Design And Research On The Split Universal Drive Shaft With Double Joint Crosses Of Loader

Loader is one kind of widely used engineering machinery.It plays an important role in the railway,highway,construction,water and electricity,port and dock,national defense and other projects.The universal drive shaft with double joint crosses is an important part of loader.Because of its inherent structure,the traditional universal drive shaft with double joint crosses produce a variety of problems easily such as cross shaft axial movement,universal joint fork port deformation and difficulties in assembling after using a long time.In order to solve these problems,a new type of double cross universal drive shaft is designed and studied in the paper.In the article,the major elements and results are as follows:1.The traditional structure of double cross universal drive shaft is studied and the reasons for the above problems are analyzed.The new structure is designed on the basis of the original drive shaft structure.The different coupling schemes between the transmission shaft with the transmission box and the driving axle are analyzed,and the connection mode of the spline sleeve fork is determined to use.The reasonable partition scheme of the drive shaft is explored,and the model is determined to use that both sides of the cross section is split while section fork on intermediate propeller shaft is not split.The reasonable scheme of the axial position of the cross shaft is obtained.The reasonable split scheme of the spline forks is obtained.According to the parameters of the loaders and the design requirements of the enterprise,the part of the spline sleeve is designed.A virtual assembly model of spline cross and cross shaft is established.2.The kinematic model and the constraint equations of the split double cross universal drive shaft are established.The condition of equal-speed transmission of the split double cross universal drive shaft is determined through the analytic method.The relationship on the angular speed of the drive shaft,the intermediate shaft and the driven shaft is obtained.By setting different angles between the axes in the ADAMS software,the constant velocity transmission performance of the split double cross universal drive shaft is verified.The dynamic analysis of the split double cross axle is carried out,and the dynamic equation of the drive shaft is established.The type of torque of the cross shaft is analyzed.3.The static analysis,the modal analysis and the life appraisal to the product through the Workbench module of ANSYS software is carried out.The single arc transition curve which causes stress concentration of the cross shaft is optimized.The form of arc and straight arc as the transition curve is determined and the optimal combination of arc radius data is obtained.4.Experiment on the angle of the trial production of split spline sleeve is carried out.The experimental results show that the maximum combined angle between the split spline sleeve fork and the spline shaft fork is 28.47 degrees,which meets the design requirements.Assembly experiment is carried out on the spline sleeve fork and cross axle,and the cross shaft can be smoothly mounted in the spline sleeve fork.The dynamic balance experiment is carried out to the whole transmission shaft,which improves the quality distribution of the transmission shaft.The split double cross universal drive shaft is designed to overcome the structural problems of the traditional transmission shaft,which can improve the assembly efficiency and meet the design requirements of the enterprise.