| 摘要 |
<p>The invention relates to a coupling device for a trailer having steerable wheels. The coupling device includes a coupling plate (2) which is rotatable about the central axis of a coupling pin (18), which coupling plate (2) is supported by a frame (1) to be fixed to the trailer and which includes a driver element intended for cooperation with a part of a tractive unit by means of which the trailer can be moved. The coupling plate (2) rotates along with the tractive unit upon rotation of the tractive unit and the trailer relative to each other about the central axis of the coupling pin (18). The coupling plate (2) is furthermore provided near its circumference with a groove (13) that extends concentrically about the central axis of the coupling pin (18), which groove (13) is surrounded by a groove (7) formed in the frame (1), which extends concentrically about the central axis of the coupling pin (18), in such a manner that said grooves (7,13) form a circumferential chamber, which accommodates the balls (17) that connect the coupling plate (2) and the frame (1). <IMAGE></p> |
