Bogie pivot arm integral with the positioning

The present invention relates to a bogie of a rail vehicle, particularly to a bogie of a rail vehicle positioning means, technical field of mechanics. The present invention simplifies the axis of the housing and the clamp structure is more simple and compact, can be directly mounted on press-piece bearing shaft, the entire structure small component parts exploded, easy assembly, easy maintenance and adjustment, and greatly simplifies the process tooling. In addition, its design is simple in structure, can be cast as a whole, to ensure the safety and reliability to achieve light weight and low cost structure at the same time. More importantly, the use of a unitary whole wheel positioning the boom to achieve reduction in weight of the positioning device, which can effectively reduce the mass of about 80kg bogie spring, while ensuring good comfort case, help to improve the safety and stability . As a mature structure of the program is widely used in rail vehicle bogie system.