定轴轮系传动比计算（Calculation of transmission ratio of fixed axis gear train）.doc

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定轴轮系传动比计算（Calculation of transmission ratio of fixed axis gear train）.doc

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定轴轮系传动比计算（Calculation of transmission ratio of fixed axis gear train）

定轴轮系传动比计算（Calculation of transmission ratio of fixed axis gear train） Calculation of transmission ratio of fixed axis gear train Lesson plan text Teaching objective: Familiar with fixed axis gear train, able to analyze transmission line. Grasp the calculation of the ratio of the fixed axis gear train and the determination of the direction of each cycle. Ability target: (1) ability target of method: Train students to analyze the ability of fixed axis gear trains and determine the rotation direction of each wheel; Application of decomposition and combination method in solving complex problems; Train students to find problems and solve problems through classroom exercises. (1) moral education ability goal: 1) cultivate students serious attitude towards learning 2) cultivate students patience and meticulous work style Teaching students in the first few chapters to study a cylindrical gear meshing, and a pair of bevel gears, worm gear and gear rack drive, the key is the size of the transmission ratio calculation; a preliminary understanding of the direction of rotation of the two. The teaching content of this lecture to use relevant knowledge, because the student initiative is poor, so to mobilize the enthusiasm to the book, to review the old knowledge; at the same time for the students basic knowledge is relatively weak, understanding ability is not strong enough, adds the corresponding examples to explain and corresponding classroom exercises, the key analysis and strengthening the teaching contents of this part are I hope, through practice to say is intended to allow students to fully understand Teaching hours 2, key and difficult analysis 1, teaching focus 1) the analysis of the transmission line this is the prerequisite for the calculation of the drive ratio of the fixed axis gear train and the determination of the direction of each cycle. 2) the calculation of the drive ratio of the fixed axis gear train and the determination of the rotation direction of each cycle