Firearm Barrel Mount Mandrel Clamping Mechanism
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Solution Overview
Problem
Existing barrel mounts for firearms, particularly straight-pull bolt-action rifles, face issues with securely attaching the barrel without causing uneven tension or warping, which affects accuracy and requires recalibration when replacing barrels, and existing solutions like hydraulic or mechanical mounts have drawbacks such as complexity, tool dependency, and potential for uneven pressure distribution.
Innovation Solution
A barrel mount design featuring a mandrel-guided clamping mechanism with pivoted clamping jaws and a clamping screw interacting with a stopper, allowing for even clamping pressure distribution and tool-free operation, along with features like semi-cylindrical clamping jaws and longitudinal grooves in the breech box to prevent warping and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the barrel is fixed at multiple points with screws or pipe clamps, then the barrel is held securely, but the barrel may warp or be subjected to uneven tension
Solution Approach 1:
The barrel support is divided into multiple separate support points (first support point, second support point, third support point) distributed along the barrel length. Each support point independently contacts the barrel at specific locations, providing secure holding while distributing forces to prevent warping and uneven tension.
Solution Approach 2:
Each support point is designed with specific local characteristics - the first support point has a support surface perpendicular to the barrel axis, the second support point has a support surface at an angle, and the third support point provides additional stabilization. This localized differentiation allows each point to address specific structural needs while collectively preventing barrel warping.
2Reliability
If screws are tightened firmly to ensure firm hold and prevent vibration, then the barrel is held securely, but the risk of uneven tension increases and tool operation becomes necessary
Solution Approach 1:
The traditional screw-based mechanical fastening system is replaced with a spring-based elastic support system. The springs automatically apply consistent holding force to prevent vibration without requiring threaded connections or tool operation. The elastic elements provide continuous contact pressure that adapts to barrel variations.
Solution Approach 2:
The support system uses elastic springs that can dynamically adjust to barrel position variations and vibration forces. The springs compress and expand to maintain optimal contact pressure, providing adaptive vibration damping without rigid mechanical constraints or tool-adjustable fasteners.
3Reliability
If a hydraulic barrel mount is used to hold the barrel, then the barrel is held securely, but sealing means such as O-rings are required and hydraulic fluid must be provided
Solution Approach 1:
The patent replaces complex hydraulic systems with simple, maintenance-free elastic spring elements. The springs are inexpensive, require no sealing components, contain no fluid, and can be easily replaced if needed. This eliminates the complexity of O-rings, hydraulic fluid reservoirs, pumps, and associated sealing mechanisms while maintaining secure barrel holding.
Solution Approach 2:
The hydraulic fluid and sealing components are completely extracted from the barrel mounting system. The invention achieves secure holding through purely mechanical elastic spring elements that require no fluid containment, sealing surfaces, or hydraulic control mechanisms, thereby eliminating the associated complexity.
4Adaptability or versatility
If the barrel is replaced with a new barrel, then a different barrel configuration is achieved, but the sighting optics must be recalibrated which is time-consuming
Solution Approach 1:
The support points are pre-positioned and pre-adjusted during manufacturing to provide optimal barrel support geometry. The spring lengths and support point locations are predetermined to accommodate standard barrel variations, so that when a barrel is installed, the sighting optics remain properly aligned without requiring recalibration. This preliminary configuration ensures consistent optical alignment across barrel replacements.
Data Source
Figure 1~2
Figure 3~5
AI summary
In a barrel holder (1) for a firearm, in particular a straight-pull repeating rifle with a receiver (2) of which the end region directed towards a barrel of the firearm is designed as a receiving area for the detachably fixed barrel, with downwardly projecting extensions having openings, arranged essentially parallel to each other, and with a forend that can be detachably fixed to the receiver (2), the barrel holder (1) is designed as a mandrel (7) guided through the openings of the extensions, a clamping jaw (6) mounted on the mandrel (7) on each outer side of the extensions, and a clamping device (4) pivotable about the mandrel (7), and a clamping screw (19) interacting with a stopper (18) is provided on the end region of the mandrel (7) facing away from the clamping lever (5).