Research On Crawler Traveling Equipment Of Elevated Bulldozer

The ground adaptability of crawler bulldozer is good and the efficiency is high, soit has been widely used in open pit mining, water conservancy and hydropower andnational defense building occasions. Bulldozers working conditions are relativelypoor, so it’s traveling equipment reliability for higher. We can find the inadequaciesearly and feedback on the design timely by using virtual prototyping technology, Itwill improve product quality while reduce development cycles, reduce costs, is anew approach to product development.Firstly, this paper introduces the crawler bulldozer traveling equipment researchStatus, and then starting from the soil mechanics, explain the interaction between thecrawler and the ground by talking about the soil strength theory and the soil pressuretheory. Introduce principle of traveling system and provide a theoretical basis for thelater work.This paper combine with elevated bulldozer project, establishing the multi-bodydynamics model of elevated bulldozer traveling equipment by the Track LM moduleprovided by RecurDyn. Combine with simplified rigid model of bulldozerestablished in Pro/Engineer, form a complete model of the elevated bulldozer. wecreate a virtual road to complete the elevated bulldozer geotechnical conditions,ripper conditions, Turning conditions, climbing the30°gentle slope conditions,passing300mm depth shallow pit conditions, through300mm height raisedconditions, driving on slope conditions and no-load straight-line driving conditions,totally8conditions.Aiming at mechanical characteristics of different parts of elevated bulldozer, selectthe simulation results of one condition which can describe the mechanicalcharacterization best to analyze. Including crawler pressure distribution analysis, theroad wheel lateral force analysis, the drive sprocket stress analysis. We select the load wheel vertical force simulation results of no-load straight-linedriving and geotechnical conditions as the analysis object, to analyze the pressuredistribution of the crawler. We obtained that the crawler pressure distribution close touniform distribution when normal driving, due to adopt elastic suspension. Thoughthe center of gravity backward because the role of working resistance whilebulldozing. The pressure distribution presented to trapezoidal distribution which theback larger little than the front.We select the load wheel lateral force simulation results of slope driving andturning conditions as the analysis object, to analysis load wheel lateral force. Weobtained that the bilateral load wheels are the main lateral force withstand elements,and during turning, the road wheel lateral force is distributed symmetrically to thecenter of turning, and the stress values of each road wheel(bilateral) is proportionalto the distance to turning centerline.We select mechanical characterization of the center of drive sprocket simulationresults which get from climbing the30°gentle slope and through300mm heightraised conditions as the analysis object, to analysis the force of drive sprocket. Weobtained that the force of drive sprocket is related to the change of crawler-driventension when adopt elevated traveling equipment, and the road raised obstacles donot have a direct shock load on the drive sprocket.Through analysis and simulation of crawler traveling equipment of elevatedbulldozer, study the mechanical characteristics of traveling equipment. Provide animportant reference about structure improve of traveling equipment.