Abstract: A device for subjecting a shaft to a combined simple rotation and alternating rotation of limited extent about its own axis, the device including two supporting plates which rotate with the shaft coupled to a vibration generator and, between the plates, a part of a gear system which rotates freely with respect to the shaft and is associated with rotation actuation motor. Two first slotted holes are formed in each one of the plates so that they are diametrically opposite with respect to the shaft, the first slotted holes being arranged, upon assembly, at second slotted holes formed in the gear system, elastic compression springs being rigidly coupled between the first and the second slotted holes.

Abstract: A cutting apparatus for a vehicle, particularly for cutting sods and removing plants, comprising a transmission device which is connected by elements a power take-off coupled to a driving device. The cutting apparatus is supported by a supporting structure which is articulated to one or more axes. The cutting apparatus comprises a guiding and supporting element which is supported by the supporting structure and is shaped so that upon assembly it is arranged like a circular arc along its longitudinal extension. A plurality of sliding blocks is slidingly associated with the guiding and supporting element along its edge; the sliding blocks are mutually connected and moved by a flexible element. Each sliding block supports a corresponding cutting element which is suitable to cut and remove plants. The plurality of sliding blocks and the corresponding flexible element form a closed cutting loop which is kinematically coupled to the power take-off.

Abstract: The device has springs arranged diametrically opposite with respect to a shaft that is coupled to a generator of torsional vibrations. The springs are rigidly coupled between first supporting elements that rotate with the shaft and second supporting elements that are rigidly coupled to a gear system that is freely mounted on the shaft. The gear system is coupled to a motor for actuating rotation of the shaft.