Power transmission device

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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Details

F16D 35/02 (2006.01) F16D 31/02 (2006.01) F16D 31/08 (2006.01) F16D 35/00 (2006.01)

Patent

CA 2211035

A power transmission device capable of transmitting power so that the power is gradually increased in accordance with a rotational speed difference, and a differential gear using the same. When a rotational speed difference occurs between a case (1) and a ball disc (3), the balls (4) move back and forth in the grooves (1b) in the case (1) as they roll along a groove (3b) in the ball disc (3). When the difference between the rotational speeds of the case (1) and ball disc (3) becomes large during this time, the resistance occurring while the balls (4) roll against a viscous fluid (6) increases, and power is transmitted between the case (1) and ball disc (3). During this time, the resistance of the viscous fluid (6) increases in accordance with the moving speed of the balls (4), so that the power being transmitted becomes gradually large in accordance with the rotational speed difference.

Dispositif capable de transmettre une puissance, de façon à augmenter graduellement cette puissance en fonction d'une différence de vitesse de rotation et d'un engrenage différentiel utilisant cette dernière. Quand une différence de vitesse de rotation apparaît entre une case (1) et un disque à billes (3), les billes (4) effectuent un mouvement de va-et-vient dans les rainures (1b) de la case (1) simultanément à leur roulement le long d'une rainure (3b) du disque à billes (3). Quand la différence entre les vitesses de rotation de la case (1) et du disque à billes (3) devient importante pendant cette période, la résistance apparaissant tandis que les billes (4) roulent contre un liquide visqueux, augmente et la puissance se transmet entre la case (1) et le disque à billes (3). Pendant cette période, la résistance du liquide visqueux (6) augmente en fonction de la vitesse de déplacement des billes (4), de sorte que la puissance transmise augmente progressivement en importance en fonction de la différence de vitesse de rotation.

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