| 摘要 |
<p>The present invention relates to an automatic locking and release mechanism, particularly for moving the latch for the automatic locking and controlled release of the ball pivots of tools supported and towed by agricultural machines, for lower hooks (1) of three-point hitches. Each of the hooks comprises a box-like body (2) defining a crook directed outward with its recess (3) directed upward. A latch (6) protrudes from an opening (5), defined in the body (2) entering the recess (3). The latch (6) is moveable in a hollow seat (7), defined in the body (2), its opening movement being contrasted by elastic means (18). At a protrusion (9) extending centripetally from the wall opposite to the opening (5) of the hollow seat (7) is articulated the small end of a connecting rod (11). The big end of the connecting rod (11) is connected by means of an articulation (12) to the end (6b) of the latch (6). A shaped end (13a) of an articulation rod (13) for opening the latch (6) is also articulated to the articulation (12). Elements (16) for locking the rod (13) in the open position of the latch (6) are further provided. <IMAGE></p> |
