Continuously variable hydrostatic transmission

Details Continuously variable hydrostatic transmission Continuously variable hydrostatic transmission

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 39/10 (2006.01)

Patent

CA 2178480

A continuously variable hydrostatic transmission (10) includes an input shaft (14) connected to drive a hydraulic pump unit (18), a grounded hydraulic motor unit (20), and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft (16) in driving connection to receive output torque resulting from the exchange of pressurized hydraulic fluid between the pump (18) and motor (20) units through specially configured ports in the swashplate (22). A hydraulically actuated ratio (24) controller is pivotally linked to the swashplate (22) to selectively adjust the swashplate angle relative to the output shaft axis (25) and thereby change transmission ratio.

Une transmission hydrostatique à variation continue (10) comprend un arbre d'entrée (14) destiné à entraîner une pompe hydraulique (18), un moteur hydraulique disposé dans un carter et un arbre de sortie. Un plateau oscillant cunéiforme est monté pivotant sur l'arbre de sortie (16) en étant entraîné afin de recevoir un couple de sortie résultant de l'échange de fluide hydraulique sous pression entre la pompe (18) et des moteurs (20), grâce à des orifices à configuration spéciale ménagés dans ce plateau oscillant (22). Un dispositif hydraulique de commande de rapports (24) est relié de façon à pivoter sur le plateau oscillant (22) pour régler sélectivement l'angle de ce dernier par rapport à l'axe (25) de l'arbre de sortie et modifier ainsi le rapport de transmission.

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