Tensioner assembly with electronically controlled vibration...

Details Tensioner assembly with electronically controlled vibration... Tensioner assembly with electronically controlled vibration...

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 7/10 (2006.01) F02N 15/02 (2006.01)

Patent

CA 2593116

A tensioner for use in a belt or chain drive system includes a base and a tensioner arm pivotally mounted to the base and movable between a load stop position and a free stop position. A spring biases the tensioner arm to move towards the free arm stop position. A clutch spring is associated with the base and tensioner arm. An electronic actuator, preferably an actuator comprising a shape memory alloy, is associated with the clutch spring for engaging and disengaging the clutch spring in relation to the base, whereby a stop position of the tensioner arm can be selectively fixed upon selective activation of the electronic actuator.

Un tendeur destiné à être utilisé dans un système d~entraînement par courroie ou chaîne comporte un socle et un bras de tendeur monté pivotant sur le socle et mobile entre une position d~arrêt de chargement et une position d~arrêt libre. Un ressort pousse le bras de tendeur vers la position d~arrêt libre du bras. Un ressort d~embrayage est associé à la base et au bras de tendeur. Un actionneur électrique, de préférence un actionneur comprenant un alliage à mémoire de forme, est associé au ressort d~embrayage pour engager et dégager le ressort d~embrayage par rapport au socle, ce qui permet de fixer de façon sélective une position d~arrêt du bras de tendeur lors de l~activation sélective de l~actionneur électronique.

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