Working principle of clutch pressure plate
2025-07-23
Power transmission process
Engaged state: When the engine is running, the diaphragm spring elastically deforms with the support ring as the fulcrum. Its outer end applies pressure to the pressure plate, causing the pressure plate and clutch disc to be tightly engaged, and power is transmitted to the gearbox through friction.
Disengaged state: When the clutch pedal is depressed, the release bearing pushes the inner end of the diaphragm spring forward. The diaphragm spring further deforms with the support ring as the fulcrum, and its outer end pulls the pressure plate backward through the release hook, interrupting power transmission.
Automatic adjustment mechanism
The diaphragm spring clutch has an automatic pressure adjustment characteristic: when the friction plate wears thin, the spring elongates, but the clamping force remains almost unchanged, ensuring stability of power transmission. Furthermore, the clamping force of the diaphragm spring is independent of rotational speed and remains stable even at high speeds.
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