Assembly comprising a first body and a second body swinging laterally with respect to the first body, and a corresponding railway vehicle

The assembly (1) comprises first and second chassis (8,9) the second relying on the first to laterally pivot, supported by two pivoting brackets (14) spaced laterally from each other. The displacer (10) comprises an arm (28) laterally located from the second chassis, and fixed by a ball and socket joint, which holds the two pivoting brackets when the chassis is in the reposed position.