Compact tensioner with sustainable damping

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

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Details

F16H 7/12 (2006.01)

Patent

CA 2738697

A tensioner assembly that includes a base, an arm, an opening spring (i.e., a torsion spring that opens or radially expands with increasing torque applied thereto), a spring reaction member, and a pivot bushing. The tensioner assembly is configured to orient various loads in predetermined directions. For example, a spring load can be oriented to counteract a hub load to reduce a bushing load that acts on the pivot bushing. As another example, a spring reaction force exerted by the spring reaction member can be employed by a damping mechanism to generate a grounding force that is parallel to the spring reaction force and is directed to intersect an axis about which the arm pivots relative to the base. A tensioner assembly having improved assembly characteristics is also provided.

Cette invention concerne un ensemble tendeur comprenant une base, un bras, un ressort hélicoïdal (cest-à-dire un ressort de torsion qui souvre ou sétend radialement à mesure que le couple appliqué sur celui-ci augmente), un élément de réaction élastique, et une douille de pivotement. Lensemble tendeur est configuré pour orienter diverses charges dans des directions prédéterminées. Par exemple, une charge du ressort peut être orientée de sorte à contrecarrer une contrainte centrifuge afin de réduire une charge de la douille qui agit sur la douille de pivotement. Dans un autre exemple, une force de réaction exercée par lélément de réaction élastique peut être utilisée par un mécanisme damortissement pour générer une force de retenue parallèle à la force de réaction élastique et elle est orientée de sorte à croiser un axe autour duquel le bras pivote par rapport à la base. Cette invention concerne de plus un ensemble tendeur présentant des caractéristiques dassemblage améliorées.

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