| 摘要 |
<p>A power transmission apparatus consists of a transmission shaft (25) to transmit an input power, a pair of driven transmission shafts (27, 31) which are capable of rotating relative to the transmission shaft, a differential device (47) which connects said pair of driven transmission shafts and allows a differential rotation therebetween, and differential limitation means which limits the differential rotation when the velocity of the rotation of the differential rotation exceeds a predetermined value.</p><p>The said differential limitation means comprises a first plurality of plates (61) fixed on one of the driven transmission shafts (27; 31), a clutch member (53) disposed on the other of the driven transmission shafts (27; 31) and having a second plurality of plates (57) which mates with said first plurality of plates through a predetermined clearance therebetween, a viscous fluid (71) liquid-tightly filled around said first and second plurality of plates, and a cam mechanism (59) which functions due to a viscous resistance of the viscous fluid to force said clutch member towards a direction in which said first and second plurality of plates are fastened together atthe time of a relative rotation between said pair of driven transmission shafts.</p> |
