, as well as to reduction of chain noise.

대표청구항 ▼

a chain device comprising: a sprocket wheel; a buffer ring provided on one side of said sprocket wheel for rotation relative thereto; a chain meshing with said sprocket wheel, said chain including a plurality of link plate pairs; said buffer ring having an outer diameter greater than the inner diame

a chain device comprising: a sprocket wheel; a buffer ring provided on one side of said sprocket wheel for rotation relative thereto; a chain meshing with said sprocket wheel, said chain including a plurality of link plate pairs; said buffer ring having an outer diameter greater than the inner diameter dimension of a semicircular-shaped portion of said chain which is in mesh with said sprocket wheel; and each of said link plates being provided with a depressed portion having a curved shape coinciding, in the radius of curvature thereof, with the maximum radius of curvature of the outer periphery of said buffer ring when said buffer ring is deformed into an elliptical shape by meshing engagement between said chain and said sprocket wheel.