Abstract: A rotovibrating device applicable to the knocking down rod headers of harvesting machines, rendering a much better yield to that of other harvesting machines that use the rotovibrating devices known today, being harvesting machines comprising: a frame holding the rotating headers or rollers (2), each one having a vertical axle with which a plurality of rods (3) are radially in contact; said rods being capable of being in physical contact with the branches of the plant to be harvested; comprising at least three eccentric weights (9) capable of turning on independent axles (8), and being laid on equidistant vertexes (7) of the unit that supports the weights (6); and said eccentric weights (9) are in connection with respective crowns (Ci), which receive the movement from their pertinent pinions (Pi) located on the axle (11) of the turning header or roller and the weight (9) support unit (6); having a brake system that is capable of braking the support unit (6) and the header (2) and thus attaining the rotation o