Patent ID: 6464057
Filing Date: 2002-10-15
Classification: F16D

Abstract:
A pulley unit with a built-in-one-way clutch comprising a sleeve that can be freely externally fitted and secured to a rotatable shaft; a 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 pulley, which can freely transmit a turning force between the pulley and the sleeve, only when the pulley tends to rotate relative to the sleeve in a predetermined direction; and a pair of support bearings provided between the outer peripheral face of the sleeve and the inner peripheral face of the pulley to hold the one-way clutch from the axially opposite sides, which enable free rotation of the sleeve and the pulley relative to each other, while rotatably supporting a radial load applied to the pulley, wherein a torque necessary for rotating the pulley relative to the sleeve in the direction opposite to the predetermined direction is limited up to 0.5 Nâ€¢m.