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论述了渐开线锥蜗杆蜗轮Ⅱ传动的几何原理，它实质上是渐开线变厚齿轮交错轴传动；推导了无侧隙关系式．它一侧齿面是点接触，另一侧齿面属于线接触．齿面接触强度高，便于齿面精加工。
The geometry principle of involute cone worm worm gear Ⅱ transmission is discussed. It is essentially involute thickening gear crossed shaft drive. No backlash relation is deduced. One side of the tooth surface is point contact, the other side of the tooth surface is line contact. Tooth surface contact strength, easy tooth surface finishing.