SELF-STEERING FLATCAR AND RAILROAD VEHICLE USING HAVING THIS SELF-STEERING FLATCAR APPLIED THERETO

摘要

[PROBLEMS] To provide a self-steering flatcar improved in travel stability and in curve passage performance, and a railroad vehicle having this self-steering flatcar applied thereto. [MEANS FOR SOLVING PROBLEMS] An active steering damper (10) drives a DC motor (13) to turn a ball screw (15) to thereby spirally advance a nut (16) threadedly engaged with the ball screw (15) to effect expansion and contraction of the whole, whereby a wheel shaft (2) is steered through a steering link (6). This steering is effected by an active function possessed by the active steering damper (10). This active function solves the problem of a response delay in the self-steering operation in a process from a straight line to a steady curve via a transition curve. Further, the active steering damper (10) also has a passive function. This passive function acts as a rigid body on a vibration of meandering frequency generated during linear travel or the like and for vibrations of other frequencies, it serves as a non-rigid body to exhibit a buffer action. Thus, high speed linear travelability and passability in a steady curve region are improved.