Bogie

1878. Bogie Trucks for Railway Locomotives, &c.: [...] Fig. 1 is a cross section and Fig. 2 a section plan of a bogie. A curved casting a is fixed to the engine and a wrought-iron beam or beams b are connected to the bogie frames by links c fitted with or without springs d.

Source: wiktionary

The soil all along this portion of the route is so elastic and the line so straight and level that the train goes humming along without jar or vibration, and the sensation in these cars, with their six-wheeled bogies and well arranged springs, is more like what one imagines flying to be than a mere matter-of-fact railway journey.

Source: wiktionary

An empty train was by mistake sent into the rear of an ordinary train standing at the station Rathausbrücke. The two colliding car-ends were damaged and the bogie of the standing train was lifted off the supporting rail so that its wheels settled by the side of the rail. Neither train fell, however, and nobody was seriously hurt.

Source: wiktionary

We then had to endure a four-hour-long change of bogies at Brest - from the Soviet 1520mm-wide gauge to the 1435mm Polish and West European - when our carriage, with passengers inside, was lifted off the track by giant railway jacks, giving us a brief and not entirely unpleasant feeling of levitation.

Source: wiktionary