A railway freight car bogie is provided which includes a side frame, a bolster and a friction damper. The friction damper includes a wedge, a constant friction damping spring, a variable friction damping spring and an ejector rod. The bolster is provided with a through hole in a bottom plate under a wedge groove. An upper portion of the ejector rod is located inside the constant friction damping spring which is located in the wedge, and a lower portion of the ejector rod is in contact with the variable friction damping spring. The variable friction damping spring in the middle and below the wedge is deviated at a distance in a direction away from a center of the bolster with respect to damping springs at two sides of the variable friction damping spring. An axis of each of the constant friction damping spring and the ejector rod is coincident with an axis of the variable friction damping spring in the middle and below the wedge. The bogie not only has an ideal relative friction coefficient in both an unloaded condition and a loaded condition, a large diamond resistant rigidity, a better vertical dynamics performance and a better transverse dynamics performance; but also overcomes disadvantages of a conventional bogie and can improve structural strength of the bolster significantly, thereby ensuring service performance of the bogie. Figure 1 Figure 2 - 1/3 -
Railway freight car bogie
2019-06-20
Patent
Electronic Resource
English
IPC: | B61F Untergestelle für Schienenfahrzeuge, z.B. Fahrgestellrahmen, Drehgestelle oder Anordnungen der Radsätze , RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES |