Truck for railcar
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United States of America Patent
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Mar 19, 2019
Grant Date -
Aug 11, 2016
app pub date -
Oct 25, 2013
filing date -
Oct 25, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
There is provided a three-axle truck for a railcar having three wheelsets in a truck frame of the one truck, in which in each of the wheelsets, axle boxes are supported by the truck frame through axle springs, the truck frame has a structure for supporting a carbody whose weight is variable, and making variations in axle loads on the respective wheelsets be maintained at a preset value or less in spite of change of the carbody weight, and in this structure, spring constants of the both-end axle springs in the respective wheelsets located at both ends of three axles are set to be larger than a spring constant of the middle axle spring of the wheelset located in the middle.
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