Travel limited linear belt tensioner

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

Patent

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Details

F16H 7/12 (2006.01) F16H 7/08 (2006.01)

Patent

CA 2465678

The invention is an improved belt tensioner for a belt drive system having a belt tensioner, a first belt tensioner pulley, a crankshaft pulley, an accessory pulley, and a power transmission belt trained about the first belt tensioner, crankshaft, and accessory pulleys. The belt tensioner is of the type that includes an attachment point adapted to be affixed to a stationary point relative to a cylinder block of an engine, a track, and a first carrier mounted in sliding relation with the track with two degrees freedom of movement. The first belt tensioner pulley is rotatably mounted upon the first carrier for engaging the power transmission belt. A resilient member biases the first carrier in longitudinal relation to the track. The improvement comprises the tensioner including a travel limiting mechanism.

L'invention concerne un tendeur de courroie amélioré destiné à un système de commande de courroie comprenant un tendeur de courroie, une première poulie de tendeur de courroie, une poulie de vilebrequin, une poulie auxiliaire et une courroie de transmission de puissance entraînée autour du premier tendeur de courroie, du vilebrequin et des poulies auxiliaires. Le tendeur de courroie selon l'invention est d'un type comprenant un point de fixation conçu pour être appliqué sur un point fixe par rapport au bloc-cylindres d'un moteur, à un rail et à un premier transporteur monté coulissant sur le rail et présentant deux degrés de mouvement différents. La première poulie de tendeur de courroie est montée rotative sur le premier transporteur, de sorte à venir en contact avec la courroie de transmission de puissance. Un élément élastique sollicite le premier transporteur longitudinalement par rapport au rail. L'amélioration apportée au tendeur de courroie selon l'invention réside dans le fait qu'il comprend un mécanisme de limitation de course.

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