Captive Vibration Damper Assembly With Through-Spring Mass
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Solution Overview
Problem
Prior-art vibration dampers are complex, require multiple assembly steps, and can have springs that snap, leading to safety issues due to a freely moving damper mass.
Innovation Solution
A vibration damper design featuring a base portion with brackets holding spring portions that pass through continuous openings in the damper mass, allowing for press-fitting and secure assembly, with a pincer-like bracket and a permanently elastic surface layer to prevent knocking noises and ensure the damper mass remains captive even if springs snap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If springs are used to hold the damper mass in prior-art vibration dampers, then the damper mass can be suspended and vibrations can be damped, but the springs can snap leading to safety issues and the assembly requires multiple complex steps
Solution Approach 1:
The patent extracts the spring from the critical load-bearing function and replaces it with a rigid rod that passes through the damper mass. The spring is retained only for its damping function, eliminating the risk of spring failure causing safety issues while simplifying the overall assembly structure.
Solution Approach 2:
The patent segments the functional requirements by separating the suspension function (handled by the rigid rod) from the damping function (handled by the spring). This segmentation allows each component to be optimized independently, improving reliability while reducing assembly complexity.
2Reliability
If multiple assembly steps are used in prior-art vibration dampers, then proper assembly and secure connection can be achieved, but the assembly process becomes complex and costly
Solution Approach 1:
The patent merges multiple assembly steps into a single integrated operation. The rod passes through both the base portion and damper mass in one continuous action, and the spring is attached to the rod in the same assembly sequence, eliminating the need for separate assembly steps while maintaining secure connections.
Solution Approach 2:
The rod is designed with features that enable preliminary positioning and alignment before final securing. The rod passes through pre-defined openings in both the base portion and damper mass, allowing for easy alignment and insertion in a single assembly operation without requiring complex positioning steps.
3Ease of operation
If springs are used to hold the damper mass, then vibration damping can be achieved, but the damper mass can move freely and become a danger if the springs fail
Solution Approach 1:
The patent extracts the critical load-bearing function from the spring and assigns it to a rigid rod. The spring is retained only for its damping function, eliminating the risk of spring failure causing safety issues while maintaining the vibration damping capability.
Solution Approach 2:
The rigid rod acts as an intermediary between the base portion and the damper mass, providing a secure mechanical connection that prevents the damper mass from moving freely. The spring then acts as a secondary element that provides damping while the rod ensures safety by maintaining captive positioning.
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 design simplifies assembly, reduces the risk of safety hazards, and effectively mitigates vibrations across different frequency ranges while maintaining a secure connection to the vibration source.
Implementation Method 1
a spring portion (14) comprising two ends (16a, 16b), which is held on the base portion (12) via at least one bracket (18)... the damper mass (20) can oscillate freely, damped by the spring portion (14), in order to absorb vibration energy
Implementation Method 2
the damper mass (20) can oscillate freely, damped by the spring portion (14), in order to absorb vibration energy and therefore mitigate disruptive vibrations
Implementation Method 3
at least one fastening geometry (24a, 24b) which penetrates the damper mass (20) without contacting it and which is preferably at least partially provided with a permanently elastic surface layer (28a). This enables a hard contact, which could cause an unpleasant knocking noise, to be avoided due to the permanently elastic surface layer (28a)
Data Source
AI summary
A vibration damper is disclosed which comprises a base portion for fixing to a vibration source. At least one spring portion is provided which is held on the base portion via at least one bracket. A damper mass is provided for absorbing vibration energy from the vibration source, and which has at least one continuous opening through which the spring portion extends.