To reduce impact noise during gear shifts, the Jiangling pickup truck's clutch disc employs a multi-stage damping structure centered on spring friction. Through the synergistic action of elastic and damping elements, it effectively absorbs transmission system vibrations and suppresses noise propagation. This structure uses the driven disc assembly as a carrier, integrating key components such as friction plates, wave plates, damping springs, damping plates, and splined hubs to form a multi-layered buffer system. Among these, the friction plates, as components directly contacting the engine flywheel, have their surface material and clamping force design directly affecting frictional stability; the wave plates compensate for speed differences during clutch engagement through elastic deformation, reducing rigid impacts; damping springs and damping plates constitute the core damping unit, with the former providing elastic energy storage and the latter dissipating vibration energy through friction, working together to achieve vibration attenuation.
In its specific design, the Jiangling pickup truck's clutch disc uses multiple sets of damping springs with different stiffnesses, combined with window structures of varying sizes. When the transmission system generates torsional vibrations, springs of different specifications sequentially enter their working state: initial vibrations are absorbed by springs with lower stiffness, and as the vibration amplitude increases, higher stiffness springs gradually intervene, creating a variable stiffness characteristic. This design prevents resonance in the transmission system at specific speeds and reduces the transmission of high-frequency vibration noise to the cabin. Furthermore, the dimensional differences in the window structure stagger the spring compression timing, further extending the effective working range of the damping system and ensuring continuous dissipation of vibration energy during gear shifts.
The damping plate's function is to dissipate vibration energy through friction. It is typically made of a high-friction coefficient composite material, forming a "spring-damping" dual-element damping system in conjunction with the damping spring. When the clutch engages or disengages, sliding friction occurs between the damping plate and adjacent metal components, converting vibration kinetic energy into heat energy, thereby suppressing noise generation. Simultaneously, the nonlinear friction characteristics of the damping plate can adapt to vibration frequencies under different operating conditions, avoiding the attenuation of damping effect caused by constant damping force.
The splined hub, as a key component connecting the gearbox input shaft, directly affects the damping effect. The splined hub of the Jiangling pickup truck clutch disc uses precision machining to ensure that the clearance with the input shaft is controlled within a reasonable range. Excessive clearance reduces vibration transmission efficiency but may cause abnormal noises; insufficient clearance increases frictional resistance, affecting shifting smoothness. By optimizing the tooth profile parameters and surface roughness of the splined hub, this structure reduces impact noise caused by clearance while ensuring transmission efficiency.
Furthermore, the Jiangling pickup truck's clutch disc damping structure also considers thermal management and durability. Under frequent shifting or heavy-load conditions, the clutch disc generates a significant amount of heat; poor heat dissipation can lead to a decline in the performance of the damping components. Therefore, this structure improves heat conduction efficiency through optimized material ratios and heat dissipation channel design, ensuring the damping system maintains stable performance even in high-temperature environments. Simultaneously, key components such as damping springs and damping plates utilize wear-resistant materials, extending the service life of the damping structure and reducing maintenance costs.
From actual driving experience, the Jiangling pickup truck's clutch disc damping structure significantly reduces the impact and noise levels during gear shifts. During low-speed gear shifts, the multi-stage damping system effectively filters engine speed fluctuations, resulting in smoother gear changes. During high-speed shifts, the variable stiffness characteristic suppresses transmission system resonance, preventing sudden noise increases. This design not only improves driving comfort but also reduces fatigue damage to components caused by vibration, enhancing overall vehicle reliability.
The Jiangling pickup truck's clutch disc utilizes a spring-friction multi-stage damping structure, variable stiffness spring design, damping plate friction energy dissipation, precise spline hub fit, and optimized thermal management to construct a highly efficient vibration and noise control system. This structure significantly reduces shift shock and noise while ensuring transmission efficiency, providing drivers with a smoother and quieter driving experience.
