| 摘要 |
1. A towable vehicle (R ; R1) comprising an extensible hitching device (1) connectable to the rear of a further vehicle (C ; C1), said hitching device having a hydraulic circuit with a normally closed check valve (8), elongated detection means (10 ; 110) forming a given angle with the vertical line when the longitudinal axes of the tow vehicles are parallel, a linkage (13 ; 113) connecting the detection means (10 ; 110) to the check valve (8) and able to open the latter when the angle formed by the detection means with the vertical line decreases under the action of the further vehicle (C ; C1), and a fluid under pressure to allow the lengthening of the hitching device (1) when the check valve (8) is open, characterized in that the detection means (10 ; 110) comprise at least one horizontal shaft (14 ; 114) connected to the linkage (13 ; 113) and movable axially on the towable vehicle (R ; R1), perpendicularly to the longitudinal axis thereof, and in that tilting means (28, 30 ; 128, 130) are provided to pivot the horizontal shaft (14 ; 114) around its longitudinal axis, so as to tilt the detection means (10 ; 110) back to the towable vehicle (R ; R1) when the horizontal shaft (14 ; 114) is moved axially. |
