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With China's basic construction and the rapid development of construction industry, especially the highway and the development of high speed railway, the self-propelled hydraulic hammer (hereinafter referred to as mobile crusher) increasing demand, however our country the current mobile crusher manufacturing enterprise is less, to adapt to the country to develop infrastructure needs, researching and developing mobile crusher is very necessary. In this paper, the mobile crusher work characteristics were analyzed and determined the crusher work device and frame strength analysis of typical working conditions, including three cylinder full stretch broken, broken hydraulic cylinder full stretch crushing, lifting cylinder full shrinkage crushing, horizontal crushing, vertical crushing, three cylinder full shrinkage 36 degrees Angle broken, broken hammer cylinder full shrinkage vertical crushing, elevated hammer broken and so on, to determine the various modes of the load. Established the frame, work unit and broken hammer 3 d model, based on ANSYS software of key parts of the strength and stiffness are analyzed, then according to the results of analysis, puts forward the work unit and frame design improvement method. The paper work for the mobile crusher frame and working device is designed to provide the basis.
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