| 摘要 |
An eccentric tensioning device is provided for tensioning a power-transmission means constructed, for example, as a flat belt or toothed belt in a power-transmission means drive. The tensioning device can be brought into a pretensioned mounting state in an advantageous way. The eccentric tensioning device has a free roller device that includes a running disk and a roller bearing provided for supporting this disk, a working eccentric for supporting the free roller device, that can be displaced in the radial direction relative to the rotating axis of the roller bearing according to the magnitude of the 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 a mounting position, in which the torsion spring is located in a pretensioned state, and an adjustment for supporting the bearing journal device. The adjustment eccentric has a rim encompassing the bearing journal device on an end facing away from a flange side and a passage device, through which an end region of the bearing journal device is accessible, is constructed in the region of this rim. In this way, it becomes possible in an advantageous way to create a tensioning device, in which the bearing journal device can be loaded on the end with an axial force used for the axial displacement of the working eccentric relative to the guide journal. It thus becomes possible to bring a tensioning device detached by unlocking the fixing device in an advantageous way into a pretensioned mounting state and in this way to reconfigure it into a mounting-ready state.
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