少齿差(包括摆线针轮)传动已应用于很多方面。其传动机构除了销轴式、十字滑块式、浮动盘式和零齿差式以外,还有曲柄式传动机构(见图1)。上述几种传动机构相比,双曲柄式机构的传动效率高,而且噪声较低。但这种双曲柄驱动齿轮系平行四杆机构。理论上要求彼此平行的两杆件等长,实际上对于两曲柄偏心距及齿轮孔间中心距的加工要求很高,而且结构比较复杂,零件数量较多,所以较少推广应用。为了改进这一机构,经过研究,设计制成另一种新的少齿差传动机构(见图2)。这种机构非常简单,动 Less teeth (including cycloid pinch) transmission has been used in many ways. In addition to the pinion drive mechanism, cross slide, floating disk and zero-tooth differential, there are crank-type transmission (see Figure 1). Compared with the above several transmission mechanisms, the double-crank mechanism has high transmission efficiency and low noise. However, this double crank drive gear is parallel to the four-bar mechanism. Theoretically requires parallelism of the two members of equal length, in fact, for two crank eccentricity and gear hole center distance processing requirements are high, and the structure is more complicated, the larger the number of parts, so less popularization and application. In order to improve this mechanism, after researching and designing another new less tooth difference transmission mechanism (see Figure 2). This body is very simple and moving