Articulated assembly of two links, and associated removal chain

An articulated assembly of two links for an excavation chain of a ballast excavation device comprising:

• a first of the two links comprising:
• a single-piece body having two flanges which are in parallel with one another and with a reference plane of the articulated assembly, and through each of which a through-hole passes which is aligned with a geometric articulation axis of the articulated assembly, perpendicular to the reference plane, and the second of the two links comprising:
• a single-piece body comprising a guide flange that is inserted between the two parallel flanges of the first of the two links, a guide hole passing through the guide flange, which guide hole is aligned with the geometric articulation axis, the articulated assembly further comprising a hinge pin that is inserted into the guide hole and the through-hole in each of the two parallel flanges wherein the guide hole of the articulated assembly is reinforced by a bushing designed to receive the hinge pin and to guide the hinge pin so as to rotate relative to the single-piece body of the second link;
• and
• the through-hole of one or the other of the two parallel flanges, referred to as the flange for preventing the rotation of the hinge pin, comprises a flat portion cooperating with a flat region of the hinge pin so as to prevent the hinge pin from rotating relative to the single-piece body of the first link.