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Load measuring device for railcar bogie

  • US 10,422,685 B2
  • Filed: 12/22/2014
  • Issued: 09/24/2019
  • Est. Priority Date: 12/25/2013
  • Status: Active Grant
First Claim
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1. A load measuring device for a railcar bogie in which a first elastic body constituted by a vibrationproof rubber or a suspension spring is interposed between an axle box and a bogie frame, the load measuring device comprising:

  • a first load fluctuation sensor disposed in parallel with the first elastic body, the first load fluctuation sensor being configured to deform in conjunction with elastic deformation of the first elastic body in a first direction that is one of either (i) a vertical direction with respect to the railcar bogie, or (ii) a lateral direction with respect to the railcar bogie, the first elastic body supporting a downward load from the bogie frame, the first load fluctuation sensor being configured to vary an electric output based on changes in electrostatic capacitance of the first load fluctuation sensor resulting from the deformation of the first load fluctuation sensor in conjunction with the elastic deformation of the first elastic body in the first direction, the deformation of the first load fluctuation sensor is parallel and directly proportional to the deformation of the first elastic body.

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