Axle-free active steering independent wheel positioning device for rail transit vehicle

The invention discloses an axle-free active steering independent wheel positioning device for a rail transit vehicle, and belongs to the field of independent wheel positioning devices for special rail vehicles. The device comprises a left wheel mounting flange, a right wheel mounting flange, a left wheel driver, a right wheel driver, a left wheel rotating main shaft, a right wheel rotating main shaft, a left wheel positioning middle body, a right wheel positioning middle body, a left wheel A-shaped upper pull rod, a right wheel A-shaped upper pull rod, a left wheel A-shaped lower pull rod, a right wheel A-shaped lower pull rod, a steering actuator, a steering mechanism, an anti-side-rolling torsion bar, an air spring and a controllable damping shock absorber. According to the invention, the central part on the U-shaped train floor is allowed to pass through the gap, and the structural design of slopes and steps on the train floor is canceled, so that the 100% low floor of the whole train is realized. 轨道交通车辆用无