Vehicle Vibration Damper With Path-Limited Damping Mass
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Solution Overview
Problem
Conventional vibration dampers for motor vehicle parts, such as tailgates or roofs, face challenges in maintaining a long operating life and cost efficiency, often leading to overloading and damage of the spring device due to uncontrolled deflection of the damping mass, which can result in the loss of the damping mass and damage to vehicle parts.
Innovation Solution
Incorporation of an anti-loss and/or path limiting device, such as pin elements interacting with stop devices, to limit the deflection of the damping mass, preventing overloading of the spring device and ensuring the damping mass remains attached, while allowing for modular manufacturing and adjustable vibration frequency through the stiffness and geometry of the spring device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damping mass is allowed to deflect freely to damp vibrations effectively, then the vibration damping performance is improved, but the spring device may be overloaded and damaged
Solution Approach 1:
The anti-loss and path limiting device is pre-installed on the damping mass before operation. This preliminary action ensures that the deflection path is controlled from the outset, preventing the spring device from being overloaded while allowing sufficient travel for effective vibration damping.
Solution Approach 2:
The anti-loss and path limiting device acts as an intermediary between the damping mass and the spring device. It mediates the interaction by providing guided deflection paths and stopping positions, allowing the damping mass to move freely within limits while protecting the spring device from excessive loads.
2Reliability
If complex safeguard devices are added to limit deflection and prevent damage, then the reliability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The anti-loss and path limiting device combines multiple functions into a single integrated component: it limits deflection paths, provides stopping positions, and prevents the damping mass from detaching. This merging of functions reduces the number of separate safeguard devices needed, simplifying the overall structure while maintaining reliability.
Solution Approach 2:
The anti-loss and path limiting device serves multiple purposes simultaneously: it guides the damping mass movement, limits deflection to protect the spring device, and prevents complete detachment. This multi-functionality eliminates the need for separate complex safeguard mechanisms for each function.
3Duration of action of stationary object
If the spring device is designed with high stiffness to limit deflection, then the operating life is extended, but the vibration damping effectiveness is reduced
Solution Approach 1:
The deflection control function is segmented from the spring device and assigned to the anti-loss and path limiting device. This segmentation allows the spring device to be optimized for vibration damping with appropriate stiffness, while the path limiting device handles the deflection control, preventing overloading without compromising damping effectiveness.
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 anti-loss and/or path limiting device extends the operating life of the vibration damper, prevents damage and loss, and allows for cost-effective manufacturing by enabling separate production of the spring, damping mass, and retaining device, while effectively damping vibrations to improve driving comfort.
Implementation Method 1
a spring device (16) coupling the damping mass (14) capable of vibrating to the retaining device (12)
Implementation Method 2
the damping mass (14) has at least one anti-loss and/or path limiting device (18), interacting with the retaining device (12) to limit a deflection of the damping mass (14) with respect to the retaining device (12)
Implementation Method 3
Vibration dampers of the aforementioned kind are used for dampening vibrations of motor vehicle parts in order to decouple the disturbing vibrations from a passenger cabin and thus to improve driving comfort
Data Source
AI summary
A vibration damper for damping vibrations of a motor vehicle part including a retaining device attachable to the motor vehicle part, a damping mass, capable of vibrating with respect to the retaining device, and a spring device coupling the damping mass capable of vibrating to the retaining device. The damping mass may have at least one anti-loss device and/or path limiting device that may interact with the retaining device to limit a deflection of the damping mass with respect to the retaining device.