Aeronautic Insert Securing Device with Anti-Rotation Features
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing attachment systems for engine mount rods in aeronautics face issues with loosening due to rotation and vibrations, leading to potential separation, and existing anti-loosening devices are heavy, bulky, and pose safety risks during maintenance.
Innovation Solution
A compact, lightweight securing device with planar parts and a locking system that prevents rotation of the insert within the structure, using projections and recesses for secure positioning and a detachable or non-detachable head to immobilize the insert, made from high-temperature and load-compatible materials like steel or Inconel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional attachment systems with nuts and screws are used, then the insert can be secured in the structure, but the fastening elements can loosen and separate due to rotation and vibrations
Solution Approach 1:
The attachment system is divided into distinct functional segments: the insert with protrusions, the planar part with recesses, and the shaft with head. This segmentation allows each component to perform its specific function - the protrusions and recesses handle rotation prevention, while the shaft and head manage the fastening operation, resulting in a more reliable overall system
Solution Approach 2:
The insert and planar part are designed with complementary geometric features (protrusions and recesses) that automatically engage to prevent rotation. This self-locking mechanism eliminates the need for additional anti-loosening devices like toothed washers, as the structure itself provides the anti-rotation function
2Reliability
If anti-loosening devices like toothed washers are used, then loosening is prevented, but the device becomes heavy and bulky
Solution Approach 1:
The anti-loosening function is extracted from separate anti-loosening devices (like toothed washers) and integrated directly into the insert and planar part structures themselves. The protrusions and recesses are built-in features that provide anti-rotation capability without requiring additional components, thereby reducing overall system weight
Solution Approach 2:
Multiple functions are merged into fewer components. The insert serves both as a structural element and as the anti-rotation mechanism through its protrusions. The planar part combines the fastening surface with the anti-rotation recesses. This merging eliminates the need for separate anti-loosening devices, reducing weight and complexity
3Reliability
If U-shaped fork with profiled sections is used, then anti-loosening is achieved, but the device complexity and space requirements increase
Solution Approach 1:
The complex U-shaped fork structure with profiled sections is replaced by extracting only the essential anti-rotation function and implementing it through simple geometric features (protrusions and recesses) on the insert and planar part. This extraction eliminates unnecessary structural complexity while maintaining the anti-loosening capability
Solution Approach 2:
Instead of using a complex external fork structure to prevent rotation, the invention inverts the approach by designing the insert and planar part with complementary geometric features that inherently prevent rotation through their interlocking shapes. This inversion simplifies the overall structure by eliminating the need for complex external restraining mechanisms
Data Source
AI summary
The invention concerns a device for securing an insert in a structure having a first opening, the insert having a principal body (20) inserted in the first opening, the body (20) having a second opening having a principal axis, the device including a shaft (23) designed to pass through the second opening and at least one detachable or non-detachable head (24, 42).According to the invention, this device includes at least one roughly planar part (25, 26, 43) having a third opening, the part being designed to be positioned on an outer face of the structure (21, 22) so that the third opening is centered on the second opening for the passage of the shaft (23), the part (25, 26, 43) locking the insert in the first opening, a system for blocking the part (25, 26, 43) from rotating relative to the principal body (20), and an element for joining the head onto the part (25, 26, 43) for locking the head onto the part, the head being designed to be supported against the part (25, 26, 43) to secure the part against the outer surface.