Fiber Rope Load-Bearing Shackle for Lightweight Flexible Lifting
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Solution Overview
Problem
Conventional load bearing shackles are heavy, rigid, and prone to corrosion, making them difficult to handle and use in various situations, especially where space is limited, and they do not offer the necessary flexibility or corrosion resistance.
Innovation Solution
A lightweight load bearing shackle with a fiber rope bow made from synthetic fibers like polypropylene, nylon, or polyester, which is flexible and corrosion-resistant, featuring a U-shaped arrangement with eyelets and connection pins for secure attachment, and optionally reinforced with steel inserts for added durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional metal shackles are used, then strength and durability are ensured, but weight increases and handling becomes difficult
Solution Approach 1:
The shackle combines steel components (bow, connection pin) with synthetic rope cable to create a composite structure. The steel parts provide necessary strength and durability for load-bearing functions, while the synthetic rope cable significantly reduces weight compared to traditional all-metal construction, making the shackle easier to handle while maintaining structural integrity
Solution Approach 2:
Different parts of the shackle use different materials optimized for their specific functions: steel is used where high strength is required (bow, connection pin, eyelets) while synthetic rope is used for the cable portion where weight reduction is prioritized. This localized material selection resolves the contradiction between overall strength and overall weight
2Stability of the object's composition
If traditional metal shackles are used, then structural rigidity is maintained, but flexibility and adaptability to confined spaces are reduced
Solution Approach 1:
The shackle design applies rigidity locally where structural stability is needed (steel bow and connection pin maintain fixed geometry for load-bearing) while allowing flexibility in the rope cable portion that connects to the load, enabling the shackle to adapt to confined spaces and various configurations while maintaining compositional stability in critical components
Solution Approach 2:
The shackle transitions from a completely rigid metal structure to a dynamic hybrid structure where the synthetic rope cable can flex and adapt its shape while the steel components maintain their structural integrity. This dynamic characteristic allows the shackle to conform to confined spaces and irregular geometries while preserving the rigidity needed for safe load-bearing operations
3Strength
If traditional metal shackles are used, then structural strength is ensured, but corrosion resistance is reduced
Solution Approach 1:
The shackle uses a composite construction combining steel components with synthetic rope cable. The synthetic rope portion provides inherent corrosion resistance as it does not rust like metal, while the steel components are minimized and can be protected with coatings or galvanization, significantly reducing overall corrosion susceptibility while maintaining necessary structural strength
Solution Approach 2:
The synthetic rope cable portion acts as a replaceable component that is inherently resistant to corrosion and degradation from environmental factors. While the steel components may eventually require maintenance, the synthetic portions provide long-term corrosion resistance without needing protective coatings, reducing overall maintenance requirements
Data Source
AI summary
A lightweight and flexible load bearing shackle that is configurable in operation. The shackle includes a bow made of a plurality of loops of synthetic fiber rope (e.g., polypropylene, nylon, polyester, polyethylene, Aramid, acrylic, mixtures of several fibers, co-polymer fibers, straight, braided, twisted). The loops of fiber rope may be contained within a sheathing configured as a single loop. The sheathing is secured together to form a receptacle (opening) in each leg of the bow that is reinforced with an eyelet. The eyelets may be split eyelets that include a first/second side mounted to a first/second side of the receptacle that are then secured together over the receptacle. A connection pin may be secured between the eyelets. The shackle may include a spacing mechanism (e.g., casing that connection pin traverses, connection pin that has wider center portion) between the legs to maintain the legs a certain distance apart.