Detailed Analysis:

1. Product Positioning & Application

• Applicable Models: Widely used in commercial vehicles (e.g., heavy-duty trucks such as Sinotruk Howo, Shaanxi Auto Delong, FAW Jiefang).

• Function:

  • Power Transmission: When the clutch is engaged, the friction linings of the disc come into contact with the engine flywheel and pressure plate, transmitting engine torque to the transmission input shaft to drive the vehicle.

  • Cushioning & Vibration Damping: The torsional damping springs inside the disc (the multiple springs in the middle of the image) absorb engine torque fluctuations (e.g., shocks during shifting or starting), reducing driveline vibration and noise.

  • Disconnection: When the clutch pedal is depressed, the pressure plate releases, separating the clutch disc from the flywheel and cutting off power transmission, allowing gear changes or stopping the vehicle.

2. Appearance & Structural Features

• Material:

  • Friction Linings: Made of asbestos-based, semi-metallic, ceramic, or carbon fiber friction materials (semi-metallic or ceramic-based are common in modern commercial vehicles). They offer a high friction coefficient, wear resistance, and high-temperature resistance, ensuring reliable power transmission.

  • Disc Body: Typically made of high-strength steel (e.g., 45# steel) or alloy steel, processed through stamping and heat treatment to ensure rigidity and impact resistance.

  • Torsional Damping Springs: Usually made of alloy spring steel (e.g., 60Si2Mn), quenched and tempered, offering high elastic limit and fatigue resistance for frequent compression and rebound.

  • Spline Hub: The part that mates with the transmission input shaft, made of alloy steel and carburized and quenched for wear resistance and reliable spline connection.

• Structure:

  • Friction Linings: The outer ring consists of black friction material, riveted to the disc body, with a textured surface to increase friction.

  • Disc Body: The central metal disc with friction linings mounted on both sides. It features mounting holes (for rivets to secure the friction linings) and spring slots for the damping springs.

  • Torsional Damping Springs: Installed in slots around the disc body, arranged circumferentially to absorb torque fluctuations.

  • Spline Hub: The splined structure at the center of the disc, which mates with the splined bore of the transmission input shaft to transmit torque.

• Identification Label: The label on the clutch disc typically indicates the part number, production batch, and compatible vehicle model (e.g., "Dedicated for HOWO Heavy-Duty Truck"), facilitating aftermarket matching.