Silent chain

摘要

Link plates connected together by connecting members to form an endless silent chain each include a pair of teeth and a pair of connecting holes each receiving therein one of the connecting members. The teeth each have an outer flank, an arcuate tip end portion, and an inner flank. The outer flank has a rectilinear tooth face having an intermeshing point, and a tooth length extending from the intermeshing point toward a tip end of each tooth. The tooth length is 5 to 15% of a pitch between the connecting members. The tip end portion has a first arc adjacent to the outer flank and a second arc adjacent to the inner flank, the second arc having a smaller radius of curvature than the first arc. The shortest distance from a junction between the first and second arcs of the arcuate tip end portion to a face angle forming line of the outer flank is 0.5 to 3.0% of the pitch between the connecting members. With this construction, the silent chain can decrease a collision speed with respect to the tooth face of a sprocket at the time of intermeshing to thereby reduce noises, and provide a smooth and positive intermeshing with the sprocket.