| 摘要 |
PROBLEM TO BE SOLVED: To make an axle spring rubber in an axle box suspension of railroad rolling stock low permanent set in fatigue and high electric insulation, and at the same time, a damping characteristic excellent. SOLUTION: The vibration control device 36, which has a housing comprised of an inner metal fitting 28, a collision mass 40 that is provided to the inside of the housing in a floating state and collides with the housing in the case of vibration, openings S1 and S2 formed between the housing and the collision mass 40, and a layer of a rubber elastic body 42 formed on the surface of the outer circumference of the collision mass 40, is assembled to the axle spring rubber 24 provided with an outer cylinder metal fitting 26, the inner metal fitting 28, and the rubber elastic body 30 sandwiched between them.
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