Elastomer-Sprung Vibration Damper With External Spring Routing
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Solution Overview
Problem
Conventional vibration absorbers for motor vehicle parts are expensive to manufacture, require precise preload, and occupy significant space due to their complex design and the need for additional components like pin elements, which complicates assembly and increases the risk of overloading elastomer springs.
Innovation Solution
A vibration absorber design featuring a holding device with receiving means and an absorber mass directly connected via elastomer springs, where the absorber mass acts as a deflection limiting device, eliminating the need for pin elements and allowing for a more compact and modular structure with adjustable oscillation frequency through elastomer spring hardness and geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pin element is used to connect the absorber mass to the holding device, then the vibration absorber can be assembled, but the device complexity increases and manufacturing cost increases
Solution Approach 1:
The pin element is extracted and removed from the system. The absorber mass is connected directly to the holding device without requiring a separate pin element, thereby reducing the number of components and simplifying the overall device structure while maintaining the vibration damping function
Solution Approach 2:
The connection function previously performed by the pin element is merged into the direct connection between the absorber mass and the holding device. The absorber mass itself serves as the connecting element, eliminating the need for a separate pin component and reducing assembly complexity
2Volume of moving object
If the elastomer spring connecting section is arranged inside the receiving means, then the structure is compact, but the gimbal deflection increases and impact forces increase
Solution Approach 1:
The elastomer spring connecting section is moved from an internal arrangement within the receiving means to an external arrangement on the outside. This spatial reconfiguration allows the connecting section to extend outward, providing better gimbal behavior and reducing impact forces while still maintaining a compact overall structure through optimized positioning
3Length of moving object
If the absorber mass is directly mounted on the holding device without a pin element, then the longitudinal length is reduced, but the deflection limiting function must be provided by the absorber mass itself
Solution Approach 1:
The absorber mass is designed to serve multiple functions: it acts as the oscillating mass for vibration damping, serves as the connecting element between the holding device and elastomer springs, and provides deflection limiting functionality. This multi-functional design eliminates the need for separate pin elements and stop devices, reducing the longitudinal length while maintaining all necessary functions
Solution Approach 2:
The absorber mass itself provides the deflection limiting function that would otherwise require separate components. By designing the absorber mass with appropriate geometry and mounting features, it automatically limits its own deflection relative to the holding device, eliminating the need for additional stop devices or pin elements
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
This design effectively dampens vibrations, reduces manufacturing costs, and improves gimbal behavior while ensuring the durability of elastomer springs by limiting deflection and preventing overloading, thus enhancing driving comfort and reducing installation space requirements.
Implementation Method 1
at least two elastomer springs (8), the elastomer springs oscillatingly coupling the absorber mass (6) to the receiving means (5)
Implementation Method 2
The respective connecting section (12) of the elastomer spring (8) is arranged on the outside with respect to the respective receiving means (5). This also improves the gimbal behavior.
Data Source
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AI summary
A vibration damper for damping vibrations of a motor vehicle part, which is penetrated by a transverse median plane (Q), is proposed, comprising a holding device (4) attachable to the motor vehicle part, which has at least two receiving means (5) which each have an inner side (40) facing the transverse median plane (Q) and an outer side (42) facing away from the transverse median plane (Q), a damper mass (6) which is centrally penetrated by a longitudinal axis (A), and at least two elastomer springs (8), wherein the elastomer springs (8) couple the damper mass (6) to the receiving means (5) in a way that allows vibration, wherein at least one of the elastomer springs (8) has a connecting section (12) between the damper mass (6) and the respective receiving means (5), which runs at least predominantly on the outside with respect to the respective receiving means (5).