Diaphragm spring clutch, its work can be divided into three processes: working, separating and engaging.
1. Work process. When the diaphragm spring is inserted between the clutch cover and the pressure plate, the pressure on the pressure plate formed by the pre-compression deformation makes the clutch's main and driven parts compact, that is, the clutch is in an engaged state. The engine power is transmitted to the driven plate through the flywheel, clutch cover and pressure plate which are integrated with the crankshaft, and then transmitted to the input shaft of the transmission through the driven plate spline sleeve. The working characteristic of this process is that the torque and speed transmitted by the main and driven parts of the clutch are the same, and there is no speed difference between the main and driven parts, and there is no slip.
2. The separation process. The driver steps on the clutch pedal, the pedal moves to the left, the push rod moves to the left, and the diaphragm spring separating plate is pushed to move to the left through the cylinder and the working cylinder. Affected by this, the diaphragm spring uses the supporting pin fixed on the clutch cover as a fulcrum to move the big end to the right, and at the same time pulls the pressure plate to move right by the action of the separating plate. Eventually, there is a gap between the driven plate, the flywheel and the pressure plate, the clutch is separated, and the clutch separation process ends.
The working characteristic of the clutch in the separation process is that the power and movement of the engine cannot be transmitted to the driven plate after separation. The active part is still synchronized with the engine speed, while the driven part is rapidly reduced.
3. The joining process. The driver releases the clutch pedal and the pedal returns to its original position under the action of the return spring, and at the same time drives the push rod and the release bearing to return. That is, the movement of the operating mechanism during the joining process is the reverse process of the separation process. When there is a reserved gap between the release bearing and the diaphragm spring release plate and the diaphragm spring re-presses the pressure plate on the driven plate, the engagement process ends and the clutch resumes its power transmission function.