Break-Barrel Extraction Assembly for Selective Shell Ejection
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Solution Overview
Problem
Existing break-barrel firearms have extraction assemblies with complex structures that are difficult to automate and require manual machining, and they struggle to differentiate between unexploded and exploded ammunition casings.
Innovation Solution
A break-barrel firearm with a simple extraction assembly that includes an extractor device with an engagement element and a retention element, allowing for selective ejection modes through an ejection trigger device, enabling automated production and differentiation between unexploded and exploded ammunition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex extraction assemblies with special notches are used to differentiate between unexploded and exploded ammunition, then the extraction function is improved, but the manufacturing complexity increases and automation becomes difficult
Solution Approach 1:
The extractor device is segmented into distinct functional elements: an engagement element with a slot for selective engagement, and a retention element with a protrusion that can be positioned in different configurations. This segmentation allows each element to perform its specific function independently, simplifying the overall structure while maintaining reliable extraction functionality.
Solution Approach 2:
The retention element is designed to be movable between different configurations (engaged and disengaged positions) based on the state of the ammunition. This dynamic capability allows the extractor to adapt its behavior automatically - providing strong engagement for unexploded ammunition and selective ejection for exploded casings - without requiring complex mechanical structures or manual adjustments.
2Adaptability or versatility
If special notches with complex machining are used in extraction devices, then the ability to operate differently on unexploded and exploded ammunition is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The complex notching operation is extracted and replaced by a simpler protrusion-retention element interface. The retention element has a simple protrusion that engages with a corresponding feature on the engagement element, eliminating the need for complex notches while maintaining the ability to differentiate between ammunition states through the movable retention mechanism.
Solution Approach 2:
The extraction assembly is designed to automatically differentiate between unexploded and exploded ammunition through the interaction of the engagement element and movable retention element, without requiring complex pre-machined notches or manual intervention. The system self-adjusts based on the ammunition state, simplifying manufacturing while maintaining operational versatility.
3Manufacturing precision
If manual machining processes are used for extraction assembly, then the manufacturing precision can be achieved, but the productivity decreases
Solution Approach 1:
The design uses simple geometric features (slot and protrusion) that can be easily replicated through automated machining processes. These features do not require complex manual machining techniques, allowing for consistent precision to be achieved through automation, thereby increasing productivity while maintaining manufacturing precision.
4Ease of manufacture
If the extraction assembly is simplified for automated production, then the ease of manufacture is improved, but the ability to differentiate between ammunition types may deteriorate
Solution Approach 1:
The movable retention element provides dynamic adaptability that compensates for the simplicity of the overall structure. This single movable component enables the system to automatically differentiate between unexploded and exploded ammunition through its ability to transition between engaged and disengaged configurations, maintaining operational versatility while enabling automated production.
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 allows for effective and reliable ejection of exploded casings while minimizing movement of unexploded ammunition, facilitating manual extraction, and enabling a compact, robust firearm design.
Implementation Method 1
an elastic element configured to store an elastic preload and to drive the engagement element to eject the casing from the at least one barrel when the retention element is in the release configuration
Data Source
AI summary
A firearm comprising at least one frame defining a housing seat of a barrel group; and a barrel group comprising at least one barrel with longitudinal development axis (A), the barrel group being mounted in a tilting manner with respect to the frame between a position in which the barrel group engages the housing seat and a position in which the barrel group is rotated with respect thereto. The barrel group comprises at least one extractor device associated with the barrel and configured to at least partially expel at least a portion of an ammunition from the at least one barrel. The extractor device is configured to selectively operate in a first mode in which it integrally ejects a casing of an exploded ammunition and in a second mode in which it accompanies part of an unexploded ammunition in partial exited from the at least one barrel.