Abstract: 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.

Abstract: A tensioner (1, 1?) for a traction mechanism such as a belt, chain or the like, with a tensioning lever (4) which can be acted on by a helical spring (2), can pivot about a stationary shaft and on which a tensioning element is provided for abutment against the traction mechanism to be tensioned. The helical spring (2) is held at its ends by spring receptacles (6, 7) and a means (8, 9, 71) is provided for delimiting the spring excursion.

Abstract: 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.

Abstract: 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.

Abstract: An eccentric tensioning device for tensioning the traction means of a traction means drive is provided. The invention provides solutions, through which advantages are given in the installation of tensioning devices under assembly-specific aspects. The eccentric tensioning device for a traction means drive includes a track roller device, which has a running disk and a rolling bearing provided for supporting this disk, a work eccentric for supporting the track roller device such that it can be displaced in a radial direction relative to the rotating axis of the rolling bearing through pivoting of the work eccentric, a torsion spring for pretensioning the work eccentric, and a fixing device for securing the work eccentric in a mounting position, in which the torsion spring is located in pretensioned state.

Abstract: A tensioning device constructed, in particular, as a double eccentric tensioning device for a traction means drive is provided, which guarantees in the installed state a sufficient pretensioning of a traction means of the traction means drive. The invention provides advantages in the installation of the eccentric tensioning devices under assembly-specific aspects. This is provided by an eccentric tensioning device for a traction means drive, with a track roller device, which includes a running disk and a rolling bearing provided for supporting the disk. An operating eccentric for supporting the track roller device such that it can be displaced in a radial direction relative to the rotating axis of the rolling bearing according to a magnitude of the pivoting of the operating eccentric, and a torsion spring for pretensioning the operating eccentric in a pivoting direction are provided. The operating eccentric forces the track roller device carried by the eccentric against an allocated traction means.