Rotary belt tensioner with hydraulic damping

Details Rotary belt tensioner with hydraulic damping Rotary belt tensioner with hydraulic damping

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 7/12 (2006.01) F16F 9/14 (2006.01) F16F 9/52 (2006.01) F16H 7/08 (2006.01)

Patent

CA 2308567

A belt tensioner for use in an engine comprises a fixed structure attached to the engine and a moveable structure biased in a belt tensioning direction. One of the fixed and movable structures defines a fluid chamber containing an incompressible fluid, while the other of the two structures defines a chamber dividing structure within said fluid chamber. The fluid dividing structure defines two chamber portions and is constructed such that relative movement of the moveable structure displaces fluid from one chamber portion to the other. The chamber dividing structure is also configured so as to allow the fluid to flow between chamber portions in a restricted manner so as to yieldingly resist the relative movement of the moveable structure, whereby the fluid flow restriction is greater when the moveable structure moves in the opposite direction than when the moveable structure moves in the belt tensioning direction.

Ce tendeur de courroie pour moteur possède une structure fixe assujettie au moteur et une structure mobile sollicitée dans le sens de la tension de la courroie. L'une de ces deux structures définit une enceinte à fluide renfermant un fluide incompressible et l'autre une structure de partition d'enceinte dans l'enceinte à fluide. Cette structure de partition, qui délimite deux éléments d'enceinte, est conçue de manière qu'un mouvement relatif de la structure mobile fasse passer le fluide d'un élément d'enceinte à l'autre. Cette structure de partition est également configurée de façon à ne laisser s'écouler le fluide entre les éléments d'enceinte que de manière restreinte et ce, afin de résister de façon élastique au mouvement relatif de la structure mobile, les restrictions imposées à l'écoulement fluidique étant, de ce fait, plus importantes lorsque la structure mobile se déplace dans la direction opposée au sens de la tension de la courroie.

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