Abstract: The machine comprises a flow control valve with hydraulic fluid conduits; the fluid may be supplied by the vineyard tractor circuit, and conduits are connected to the hydraulic engine control element, to which a second hydraulic engine control is added for the operation of a conveyor belt located inside a frame. Said hydraulic engine is coupled to a connecting rod-crank mechanism mechanically associated to a motor lever intended to drive the guides of the sliding vibrating clamps, and this is achieved by means of a kinematic chain integrated by rods. A pair of friction rings has been intercalated in the motor lever in order to avoid lateral displacement thereof. The connecting rod-crank mechanism comprises the disk shaped crank, which is perforated to regulate the positioning of the trunnion provided by the connecting rod, which operates the motor lever and the guides of the sliding vibrating clamps.