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同步运转是动力传送中的一个理想特性。最初它是由链条传动获得的。在传动中链条直接与链轮啮合,以防滑动,确保同步运转。因为链条传动中的张力比转矩传动中的张力低,所以链条传动大大减少了传动轴的轴承负荷。不过,链条传动也有其不足之处。链条在链轮上不均匀起伏发出噪音;构件很重,限制了缘速;而且经常需要适当润滑。在这些影响有效动力传送的缺陷中,有许多首先在大约三十年前随着同步橡胶机带拖动的发展而得以克服。这种拖动叫做齿带同步传动,用于小型机械和控制系统。齿带传动不打滑;它们实际上不需要维护保养;它
Synchronous operation is an ideal feature in power transmission. Originally it was obtained from the chain drive. In the transmission chain directly with the sprocket to prevent sliding, to ensure synchronous operation. Since the tension in the chain drive is lower than the tension in the torque drive, the chain drive greatly reduces the bearing load on the drive shaft. However, the chain drive also has its shortcomings. The chains make noise on uneven sprockets; the heavy components limit the speed of the rim; and often require proper lubrication. Many of these pitfalls affecting effective power transfer were first overcome with the development of a synchro-rubber belt about thirty years ago. This type of drag is called a toothed belt drive and is used in small machinery and control systems. Belt drive does not slip; they do not actually need maintenance; it