Design And Simulation Analysis Of A Replaceable Triangle Track Wheel Of 50 Type For Military

Traditional tyred engineering emergency vehicles are characterized by fast speed,good maneuvering performance, convenient maintenance, but tires are easily slipping and sinking, when they are marching and working on special roads with sand, mud,snow and ice and other special road conditions which even leads to instability of the vehicles’ center of gravity, reducing the vehicles’ performances. To face the complicated battlefield and daily emergency rescue missions in troops and better cope with tasks during the wartime and peacetime periods, it is urgent to develop a new type moving mechanism to improve the existing equipments and enhance their adaptabilities in severe environments.Replaceable triangular crawler wheel as a new type of moving mechanism, it is combined with the advantages of the tire and the triangular crawler wheel mechanism. It not only improves the vehicles’ performance but it also maintains the vehicles’ mobility.The triangular crawler wheel is light; no special requirements are met for the vehicle chassis and fast interchange can also be realized between the tire and the triangular crawler wheel at the same time. Therefore, it can be applied in military engineering emergency equipments to can improve vehicles’ adaptabilities in severe environments effectively and expand equipments’ application range. This thesis focuses on a 50 type loader, key engineering emergency equipment and tries to develop its matching triangular crawler moving wheel mechanism.Firstly, based on the technology of replaceable triangular crawler wheel and the actual application requirements of engineering emergency equipments, the layout and components of the moving mechanism of a type 50 loader for military are put forward in this thesis.Secondly, main parameters of base frame, driving wheel, supporting wheel system,suspension and tensioning device, crawler wheel and other key components were selected. Base frame adopts intermediate supporting as overall structure to cope with the bearing problems of crawler wheel; supporting wheel system uses uniaxial independent damping model to solve the vibration, deviation and tension of crawler wheel vehicle.This thesis also puts forward setting rubber crawler wheel outboard to improve tensile strength of rubber crawler wheel and enhance the durability of the rubber crawlers.This thesis also makes simulation analysis in the main components of the modeling and finite element by Workbench ANSYS simulation software to calculate the stress and strain of the components under extreme conditions. It also tries to analyze whether the strength and hardness of the components are in accordance with the design requirements.Finally, this thesis tries to build a virtual mechanism of triangular crawler wheel by simulation software of multi-body dynamics and makes simulation-based verification test about the design parameters, the steering, climbing ability, trench crossing capacity and vertical obstacle overcoming ability etc. It also makes a simulation analysis in maneuverability of the vehicles in actual conditions, road conditions, velocity, steering angle and other parameters.