Patent ID: 6749050
Filing Date: 2004-06-15
Classification: F16H

Abstract:
A pulley apparatus with built-in one-way clutch comprising: a sleeve adapted to be connected and fastened to a tip end of a rotating shaft; a pulley located around the sleeve such that it is concentric with the sleeve; a one-way clutch located in the space between the middle section in the axial direction of the outer peripheral surface of the sleeve and the middle section in the axial direction of the inner peripheral surface of the pulley such that it can transmit rotating power between the pulley and sleeve only when the pulley is inclined to rotate in a predetermined direction relative to the sleeve; and a pair of support bearings each having a seal on either axial side and located on both sides in the axial direction of the one-way clutch between the outer peripheral surface of the sleeve and the inner peripheral surface of the pulley to support the radial load applied to the pulley and make it possible for the sleeve and pulley to rotate with respect to each other, the one-way clutch being a roller clutch comprising: an outer ring for the one-way clutch fitted into and fixed around the inner peripheral surface in the middle section in the axial direction of the pulley; an inner ring for the one-way clutch fitted onto and fixed around the outer peripheral surface in the middle section in the axial direction of the sleeve; and a plurality of rollers held by a clutch retainer between the outer ring and inner ring for the one-way clutch, the support bearings having inner bearing races fitted onto and fixed around the outer peripheral surfaces on both end portions in the axial direction of the sleeve, wherein the diameter of the inscribed circle of the inner peripheral surface on both ends in the axial direction of the clutch retainer is less than the outer diameter of one of the end surfaces in the axial direction of the inner bearing races that faces the clutch retainer.