Weapon Shell Loading Stretcher Parallelogram Mechanism
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Solution Overview
Problem
Existing shell loading devices for weapons are complex and time-consuming due to the combination of tilting and translation movements, which disrupts recoil and increases loading time, and lack sufficient rigidity for using impeller-type loading means.
Innovation Solution
A loading device with a stretcher that utilizes a finger lock mechanism, a driving rod, and a transverse groove to facilitate a single motor-driven movement from the shell deposition position to the positioning position, ensuring alignment and protection of the weapon's cone while maintaining rigidity through a deformable parallelogram structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stretcher combines tilting and translation movements to position the shell, then the shell can be reliably positioned in the chamber, but the loading time increases and the device complexity increases
Solution Approach 1:
The movement is segmented into two distinct phases: first tilting the stretcher to align with the weapon axis, then translating it forward. This segmentation allows each movement type to be optimized independently, reducing total loading time while maintaining reliable positioning.
Solution Approach 2:
The stretcher support structure uses a deformable parallelogram mechanism that dynamically adjusts during operation. The parallelogram deforms to accommodate the transition from tilting to translation, enabling smooth phase change and improving overall system responsiveness.
2Reliability
If the stretcher combines tilting and translation movements, then the shell can be positioned correctly, but the device complexity increases
Solution Approach 1:
The driving rod serves multiple functions: it tilts the stretcher support during the first phase and then translates the stretcher during the second phase. This multi-functionality reduces the number of separate actuators needed, simplifying the overall device complexity while maintaining reliable positioning.
Solution Approach 2:
The deformable parallelogram acts as an intermediary mechanism between the driving rod and the stretcher. It mediates the complex motion requirements by providing a smooth transition between tilting and translation phases, reducing the complexity of direct actuation mechanisms.
3Measurement precision
If the stretcher is moved over a significant length, then the shell can be positioned accurately, but interference occurs and loading time increases
Solution Approach 1:
The stretcher is first tilted into the correct angular position before translation begins. This preliminary action ensures that the stretcher is properly aligned with the weapon chamber axis, preventing interference during the subsequent translation phase and enabling accurate positioning.
Solution Approach 2:
The deformable parallelogram provides dynamic adjustment during the translation phase, allowing the stretcher to maintain proper alignment while moving through the significant length required for accurate positioning, thereby preventing interference with the weapon system.
4Ease of operation
If the device lacks sufficient rigidity, then the structure is more flexible, but impeller-type loading means cannot be used
Solution Approach 1:
The deformable parallelogram provides dynamic rigidity - remaining flexible during the tilting phase for ease of operation, then becoming rigid during the translation phase to support impeller-type loading means. This dynamic stiffness adjustment enables compatibility with high-performance loading mechanisms.
Solution Approach 2:
The system changes its rigidity parameter dynamically during operation. The parallelogram structure transitions from a more flexible state during tilting to a rigid state during translation, allowing the device to accommodate both operational requirements and support impeller-type loading means.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The subject matter of the invention is a device for loading a shell into the chamber of a weapon, said device comprising a stretcher (2) intended to receive the shell, which stretcher can be moved in order to bring it closer to the chamber (3) of the weapon and position the shell. This loading device is characterised in that the stretcher (2) is slidably mounted on a stretcher support (7) in a positioning direction, the stretcher support being connected to the weapon by a set of load-bearing rods (16a, 16b) forming a deformable parallelogram, allowing the stretcher support to move whilst maintaining the positioning direction parallel to the axis of the barrel of the weapon. The load-bearing rods are driven by a pivoting drive rod (21) connected to a drive means, the drive rod being secured to a load-bearing rod (16b) by an unlockable locking means and being connected to the stretcher (2) at one end by means of a sliding pivot link (28, 29).