分类： 机械工程 >> 机械设计 提交时间： 2018-03-14
摘要： Precision reducer is one of the key parts of an industrial robot, which generally incorporates cycloidal planetary drive. Engagement of the cycloidal wheel and the pins causes rolling friction between the wheel and the pins as well as sliding friction between the pins and the pin housing in the traditional cycloidal transmission of the reducer. In this paper, we present a new kind of design to make the pins and the pin housing a whole structure, thereby the cost of manufacturing and assembly can be significantly reduced. And in this new structure, we only need to consider sliding friction between the cycloidal wheel and the unibody of the pins and pin housing. The difference between the new structure and the conventional structure in the meshing properties was given. In addition, we used finite element method to analyze the friction and contact stress between the cycloidal wheel and the pins in the actual working condition, and compared it with the traditional structure. The simulation results proved the feasibility of the new structure and provided a theoretical basis for further design and manufacturing of this new kind of cycloidal planetary drive structure.
分类： 机械工程 >> 机械设计 提交时间： 2018-03-14
摘要： 摆线行星传动通常通过摆线轮与针轮相啮合，以实现传动。摆线轮的轮廓一般是摆线。本文介绍了摆线传动的两种类型，一种是外摆线的内偏置，另一种是内摆线的外部偏移。在AutoCAD中构造了两种类型的三维模型。利用机械系统动力学仿真技术进行动力学仿真，并通过运动曲线验证了动力学模型的正确性。计算了两种类型摆线轮与针齿之间的动态啮合力，并对传动特性进行了比较。实验结果表明，内摆线传动能产生更稳定的输出速度，并能降低啮合力。
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