A rail vehicle having at least a first carriage and a second carriage intercoupled via a carriage coupling device that has a variable resistance to twisting of the at least first carriage relative to the second carriage, wherein a first resistance torque gradient of the carriage coupling device at a first angular position of the at least first carriage relative to the second carriage in a direction of rotation is greater in magnitude than a second resistance torque gradient of the carriage coupling device at a second angular position of the at least first carriage relative to the second carriage in the same direction of rotation, where the first angular position is associated with a lesser twisting of the at least first carriage relative to the second carriage than the second angular position, such that an improved driving behavior of the rail vehicle is achieved, particular when entering track curves.

An urban rail transit vehicle includes a vehicle body, a plurality of driving rubber wheels and guiding steel wheels are installed on the bottom of the vehicle body; the plurality of driving rubber wheels are arranged along the length of the vehicle body, the plurality of guiding steel wheels are arranged along the length of the vehicle body; the vehicle body is provided with a first driving device for driving the guiding steel wheels to move up and down along the height of the vehicle body. In the urban rail transit vehicle provided by the present invention, guiding steel wheels capable of moving up and down are arranged on the vehicle body, realizing running on a railway line or an automobile transport road surface line, diversifying applications of vehicle and reducing construction cost.

The manufacturing method includes a step for manufacturing a structural frame, defining an area intended to house driving equipment, said structural frame including two side walls on either side each having at least one side opening, a step for assembling two side windows, each covering a respective one of the side openings, and, prior to said assembly step, a step for producing two side window supports, each assembled with a respective one of the side walls, each side window being attached on a respective one of the side supports during the assembly step.

A chassis (100), in particular a low-floor chassis, for a rail vehicle, in particular for a tram-way. The chassis (100) comprises at least four wheels (4) each having a wheel bearing, at least two wheel axles for suspending the wheels (4), a chassis frame (1) and a primary suspension for suspending the wheels (4) relative to the chassis frame (1). The primary suspension has at least four torsion bars (20). Two torsion bars (20) each, in particular two torsion bars on one side of the chassis, are connected via a connecting element (21) in such a way that the torque of the torsion bars (20) oppose each other, in particular the torques essentially cancel each other out.