| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable soft/hard switching of support rigidity in a coupling part between a shaft beam and a side beam without significantly changing an existent bogie structure.SOLUTION: A support unit 30 provided at a coupling part 22 between a shaft rubber holding bracket 18a provided at the tip of a shaft beam and a bogie frame 14 includes a plurality of cylindrical shaft rubbers 32, 34 arranged with center axes directed in the vertical direction. Changing the sum total of support rigidities of the plurality of these shaft rubbers 32, 34 enables soft/hard switching and enables a railroad vehicle bogie 10 to be given a steering characteristic of a wheel shaft 28 corresponding to a rail track line shape. An outer periphery 34a of the second shaft rubber 34 is fixed on the shaft rubber holding bracket 18a fixed at a tip of the shaft beam 18. Further, a rigid body pin 44 is so constituted as to advance and retract with respect to an inner periphery 34b of the second shaft rubber from both top and bottom sides of the inner periphery 34b.</p> |
