Hitching system between a tractor and a trailer of the semi-supported type

摘要

The coupling system according to the invention comprises a connecting arm (5) arranged between the front (8) of the trailer and the tractor coupling bar (7) which is fastened and articulated on the lifting arms (9). The connecting arm (5) comprises means of articulation about a rolling axis (13) and means of articulation about two yawing axes (11, 12) which are changeable and are arranged one in the region of the central lower part of the front face (8) of the trailer and the other in the region of the coupling bar (7). The device comprises means for locking one or other yawing axis (11, 12) in order to carry out an alternative selection of said axes. These means can be in the form of a sliding latch (20) associated with operating means of the lever (23) or hydraulic-jack type. This coupling system makes it possible to improve driving under traction or in reverse as a result of the proposed choice for the positioning of the yawing axis. IMAGE