1. A coupling device (1) of the agricultural machine (20), in particular mower, comprising a hitch bracket (2) adapted to be mounted on the tractor three point hitch (3), and at least one beam (4) pivotally connected to the coupling bracket (2) and projecting from it in a direction parallel to the direction of movement (a) of the tractor (3), wherein on the beam (4) is pivotally mounted chassis (6) configured to mount on it the working implements (8), wherein that the connecting device (1) further comprises erhnyuyu rod (17), a bottom rod (18) and central rod (19), wherein the upper link (17) and lower link (18) pivotally connected, each, with a coupling arm (2) and with a central rod (19), forming a projection on a vertical plane parallel to the direction of movement (a), deformable quadrilateral, the central rod (19) pivotally connected to the chassis (6) .2. A coupling device (1) according to claim. 2, characterized in that the beam (4) and at least one of the rods, the upper (17) or lower (18) protruding from the coupling bracket (2) in a direction parallel to the direction of travel (A) .3. A coupling device (1) according to Claim. 1, characterized in that the beam (4) and / or at least one of the rods, the upper (17) or lower (18) protruding from the coupling bracket (2) in the direction of movement (A ).4. A coupling device (1) according to Claim. 1, characterized in that the beam (4) is connected to the chassis (6) through the front joint (7) and with a coupling arm (2) through the rear joint (5), the front hinge (7 ) is located relative to the ground at a greater distance than the rear joint (5), irrespective of the position the chassis (6) relative to the coupling bracket (2) .5. A coupling device (1) according to Claim. 1, characterized in that the work tool (8) comprises a front part (16),1. Соединительное устройство (1) сельскохозяйственной машины (20), в частности косилки, содержащее сцепной кронштейн (2), выполненный с возможностью установки на трехто
