Double-Mass Vibration Absorber With Single-Bolt Frequency Tuning
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Solution Overview
Problem
Existing vibration absorbers face high production costs due to complex assembly processes and the need for multiple components, with limited adjustability of natural frequencies and vulnerability to component failure.
Innovation Solution
A vibration absorber design featuring a carrier plate with two sides and a single connecting bolt that secures two mass elements on both sides, allowing for reduced components and adjustable resonant frequency, with options for press-fit, screw, or latched connections, and the use of spring devices for damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single connecting bolt secures two mass elements on both sides of the carrier plate, then the number of components is reduced and production costs decrease, but the reliability requirement becomes more challenging to meet
Solution Approach 1:
The patent merges the function of securing two mass elements into a single connecting bolt, combining multiple fastening functions into one component. This reduces the total number of fastening elements from two (or more) to one, simplifying the overall device structure while maintaining the ability to secure both mass elements reliably through the carrier plate
Solution Approach 2:
The connecting bolt serves multiple functions simultaneously: it secures the first mass element, secures the second mass element, and provides a unified fastening solution for both sides of the carrier plate. This multi-functional design reduces component count while maintaining comprehensive securing capability
2Reliability
If pressed-in bolts are used as loss prevention devices, then component security is improved, but the holding plate structure becomes more complex and production costs increase
Solution Approach 1:
The patent combines the fastening function and loss prevention function into the same connecting bolt structure. The bolt itself is designed to be press-fit into the carrier plate, eliminating the need for separate pressed-in bolts or additional loss prevention components, thereby simplifying the overall structure while maintaining security
3Stability of the object's composition
If absorber masses are vulcanized onto the holding plate, then permanent fixation is achieved, but production costs increase due to vulcanization molds and the process becomes more complex
Solution Approach 1:
The patent replaces the chemical vulcanization process with a mechanical press-fit connection system. The connecting bolt is pressed into the carrier plate and mass elements, creating a secure mechanical fixation that eliminates the need for vulcanization molds and chemical bonding processes, thereby reducing production complexity and cost while maintaining permanent fixation
4Adaptability or versatility
If the natural frequency is adjusted via elastomer hardness, then frequency tuning is possible, but the adjustment range is limited and requires changing material properties
Solution Approach 1:
The patent enables frequency adjustment by changing geometric parameters (mass element mass, positioning) rather than material properties. The connecting bolt allows for easy repositioning and replacement of mass elements, providing a versatile means to tune the natural frequency across a wide range without requiring different elastomer formulations or hardness levels
Data Source
AI summary
A vibration absorber includes a carrier plate having two sides and a bore, a mass element provided on each of the two sides of the carrier plate to form a mass pair, and a connecting bolt. The connecting bolt projects through the bore and projects on both sides of the carrier plate into the mass elements to fix or connect the mass element on each side of the carrier plate on or to the carrier plate.