Phasing Member Stabilization in Torsion Damping
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Solution Overview
Problem
Existing torsion damping systems in motor vehicle transmission systems face instability due to the lack of effective stabilization of the phasing member, which affects the alignment and rotation between the engine and gearbox, leading to inefficient vibration filtration.
Innovation Solution
A torsion damping device with a central hub, elastic members, and a pendulum damper system, including a bearing that acts as both a centering and axial stop, allowing for misalignment compensation and phased deformation of elastic members, is introduced. This device is integrated into the transmission system to stabilize the rotation and improve vibration filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a phasing member is used to arrange elastic members in series, then the elastic members deform in phase with each other, but the phasing member has less stability since it is essentially centered by the elastic members
Solution Approach 1:
The patent introduces a bearing as an intermediary element between the phasing member and the central hub. This bearing provides external support and centering for the phasing member, transforming it from being solely centered by elastic members to being supported by a dedicated bearing structure. This intermediary bearing resolves the instability issue while maintaining the phasing function.
Solution Approach 2:
The patent divides the centering function into two separate components: the bearing handles the mechanical support and centering of the phasing member, while the elastic members focus on providing the damping force. This segmentation of functions allows each component to optimize its specific role, with the bearing ensuring stability and the elastic members ensuring proper deformation phasing.
2Adaptability or versatility
If the bearing serves as both centering and axial stop, then misalignment compensation is enabled, but the device complexity increases
Solution Approach 1:
The bearing is designed to perform multiple functions simultaneously: it centers the phasing member radially, provides axial positioning as a stop, and compensates for misalignments between the input shaft and gearbox. By making the bearing multi-functional, the patent avoids adding separate components for each function, thereby managing complexity while achieving versatility.
Solution Approach 2:
The patent merges the centering function and axial stopping function into a single bearing component. Instead of having separate centering mechanisms and axial stops, the bearing structure is designed to fulfill both roles, simplifying the overall device structure while maintaining the required adaptability for misalignment compensation.
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 proposed solution enhances the stability and alignment between the engine and gearbox, effectively filtering vibrations and ensuring smooth torque transmission, thereby improving the overall performance and efficiency of the motor vehicle transmission system.
Implementation Method 1
at least one group of elastic members mounted between the first element and the second element and acting against the rotation of the first element and of the second element relative to each other
Implementation Method 2
in order to filter the vibrations due to the acyclisms of the engine
Implementation Method 3
a pendulum damper comprising a pendulum support member adapted to move in rotation around the axis of rotation on which is movable at least one flyweight
Implementation Method 4
at least one flyweight, the pendulum support member being linked in rotation to the phasing member
Implementation Method 5
the device comprises a bearing mounted between the pendulum support and the central hub
Data Source
Figure 1
Figure 2
Figure 3a~4b
AI summary
The invention relates to a torsional damping device (4), comprising: - a first movable element (13,14) and a second movable element (15,16) movable in rotation about an axis X, coaxial, - a central hub coupled in rotation to the second element, - at least one group of elastic members (25,26) acting against the rotation of the first element and the second element with respect to each other, - a phasing member (32,33), formed by two parts (32,33) to arrange the elastic members of this group in series so that the elastic members of each group deform in phase with each other, and - a pendulum damper (48) linked in rotation to the phasing member, the phasing member being centered on the central hub by means of the pendulum damper.