TRUCK-TRACTOR COUPLER Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: invention is designed for connecting truck-tractor and trailing member. Hitch clevis is hinge-coupled by cylindrical journals with rear hinge joints of draft links front ends of draft links are connected with frame of truck-tractor. Member enclosing hitch clevis is rigidly connected with drawbar of trailing member and it engages by its surfaces with stops of clevis made in form of through cutoff formed in clevis by relatively intersecting vertical plane square to longitudinal axis of symmetry of clevis and cylindrical surfaces symmetrical relative to longitudinal axis of clevis with axes passing through points of intersection with vertical plane and radii of radial sections equal to length of vertical plane. Invention provides improved stability of movement of truck-tractor and trailing member owing to elimination of clearances in horizontal plane between enclosing member and hitch clevis appearing at running-on of trailing member and leading to yawing of trailing member. EFFECT: improved stability of trailer-train in motion. 3 cl, 8 dwg