Double Cover Structure for Munition Case Pressure and Assembly

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Solution Overview

Problem

Existing shooting cases for remote controlled munitions are limited by the use of multiple shear pins, which restrict internal pressure increase, leading to reduced munition range and increased manufacturing costs due to complex assembly processes.

Innovation Solution

A double cover structure with a cover fixing member that screws onto the shooting case main body, using a conic munition insertion part and O-ring sealing to fix and seal the cover member, eliminating the need for shear pins and simplifying assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple shear pins are used to fix the cover member, then the cover position is fixed reliably, but the internal pressure cannot be increased sufficiently and manufacturing costs increase

Engineering Contradiction:

Improvecover position fixationVSAvoidinternal pressure

Core Design Contradiction:

ReliabilityVSStress or pressure

Solution Approach 1:

The patent removes the shear pins from the system entirely and replaces them with a cover fixing member that uses a screw-threaded connection. This extraction of the problematic component (shear pins) eliminates the restriction on internal pressure while maintaining cover fixation through an alternative mechanism that allows pressure buildup.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the fixation mechanism from a rigid pin-based system to a threaded connection system with a cover fixing member. This parameter change in the connection method allows the cover to remain securely fixed while accommodating higher internal pressures, as the threaded connection can better distribute and withstand the pressure forces.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If multiple shear pins are used to fix the cover member, then the cover position is fixed reliably, but manufacturing costs increase and assembly process becomes complex

Engineering Contradiction:

Improvecover position fixationVSAvoidassembly process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent extracts and removes the multiple shear pins and their associated complex assembly process. The cover fixing member with threaded connection simplifies the assembly to a single component that can be installed and secured in one operation, eliminating the need for multiple pin insertions and alignments.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the functions of multiple shear pins into a single integrated cover fixing member. This consolidation reduces the number of parts from multiple pins to one component, simplifying both the device structure and the assembly process while maintaining the necessary fixation reliability.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If multiple shear pins are used to fix the cover member, then the cover position is fixed reliably, but productivity decreases

Engineering Contradiction:

Improvecover position fixationVSAvoidassembly speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent removes the time-consuming shear pin assembly process and replaces it with a faster threaded connection method. The cover fixing member can be installed and secured more quickly than inserting and aligning multiple shear pins, directly improving assembly speed and productivity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The cover fixing member is designed with a preliminary threaded structure that guides the assembly process, allowing the cover to be fixed in one continuous motion rather than requiring multiple discrete steps for pin insertion and securing. This preliminary design of the threaded connection accelerates the assembly operation.

Inventive Principle:

Principle #10Preliminary action

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 solution increases internal pressure, enhancing munition range and maintaining performance while reducing manufacturing costs and assembly time by simplifying the sealing structure.

Implementation Method 1

a conic munition insertion part into which a part of the explosive body is inserted and having a diameter gradually decreased toward an upper side may be disposed on a lower surface of the cover member

Methodology Applied

Scientific EffectConic geometry pressure concentration: Geometry

Implementation Method 2

O-ring sealing to fix and seal the cover member

Methodology Applied

Scientific EffectElastic deformation sealing: Elasticity

Data Source

PatentUS11808557B2Cover structure with double cover structure and shooting case of munition having same

Publication Date: 2023.11.07 HANWHA AEROSPACE CO LTD

AI summary

Proposed is a cover structure with a double cover structure and a shooting case of munition having the same. The cover structure with a double cover structure includes: a shooting case main body having an inner space with an open upper side; a cover member seated on the open upper side of the shooting case main body to seal the open upper side; and a cover fixing member coupled to the shooting case main body to fix a position of the cover member, so that the position of the cover member is strongly fixed while simplifying a structure by the double cover structure to increase an internal pressure of the shooting case, thereby increasing a range of munition and maintaining performance of munition.