Principle of Motorcycle Clutch

In principle, the clutch is a device located between the engine and the gearbox. Its main function is to transmit or cut off the power of the engine. The purpose of transmitting power is to make the motorcycle move forward; the purpose of cutting off the power is usually to facilitate the shifting, because if the power is not cut off, it is difficult to synchronize the driving gear and the passive gear in the transmission, and it is not easy to shift the gear (some technically advanced ones You can use the control of motorcycle speed and engine speed to achieve basic synchronization between the two, but it is generally not easy).

In addition to this main role, the clutch also has a less conspicuous role, that is, when the motorcycle suddenly encounters a large impact, it can produce a slip between the active friction plate and the passive friction plate, which relieves the external force to the engine to a certain extent. The impact, which can have a certain protective effect on the engine.

The most important issue when using a clutch is not to disengage it for a long time. Why is this so? Let us first look at the structure of the clutch. The main component in the clutch is the friction plate, which is divided into an active friction plate and a passive friction plate. The active friction plate is connected with the engine crankshaft through the gear; the passive friction plate is also connected with the input shaft of the gearbox through the gear. Generally, a clutch has multiple active friction plates and multiple passive friction plates. The two are concentric circles and are spaced apart (one active, one passive, one active, and one passive) together.

The clutch has three working states: the first one is the coupling state, that is, the active friction plate and the passive friction plate are combined under the action of the spring and the pressure plate, and the power from the engine is transmitted to the gearbox; the second state is separation State, that is, when we hold the clutch handle, the pressure on the active and passive friction plates is released, the active friction plate and the passive friction plate change from the combined state to the separated state, the active friction plate rotates with the engine, and the passive friction plate follows the transmission The input shaft rotates and the power transmission is cut off; the third state is a semi-combined state. In this state, the active friction plate and the passive friction plate are neither completely combined nor completely separated, and the power transmission is in a semi-half and half continuous status.

Among the above three states, the so-called separation state is just a theoretical description. In fact, because the gap between the active friction plate and the passive friction plate is very small, even in the completely separated state, you are next to each other Me, I'm next to you, there will be some friction. If it is in this state for a long time, it is easy to produce high temperature due to friction, and the clutch will be burned in serious cases. This is the main reason why the clutch cannot be left for a long time.

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