Plastic Pendulum Damping Device for Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pendular damping devices in motor vehicle transmission systems experience desynchronization issues during engine start and stop, leading to undesirable vibrations and noises due to radial falls of pendular bodies, which existing solutions fail to adequately address.
Innovation Solution
A pendular damping device with a noise attenuation system made of plastic material, arranged axially on either side of the support, clamping the support to limit vibrations and featuring a connection mechanism between separate parts or a molded part, which acts as a filter for frequencies between 1000 Hz and 3000 Hz, and includes rolling members guiding the movement of pendular bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a pendular damping device uses conventional metal damping members, then the structure provides adequate support, but vibrations and noises occur during radial impact of pendular bodies
Solution Approach 1:
The patent changes the material parameter from metal to plastic for the damping members. This material substitution allows the damping members to deform elastically during impact, absorbing vibration energy and reducing noise while maintaining adequate support function. The plastic material's inherent damping properties effectively attenuate the harmful vibrations and noises without compromising reliability.
Solution Approach 2:
The patent employs plastic material which can be considered a composite or engineered material with specific damping characteristics. This material choice combines structural support capability with vibration attenuation properties, creating a multi-functional damping member that addresses both support and noise reduction requirements simultaneously.
2Ease of manufacture
If the attenuation system uses separate parts, then manufacturing and assembly are simplified, but the connection mechanism may introduce additional complexity
Solution Approach 1:
The attenuation system is divided into separate damping members that can be manufactured independently and then assembled onto the support. This segmentation allows for simplified manufacturing of individual components and easier assembly, while the connection mechanism between separate parts introduces minimal complexity compared to the benefits gained in manufacturing and assembly processes.
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
Effectively reduces vibrations and noises by clamping the support during impact, ensuring the radial overlap does not affect the movement of pendular bodies, thereby improving the filtering performance and reducing unwanted noise and vibration frequencies.
Implementation Method 1
The plastic is particularly suitable for making it possible to limit the vibrations of the support following an impact of the pendular body on the latter
Implementation Method 2
the movement relative to the support of each pendular body being guided by two rolling members cooperating on the one hand with rolling tracks secured to the support
Data Source
Figure 1~4
Figure 5~9
Figure 10~13
AI summary
Pendulum damping device (1), comprising; - a support (2) movable about an axis of rotation (X), - at least one pendulum body (3), movable relative to the support (2) and, - a noise attenuation system (30) occurring during a shock of the pendulum body (3) on the support (2), disposed axially on each side of the support and axially clamping this support (2).