机械类外文文献翻译

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Abstract: A novel method of realizing the optimal transmission of the crank-and-rocker mechanism is presented. The optimal combination design is made by finding the related optimal transmission parameters. The diagram of the optimal transmission is drawn. In the diagram， the relation among minimum transmission angle， the coefficient of travel speed variation， the oscillating angle of the rocker and the length of the bars is shown， concisely， conveniently and directly. The method possesses the main characteristic. That it is to achieve the optimal transmission parameters under the transmission angle by directly choosing in the diagram， according to the given requirements. The characteristics of the mechanical transmission can be improved to gain the optimal transmission effect by the method. Especially， the method is simple and convenient in practical use.
Keywords：Crank-and-rocker mechanism， Optimal transmission angle， Coefficient of travel speed variation
INTRODUCTION
By conventional method of the crank-and-rocker design， it is very difficult to realize the optimal combination between the various parameters for optimal