Frictional damping strut

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

Patent

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Details

F16F 7/08 (2006.01) F16F 15/129 (2006.01) F16H 7/08 (2006.01) F16H 7/12 (2006.01)

Patent

CA 2460220

The invention comprises a frictional damping strut. The strut comprises an inner cylinder (208) that slides within an outer casing (201). A spring biases (202) the inner cylinder away from the outer casing in an axial direction. A first wedge member (209) cooperatively engages a second wedge member (204). The first wedge member having a frictional engagement with the inner cylinder such that when the inner cylinder is pressed into the outer casing the first wedge member bears upon the second wedge member causing the first wedge member to radially expand, thereby increasing a frictional force between the first wedge member and the inner cylinder. A second spring (207) preloads the first wedge member against the second wedge member. A belt tensioner may incorporate the damping strut to preload a belt and damp belt oscillations.

L'invention concerne un amortisseur à friction. Cet amortisseur comprend un cylindre intérieur (208) coulissant à l'intérieur d'un boîtier extérieur (201). Un ressort sollicite (202) le cylindre intérieur dans un sens axial opposé au boîtier extérieur. Un premier élément de cale (209) entre en prise de manière solidaire avec un second élément de cale (204). Ce premier élément de cale entre en prise par friction avec le cylindre intérieur de façon que lorsque le cylindre intérieur est poussé dans le boîtier extérieur, le premier élément de cale appuie sur le second élément de cale, ce qui amène le premier élément de cale à s'étendre radialement, d'où une force de friction accrue entre le premier élément de cale et le cylindre intérieur. Un second ressort (207) soumet le premier élément de cale à une précharge contre le second élément de cale. Un tendeur de courroie peut utiliser cet amortisseur pour soumettre une courroie à une précharge et amortir les oscillations de cette courroie.

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