Railway bogie with articulated side frames

A rail vehicle guide and support arrangement including a bogie having independent wheels and comprising:

• a crossbeam (3) fastened to a vehicle body (2) so as to be perpendicular to a vertical plane containing the longitudinal axis (X X') of the vehicle, in proximity to one end of said body (2),
• two longitudinal members (4) each having at least first and second wheels (6,9), and
• first articulation means for articulating said longitudinal members;
• wherein said longitudinal members, in the longitudinal direction, are mounted on said first articulation means (12) carried by said crossbeam (3) on each side of said vertical plane, so as to enable said at least first and second wheels (6,9) carried by the longitudinal members (4) to follow curves and to pass over uneven parts of a track;
• and
• wherein said longitudinal members (4) have a second articulation means;
• each of said longitudinal members comprising a longitudinal frame member (5) articulated to the crossbeam (3) about said first articulation means and extended by a directional arm (7) which is articulated about said second articulation means, comprising a substantially vertical pivot (8), to the longitudinal frame member (5) and which has at its free end said second wheel (9);
• wherein each longitudinal member (4) has a first extension (15) extending inwardly into the bogie in a transverse direction substantially perpendicular to that of said arm (7) and provided with third articulation means having a brace (17) fixed thereto;
• and
• wherein said brace (17) is connected by rods (19) to a second extension (18) of each directional arm (7), and forms with said crossbeam (3) and said frame members (5) a deformable quadrilateral ensuring correct orientation of said wheels (6) relative to a rail (10).

A rail vehicle guide and support arrangement including a bogie having independent wheels and comprising:

• a crossbeam (3) fastened to a vehicle body (2) so as to be perpendicular to a vertical plane containing the longitudinal axis (X X') of the vehicle, in proximity to one end of said body (2).
• two longitudinal members (4) each having at least first and second wheels (6,9), and
• first articulation means for articulating said longitudinal members;
• wherein said longitudinal members, in the longitudinal direction, are mounted on said first articulation means (12) carried by said crossbeam (3) on each side of said vertical plane, so as to enable said at least first and second wheels (6,9) carried by the longitudinal members (4) to follow curves and to pass over uneven parts of a track;
• and
• wherein said longitudinal members (4) have a second articulation means;
• each of said longitudinal members comprising a longitudinal frame member (5) articulated to the crossbeam (3) about said first articulation means and extended by a directional arm (7) which is articulated about said second articulation means, comprising a substantially vertical pivot (8), to the longitudinal frame member (5) and which has at its free end said second wheel (9);
• wherein each longitudinal member (4) has a first extension (15) extending inwardly into the bogie in a transverse direction substantially perpendicular to that of said arm (7) and provided with third articulation means having a brace (17) fixed thereto;
• and
• wherein each directional arm (7) carries nears its free end a second extension (18) extending inwardly into the bogie in a transverse direction and having a rod (19) fastened thereto and fixed to said brace (17).