Patent ID: 7662057

Claim:
Eccentric tensioning device for a power-transmission means drive, comprising: a free roller device, which comprises a running disk and a roller bearing provided for supporting the disk, a working eccentric for supporting the free roller device, such that the free roller device can be displaced in a radial direction relative to a rotation axis of the roller bearing according to a magnitude of a pivoting of the working eccentric, a bearing journal device for supporting the working eccentric, a torsion spring for pretensioning the working eccentric, a fixing device for securing the working eccentric in an assembled position, in which the torsion spring is in a pretensioned state, and the working eccentric is fixed in an axial direction relative to the bearing journal, and an adjustment eccentric for supporting the bearing journal device, wherein the adjustment eccentric has a rim radially encompassing the bearing journal device on an end facing away from a flange side, and a passage recess constructed in a region of the rim, through which an end region of the bearing journal device is accessible for applying a force for displacing the bearing journal device relative to the working eccentric in the axial direction.