What role does the diaphragm of a diaphragm spring clutch play?
2 Answers
The diaphragm spring itself serves both as the pressure spring and the release lever, reducing the number of parts and decreasing weight. Here is more information about the clutch: 1. Structure: The friction clutch is the most widely used type of clutch. Its structure typically consists of four parts: the driving part, the driven part, the pressure mechanism, and the operating mechanism. The types of friction clutches are classified based on the form of the pressure spring into diaphragm spring clutches and multi-spring clutches. Among them, the diaphragm spring in a diaphragm spring clutch serves both as the pressure spring and the release lever. 2. Working principle: It is generally divided into the engaged state and the disengaged state of the clutch. The flywheel is fixed to the crankshaft, and the pressure plate is fixed to the flywheel, with the clutch disc sandwiched in between. Under normal circumstances, the clutch disc is tightly pressed by the pressure plate, and as long as the engine is running, power is continuously transmitted to the transmission (in neutral). Then, when the clutch pedal is pressed to engage a gear, the pressure plate separates, cutting off the power output.
When I was repairing the car, I realized how crucial the diaphragm is in the clutch. It acts like a large disc spring—when you press the clutch pedal, the diaphragm flattens to release pressure, separating the friction disc and cutting off engine power. When you release the pedal, the diaphragm springs back to clamp the discs together, re-engaging the power. This design is much simpler than the old multiple small springs, making operation easier and more durable, even for women drivers. The benefit is that the pressure is evenly distributed, resulting in smoother gear shifts without jerking. However, the diaphragm is prone to fatigue. Frequent half-clutching in traffic can cause it to overheat and deform, leading to clutch slippage or shuddering. During maintenance, it's important to check the clutch fluid and the diaphragm for cracks. Historically, this design replaced the coil spring clutch, making manual transmission cars more user-friendly. Today, high-strength steel materials extend its lifespan, but future electric vehicles may not need it. Understanding this helps me drive more carefully, avoiding prolonged half-clutching to maintain the clutch.
