Fixing Bolt With Flexible Sleeve And Locking Nail
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Solution Overview
Problem
Conventional fixing bolts are complex and difficult to remove from the bore, necessitating a simpler and more cost-effective solution for quick installation and easy removal.
Innovation Solution
A fixing bolt comprising a flexible sleeve with a conical hole, internal threading, annular protrusions, slits forming paws, and a locking nail with a forcing section that expands or retracts the paws for secure anchoring or de-anchoring, allowing easy installation and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fixing bolt with multiple components (locking stem, flexible sleeve, adjustable tube, nuts) is used, then the fixing strength and reliability are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the locking stem, flexible sleeve, and adjustable tube into a single integrated fixing bolt structure. The forcing section integrates the functions of the original locking stem's forcing wedge, while the flexible sleeve incorporates the retaining paws and expansion mechanism. This merging reduces the number of components from four separate parts to one unified structure, simplifying assembly and manufacturing while maintaining the reliable fixing function through the coordinated expansion of paws within the bore.
Solution Approach 2:
The flexible sleeve is segmented by slits that divide it into multiple independent paws. This segmentation allows each paw to expand and contract independently when the forcing section is rotated, enabling the fixing bolt to adapt to the bore dimensions while maintaining structural integrity. The segmented design provides the necessary flexibility for installation and removal while ensuring reliable anchoring during use.
2Reliability
If a conventional fixing bolt with multiple nuts and components is used, then the anchoring reliability is improved, but the ease of operation for removal deteriorates
Solution Approach 1:
The patent extracts the complex multi-nut locking mechanism from the conventional fixing bolt and replaces it with a simplified single-rotation removal system. The forcing section's threaded engagement with the flexible sleeve's internal threads allows the entire anchoring system to be released by rotating a single component, extracting the removal function from multiple interacting parts to a single straightforward action.
Solution Approach 2:
The fixing bolt employs a dynamic expansion and contraction mechanism where the paws can transition between expanded (anchored) and retracted (removed) states. By rotating the forcing section, the user dynamically controls the paw position, allowing the system to switch between securely anchored and easily removable states without complex locking mechanisms.
3Reliability
If a conventional fixing bolt with multiple components is used, then the fixing security is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple separately manufactured components into a single integrated fixing bolt that can be produced as one piece or pre-assembled unit. This eliminates the need for separate manufacturing, quality control, and assembly processes for the locking stem, flexible sleeve, adjustable tube, and nuts, significantly reducing manufacturing complexity and cost while maintaining all necessary fixing security functions within the unified structure.
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 solution simplifies the structure, reduces manufacturing costs, and enables quick and convenient fixing and removal of the bolt, ensuring secure anchoring and easy operation.
Implementation Method 1
the conical portion immediately following the cylindrical portion... when the locking nail is rotated, the forcing section moves into or from the conical hole of the flexible sleeve so as to outwardly expand or inwardly retract the paws of the flexible sleeve
Implementation Method 2
an external threaded section configured to be in threaded engagement with the internal threaded section of the flexible sleeve
Data Source
AI summary
A fixing bolt contains: a flexible sleeve and a locking nail. The flexible sleeve is provided with an internal threaded section above a conical hole, multiple-annular protrusions, and multiple projected wings. Furthermore, the flexible sleeve defines a plurality of slits to communicate with the conical hole, and extend across the multiple annular protrusions to be joined at a central axis of the flexible sleeve, below the conical hole, so that a lower portion of the flexible sleeve is formed into a plurality of paws. The locking nail includes an external threaded section configured to be in threaded engagement with the internal threaded section of the flexible sleeve, a driving head, and a forcing section. Furthermore, the forcing section of the locking nail includes a cylindrical portion and a conical portion to facilitate expanding or retracting the paws of the flexible sleeve, thus anchoring or de-anchoring the flexible sleeve.