Spring Nut Casing Structure for Tool-Operated Anti-Loosening
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Solution Overview
Problem
Existing anti-loosening female threaded springs require manual installation or incorporation within the nut, limiting their use with standard tools and complicating fastening processes.
Innovation Solution
An anti-loosening spring nut design that accommodates a female thread spring within an external casing, allowing fastening and loosening with standard tools by utilizing pushing projections to expand or contract the spring diameter, and optionally incorporating an internal casing for a ratchet function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional anti-loosening female threaded spring is used, then the anti-loosening function is maintained, but the device cannot be fastened using standard tools and requires manual installation
Solution Approach 1:
The female threaded spring is nested inside the external casing, allowing the spring to be protected and positioned while the external casing provides the interface for standard tool fastening. This nesting structure enables the complex spring mechanism to be operated through a simple external interface.
Solution Approach 2:
The external casing acts as an intermediary between the standard tool and the female threaded spring. The pushing projection on the casing transfers rotational motion to the spring, enabling tool-based operation without direct manipulation of the spring itself.
2Adaptability or versatility
If the anti-loosening spring nut is designed with standard tool adaptability, then tool adaptability is improved, but the structure becomes more complex
Solution Approach 1:
The external casing is designed with a polygonal cross-section that provides universal adaptability to various standard tools (wrenches, sockets, etc.), while the internal spring mechanism maintains its anti-loosening function. This multi-functionality allows the same structure to work with different tools without increasing complexity.
3Ease of manufacture
If the female thread spring is made expandable for fastening, then the fastening mechanism is improved, but the control of spring expansion becomes difficult
Solution Approach 1:
The pushing projection is pre-positioned on the external casing to automatically contact and expand the female threaded spring during the fastening process. This preliminary positioning ensures that the spring expands at the correct moment and to the correct degree, eliminating the need for separate control mechanisms.
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
Enables quick and efficient fastening of bolts using standard tools while maintaining anti-loosening functionality, enhancing tool adaptability and preventing bolt loosening due to vibrations or impacts.
Implementation Method 1
the pushing projection 114 comes in contact with and presses against the upper catching loop end 121, expanding an outer diameter of the female thread spring 120
Data Source
AI summary
Provided is an anti-loosening spring nut including: a female thread spring which is wound a certain number of times along male threads of a bolt, and at whose lower portion and upper portion are projectingly formed, respectively, a lower catching loop end and an upper catching loop end, at directions different from each other and outward in a radial direction, and an external casing which has a shape of an enclosure accommodating the female thread spring, on a bottom plate of which is penetratingly formed a bolt insertion hole into which the bolt is inserted, and along whose side face are provided a plurality of pushing projections which are depressedly formed inward at constant intervals.