Device (1) for connecting the folding beam to the frame of articulated vehicles, comprising:a connecting element (2) with a hook section (3), which is coupled or coupled to an end edge (101a) of a folding beam (101), and with an intervention section (4), which can be inserted into a cavity defined by a rigid bracket (300) of the vehicle frame (400) and at least one first inner wall (310) of the cavity; (400) can be installed,-an elastically deformable insertion element (10),which can be inserted into the cavity (400) between the connecting element (2) and a second inner wall (320) of the cavity (400) to keep the intervention section (4) stable against the first inner wall (310); characterised by the fact that the introductory element (10) and the connecting element (2) comprise reciprocal coupling devices (11, 21) designed to establish a reciprocal connection between the introductory element (10) and the connecting element (2).
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