Structural Design And Analysis Of The Dynamic Assembled Screw-driven Device

The dynamic assembled screw-driven device is a new kind of mechanical driving device with innovative structure and excellent performance. The assembled hollow screw is contrived by combining the two usual mechanical designed methods divorce and combination together, which with the skillful designed motionlink system the dynamic assembled screw-driven device could transmit stably. The assembled hollow screw and the inner core is the main part of the screw-driven device for stable transmission and valid carrying ability. So it is the central work to research it’s mechanism and do the structure analysis. For this paper, two kinds of the dynamic assembled screw-driven device projects are put forward, and finally the radial nested screw-driven device with better performance is chosen for further research. The holistic project design, the theory analysis,the finite element simulation, and the device test For this screw-driven device has been accomplished in the paper. To sum up, the main results in this paper contain the following areas:(1) The holistic project design for the dynamic assembled screw-driven device. The radial nested and axial nested dynamic assembled screw-driven device projects are put forward. By introducing and contrasting the structures, the transmission characteristic, and completing the modeling in the two kinds of the projects, the radial nested screw-driven device has much more advantages like the better performance and simpler structure for producing and servicing. So the radial nested screw-driven device is chosen for this paper as the research object.(2) The transmission characteristic and the carrying capacity analysis. Based on the size and the motion character of the hollow screw and the inner core of the motionlink, the screw-driven device’s transmission characteristic is summed up. To calculate and analysis the hollow screw as the flimsy hollow cylinder, and the oriented teeth as the cantilever beam, the basic carrying capacity analysis conclusion of the hollow screw has been summarized.(3) The finite element simulation of the hollow screw and the inner core of the motionlink. To do the statics and model simulation for the hollow screw based on the ANSYS Workbench. Based on the hollow screw’s stress variation trend in the different parameters from the finite element simulation result, the general rule of the hollow screw’s carrying capacity is summarized. And to do the statics and model simulation for the inner core of the motionlink, the load characteristic of the hollow screw and the inner core of the motionlink has been analysed in the static load process.(4) The dynamic assembled screw-driven device test. Based on the former design and analysis, and the the transmission lift experiment of screw-driven device is tested on the model device made by the research group.