Bolt Crest Expansion Tool for Anti-Loosening Fastening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fastened bolts tend to loosen due to vibration or thermal expansion/contraction, leading to potential device damage or accidents, and mass-produced bolts have limited specifications and applications.
Innovation Solution
A hand tool with a block-shaped jig body featuring a first bolt hole, a longitudinal second bolt hole, and a hemispherical suppression portion that expands a crest on a bolt when pressed, increasing torque required to remove the bolt, thus enhancing locking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mass-produced fastened bolts are used, then the manufacturing cost is reduced, but the adaptability to different specifications and applications is limited
Solution Approach 1:
The invention enables the bolt to modify itself by expanding the crest on its shaft using a simple hand tool. The bolt serves its own customization need by creating a localized interference fit feature that adapts it to specific applications, eliminating the need for different pre-manufactured bolt types.
Solution Approach 2:
The expansion of the bolt crest is performed as a preliminary action before final assembly. By pre-expanding the crest at the selected position, the bolt is prepared to create an interference fit with the hole or nut, ensuring proper locking force before the bolt is installed.
2Reliability
If a crest expansion tool is used to process bolts, then the locking force is improved, but the device complexity increases
Solution Approach 1:
The tool is divided into separate functional components: a jig body with positioning holes, a packing bolt with a suppression portion, and cutting slots. This segmentation allows each component to perform its specific function while keeping the overall tool simple and disassemblable.
Solution Approach 2:
The jig body acts as an intermediary device that holds the bolt and guides the packing bolt. It provides positioning holes that align the packing bolt's suppression portion with the bolt crest, enabling precise localized expansion without requiring a complex integrated tool.
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 tool allows for quick and convenient processing of bolts to prevent loosening, reducing costs and offering a high price-quality ratio, as it can be used with various bolt specifications and is compact for easy portability.
Implementation Method 1
The suppression portion of the packing bolt is pressed down on a selected position of the bolt, to cause a crest at the selected position to expand outward
Data Source
AI summary
A hand tool for bolts fastening includes a block-shaped jig body, a first bolt hole is disposed in the jig body laterally and a second bolt hole is disposed in the jig body longitudinally, an end of the second bolt hole is in communication with the first bolt hole, the second bolt hole allows a packing bolt to pass through and be screwed, a hemispherical suppression portion is disposed at an end of the packing bolt, the first bolt hole allows a to-be-fastened bolt to be screwed, the suppression portion of the packing bolt is pressed down on a selected position of the bolt, to cause a crest at the selected position to expand outward, so that interference occurs when the bolt is screwed with a bolt hole or a nut, to increase a torque force required to make the bolt come off.