Continuously variable hydrostatic transmission

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

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F16H 39/14 (2006.01) F16H 39/10 (2006.01)

Patent

CA 2189846

A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connection to receive output torque resulting from the exchange of pressurized hydraulic fluid between the pump and motor units through ports in the swashplate. A hydraulically actuated ratio controller is pivotally linked to the swashplate to selectively adjust the swashplate angle relative to the output shaft axis and thereby change transmission ratio.

Transmission hydrostatique variable en continu, comportant un arbre d'entrée monté de façon à entraîner une pompe hydraulique, un moteur hydraulique mis à la masse, et un arbre de sortie. Un plateau oscillant taillé en biseau est monté de façon pivotante sur l'arbre de sortie de façon à recevoir le couple de sortie résultant de l'échange de fluide hydraulique sous pression entre la pompe et le moteur par des orifices du plateau oscillant. Un système d'ajustement de rapport, actionné hydrauliquement, est monté de façon pivotante sur la plaque pour régler sélectivement l'angle du plateau oscillant par rapport à l'axe de l'arbre de sortie, et modifier ainsi le rapport de transmission.

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