在许多邮政机械设备中,我们都可以看到一对对大大小小的带牙齿的轮子——齿轮,互相啮合着转动,用来传递运动和动力。这种传动形式,叫做齿轮传动。远在几千年前,我国劳动人民已在水车、水轮机等机械中采用了齿轮传动。由于齿轮传动准确可靠,传动平稳,传递的速度和功率范围较广,效率高,而且结 In many postal machinery, we can see a pair of large and small, teeth-laden wheels - gears that mesh with each other to transmit movement and power. This form of transmission, called gear transmission. As far as a few thousand years ago, our working people had already adopted gear transmission in waterwheels, hydraulic turbines and other machinery. Because the gear transmission is accurate and reliable, the transmission is stable, the transmission speed and power range is wider, the efficiency is high, and the knot