| 摘要 |
A pretensioning tool is provided for an eccentric tensioning device, which is used for tensioning a power-transmission means constructed, for example, as a flat or toothed belt in a power-transmission means drive. Advantages are provided for installation of special power-transmission means tensioning devices that can be secured in a mounting state achieved under pretensioning of the torsion spring. The tensioning tool is for an eccentric tensioning device of a power-transmission means drive, which includes a working eccentric loaded by a torsion spring, a bearing journal supporting the working eccentric, and a running disk device encompassing the working eccentric, has an engagement structure that can be coupled locked in rotation with the working eccentric from a front region facing away from the flange side of the eccentric tensioning device and a decoupling structure for implementing an axial displacement of the working eccentric relative to the bearing journal. In this way, for an eccentric tensioning device of the type named above, it is possible in an advantageous way to turn back the working eccentric by hand and with moderate hand forces against the tensioning moment applied by the torsion spring of the tensioning device into a mounting position and to secure the working eccentric in this mounting position through axial decoupling of this eccentric relative to a base plate device.
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