Patent ID: 6394250
Filing Date: 2002-05-28
Classification: F16D

Abstract:
An alternator pulley unit with a built-in-one-way clutch comprising a sleeve that can be freely externally fitted and secured to a rotation shaft of the alternator; a driven pulley disposed concentric with the sleeve around the sleeve; a one-way clutch provided between an axially intermediate portion on an outer peripheral face of the sleeve and an axially intermediate portion on an inner peripheral face of the driven pulley, which can freely transmit a turning force between the driven pulley and the sleeve, only when the driven pulley tends to rotate relative to the sleeve in a predetermined direction; and a pair of support bearing provided between the outer peripheral face of the sleeve an the inner peripheral face of the driven pulley to hold the one-way clutch from the axially opposite sides, which enable free rotation of the sleeve and the driven pulley relative to each other, while rotatably supporting a radial load applied to the driven pulley, wherein a torque necessary for rotating the driven pulley relative to the sleeve in the direction opposite to the predetermined direction is limited up to 0.5NÂ·m.