关键词: 重型自卸车；牵引装置；潜在失效模式及后果分析；Hyperworks；台架试验

Abstract: According to the non-highway transportation conditions such as urban construction slag soil and mining area, the traction device of heavy dump truck is designed and studied in order to avoid the potential failure modes such as the bending of crossbeam, the fracture of device and the failure of threaded hole during the traction process, effectively reduce the loss of design quality, improve the design quality control level. The traction device is installed between the left and right extension beams. The left and right connecting seats meet the installation requirements of the left and right brackets of the bumper, the design should pay attention to the functional requirement, the strength requirement of the parts, the DMU check of the surrounding environment and the installation space of the front hook hand. When the vehicle is stuck in a mud pit, the towing hook can be connected with the towing device and the trap can be solved by dragging. In this paper, Hyperworks software is used to carry out three-dimensional modeling and stress analysis of the three plans of the traction device in the design phase, the design scheme should take into account the manufacturing process, assembly feasibility and economy of the parts and components, and determine the best scheme by synthesizing all factors, through the strain test and strength test, it is concluded that the parts meet the demand of heavy dump truck’s traction condition, and the application of the parts is tracked after they are put into the market in batches.

Key words: Heavy dump truck; Potential failure mode and consequence analysis; Hyper-works; Bench test