Breech Head Barrel Exchange Mechanism
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Solution Overview
Problem
Existing bolt-action rifles require labor-intensive disassembly to change barrels and breech components, with complex and space-consuming locking mechanisms that complicate simultaneous barrel and breech exchange.
Innovation Solution
A bolt-action rifle design where the breech is divided into a lockable breech head and body, allowing for simultaneous removal of the barrel by separating the breech head from the breech body when locked, utilizing a coaxial bore and coupling pieces for secure connection, and a rotatable eccentric for easy detachment of the barrel from the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the barrel and breech are made interchangeable with separate locking mechanisms, then versatility and adaptability are improved, but device complexity and difficulty of operation increase due to labor-intensive disassembly requirements
Solution Approach 1:
The patent combines the barrel locking mechanism and breech locking mechanism into a single integrated locking body that performs both functions simultaneously. The locking body engages with both the barrel and breech through unified locking elements, eliminating the need for separate disassembly operations and reducing overall device complexity while maintaining interchangeability.
Solution Approach 2:
The locking body is segmented into distinct functional zones: a first locking element for barrel engagement and a second locking element for breech engagement. This segmentation allows independent optimization of each locking function while maintaining a unified structure that simplifies the overall operation.
2Reliability
If traditional separate locking mechanisms are used for barrel and breech, then reliability of individual locking is maintained, but time consumption and operational complexity increase during component exchange
Solution Approach 1:
The locking body is pre-configured with both barrel and breech locking elements in fixed spatial relationships. Before component exchange is needed, the locking mechanism maintains both connections simultaneously, allowing for rapid simultaneous release of both barrel and breech without sequential operations, thereby reducing time loss while preserving locking reliability.
3Device complexity
If the breech is designed as a single integrated unit, then structural simplicity is maintained, but space requirements and difficulty of simultaneous barrel-breech exchange increase
Solution Approach 1:
The breech is segmented into a breech body and a separate breech head that can be independently removed. This segmentation reduces the volume of the moving component during exchange operations, as only the lighter breech head needs to be manipulated separately from the main breech body, thereby reducing space requirements while maintaining structural simplicity of the overall breech assembly.
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 space-efficient exchange of barrels and breech components with minimal manipulations, ensuring reliable locking and easy operation, allowing for ready insertion and removal of different barrels and breech heads.
Implementation Method 1
a rotatable eccentric for easy detachment of the barrel from the housing
Implementation Method 2
held there by coupling pieces (in particular balls) engaging in a circumferential groove
Data Source
Figure 1
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AI summary
The repeating rifle has housing, an impeller and a closure (3) that is locked with the impeller and is guided in housing, where the impeller is connected detachably with the housing. The impeller is connected firmly with a locking bush at its rear end, where an inner wall of the locking bush forms a locking zone with locking parts. The outer wall of the locking bush is seated in housing.