Expandable pulley

Details Expandable pulley Expandable pulley

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 55/54 (2006.01)

Patent

CA 2496035

An expandable pulley (100). The expandable pulley (100) comprises a plurality of belt blocks (10) arranged about an axis of rotation (A). Each belt block (10) bears upon a radial surface extending normally to the axis of rotation. Another surface of each belt block (10) bears upon a conical member (16) surface which is moveable coaxially with the axis of rotation. A spring (22) bears upon the conical member (16) which urges the conical member (16) in an axial direction, which in turn urges the belt blocks (10) radially outward to compensate for a belt length change and to maintain a belt tension. An elastic member (24) holds the belt blocks (10) in contact with the conical member (16).

L'invention concerne une poulie extensible (100). Ladite poulie extensible (100) comprend une pluralité de blocs de ceinture (10) disposés autour d'un axe de rotation (A). Chaque bloc de ceinture (10) repose sur une surface radiale s'étendant perpendiculairement à l'axe de rotation. Une autre surface de chaque bloc de ceinture (10) repose sur une surface d'un élément conique (16) qui se déplace coaxialement par rapport à l'axe de rotation. Un ressort (22) repose sur ledit élément conique (16) qui presse l'élément conique (16) dans une direction axiale, ce qui pousse alors les blocs de ceinture (10) radialement vers l'extérieur pour compenser un changement de longueur de la ceinture et pour maintenir une certaine tension de la ceinture. Un élément élastique (24) permet de maintenir les éléments de ceinture (10) en contact avec l'élément conique (16).

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