Bending Bolt Anti-Loosening Nut With Inclined Dual-Nut Locking
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Solution Overview
Problem
Existing mechanical fastening solutions, such as hardlock nuts, are complex, expensive, and prone to thread damage due to high material requirements, making them unsuitable for small nuts and difficult to disassemble, especially in applications with severe vibrations.
Innovation Solution
A bending bolt type anti-loosening nut design featuring stacked upper and lower nuts with an inclined surface, allowing for elastic deformation of the bolt to prevent loosening, which is easy to manufacture and suitable for small nuts, using ordinary materials and facilitating disassembly without plastic deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardlock nut with positive tapered hole and eccentric cone is used, then anti-loosening effect is improved, but structure complexity increases and manufacturing cost increases
Solution Approach 1:
The anti-loosening function is segmented into two separate nuts: a locking nut with an inclined surface and a fastening nut. This divides the complex hardlock nut structure into simpler, modular components that are easier to manufacture and assemble while maintaining the anti-loosening effect through the inclined surface mechanism.
2Reliability
If hardlock nut with positive tapered hole and eccentric cone is used, then anti-loosening effect is improved, but manufacturing cost increases due to strict material requirements
Solution Approach 1:
The invention changes the geometric parameters by introducing an inclined surface with a specific angle range (5°-15°) on the locking nut. This parameter change enables the anti-loosening function to be achieved through geometric design rather than requiring high-strength materials and complex heat treatment processes, thereby reducing manufacturing cost and material requirements.
3Reliability
If hardlock nut with positive tapered hole and eccentric cone is used, then anti-loosening effect is improved, but thread damage occurs making disassembly difficult
Solution Approach 1:
The inclined surface on the locking nut creates a dynamic locking mechanism where the nuts lock together through elastic deformation during tightening, but can be easily separated by reversing the rotation. This dynamic behavior allows the system to maintain strong anti-loosening properties during operation while enabling easy disassembly when needed, avoiding permanent thread damage.
4Reliability
If hardlock nut with positive tapered hole and eccentric cone is used, then anti-loosening effect is improved, but nut outer hexagon size increases making installation difficult in tight spaces
Solution Approach 1:
By segmenting the anti-loosening function into two smaller nuts (locking nut and fastening nut) rather than one large hardlock nut, the overall outer hexagon size is reduced. This segmentation allows the components to fit in tighter spaces while collectively providing the same anti-loosening functionality through their combined 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 design effectively prevents nut loosening under severe vibrations, is cost-effective, and allows for easy installation and disassembly, making it suitable for a wide range of applications including miniature nuts in devices like micro motors and glasses.
Implementation Method 1
the bolt is forced to undergo bending elastic deformation, the point contact between the upper nut and lower nut changes to surface contact
Implementation Method 2
when the two nuts are locked, the contact point in the initial state is used as the fulcrum, so that the bolt is forced to undergo bending elastic deformation
Data Source
AI summary
The invention proposes a kind of bending bolt type anti-loosening nut, which relates to the technical field of mechanical fastening. It comprises an upper nut and a lower nut, the upper nut and the lower nut are stacked on the outside of the bolt and used to tightly connect the bolt to the connecting piece, the lower nut is arranged close to the connecting piece, the upper nut is arranged on the outer end surface of the lower nut; the adjacent end between the upper nut and lower nut is provided with an inclined surface, the inclined surface is inclined towards the interior of the upper nut, so that an inclined plane angle with deformation space between the upper nut and lower nut is formed; the invention achieves the effect of preventing nut loosening, is low in price, easy to manufacture, and suitable for small or miniature anti-loosening nuts.