Pendular Flyweight Torsion Damping Device with Axial Support Plate
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Solution Overview
Problem
Existing torsion damping devices in motor vehicle temporary coupling systems face instability due to pendulum weights not being stably held in a radial plane, leading to interference friction, degraded filtering efficiency, and increased risk of damage to guide pins and mounting clearances, along with complex assembly challenges.
Innovation Solution
The pendulum weights are interposed axially between a first phasing washer and a second radial support plate, with guide pins housed in an orifice of the support plate, and abutment faces on the guide pins limit axial displacements, ensuring stable positioning and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pendulum weights are mounted on a phasing washer without additional support, then the device complexity is reduced, but the stability of the pendulum weights in the radial plane deteriorates
Solution Approach 1:
The support structure is segmented into multiple functional elements: the phasing washer provides rotational freedom and positioning, while the guide pins provide radial plane stability. This segmentation allows each element to perform its specific function without compromising the other, resolving the contradiction between simplicity and stability.
Solution Approach 2:
Guide pins are introduced as intermediary elements between the pendulum weights and the phasing washer. These pins mediate the interaction by providing stable support while allowing the necessary rotational movement, thus maintaining stability without significantly increasing overall device complexity.
2Ease of manufacture
If pendulum weights are not stably held in a radial plane, then the assembly process is simpler, but interference friction increases and filtering efficiency degrades
Solution Approach 1:
The guide pins are designed to allow dynamic movement of pendulum weights in the radial plane while maintaining stable support. This dynamic capability ensures that the weights can oscillate freely for effective filtering while preventing unwanted lateral tilting that would cause friction and reduce efficiency.
3Ease of operation
If pendulum weights are mounted without stable support, then the device is easier to assemble, but the risk of damage to guide pins and mounting clearances increases
Solution Approach 1:
The guide pins are designed with appropriate clearance and positioning features that prevent excessive forces from being transmitted to the mounting clearances. This beforehand cushioning approach protects the mounting structures from damage while maintaining ease of assembly, as the protective features are built into the design rather than requiring complex assembly procedures.
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
This configuration stabilizes the pendulum weights, enhances damping efficiency, reduces the risk of damage, and simplifies the assembly process by maintaining constant axial gaps and guiding the elastic members, thereby improving the overall performance and reliability of the damping device.
Implementation Method 1
the orifice of the pendulum weight has a radially inner edge along which the guide pin is capable of rolling
Implementation Method 2
under the effect of centrifugal forces, the frequency of oscillation of each of the pendular masses is proportional to the speed of rotation of the motor shaft
Implementation Method 3
at least two pendulum weights which are mounted oscillating in a radial plane on the first phasing washer
Implementation Method 4
first damping means by elastic members, and second means damping by pendular weights
Data Source
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AI summary
The invention relates to a device (10) for damping torsion in a motor vehicle temporary coupling system, the device (10) being equipped with: - first damping means which comprise at least two circumferentially- acting elastic members and a radial phase washer (38, 38A) for phasing the elastic members; - and second damping means which comprise a pendular flyweight (54) mounted such that it can oscillate on the first phase washer (38, 38A) via an axial guide pin (58); characterized in that the pendular flyweight (54) is interposed axially between the first phase washer (38, 38A) and a second radial support plate (38B, 38D), which is fixed with respect to the phase washer (38, 38A).