Backhoe hydraulic excavator, as a common earthwork machinery in engineering, is of great importance for construction sites, water conservancy construction, mining and other projects that need to break the soil. In view of the backhoe hydraulic excavator working device usually plays the role of force application and stress in operation, on the basis of long-term load change, the working device is prone to fatigue damage. If the damage accumulates to a certain extent, it will cause fatigue damage, which has great potential safety hazard for the normal operation of the excavator. Anti fatigue design can effectively solve the problem of fatigue failure of excavator components, and the first step is to get the load spectrum under the actual working state.
