The rapid development of economy and the speeding up of urbanization, urban traffic is facing huge pressure, especially large and medium-sized cities, the existing traffic system increasingly become one of the bottleneck of sustainable economic development.Foreign experience shows that the urban rail transit system is an effective solution.As the vehicle system dynamics, the improvement of the theory of wheel/rail relationship, vehicle bogie is improved in terms of structure and performance, makes the performance of the vehicle to improve.Urban rail vehicles from an early body bearing in uniaxial model to two by more than two shaft and axle bogie support, two axle bogie has become the main type of bogie in today's all kinds of railway vehicles.Typical of the new type bogie are mainly inside hanging type bogie, the single axle bogie and articulated truck, etc.
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