F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 9/18 (2006.01) F16H 55/56 (2006.01)
Patent
CA 2194522
A variable ratio drive pulley of the type employed in snowmobiles to transmit a drive from the snowmobile engine to a variable ratio belt drive transmission has a fixed flange and an opposed movable flange which cooperate to drive the belt. The drive pulley is coupled to rotate with the engine crankshaft and the movable flange incorporates a centrifugal means that operates to advance it towards the fixed flange, with a force that increases with speed of rotation, to grip the transmission belt between the flanges and apply a driving torque thereto, this torque being applied by both the flanges. To reduce the effects of engine induced vibrations on the centrifugal means and on the movable flange, a damping structure is incorporated in the torque path between the engine crankshaft and the centrifugal means and movable flange. The damping structure comprises a hexagonal rubber ring that is positioned between a driving head and the hub of the drive pulley to absorb vibrations which would otherwise be transmitted between these.
Cette invention concerne une poulie d'entraînement à variation continue du rapport de démultiplication du type équipant les motoneiges et qui comporte un flasque fixe et un flasque opposé mobile. La poulie d'entraînement est couplée au vilebrequin du moteur et son flasque mobile comporte un mécanisme centrifuge qui le fait avancer vers le flasque fixe avec une force qui augmente avec la vitesse de rotation et qui serre la courroie de transmission de manière à y transmettre le couple moteur. Pour réduire les effets des vibrations du moteur sur le mécanisme centrifuge, un amortisseur est intercalé entre le vilebrequin et le flasque mobile de la poulie d'entraînement. Cet amortisseur comprend une bague hexagonale en caoutchouc placée entre le moyeu et le disque qui composent le flasque mobile de la poulie d'entraînement.
Bombardier Inc.
Smart & Biggar
LandOfFree
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