Research On Dynamic Characteristics Of Forklift Drive Axle

In modern industrial production,forklift is a kind of special vehicles for handling materials.It is still widely used in a variety of places,such as warehouse,production workshop,port and wharf,etc.It has a compact vehicle,flexible maneuver and simple operation,which is easy to work in a relatively small space and channel.With the development of industrial technology,its application function and efficiency of the forklift are gradually improved.However,market orientation and user needs also promote the upgrading of the performance of the forklift.In the transmission system of the forklift,the driving bridge is an indispensable part of it,which mainly plays the role of deceleration and increasing distance,differential speed,transferring force.Because of low speed,large drive ratio and high load,the dynamic characteristics of a forklift drive bridge have an important effect on its working efficiency and service life.Therefore,the 3 ton forklift truck drive bridge is considered as the research object in this paper to research on the dynamic characteristics of its working process.First,it is based on the overall structure and function of the forklift drive bridge.Design and check the dimensions of each part in it.Then use the 3D modeling software Creo3.0 to modeling accurately and interference checking to complete the whole model assembly.Secondly,using the seamless connection with the dynamic analysis software ADAMS,The multi rigid body dynamic model of the driving bridge is established in ADAMS by the method of fractional introduction.According to the theory of structural dynamics,ANSYS software is used to analyze the modal analysis of the key components in the drive bridge.The rigid parts in the multi rigid body dynamic model are replaced by the generation of the flexible body neutral file.Then a rigid flexible coupling dynamic model is established.By comparing the torque value of the output speed of the model to the theoretical value in a working state of the model,it can verify the correctness of the model.Finally,it is based on the correct model of rigid flexible coupling,setting different loading time respectively,and the simulation time,the step length,the input speed,the torque and so on are the same.The sequence of model simulation is that the simulation results of the model are different under different loading times.The simulation results are closest to the real results when the loading time is 0.1s.On the basis of this,all input speed and torque of a forklift drive bridge are applied to the model in turn.Detection of vibration of a driving bridge is that the fluctuation coefficient of the output speed of the half shaft increases slowly without the influence of external excitation,such as frame,door frame,etc.That is to say,the vibration of the drive bridge is gradually increasing,which provides the basis for the design of the driving bridge and the vibration and noise reduction.The dynamic characteristics of the rigid flexible coupling dynamic model of a forklift drive bridge are studied and analyzed,which provides a reference for improving the vibration damping performance and service life of the forklift truck.