Centrifugal Pendulum Asymmetrical Recess Fixation
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Solution Overview
Problem
Existing centrifugal pendulum devices face issues with undesired deformation and lack of fixation under increased centrifugal force, which affects the unimpeded displacement of pendulum masses and overall functionality.
Innovation Solution
The centrifugal pendulum device features asymmetrical recesses on flange sections for secure fixation of a stop damper device, using spacer bolts for riveting and spherical rollers for pendulum mass displacement, ensuring dimensional stability and unimpaired functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stop damper device is fixed on the pendulum mass carrier part using conventional symmetric fixation methods, then the device structure is simple, but the stop damper device deforms under increased centrifugal force and fixation is compromised
Solution Approach 1:
The patent employs asymmetrical recesses on the flange sections of the pendulum mass carrier part to positively fix the stop damper device. This asymmetrical design creates a non-reversible fixation geometry that prevents the stop damper device from rotating or detaching under centrifugal force, thereby improving fixation reliability while maintaining structural simplicity
Solution Approach 2:
The asymmetrical recesses are pre-formed on the flange sections during manufacturing, preparing the fixation structure in advance. This preliminary action ensures that when the stop damper device is installed, it is automatically positioned and secured in the correct orientation, preventing deformation and ensuring reliable fixation under operational centrifugal forces
2Reliability
If the stop damper device is securely fixed to prevent deformation, then fixation reliability improves, but the displacement capability of pendulum masses may be restricted
Solution Approach 1:
The fixation system is segmented into distinct functional zones: the asymmetrical recesses provide secure fixation for the stop damper device, while the pendulum masses remain independently movable within their designated tracks. This segmentation allows the stop damper to be firmly fixed without interfering with the displacement capability of the pendulum masses
Solution Approach 2:
The fixation features (asymmetrical recesses) are locally applied only to the stop damper device mounting locations on the flange sections, while the pendulum mass carrier tracks maintain their smooth, unobstructed surfaces. This localized fixation approach ensures secure mounting where needed without restricting pendulum mass movement in their operational zones
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
Prevents deformation and ensures secure fixation and unimpeded displacement of pendulum masses under centrifugal force, maintaining the device's functionality and effectiveness in torsional vibration damping.
Implementation Method 1
at least one pendulum mass arranged on the pendulum mass carrier part between the first flange section and the second flange section, arranged to be displaceable along a pendulum track under the action of centrifugal force
Implementation Method 2
a stop damper device with at least one stop section for the at least one pendulum mass
Data Source
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AI summary
The invention relates to a centrifugal pendulum device (100), in particular for a powertrain of an internal combustion engine-driven motor vehicle. The centrifugal pendulum device (100) has a rotational axis; a pendulum mass support part (102) which can be rotated about the rotational axis and which comprises a first flange portion and a second flange portion that is axially distanced from the first flange portion and is arranged parallel to the first flange portion; at least one pendulum mass (104) which is arranged on the pendulum mass support part (102) between the first flange portion and the second flange portion and which is arranged in a movable manner along a pendulum path under the effect of a centrifugal force; and a stop damper device (106) comprising at least one stop portion for the at least one pendulum mass (104) and at least one fixing portion for fixing the stop damper device (106) on the pendulum mass support part (102). The first flange portion and the second flange portion each have asymmetrical recesses in order to fix the stop damper device (106) in order to improve the structure and/or function of the centrifugal pendulum device (100).