Swivel hitch structure

A hitch structure for connecting agricultural implements or the like to pulling machines, comprising, at least one draw bar member connected to a frame of a pulling machine, said draw bar member extending in a longitudinal direction of the pulling machine, a cross-bar member extending transverse to said draw bar member, a swivel connection means between said draw bar and cross-bar members allowing swivelling movement of said cross-bar member with respect to said draw bar member about an upright axis substantially perpendicular to said longitudinal direction, wherein according to the improvement said swivel connection means comprise a slotted hole in one of said draw bar and cross-bar member, said slotted hole having its longitudinal extension parallel to said longitudinal direction, a pin member inserted in said slotted hole and connected to that other one of said draw bar and cross-bar members without said slotted hole, said pin member defining said swivel axis and being shiftable within said slotted hole from a forward end position thereof to a rearward end position thereof together with said one of said draw bar and cross-bar members, abutment means cooperating with said frame of the pulling machine and facing opposite end portions of said cross-bar member, stop means on the opposite end portions of said cross-bar selectively cooperating with said abutment means in one position of said pin member with respect to said slotted hole, said stop and abutment means selectively allowing and preventing limited swivelling motion of said cross-bar about said pin member and lever and link members for connecting said cross-bar member with said agricultural implement.