The invention provides a low-power radial
welding bogie comprising two wheel sets, a three-piece side
welding beam and a crossbeam. Two ends of the side beam are connected with the wheel sets through primary rubber-
metal pads and bearing saddles respectively. The wheel sets are connected with a wheel set connecting device through the bearing saddles. A crossbeam
assembly is connected with the side beam through two secondary suspension systems. A foundation
brake gear is suspended on the crossbeam
assembly or the side beam. The secondary suspension systems have multiple structural styles, and the wheel sets are of variable- gauge structures. Compared with conventional freight car bogies, the low-power radial
welding bogie has the advantages that the
bogie is good in uniform load performance; defects of cast structure swing bolsters and side frame
casting are avoided; wheeltrack acting force is reduced, and wear parts of the suspension systems are reduced; the variable-gauge wheel sets meet requirements on variable-gauge performance of the bogie; high-speed operation stability of the bogie is improved, and rim wear generated when the bogie passes curves is reduced; the bogie can meet the requirements on maximum
axle load of 30t and highest running speed of 200km / h.