Connecting Rod Coupling with Groove Locking for Fast Aircraft Assembly
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Solution Overview
Problem
Existing coupling devices for connecting rods to aircraft fuselage structures face challenges in achieving simple, quick assembly while effectively compensating for manufacturing-related tolerances.
Innovation Solution
A coupling device comprising a first coupling element with an elongated body and a first groove structure, and a second coupling element with a hollow cylindrical section and a complementary second groove structure, allowing for quick mechanical connection and tolerance compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional fastening systems are used to connect components to the fuselage structure, then the connection strength is sufficient, but the assembly process is time-consuming and complex
Solution Approach 1:
The coupling device is divided into distinct functional elements: a first coupling element with groove structures, a second coupling element with complementary grooves, a closure body, and a securing element. This segmentation allows each component to perform its specific function independently, enabling quick assembly while maintaining connection strength.
Solution Approach 2:
The first coupling element is inserted into the hollow cylindrical section of the second coupling element, creating a nested configuration. The closure body then closes the radial cutout, and the securing element fastens the assembly. This nested structure enables compact design and rapid assembly without complex external fastening mechanisms.
2Manufacturing precision
If rigid connection methods are used to ensure structural integrity, then the strength is high, but the ability to compensate for manufacturing tolerances is reduced
Solution Approach 1:
The coupling device incorporates adjustable elements that allow for dynamic adaptation to tolerance variations. The groove structures and their complementary features enable positional adjustment during assembly, while the securing element provides adjustable fastening force. This dynamic capability allows the connection to accommodate manufacturing tolerances while maintaining sufficient strength.
3Reliability
If multiple fastening components are used to ensure reliable connection, then the connection reliability is high, but the assembly time increases
Solution Approach 1:
The groove structures are pre-formed on the coupling elements during manufacturing, eliminating the need for现场 alignment or adjustment during assembly. The closure body and securing element are designed to be quickly positioned and fastened. This preliminary preparation of geometric features enables rapid assembly while ensuring reliable connection through precise geometric engagement.
4Adaptability or versatility
If simple coupling structures are used to reduce device complexity, then the assembly is quicker, but the adjustable strength capability is limited
Solution Approach 1:
The coupling device uses standard groove structures that can be manufactured with common machining processes, making the design universally applicable to various connecting rod configurations. The same basic structure provides both tolerance compensation and adjustable strength capability through the securing element. This multi-functionality achieves adaptability without proportionally increasing device complexity.
Data Source
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Figure 3~4
Figure 5a~5b
AI summary
A coupling device for a connecting rod for attaching a component to the fuselage structure of an aircraft and/or for stiffening the fuselage structure comprises a first coupling element and a second coupling element that can be coupled to the first coupling element, wherein the first coupling element has an elongated body having a first groove structure on a lateral surface along a first longitudinal axis, wherein the second coupling element has a hollow cylindrical section having a second groove structure complementary to the first groove structure on an inner surface along a second longitudinal axis, wherein the hollow cylindrical section has a radial cutout through which the elongated body can be inserted radially from outside the hollow cylindrical section into the second groove structure, and wherein the second coupling element has a locking element.which is designed to close the radial cutout, is removable and positionable in the cutout and complements the second groove structure on a radially inner surface, and wherein the second coupling element further comprises a locking element which can be slid onto the hollow cylindrical section to secure the closure body to the hollow cylindrical section.