Pendulum Damping Device Limit Stop Segmentation
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Solution Overview
Problem
Existing pendulum damping devices in motor vehicle torque transmission systems suffer from noise issues due to pendulum impacts and difficulty in installing elastomeric limit stops, which can lead to reduced effectiveness and failure over time.
Innovation Solution
A pendulum damping device with a limit stop system featuring an insert and stop body design that allows for easier handling and installation, using a receptacle and stop body configuration that maintains stiffness and prevents pendulum contact, potentially automated with a robot, and utilizing elastomeric or plastic materials for the stop body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elastomeric limit stops are fastened at the ends of the flyweights, then the noise caused by impacts between the flyweights is reduced, but the limit stops are particularly difficult to handle and to install in the flyweights
Solution Approach 1:
The limit stop is divided into two separate components: an insert and a stop body. The insert is first installed in the receptacle of the flyweight, and then the stop body is inserted into the cavity formed by the insert. This segmentation allows each component to be handled and installed independently, significantly improving ease of installation compared to a single-piece elastomeric limit stop.
Solution Approach 2:
The insert acts as an intermediary component between the flyweight receptacle and the stop body. It provides a structured interface that facilitates the installation of the stop body while maintaining the necessary stiffness and damping properties. The insert's cavity structure guides and positions the stop body during installation.
2Object-affected harmful factors
If elastomeric limit stops are used to reduce impact noise, then noise is reduced, but positional retention of the limit stop over the entire service life is not ensured
Solution Approach 1:
By separating the limit stop into an insert and a stop body, each component can be optimized for its specific function. The insert provides precise positioning and retention features that engage with the flyweight receptacle, while the stop body provides the damping function. This segmentation ensures better positional retention throughout the service life.
Solution Approach 2:
The limit stop system combines different materials with complementary properties: the insert (which could be metallic or rigid plastic) provides structural integrity and precise positioning, while the stop body (elastomeric material) provides damping and noise reduction. This composite approach ensures both reliability and noise reduction.
3Object-affected harmful factors
If a single-piece elastomeric limit stop is used, then noise is reduced, but the installation process is complex and time-consuming
Solution Approach 1:
The limit stop is segmented into an insert and a stop body that can be prepared separately and assembled quickly. The insert is first installed in the receptacle, creating a ready-receive structure for the stop body. This pre-prepared structure enables rapid installation, potentially allowing for automated assembly processes.
Solution Approach 2:
The insert is installed in advance in the receptacle, creating a pre-prepared structure with a cavity ready to receive the stop body. This preliminary action simplifies the subsequent installation step and enables faster overall installation compared to installing a single-piece limit stop.
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 noise and improves the retention and longevity of the damping device by simplifying the installation process and ensuring precise positioning of the limit stops, enhancing the overall performance and durability of the damping mechanism.
Implementation Method 1
the stop body is made of elastomeric material
Implementation Method 2
these stops made of elastomeric material do allow a reduction in the noise caused by impacts between the flyweights
Data Source
AI summary
A pendulum damping device for a motor vehicle torque transmission device, having a support washer, a flyweight capable of being displaced with respect to the support washer in order to damp vibrations deriving from an engine of the vehicle, the flyweight exhibiting on a lateral terminal edge a receptacle receiving a limit stop. The limit stop comprises an insert intended to be fastened in the receptacle of the flyweight and delimiting a cavity having a bottom and a mouth opposite the bottom, and a stop body projecting outside the cavity through the mouth.The invention also relates to a torque transmission device utilizing a pendulum damping device of this kind.