Dry Double Clutch Backlash Compensation and Axial Damping
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Solution Overview
Problem
Dry double clutch systems experience backlash and durability issues due to spline coupling between the damper flywheel and set double clutch, leading to noise, vibration, and reduced damping performance, which complicates assembly and affects vehicle comfort and longevity.
Innovation Solution
Incorporating a cover and washer system with resilient members, such as coil springs and ring washers, to compensate for backlash and enhance axial damping, while using a snap ring and resilient washer to support the first hub and reduce impact on the stopper ring during assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spline coupling is used between the damper flywheel and set double clutch, then power transmission is enabled, but backlash is generated causing noise and reduced damping performance
Solution Approach 1:
A connector is introduced as an intermediary component between the damper flywheel and set double clutch. The connector includes a drive plate coupled to the damper flywheel and a connection plate coupled to the set double clutch, with resilient members positioned between them to eliminate backlash while enabling power transmission
Solution Approach 2:
Resilient members (springs and dampers) are pre-installed in the connector to provide beforehand cushioning against backlash. These members are positioned to compensate for clearance between mating spline gears before harmful impacts occur, reducing noise and maintaining damping performance
2Stability of the object's composition
If a stopper ring is used to support the first hub, then axial movement is constrained, but durability is reduced due to direct contact and repeated impact during assembly
Solution Approach 1:
A resilient washer is introduced as an intermediary between the stopper ring and the first hub. This resilient member acts as a mediator that absorbs impact during assembly and operation, preventing direct contact between the stopper ring and hub while maintaining axial position stability
Solution Approach 2:
The resilient washer provides beforehand cushioning by being pre-installed in the assembly path between the stopper ring and first hub. It absorbs repeated impact forces during assembly operations and normal operation, preventing durability degradation of the stopper ring while maintaining the required axial constraint
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces backlash and noise, improves durability, and simplifies assembly by absorbing vibrations and axial loads, thereby enhancing the overall performance and reliability of the dry double clutch system.
Implementation Method 1
a first resilient member which is mounted on the connector to resiliently press the cover in the circumferential direction of the connector
Implementation Method 2
The solution effectively reduces backlash and noise, improves durability, and simplifies assembly by absorbing vibrations and axial loads
Implementation Method 3
using a snap ring and resilient washer to support the first hub and reduce impact on the stopper ring during assembly and operation
Data Source
AI summary
The present invention relates to a dry double clutch. A damper flywheel (300) comprises: a connector (600) coupled to a drive plate (320) of the damper flywheel (300); a cover (700) compensating for backlash between the connecting plate (400) and the connector (600); and a first resilient member (616) resiliently pressing the cover (700) in the circumferential direction of the connector (600). A first clutch disk (250) of the set double clutch (200) is characterized by having an assembled structure consisting of: a stopper ring (271) enclosing a boundary portion (256) between the first clutch disk (250) and a first hub (255); a retainer ring (273) coupled opposite the stopper ring (271) and having the first clutch disk (250) interposed therebetween, and enclosing the boundary portion (256); and a resilient washer (275) resiliently supporting the first hub (255). Accordingly, a cover can be mounted on the connector, which transmits power from the damper flywheel, which is connected to the engine, to the set double clutch connected to the transmission so as to compensate for backlash in the connector, and vibrations in an axial direction transmitted from the first hub to the stopper ring during shifting can be absorbed by the stopper ring and the resilient washer interposed between and a first drive plate and the first hub, in order to prevent loss of durability of the stopper ring.