Firearm Castle Nut Anti-Loose Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional anti-loose castle nut designs for firearms damage the receiver end plate during installation and make it non-reusable, limiting the ability to repeatedly install and remove the components.
Innovation Solution
A design featuring a castle nut with a groove around its exterior circumference and a receiver end plate with a perpendicular through hole, where a securing device is used to interlock with the groove, preventing the castle nut from loosening without damaging the end plate, allowing for repeated assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional staking method is used to create anti-loose castle nut, then the castle nut is prevented from loosening, but the receiver end plate is damaged and cannot be reused
Solution Approach 1:
The invention divides the anti-loose mechanism into two separate components: the castle nut with a groove and the receiver end plate with a through hole. The securing device (such as a pin or roll pin) is inserted through the through hole and engaged with the groove to prevent loosening. This segmentation allows the receiver end plate to remain intact and reusable while still achieving the anti-loose function.
Solution Approach 2:
The invention introduces a third component (the securing device such as a pin or roll pin) as an intermediary between the castle nut and the receiver end plate. This intermediary element engages with both components to prevent loosening without requiring direct modification or damage to the receiver end plate itself, thereby maintaining its reusability.
2Reliability
If staking process is applied to secure the castle nut, then the castle nut is prevented from loosening, but the receiver end plate suffers damage
Solution Approach 1:
The anti-loose mechanism is segmented into separate functional elements: the groove in the castle nut, the through hole in the receiver end plate, and the securing device. This segmentation eliminates the need for staking that would damage the receiver end plate, as the securing device passes through the pre-drilled through hole and engages with the groove without deforming the end plate material.
Solution Approach 2:
The securing device (pin or roll pin) serves as an intermediary that achieves the anti-loose function without directly damaging the receiver end plate. Instead of staking that deforms and damages the end plate, the intermediary securing device engages with the groove while passing through the through hole, preventing loosening without harmful deformation.
3Device complexity
If traditional castle nut design without groove is used, then the structure is simpler, but the castle nut can be loosened during use
Solution Approach 1:
The castle nut is given a groove around its exterior circumference, creating a segmented structure that works in conjunction with the through hole in the receiver end plate. This groove provides a mechanical engagement point for the securing device (pin or roll pin), preventing the castle nut from loosening while maintaining relative structural simplicity.
Solution Approach 2:
The groove in the castle nut provides a simple structural feature that serves as an engagement point for the securing device intermediary. This groove, combined with the through hole and securing device, creates an effective anti-loose mechanism without requiring complex structures or modifications to the castle nut itself.
Data Source
AI summary
A castle nut has a groove around an exterior circumference thereof. An end plate has a through hole extending in a direction perpendicular to a longitudinal axis of a firearm. When a buffer tube is threaded onto a lower receiver of the firearm with the buffer tube traversing through the castle nut and the end plate, the castle nut can be screwed in a direction toward the lower receiver to fasten the end plate against the lower receiver. When the end plate is fastened against the lower receiver by the castle nut, the securing device can be screwed into the through hole of the end plate such that a portion of the securing device is engaged with the groove of the castle nut to prevent the castle nut to be loosened by being unscrewed in a direction away from the lower receiver.