Eccentric Pulley For Inelastic Timing Belt

Eccentric pulley for inelastic timing belt

Apparatus for maintaining substantially constant tension in an inelastic timing belt pulley driven by a rigid, swinging arm, including a driven, circular pulley, an eccentrically mounted, circular idler pulley, an inelastic timing belt pulley mounted about the driven and idler pulleys to provide minimum tension at mid-motion and maximum tension at the start and end of motion, and a rigid swinging arm pivotably mounted equidistant from the centers of the driven and idler pulleys and secured at one end to the timing belt pulley.

Driving force transmission mechanism using a timing belt pulley for an internal combustion engine

A driving force transmission mechanism is described comprising: a timing pulley having teeth, each of the teeth having a width perpendicular to a direction of movement of the teeth; and a timing belt pulley engaging the timing pulley, the timing belt pulley having teeth, each of the timing belt pulley teeth having a width perpendicular to a direction of movement of the timing belt pulley teeth; a width of the timing belt pulley not being larger that a width of the timing pulley; the width of the teeth of the timing belt pulley at dedendums of the teeth being larger than a width of engagement of the teeth of the timing belt pulley with the teeth of the timing pulley; at least one of width end portions of the teeth of the timing pulley and width end portions of the teeth of the timing belt pulley being cut out so that width end portions of the teeth of the timing belt pulley at dedendums of the timing belt pulley do not contact the teeth of the timing pulley.