Abstract In order to improve China's railway freight capacity， and can better adapt to the existing railway line bridge， the actual state of development of load 70t， axle load 25t new GM vehicle has become an important 70t class in this new type of general goods on behalf of the C70-type models based on the general development of the gondola car design high side gondola car， named C70GB High side gondola car C70GB Department of General gondola car， the vehicle for the quasi-gauge railway in China， big shipment of goods， or the proportion of small goods in bulk， can be used for self-organization of fixed rail In a given vehicle performance and size parameters of the main conditions， the completion of the overall vehicle design and large parts， including chassis， side wall， side walls， doors and other structures， as well as the hook relief device， the selection of the Combination of design requirements on goods 70t-class key technologies and design ideas， including the lightweight body design， 25t axle load bogie Pre-design work of the main research process， analysis of issues in program selection and design， and finally through the computer graphics software to complete the overall design of vehicles and parts， in this paper based on the combination of drawing and calculation of theoretical analysis and presentation of Through the introduction of new materials， new technologies and new structural design C70GB from the high side gondola car technology to improve vehicle performance， increase rail freight capacity， China has laid a railway truck load 70t from 60t-class upgrade to the basic Keywords: gondola car; technical parameter; structure; bogie
