| 摘要 |
<p>A base member (11) for attachment to a vehicle to be towed comprising elongate upwardly converging guide walls (20 and 21) of equal length to slidably receive a drawbar (26) therebetween for movement between retracted and advanced positions relative to the base member (11). The drawbar (26) has a socket element (32) at its forward end for coupling with a ball member (33) on a towing vehicle and a sliding pivot pin (28) at its rear end for guiding the drawbar (26) along the length of the guide walls (20 and 21) and permitting swinging of the drawbar (26) laterally to position the socket element (32) in alignment with the ball member (33) without having to maneuver the towed or towing vehicle. The sliding pivot pin (28) snaps into notches (43) in the base member when the drawbar (26) is moved into its retracted position to lock the drawbar in driving relation to the base member (11).</p> |
