초록 ▼

A unidirectional roller chain system for use primarily in automotive engine camshaft drive applications wherein the tooth profile of the sprockets are modified for noise reduction. This new tooth profile is asymmetrical with flank radii that may differ from the drive side to the coast side of the to

A unidirectional roller chain system for use primarily in automotive engine camshaft drive applications wherein the tooth profile of the sprockets are modified for noise reduction. This new tooth profile is asymmetrical with flank radii that may differ from the drive side to the coast side of the tooth. This configuration lowers the overall noise level of the chain drive system by reducing the engagement impact energy as the sprocket collects a roller from the span, and maintaining the chain rollers in hard contact with the root surface in the sprocket wrap.

대표청구항 ▼

[ Having thus described the invention, it is claimed:] [1.] A roller chain sprocket comprising:a plurality of sprocket teeth each having an engaging side and a disengaging side, the engaging sides cooperating with the disengaging sides of adjacent sprocket teeth to define asymmetrical tooth spaces f

[ Having thus described the invention, it is claimed:] [1.] A roller chain sprocket comprising:a plurality of sprocket teeth each having an engaging side and a disengaging side, the engaging sides cooperating with the disengaging sides of adjacent sprocket teeth to define asymmetrical tooth spaces for receiving rollers associated with a roller chain, the rollers and the engaging sides striking together during rotation of the sprocket, and at least one of the asymmetrical tooth spaces being defined by an engaging side roller seating angle (.beta.) that is greater than a disengaging side roller seating angle (.beta.').