Patent ID: 6283076
Filing Date: 2001-09-04
Classification: F16H,Y10T

Abstract:
An engine balance shaft drive comprising:an engine crankshaft having a compliant crankshaft sprocket disposed thereon;at least one balance shaft having a balance shaft sprocket disposed thereon;a chain drivingly engaging said crankshaft sprocket and said balance shaft sprocket;said compliant crankshaft sprocket having a hub portion secured to said crankshaft and a rim portion, said hub portion having a plurality of radially extending splines, said rim portion located radially about said hub portion and having an inner surface with keyways positioned and adapted to receive said radially extending splines,a plurality of spaced teeth on an outer periphery of said sprocket rim adapted for engagement with said chain;an elastomeric member disposed between said sprocket hub portion and said sprocket rim portion, said elastomeric member being located between said keyways and said splines to form a compliant member therebetween, said compliant member acting to absorb torsional vibrations from said crankshaft and minimize transmittal of said vibrations through said chain to said balance shaft.