Patent ID: 6857977

Claim:
Tensioner ( 1 ) for a traction drive, with a rotationally fixed housing ( 2 ) having one end formed with a recess for arrangement of a bearing receptacle ( 6 ), for receiving and guiding an axle ( 9 ) which is connected to a swivel arm ( 10 ) arranged on the side of the housing ( 2 ), wherein a rotatable tension roller is arranged on the free end of the swivel arm ( 10 ) and disposed upon the traction drive, and a torsion spring ( 7 ) in concentric surrounding relationship to the bearing receptacle ( 6 ) between the housing ( 2 ) and the swivel and ( 10 ) for loading the swivel arm ( 10 ) in the direction of an end position and thereby simultaneously axially spreading apart these components, wherein a friction disk ( 11 ) is connected to the swivel arm ( 10 ) and is urged in forced engagement with the housing ( 2 ) for realizing a dampened adjusting movement characterized in that at east one elastic insert ( 17 a to 17 e ) of PU-foam fills over an axial partial length of the torsion spring ( 7 ) a circular ring shaped space ( 16 , 19 ) which is defined by a radially inwardly disposed portion of the bearing receptacle and the surrounding torsion spring ( 7 ), wherein the insert has one portion to bear against the radially inwardly disposed portion of the bearing receptacle and another portion to bear against the surrounding torsion spring to thereby bridge the circular ring shared space in radial direction.