Transmission device specially for a vehicle and control...

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

Patent

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Details

F16H 61/02 (2006.01) F16D 43/09 (2006.01) F16D 43/12 (2006.01) F16H 3/72 (2006.01)

Patent

CA 2156163

The transmission device (1b) comprises an epicycloidal train (7) with a crown connected to the input (2ab) and a planetary wheel (9) prevented from turning in a reverse direction by an idler wheel (16). A satellite carrier (13) is connected to the output shaft (2bc). A crown (8) and the satellite carrier (13) may be coupled by means of a clutch (18b) actuated for engagement by means of fly-weights (29) and a spring (34) to achieve a direct drive. If the engagement is sufficient for the torque to be transmitted, the planetary wheel (9) has its speed reduced and is finally immobilized by means of the idler wheel (16). The device operates then as a reduction unit, and an axial thrust (Pac) due to helical teeth occurs and disengages the clutch. It is also possible to operate the device as a reduction unit by means of a piston (44) which pushes the race (20) in the direction of disengagement of the clutch (18b) and applies a brake (43) which prevents any rotation of the planetary wheel (9), even in the direction normally permitted by the idler wheel (16). Utilization for the selective operation of the transmission device as a reduction unit when the vehicle engine operates in a retaining mode.

Le dispositif de transmission (lb) comprend un train épicycloïdal (7) avec une couronne (8) reliée à l'entré (2ab) et une roue planétaire (9) empêchée de tourner en inverse par une roue libre (16). Un porte-satellites (13) est relié à l'arbre de sortie (2bc). La couronne (8) et le porte-satellites (13) peuvent être accouplés par un embrayage (18b) actionné au serrage par des masselottes (29) et un ressort (34) pour réaliser une prise directe. Si le serrage est suffisant pour le couple à transmettre,la roue planétaire (9) ralentit puis est immobilisée par la roue libre (16). Le dispositif fonctionne alors en réducteur, tandis qu'une poussée axiale (Pac) due aux dentures hélicoïdales apparaît et desserre l'embrayage. On peut encore faire fonctionner le dispositif en réducteur au moyen d'un piston (44) qui pousse la cage (20) dans le sens desserrage de l'embrayage (18b) et serre un frein (43) qui interdit toute rotation de la roue planétaire (9) même dans le sens normalement permis par la roue libre (16). Utilisation pour permettre sélectivement le fonctionnement en réducteur lorsque le moteur du véhicule fonctionne en retenue.

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