Quick-Connection System With Threaded Dog Clutch Lever

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Solution Overview

Problem

Current quick connection systems using elastic levers for fixing connectors are prone to breakage and aging, especially in harsh environments, requiring replacement of the entire connector and posing risks of incipient breakage due to internal tensions.

Innovation Solution

A quick connection system featuring a rotatable lever with a dog clutch and threaded attachment means, where the lever is mounted on a shaft and the connectors are designed to fit together with a return mechanism, ensuring secure locking and easy separation, and utilizing removable fixing means for durability and ease of replacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If an elastic lever made of plastic is used for fixing connectors, then the connection system is simple, but the lever breaks easily and ages badly in harsh environments

Engineering Contradiction:
Improveconnection system simplicityVSAvoidlever durability
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The connector is divided into modular components: a reusable body and replaceable attachment means (lever with dog clutch or bayonet attachment). When the attachment means wears out, only that component needs replacement, not the entire connector. This segmentation resolves the contradiction by maintaining system simplicity while improving lever durability through targeted replacement.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention offers multiple attachment means configurations (dog clutch with threads, bayonet attachment with arms) that can be selected based on specific application requirements. This parameter change allows optimization of lever durability for harsh environments while preserving the overall simplicity of the connection system through standardized body designs.

Inventive Principle:
Principle #35Parameter changes

2Ease of repair

If the lever is made as an integral part of the connector body, then replacement is simple, but the entire connector must be replaced when the lever breaks

Engineering Contradiction:
Improvelever replacement easeVSAvoidconnector material waste
Core Design Contradiction:
Ease of repairVSLoss of substance

Solution Approach 1:

The connector body is separated from the attachment means, allowing the attachment means (lever, dog clutch, bayonet arms) to be replaced independently. This resolves the contradiction by enabling easy replacement of only the worn component rather than the entire connector, reducing material waste while maintaining repair simplicity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The reusable body retains value and can be recovered for continued use, while only the worn attachment means is discarded and replaced. This approach minimizes material waste by preserving the main connector body structure while replacing only the necessary worn components.

Inventive Principle:
Principle #34Discarding and recovering

3Reliability

If a dog clutch with threaded attachment means is used, then secure locking is achieved, but the device complexity increases

Engineering Contradiction:
Improveconnector locking securityVSAvoidattachment means complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The dog clutch and threaded attachment means are merged into a single integrated component. This resolves the contradiction by achieving secure locking through the combined action of the dog clutch engaging with the thread, providing reliable connector fixation without requiring separate complex mechanisms.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The attachment means is designed to perform multiple functions: the threaded portion provides secure locking, while the dog clutch provides positive engagement and positioning. This multi-functionality achieves reliable locking without increasing overall device complexity, as one component fulfills multiple protective and securing roles.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Reliability

If the lever is mounted rotatably on a shaft, then durability is improved, but the device complexity increases

Engineering Contradiction:
Improvelever durabilityVSAvoidlever mounting complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The shaft is extracted as a separate, simple mounting element that allows the lever to be detachably mounted. This resolves the contradiction by providing durable rotatable mounting through the shaft while keeping the overall device complexity low, as the shaft is a simple cylindrical component that facilitates lever replacement and rotation without complex mechanisms.

Inventive Principle:
Principle #2Taking out (Extraction)

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

The system provides improved durability and secure locking of connectors with enhanced resistance to wear and tear, allowing for quick and secure connections while enabling easy replacement of components, thus overcoming the limitations of existing systems.

Implementation Method 1

a lever (104) mounted so as to be able to rotate on the body (102) via a shaft (106)

Methodology Applied
Scientific EffectRotation:

Implementation Method 2

where the first hooking means take the form of a thread (116), where the second hooking means take the form of a thread (304)

Methodology Applied
Scientific EffectThreading: Screw

Implementation Method 3

a return means (108)

Methodology Applied
Scientific EffectElastic force: Elasticity

Data Source

PatentEP3007281B1Quick-connection system comprising two connectors
Publication Date: 2018.08.15 AIRBUS OPERATIONS (SAS)
  • EP3007281B1 patent drawingFigure 1
  • EP3007281B1 patent drawingFigure 2
  • EP3007281B1 patent drawingFigure 3

AI summary

The invention relates to a quick connection system (200) comprising: - a first connector (100) having a body (102), a lever (104) mounted movably in rotation on the body (102) by means of a shaft (106), a return means (108) and a dog (110) mounted at one end of the lever (104) and having first hooking means (116), and - a second connector (300) having a body (302) and second hooking means (304) provided to cooperate with the first hooking means (116).The first connector (100) and the second connector (300) are designed to fit together by being brought together along a connection direction (50), and the lever (104) is movable between a locked position in which the first locking means (116) cooperate with the second locking means (304) to prevent the connectors (100, 300) from separating by moving apart parallel to the connection direction (50), and a free position in which the first locking means (116) do not cooperate with the second locking means (304), thus allowing the connectors (100, 300) to separate by moving parallel to the connection direction (50). The return means (108) is designed to constrain the lever (104) to the locked position, and the first and second locking means (116, 304) are threaded. Such an arrangement avoids, among other things, premature wear of the lever (104).