A rail vehicle that includes at least one car and at least one bogie that carries the car, the bogie including a chassis and a secondary suspension system between the chassis and the car, wherein the secondary suspension system includes a spring assembly mounted between the chassis and the car, the secondary suspension system including an actuator, provided with a piston extending at least partially between an upper stop secured to the car and a lower stop secured to the chassis, and a supply device of the actuator, and wherein supply device of the actuator is configured to supply the actuator such that the distance between the upper and lower stops is kept constant.

A rail vehicle for a fixed turnout track, including: a vehicle body and bogies. Each bogie is installed at a bottom of the vehicle body; the bogie comprises: a wheelset assembly, a frame, and a track change device; the frame is installed at the wheelset assembly, the track change device is installed at the frame, and the track change device is adapted to cooperate with the branch guide rail of a fixed turnout track to guide the rail vehicle to enter the main rails or the branch rails through the turnout.

A rail vehicle for a fixed turnout track, including: a vehicle body and bogies. Each bogie is installed at a bottom of the vehicle body; the bogie comprises: a wheelset assembly, a frame, and a track change device; the frame is installed at the wheelset assembly, the track change device is installed at the frame, and the track change device is adapted to cooperate with the branch guide rail of a fixed turnout track to guide the rail vehicle to enter the main rails or the branch rails through the turnout.

A transaxle of a rail vehicle includes: a power assembly; an axle body; a running wheel; a guiding frame; a horizontal wheel; and a connecting rod component, including a first transverse pull rod and a second transverse pull rod, where when the rail vehicle turns left, the horizontal wheel cooperates with a rail beam to drive the guiding frame to swing and drive the first transverse pull rod to move together, and the second transverse pull rod is driven by the first transverse pull rod to drive the running wheel to swing to the left, and when the rail vehicle turns right, the horizontal wheel cooperates with the rail beam to drive the guiding frame to swing and drive the first transverse pull rod to move together, and the second transverse pull rod is driven by the first transverse pull rod to drive the running wheel to swing to the right.

A transaxle of a rail vehicle includes: a power assembly; an axle body; a running wheel; a guiding frame; a horizontal wheel; and a connecting rod component, including a first transverse pull rod and a second transverse pull rod, where when the rail vehicle turns left, the horizontal wheel cooperates with a rail beam to drive the guiding frame to swing and drive the first transverse pull rod to move together, and the second transverse pull rod is driven by the first transverse pull rod to drive the running wheel to swing to the left, and when the rail vehicle turns right, the horizontal wheel cooperates with the rail beam to drive the guiding frame to swing and drive the first transverse pull rod to move together, and the second transverse pull rod is driven by the first transverse pull rod to drive the running wheel to swing to the right.

A bogie for a railway vehicle includes a frame, which has a first side beam and a second side beam extending along a longitudinal axis of the bogie and spaced apart from each other. A secondary suspension system is located on the frame and includes a first suspension assembly, which includes a first air spring and a first auxiliary spring positioned at the first side beam. The first air spring is positioned below and is arranged to be pressurized for supporting the body of the railway vehicle above the frame. The first auxiliary spring is fixed to an upper side of the first side beam underneath and spaced apart from the first air spring. The first suspension assembly further includes a first force-transmission mechanism configured to transmit forces exerted by the body on the first air spring to the frame via the first auxiliary spring.

A carbody support device of a railway vehicle, including support mechanisms installed between a front bogie and a carbody and between a rear bogie and the carbody in a traveling direction, and supporting the carbody against the respective bogies. The support mechanisms regulate both the front bogie and the rear bogie inclining in the same vehicle width direction with respect to the carbody when the railway vehicle travels through a curve, while the support mechanisms permit the front bogie and the rear bogie inclining in different vehicle width directions.

A carbody support device of a railway vehicle, including support mechanisms installed between a front bogie and a carbody and between a rear bogie and the carbody in a traveling direction, and supporting the carbody against the respective bogies. The support mechanisms regulate both the front bogie and the rear bogie inclining in the same vehicle width direction with respect to the carbody when the railway vehicle travels through a curve, while the support mechanisms permit the front bogie and the rear bogie inclining in different vehicle width directions.

A carbody support device of a railway vehicle, including support mechanisms installed between a front bogie and a carbody and between a rear bogie and the carbody in a traveling direction, and supporting the carbody against the respective bogies. The support mechanisms regulate both the front bogie and the rear bogie inclining in the same vehicle width direction with respect to the carbody when the railway vehicle travels through a curve, while the support mechanisms permit the front bogie and the rear bogie inclining in different vehicle width directions.

A carbody support device of a railway vehicle, including support mechanisms installed between a front bogie and a carbody and between a rear bogie and the carbody in a traveling direction, and supporting the carbody against the respective bogies. The support mechanisms regulate both the front bogie and the rear bogie inclining in the same vehicle width direction with respect to the carbody when the railway vehicle travels through a curve, while the support mechanisms permit the front bogie and the rear bogie inclining in different vehicle width directions.