| 摘要 |
<p>A device for rapidly adjusting the heights of tow hitches for vehicles to be connected to agricultural tractors comprises a main support assembly including two parallel, vertical guides (105) for a mounting (102) for a tow hitch (1). Two rows of holes (17a, 17b) associated with the guides selectively house two parallel pins (11, 12) which are movable in opposite directions from locking positions to positions in which the mounting (102) is released. An operating lever (25) with a grip (26), for supporting the weight of the mounting (102) in its released position, rotates a butterfly-like element (118) the wings (21) of which are coupled with the parallel pins (11, 12). <IMAGE></p> |
