Torsional Oscillation Damping Device with Reinforced Interposition Piece
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Solution Overview
Problem
Conventional torsional oscillation damping devices in motor vehicle transmission systems face premature wear and noise issues due to axial shocks between pendulum bodies and supports, which are exacerbated by the fragility of axial pads subjected to strong forces.
Innovation Solution
A torsional oscillation damping device featuring a support with pendulum masses and linking members, incorporating interposition pieces made of damping materials like plastic or rubber, with reinforcement lugs that enhance resistance to shearing forces and prevent axial contact between pendulum masses and rolling members, thereby extending the service life and reducing shocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional axial pads are used between pendulum masses and support, then axial shocks are prevented, but the pads are subjected to strong forces that make them fragile and cause premature wear
Solution Approach 1:
The patent applies composite materials by combining metal fixing lugs with a separate reinforcement element (such as a steel ring or reinforcement plate) to create a hybrid structure. This composite construction allows the pad to withstand strong shearing forces from axial shocks while maintaining the damping properties of the original pad material, thereby resolving the contradiction between shock prevention and pad durability.
Solution Approach 2:
The pad is segmented into distinct functional parts: metal fixing lugs for attachment, a reinforcement element for structural strength, and the damping pad material for shock absorption. This segmentation allows each component to be optimized for its specific function, enabling the pad to resist both axial shocks and shearing forces without premature wear.
2Strength
If metal elements are used in the damping device, then structural strength is provided, but axial shocks generate undesired noises and cause premature wear
Solution Approach 1:
The invention introduces an interposition piece as an intermediary element between the metal pendulum masses and the metal support. This intermediate component acts as a mediator that prevents direct metal-to-metal contact during axial shocks, thereby eliminating noise generation and reducing wear while maintaining the overall structural strength of the device through its own reinforcement design.
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 axial shocks and noise, enhancing the durability and performance of the damping device by preventing contact between pendulum masses and supports, thus improving the filtering of torsional oscillations and extending the service life of the interposition pieces.
Implementation Method 1
The interposing piece is in particular made of a damping material, such as plastic or rubber
Data Source
AI summary
A device for damping torsional oscillations comprises a support rotationally displaceable around an axis. A pendulum body comprises first and second axially spaced movable masses. Each mass arranged on a side of the support. A member connects the first and second masses. A bearing interacts with a raceway defined by the support and at least one raceway defined by the pendulum body. An interposition part arranged to prevent contact in the axial direction between one of the masses and at least one of the rolling member and the support. The interposition part comprises an interposition region preventing occurrence of contact in the axial direction, and a region for fastening onto one of the masses or onto one of the rolling member and the support. The fastening region comprises at least two fastening tabs and a reinforcement connecting the tabs.