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nformation films too early, and this will greatly reduce the work efficiency. In a word, in order to improve the work efficiency, catching and carrying the films should be pleted by mechanical systems automatically.This design aims to meet this requirement. The system can catch and carry the film automatically in the environment of mass of ozone. So it improves the work efficiency greatly . The mechanical structure of this system can be divided into two parts, the upside part as carrying department and the underside as automatic catching department. Of them , the motor drives two active wheels through the decelerating system. Then, the active wheel pull the whole system to move forward or backward on the preconcerted tramroad. The automatic catching department can safely realize catching film and it is posed of two special holding structure jointed by one mechanical arm, it can catch the film safely. The catching department is a new bination of the mechanism and electron equipments, it realizes the catching and loading action by the contraction and extension of the electromagnets. So it can catch and load the film very fast and frequently.……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….Key words: Filmcatchinganddelivering system,Delivering vehicles,catching structure 目 錄任務(wù)書(shū)i中文摘要iiABSTRACTiii第1章 緒論1 設(shè)計(jì)背景1 系統(tǒng)簡(jiǎn)要介紹1第2章 機(jī)械系統(tǒng)總體設(shè)計(jì)