Schaeffler Technologies Ag & Co .kg

Thorsten Liebel

Bernd Hartmann

Scott Thompson

Fred G Seebeck

A clamping device () of a traction mechanism drive, comprising a fixedly positioned base part (), with which a pivot arm () is associated. The pivot arm () can be pivoted via a rotary bearing, consisting of a hub (), a pin () of the base part () and a sliding bearing (). A spring means () inserted between the base part () and the pivot arm () exerts an expansion force and effects a non-positive support of a tensioning roller () that is connected to the pivot arm () on a traction mechanism. In order to damp adjusting movements of the pivot arm (), a damping device () is provided, which comprises two separate spring-loaded friction elements. For this purpose, a friction disk () is supported with form fit on the supporting disk () connected to the pin () of the base part () and with friction fit on the pivot arm (). The damping device () further comprises a friction ring (), which is fixed to the pivot arm () and is supported with friction fit on an inner wall () of the crucible-shaped base part () and which directly cooperates with the spring means ().

Tensioning device

A tensioning device for a traction mechanism drive for a belt drive that is incorporated in an internal combustion engine, in order to drive components of the engine or installed accessories. The tensioning device has a construction that is advantageous under production and construction viewpoints, by a high degree of robustness, and also by an advantageous mechanical operating behavior. The tensioning device includes a base part, a swivel arm, a torsion spring with a first winding end section that is allocated to the swivel arm and a second winding section that is allocated to the base part for applying a pivoting moment acting between the base part and the swivel arm and forcing the swivel arm in a tensioning direction, and a damping device for generating a damping force that counteracts a pivoting of the swivel arm directed against the tensioning direction. This damping device includes a first friction surface element that is arranged in a region of the winding end section of the torsion spring allocated to the swivel arm, and forms a friction surface that is used for applying friction force and that sits on a counter friction surface. In the region of the second winding end of the torsion spring for the base part, there is a second friction surface element that forms a friction surface that sits on a counter friction surface, and the counter friction surface is formed by a friction surface structure that can pivot together with the swivel arm.

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Fürth, Germany

Thorsten Liebel