Dynamic counterweight mechanism for one-sided sprayers

Dynamic counterweight mechanism for one-sided sprayers, wherein said one-sided sprayer is balanced by a counterweight, comprising:

• a fixed frame (3) vertically secured to a chassis (2) of said one-sided sprayer, wherein said mechanism is vertically moveable in said fixed frame;
• p1 a sliding frame (20) laterally suspending a counterweight module (30) on one side of the sliding frame (20), said sliding frame having a plurality of cushions (25);
• a spray boom assembly (4) having an air assistance system (70);
• a swinging module (40) pivotally arranged on a side of the sliding frame (20) opposite to said counterweight module (30) and rotatable about a bearing (24, 43), said swinging module (40) defined by a vertical profile (41) having a supporting base comprising horizontal profiles (42), wherein said swinging module (40) has an upper end, said upper end connected to the counterweight module (30) by a steel cable (33), said steel cable (33) suspending a counterweight block (32), said counterweight block (32) moveable in a vertical direction by displacement of the swinging module (40), wherein said steel cable (33) extends through a set of sheaves (50, 51, 52, 53) arranged between the swinging module (40) and the sliding frame (20);
• said counterweight module (30) comprising an adjustable traction spring (34, 35) having opposite ends, wherein one end of said traction spring (34, 35) is connected to the swinging module (40) and another end of the traction spring (34, 35) is connected to the sliding frame (20, 21), wherein said swinging module (40) has an angular displacement, wherein said angular displacement is deadened by said cushions on said sliding frame (20);
• a moveable quadrangular structure (60) arranged in front of and proximate to the swinging module (40), wherein said quadrangular structure (60) sustains said air assistance system (70), said quadrangular structure (60) suspended by the horizontal profiles (42) of the supporting base of the swinging module (40) and pivotally retained to said vertical profile (41) by means of a vertical shaft (41a) disposed on said profile (41), wherein the quadrangular structure (60) rotates or move angularly about the vertical shaft (41a) according to a transversal plane in relation to the swinging module (40), and wherein an angular displacement of the quadrangular structure (60) is deadened by said cushions (25).