What is a car driven disc assembly
The automotive driven disc assembly is an important component of the clutch, mainly consisting of core parts such as friction plates, driven plates (or torsional shock absorbers), and driven disc hubs. Its function is to transfer the engine's torque to the transmission through friction, and at the same time, it serves to buffer the vibration and shock of the transmission system, completing the "disengagement" and "engagement" actions of the clutch.
Core components
Youdaoplaceholder0 Friction plate : It directly contacts the flywheel and the pressure plate, transmitting power through friction and is a key component for power conversion.
Youdaoplaceholder0 torsional shock absorber : Located between the friction plate and the driven plate, it absorbs the torsional vibration of the transmission system through elastic elements, enhancing ride smoothness.
Youdaoplaceholder0 driven hub : connects the friction plate with the input shaft of the transmission to achieve the final transmission of torque.
Functional features
The driven disc assembly achieves power disconnection and engagement through the wear of the friction plates, playing a buffering role during starting, gear shifting and other working conditions to prevent the transmission system from overloading or being impacted. Its structural forms include different designs such as integral elastic driven discs (where the friction plates are directly riveted onto the steel plates).
The automotive driven disc assembly is the core component of the clutch and mainly undertakes the following functions:
Power transmission
The engine power is smoothly transmitted to the transmission through friction plates to ensure the normal operation of the power system.
Buffer vibration
The built-in torsional shock absorber can absorb the vibration and shock of the transmission system, reduce the impact of the periodic torque fluctuation of the engine on the transmission system, and improve the ride smoothness.
The automotive driven disc assembly mainly consists of the following three parts:
Youdaoplaceholder0 Friction plate : It comes into contact with the flywheel and the pressure plate and transmits power through friction.
Youdaoplaceholder0 driven disc body (or driven plate) : As a metal base, it supports the friction plate and connects to the input shaft of the transmission.
Youdaoplaceholder0 torsional shock absorber : Absorbs the torsional vibration caused by the periodic impact of the engine and inhibits the resonance of the transmission system.
Some models may also include structures such as driven hubs or shock-absorbing springs , depending on the vehicle configuration.
Separation and joining control
When starting or shifting gears, the driven disc and the flywheel are temporarily separated by the separation bearing to reduce the impact of gear shifting. When engaging, gradually transfer power to ensure a smooth start of the vehicle.
Protect the transmission system
When the transmitted torque exceeds the limit that the friction plate can bear, it will automatically slip to prevent the transmission system from being overloaded and damaged.
Faults in the clutch driven disc assembly of a car can lead to problems such as shaky starting, incomplete disengagement, and difficulty in gear shifting. The following methods should be used for inspection:
Inspection method
Youdaoplaceholder0 friction plate wear detection
Use a vernier caliper to measure the depth of the rivet head. If it is less than 0.3mm, the friction plate needs to be replaced.
Youdaoplaceholder0 deformation detection
The wobble of the outer edge of the driven disc is measured by a dial indicator. If the end face circular runout exceeds 0.4mm, correction or replacement of the assembly is required.
Youdaoplaceholder0 connection status check
When the rivets are found to be loose or broken by knocking, the assembly needs to be replaced.
Youdaoplaceholder0 spline gap measurement
Install the driven disc on the input shaft of the transmission and manually rotate it. If there is no significant looseness and the tooth side clearance exceeds 0.16mm, the hub or input shaft needs to be replaced.
Fault phenomenon
Youdaoplaceholder0 Starting tremble : Uneven power transmission caused by wear or deformation of the friction plates.
Youdaoplaceholder0 Incomplete separation : Loose rivets or excessive spline clearance cause the clutch to fail to disengage completely.
Youdaoplaceholder0 Difficulty in shifting : Deformation or wear causes abnormal fit of the gear set.
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