准双曲面齿轮是齿轮传动的普遍形式，弄清它的几何设计原理具有十分重要的意义。
Hypoid gears represent the most common form of gear driving. It is of great significance to clarify their geometric design principle.
准双曲面齿轮与普通圆锥齿轮相比，具有重合度大、齿面接触应力低、传动平稳、冲击和噪音小、承载能力高和寿命长等优点。
Compared to bevel gear, hypoid gear has larger overlap coefficient, lower gear contact stress, more smooth transmission, lower impact and noise, higher load bearing capacity, longer life and so on.
弧齿锥齿轮和准双曲面齿轮(以下简称锥齿轮)广泛用于车辆传动中，锥齿轮的传动噪声以及平稳性是影响整车性能的重要因素。
Spiral bevel and hypoid gears have been widely used in the transmission system of automobile as one of the key parts.
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