逻辑齿轮是一种具有独特齿形的新型齿轮，这种“逻辑型”齿形不是象渐开线齿轮的齿形那样由单一的曲线构成，而是由许多不同的微段曲线连接而成的。这样的齿形使它不仅能采用凸凹相对的啮合形式，而且由于在微段曲线接合点啮合时相对由率为零而有较高的强度和寿命。本文在分析逻辑齿轮啮合状况的基础上，重点提出了逻辑齿轮的重合度和滑动系数的计算原理，以及初步的分析研究结果。 A logical gear is a new type of gear with a unique toothed profile that is not made up of a single curve like the profile of an involute gear but is made up of many different micro-segment curves . Such a tooth shape makes it possible not only to adopt the form of relative engagement of concavities and convexities but also to have a higher strength and longer life due to the relative yield of zero at the engagement of the micro-section curves. Based on the analysis of the state of logic gear meshing, this paper puts forward the calculating principle of coincidence degree and sliding coefficient of logic gear and the preliminary analysis and research results.