Design of an Agricultural Cutter Using the Theory of a Four-Bar Mechanism

Cutting green or dry crops requires the use of cutter bars or cutter bars, minimizing fruit loss as much as possible and also adapts with the geometry, in particular the terrain of the potatoes during the weeding phase. Currently, two types of cutter bars are fitted to mowers, combine harvesters, hedge trimmers, etc. Among these two types, single blade cutter bars are the oldest and most common while the more recent double-blade cutter bars remain the most efficient despite all the technological complications which more or less affect their commissioning. Thus during the operation of these machines a very agitated kinetodynamic behavior (presence of fluctuation, shock and vibration), was found compromising the conduct of the cutting operation, the premature wear of the moving parts, the efficiency of the machine and even its survival. The choice of the theme of this work was dictated by general considerations on the project to improve the cutting operation, essentially aimed at reducing the risk of jamming, calming the noisy operation of the unit, eliminating the vibrations which the system is the seat and thus improve the performance of the machine through the design and introduction of a new architecture of the mechanism controlling the movable cutting members.