| The strong mobile performance of the Explosion-proof rubber-tired vehicle greatly enhance the production efficiency of the coal mining industry,which prompted the rapid development of the design and studies for articulated rubber-tired vehicle at abroad.Due to the late start of study specific to the mining articulated rubber-tired vehicle,the current design theory of it is not yet perfect and remains in imitation stage.The articulating steering mechanism is an important part of the rubber-tired vehicle,it’s related to the motor’s mobility directly,Mine rubber-tired vehicle is used in the underground,where full of rock,and the rubber-tired vehicle itself is more vulnerable to obstruction,easier to be damaged.Therefore,In this paper,make a study of the performance of rubber-tired vehicle under the conditions of obstacle,and improve the structure of the articulated steering mechanism according to the actual problem and the analysis result.The main findings are as follows:Select rectangular steps as the typical road conditions,Using ADAMS and AMESim to establish the mechanical-hydraulic co-simulation Model of articulated rubber-tired vehicle,analyze of the vehicle load distribution and steering stability and other properties in the steering situation,and make the transient dynamic simulation of the rubber-tired vehicle based on ANSYS.At finally,we can find there are too large torque,Stress concentration and Poor roll stability problems in the Explosion-proof rubber-tired vehicle.In order to verify the reliability of the mechanical-hydraulic co-simulation Model,made a obstacle surmounting experiment of the Explosion-proof rubber-tired vehicle,it is found that the experimental results are similar with the simulation results,It is reasonable to show that the model of the mechanical-hydraulic co-simulation Model is reasonable,Can be used as a tool for the study of Explosion-proof rubber-tired vehicle,and testify the problems are exist that the simulation have found.In order to solve the problem of rubber-tired vehicle,improve the structure of the rubber-tired vehicle articulated steering mechanism,Introduced a two degrees of freedom hinge plate,established two degrees of freedom rubber-tired vehicle,make a Study of newly established two-degree-of-freedom articulated vehicle model,Contrast with the original simulation results,Found the torque,Stress and roll stability aspects have been improved,Solved the problem that was first discovered.For the newly established two degrees of freedom rubber-tired vehicle,in order to analyze the performance of obstacle surmounting,establish the mechanical model that crosses the step obstacle,and then calculate the limit height of the obstacle,redesign the geometric dimensions of the rubber-tired vehicle hinge plate by maximizing the limit height,at finally,achieve the purpose of optimizing the two degrees of freedom rubber-tired vehicle’s obstacle surmounting performance.The results of this article can provide some theoretical basis for the design of the steering mechanism in articulated rubber-tired vehicle. |
