Wire Rope Isolation Crate for Fragile Panel Transport
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Solution Overview
Problem
Traditional methods for transporting fragile objects, such as wooden crates with foam cushioning, often fail to adequately protect against damaging vibrations during transit, as they can amplify low-frequency vibrations, leading to potential damage to items like paintings on canvas.
Innovation Solution
A vibration-isolating system comprising a case with a platform suspended by wire rope isolators, crumple zones, and environmental buffers, which includes a container assembly with rigid panels and air gaps to absorb and dissipate vibrations, raising the natural frequency of the object and reducing excursions beyond 350 microns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional wooden crates with foam cushioning are used, then the structure provides basic protection and is simple to manufacture, but it amplifies low-frequency vibrations causing damage to fragile objects
Solution Approach 1:
The patent changes the physical parameters of the protective system by using wire rope isolators with specific tuning ratios (greater than or equal to 1.4) to alter the natural frequency of the system. This frequency tuning transforms the protective mechanism from passive foam cushioning to an actively tuned vibration isolation system that prevents resonance and vibration amplification.
Solution Approach 2:
The patent employs composite material structures including wire rope isolators combining metal wires with elastomeric elements, rigid panels with air gaps, and multiple layers of shock-absorbing materials (polycarbonate, polypropylene, expanded polystyrene). These composite structures provide both vibration isolation and shock protection while maintaining manufacturing feasibility.
2Reliability
If wire rope isolators with tuning ratio >= 1.4 are used, then vibration isolation effectiveness is improved, but the system complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the vibration protection function into multiple independent components: wire rope isolators for primary vibration isolation, rigid panels with air gaps for frequency tuning, crumple zones for shock absorption, and environmental buffers for additional damping. This segmentation allows each component to be optimized independently while maintaining overall system reliability.
Solution Approach 2:
The wire rope isolators serve multiple functions simultaneously: they provide vibration isolation through their tuned natural frequency, act as shock absorbers through their elastomeric elements, and maintain structural support for the platform. This multi-functionality reduces the need for separate components, thereby managing system complexity.
3Object-affected harmful factors
If rigid panels with air gaps are used to raise natural frequency, then vibration damage is reduced, but the device complexity and space requirements increase
Solution Approach 1:
The patent introduces air gaps as a dimensional feature between rigid panels and the flexible panel, creating three-dimensional protective chambers. These air gaps function as spring elements that raise the natural frequency of the system without requiring additional horizontal space, effectively using the vertical dimension to achieve vibration protection.
Solution Approach 2:
The air gaps between rigid panels and the flexible panel function as pneumatic springs, utilizing the compressibility of air to provide vibration isolation. This pneumatic mechanism raises the natural frequency of the system while occupying minimal space, as the air itself serves as the isolating medium without requiring solid structural elements.
4Reliability
If multiple shock-absorbing structures are implemented, then protection against impact is improved, but the weight and device complexity increase
Solution Approach 1:
The patent applies different shock-absorbing materials in specific locations within the crumple zone: polycarbonate for high-impact resistance in critical areas, polypropylene for moderate impact absorption, and expanded polystyrene for lightweight filler protection. This localized application of materials optimizes impact protection while minimizing overall weight.
Solution Approach 2:
The crumple zone incorporates sacrificial shock-absorbing structures designed to deform or fail in controlled ways during impact events. These disposable elements absorb impact energy through controlled destruction, protecting the valuable payload while the sacrificial components can be replaced if needed, reducing the need for overly robust permanent structures.
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 system effectively reduces the risk of damage from vibrations by isolating and damping harmful frequencies, preventing resonance and excessive movement of fragile objects during transit, thereby protecting items like paintings from cracking and deterioration.
Implementation Method 1
a platform suspended within the case by a plurality of wire rope isolators
Implementation Method 2
one or more vibration-damping footings... Each vibration-damping footing comprises... a damping system positioned between the first cushion and the second cushion
Implementation Method 3
a crumple zone beneath the platform and configured with one or more shock-absorbing structures (such as shock-absorbing structures that comprise polycarbonate, polypropylene, and/or expanded polystyrene)
Implementation Method 4
a container assembly with rigid panels and air gaps to absorb and dissipate vibrations
Data Source
AI summary
According to some embodiments, a vibration-isolating system comprises a case, one or more environmental buffers, a platform suspended within the case by a plurality of wire rope isolators, a crumple zone beneath the platform and configured with one or more shock-absorbing structures, and a container assembly configured on the platform. The container assembly is operable to protect a payload comprising a flexible panel. The container assembly comprises a back panel positioned behind the flexible panel and offset by a first substantially airtight compartment, a front panel positioned in front of the flexible panel and offset by a second substantially airtight compartment, and a stiffener panel positioned in front of the front panel and offset by a third substantially airtight compartment.