Research On Oil Cylinder Float Drawbar Assembling Lifting Mechanism Of Dump Truck

With the development of social economy, the investment in infrastructure projectsis increasing year by year, and the dump trucks are more commonly used in recent years.Dump trucks are equipped with automatic dump devices and featured by automaticdischarging, which can save labor force to some extent. The efficiency of transportationis improved and the transportation cost is reduced. The lifting mechanism, directlyrelated to the whole layout and the performance, is key device of a dump truck. It isconducive to improving the overall performance of dump trucks through the researchand development of more autonomic lifting mechanism, which is also of greatsignificance to improve competitive ability of dump trucks.The oil cylinder float&drawbar assembling lifting mechanism, or F-type liftingmechanism for short, is compact in structure and has higher efficiency. The drawbarshave reasonable stress, which can solve the problem of bearing excessive force at thebeginning of lifting. So the F-type lifting mechanism has been widely used in dumptrucks. In this paper, the parameters of F-type lifting mechanism were designed anddynamic analysis was investigated. The strength verification and optimization ofvulnerable parts were carried out, and the property of hydraulic-mechanical couplingwas investigated through combined simulation.The three-dimensional solid model of every component and the assembly modelwere established in the software of SolidWorks based on the theoretical analysis ofbasic principle&kinematical character of F-type lifting mechanism. The possible staticinterference was eliminated through interference inspection and modifying thecomponent. The dynamic model of F-type lifting mechanism was set up by importingthe assembly model into ADAMS software via data interface between SolidWorks andADAMS. The dynamic analysis was investigated in the software of ADAMS, and theparameters of lifting mechanism were optimized. The results show that the dynamiccharacteristics of F-type lifting mechanism conform to the design requirements.The force on the drawbar and triangular arm are bigger than other componentsaccording to the dynamic analysis of F-type lifting mechanism, and they are the mostdamageable components. The structural strength and stiffness of the drawbar andtriangular arm were calculated under the maximum static load. The stress distributionand deformation condition of the drawbar and triangular arm were obtained through finite element analysis, and the structure of the triangular arm was optimized. Theresults show that the strength and stiffness of the drawbar and triangular arm conform tothe design requirements.The hydraulic system is the power supply of lifting mechanism, which is importantand inseparable. The hydraulic model was established in the AMESim software basedon the theoretical analysis of the lifting hydraulic system. The dynamic model andhydraulic system model were integrated through the module interface between ADAMSand AMESim, and a combined simulation platform of lifting mechanism system wasestablished. Research on the real-time dynamic simulation was carried out by using thecombined simulation platform. The hydraulic-mechanical combined simulation oflifting mechanism system was investigated, which could make the best of ADAMS andAMESim, and the simulation results were more accurate. Kinematical character oflifting mechanism system was also investigated according to dynamical parametersobtained from combined simulation. The variation rules of relevant parameters obtainedfrom combined simulation further confirm that the design of F-type lifting mechanismis correct.