Compound chain drive guide

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

Patent

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Details

F16H 7/08 (2006.01)

Patent

CA 2575844

A tensioner assembly for a drive system, including a chain, of an internal combustion engine, includes a housing that is fixedly secured to the internal combustion engine. A piston is disposed within the housing. The piston is moveable between retracted and extended positions. The piston generates a force. A pivoting guide operatively extends between the chain of the drive system and the piston. The pivoting guide applies a first portion of the force against the chain. A lever is operatively connected to the piston between the piston and the pivoting guide. The lever translates the force from the piston to the pivoting guide. The tensioner assembly also includes a cam member that is pivotally coupled to the housing and is slidingly engaged with the pivoting guide. The cam member abuts the lever such that movement of the lever by the piston pivots the cam member in a manner that applies a second portion of the force against the pivoting guide in a varying magnitude.

La présente invention a trait à un ensemble de mise sous tension pour un système de commande, comportant une chaîne, un moteur à combustion interne, comprenant un boîtier qui est solidarisé de manière inamovible au moteur à combustion interne. Un piston est disposé au sein du boîtier. Le piston est mobile entre des positions escamotée et déployée. Le piston génère une force. Un guide pivotant s'étend en fonctionnement entre la chaîne du système de commande et le piston. Le guide pivotant applique une première portion de la force contre la chaîne. Un levier est relié en fonctionnement au piston entre le piston et le guide pivotant. Le levier transfère de la force du piston au guide pivotant. L'ensemble de mise sous tension comporte également un organe de came qui est relié en pivotement au boîtier et est en engagement coulissant avec le guide pivotant. L'organe de came est adjacent au levier de sorte que le déplacement du levier par le piston entraîne le pivotement de l'organe de came de manière à entraîner l'application d'une deuxième portion de la force contre le guide pivotant avec une ampleur variante.

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