Firearm Stock Play-Free Barrel Connection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-precision firearms like long guns used in biathlon, the fit of the action and barrel on the stock is often suboptimal, leading to vibrations and rattling due to unwanted play between parts.
Innovation Solution
A firearm design featuring a pre-shaped stock with support areas and a barrel system where gaps between the stock and barrel are filled with a fluid material that solidifies, creating a play-free, secure connection using channels, recesses, and elevations, and potentially incorporating 3D printed 'skins' and honeycomb structures for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fitting methods are used to attach the barrel and action to the stock, then the assembly process is simple, but play and gaps between parts cause vibrations and rattling
Solution Approach 1:
The stock is pre-shaped with defined support areas, channels, recesses, and elevations before assembly. This preliminary structuring creates a precise framework that guides the fluid material to exact locations, ensuring optimal fit and eliminating play between components while maintaining manufacturing efficiency
Solution Approach 2:
A fluid material acts as an intermediary substance that fills the spaces between the stock and the barrel/action assembly. This material bonds the components together, eliminating gaps and play while distributing stresses uniformly across the connection interface
2Manufacturing precision
If the stock is pre-shaped with support areas and spaces, then a play-free connection is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The stock manufacturing process utilizes parameter changes in material state, transitioning from a formable state during shaping to a rigid state after curing. This allows complex geometries with support areas, channels, and recesses to be created efficiently using modern composite manufacturing techniques
Solution Approach 2:
The stock structure incorporates nested geometric features where channels and recesses are integrated within the stock body itself. This nested design eliminates the need for separate components while achieving the precise fit requirements
3Object-generated harmful factors
If fluid material is used to fill spaces between stock and barrel, then vibrations are eliminated, but the material must be precisely positioned
Solution Approach 1:
The channels and recesses are pre-formed in the stock before material injection. This preliminary structuring acts as a guide system that directs the fluid material precisely to where it is needed, eliminating the need for complex real-time monitoring during the filling process
Solution Approach 2:
The problem of material placement precision is solved by extracting the material confinement function into the pre-formed channels and recesses. These structural features physically constrain the material to specific paths and locations, making precise positioning inherent to the geometry rather than requiring active control
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
This design ensures a durable, play-free connection between the barrel and stock, eliminating vibrations and rattling, resulting in improved stability and accuracy.
Implementation Method 1
spaces in the form of channels and/or recesses and/or elevations are provided between the stock and the system and/or at least partially the barrel associated with this system and/or at least partially around the support areas, which are filled with a material that is initially fluid and then solidifies
Implementation Method 2
filled with a material that is initially fluid and then solidifies and fits smoothly and fills the spaces
Data Source
Figure 1
Figure 2
Figure 3~6
AI summary
The invention relates to a firearm (1) with a stock (4) carrying a system (2) and a barrel (3) associated thereto, wherein the stock (4) is pre-shaped in a defined manner and forms bearing areas (41) for the system and the barrel (3) associated thereto, wherein play between stock (4) and/or system (2) and/or the barrel (3) associated thereto is avoided by providing spaces (43) in the form of channels and/or recesses and/or elevations (44) between stock (4) and/or system (2) and/or at least partially the barrel (3) associated thereto and/or at least partially around the bearing areas (41), which are filled with a material that is initially fluid and then solidifies, fitting without play and filling the spaces.