Friction clutch is the most widely used and oldest clutch, which basically consists of four parts: driving part, driven part, pressing mechanism and operating mechanism. Active and passive parts and pressing mechanism are the basic structures to ensure that the clutch is engaged and can transmit power, while the operating mechanism of the clutch is mainly a device to separate the clutch.
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The maximum torque that a friction clutch can transmit depends on the maximum static friction moment between friction surfaces, which is determined by the maximum pressing force between friction surfaces and the size and nature of friction surfaces. Therefore, for a clutch with a certain structure, the static friction torque is a constant value. Once the input torque reaches this value, the clutch will slip, thus limiting the torque on the transmission system and preventing overload.
In addition to reversing and transmitting torque, the friction clutch can also play the role of disconnecting the transmission key. Lathe often needs to change the spindle speed frequently. If the main motor stops and changes speed (changing speed will damage the rotating gear), frequent starting will damage the motor. The shaft can be cut off by using the separation position of the friction clutch. Me? After the transmission chain, when the main motor is running, the shaft? Two? After each shaft stops running, the speed can be changed. In addition, the friction clutch can also play the role of overload protection.
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