FRICTION DAMPING SYSTEM FOR A RAILWAY TRUCK

摘要

A railway truck has two wheel sets, a bolster, and two side frames each havinga bolster opening. At least one friction plate is connected to one of thebolsteropenings, a car body, and end portions of the bolster and extends generallyvertically.Two suspension assemblies operatively connect the bolster to the side frames.Eachsuspension assembly includes at least one load supporting spring biasing acorresponding end portion of the bolster upwardly, two wedges disposed oneitherside of the at least one friction plate, and two springs biasing the wedges.Each wedgehas a generally vertical and a sloping face. The two springs bias the slopingfaces ofthe wedges against corresponding sloping faces provided in one of the bolsteropenings and end portions of the bolster such that the generally verticalfaces of thewedges are pressed into contact with the at least one friction plate.