齿轮—五杆组合机构连杆曲线特性的研究

【作者】 姜爱国；

【导师】 葛文杰；

【作者基本信息】 西北工业大学 ， 机械设计及理论， 2003， 硕士

【摘要】 齿轮—五杆机构由于比铰链四杆机构具有更多的参数，因而它能够实现比四杆机构更为丰富的轨迹，并且其轨迹曲线往往比较复杂而难以预测。由于齿轮—五杆机构中的参数比较多，故研究各参数对齿轮—五杆机构轨迹曲线的影响也变得困难一些。 本论文主要研究了齿轮—五杆机构中与机架相连的两连架杆的双曲柄的存在条件、齿轮—五杆机构的分类以及在每一分类中齿轮—五杆机构能够整周转动时其相位角和传动比的范围。然后，针对能够整周转动的齿轮—五杆机构，研究了其上的一点在齿轮机构的传动比、初始相位角、杆长以及两杆之间的夹角变化时的轨迹曲线以及速度和加速度曲线的情况。 首先根据N杆机构的理论，得到了五杆机构的分类以及五杆机构中两相邻杆的夹角为周转角时的充分必要条件以及五杆机构能够整周转动时的充分必要条件。然后详细的讨论了五杆机构在每一种分类情况下机构中存在双曲柄时机构的传动比及相位角的范围。根据该条件所得到的算法，以Windows为平台，以面向对象的Visual C++6.0为开发工具，开发了一套智能化的齿轮—五杆机构的轨迹生成软件系统，实现了机构参数的可视化输入、机构的轨迹曲线、速度和加速度曲线的动态生成，从而实现了齿轮—五杆机构轨迹曲线的动态模拟。 以该软件系统为平台，研究齿轮—五杆机构中的各参数对轨迹曲线的影响。由于齿轮—五杆机构轨迹图像的可控参数比较多，我们就详细的讨论了在只有一个参数改变时机构的轨迹图像变化情况，然后总结了齿轮—五杆机构在齿轮的传动比、初始相位角、杆长以及两杆之间的夹角变化时的轨迹曲线的变化规律。这对利用轨迹来设计齿轮—五杆机构中的各参数具有很重要的指导意义。更多还原

【Abstract】 The geared five-bar linkage has more dimension parameters than four-bar linkage, so it can realize more versatile locus curves and its curves are complex and unpredictable. Then it’s more difficult to research geared five-bar for it’s more parameters.The existence of a C-C (crank-crank) type of geared five-bar linkages linked with the ground link , the classification and the range of gear ratio and phase angle in the fully rotatability of geared five-bar linkages were mainly studied in this dissertation. Then the locus curves of one point in the geared five-bar were studied with the change of the gear ratio, the phase angle, the bar length and the angle between two bars.The necessary and sufficient conditions for the input angle to be rotatable angle of N-bar linkages and the rotatability of five-bar are firstly proved according to the theory of N-bar linkages. Then we conclude the five-bar’s classification and the gear ratio and phase angle in each classification to be full rotatability. According to the algorithm, with the tool of Visual C++6.0,1 developed a set of intelligent software to dynamically create geared five-bar’s locus curves and velocity and acceleration curves, achieve the visualized input.On the software platform we studied the effect of the five-bar’s parameters on the locus curves. Because there are several parameters to control the locus curves, we particularly presented the locus curves in the case that only one parameter change while others remain. Finally, we concluded the law of geared five-bar’s parameter to effect orbit curves. This is very helpful to design geared five-bar’s parameters using locus curves.更多还原