Patent ID: 8092326
Filing Date: 2012-01-10
Classification: F16D,F16H

Abstract:
1. A vehicular power transmission apparatus comprising: an engine; a crank pulley connected to a crankshaft of the engine; a motor generator; a motor generator pulley comprising: an accessory; an accessory pulley connected to an input shaft of the accessory; a first power transmission unit adapted to transmit power by laying a first transmission member at least around the crank pulley and the first pulley; a second power transmission unit adapted to transmit power by laying a second transmission member at least around the second pulley and the accessory pulley; a mechanical clutch adapted to engage and disengage between the first pulley and the second pulley; and a switching unit adapted to switch the mechanical clutch so as to inhibit an engagement therebetween when at least one of the first pulley and the second pulley serves as a drive element, wherein the mechanical clutch and the switching unit are provided in the motor generator pulley; wherein the second pulley comprises an extension portion which axially extends towards the first pulley, the extension portion comprises a plurality of cam surfaces, a cavity is defined between an inner circumferential surface of the first pulley and the extension portion of the second pulley, a plurality of rolling elements, a cage is disposed between the cam surface and the inner circumferential surface of the first pulley for holding each rolling element therebetween, and the mechanical clutch comprises the cam surface, the inner circumferential surface of the first pulley, the plurality of rolling elements, and the cage; and wherein the switching unit comprises: the claw is adapted to be inserted and removed from between the first and second grooves so as to fix a position of the cage and release the position of the cage, respectively.