Helicopter Blade Clamp With Hinge And Flexible Liners
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Solution Overview
Problem
Current helicopter blade clamps are inadequate for securely and safely handling wide-chord composite blades, as they are fragile, require sensitive clamping, and often damage the delicate trim tabs or fail to evenly distribute clamping force, necessitating heavy and cumbersome designs that require multiple personnel for operation and are not universally adaptable.
Innovation Solution
A lightweight, adaptable blade clamp featuring flexible liners and a hinge mechanism that evenly distributes clamping force across the blade width, with a pivot hoist bar for easy handling and adjustable attachment points to accommodate different blade centers of gravity, and a flexible trim tab guard to prevent damage to sensitive areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If known blade clamps are used to avoid contact with trim tabs, then trim tabs are protected, but the blade is not fully secured and may be dropped during handling
Solution Approach 1:
The clamp is divided into two separate clamping parts: a first clamping part that contacts the blade body away from trim tabs, and a second clamping part that can contact the blade near the trailing edge. This segmentation allows different portions of the blade to be secured without the single clamp mechanism needing to contact sensitive trim tabs directly
Solution Approach 2:
A safety strap serves as an intermediary element that provides additional security. The strap can be engaged to work with the clamping parts to fully secure the blade during handling, distributing the securing function across multiple elements rather than relying on a single clamp contact point
2Reliability
If known blade clamps are made heavy and cumbersome to ensure security, then blade handling reliability improves, but ease of operation deteriorates requiring multiple personnel
Solution Approach 1:
The clamp incorporates a hinge mechanism that allows the clamping parts to move dynamically during operation. The hinge enables the clamp to open and close smoothly, and allows adjustment during the clamping process, making operation easier while maintaining security through the coordinated action of multiple clamping parts
Solution Approach 2:
The clamp design with multiple clamping parts and adjustable features provides multi-functionality, allowing a single operator to handle various blade configurations and security requirements without needing multiple specialized devices or personnel
3Manufacturing precision
If known blade clamps are designed for specific blade types, then clamping precision improves, but adaptability to different helicopter models deteriorates
Solution Approach 1:
The clamp is designed with universal features including adjustable hinge positions, multiple clamping parts that can be positioned at different locations, and a safety strap that can be configured for various blade types. This allows the same clamp design to adapt to different blade widths, trim tab configurations, and center of gravity locations across various helicopter models while maintaining precise clamping through proper positioning
4Reliability
If known blade clamps require multiple personnel for operation, then blade security improves, but productivity deteriorates due to extended removal time
Solution Approach 1:
The hinge mechanism enables smooth, controlled movement of clamping parts that can be operated by a single person. The dynamic design allows for easy engagement and disengagement of clamping parts, reducing the time required for blade removal while maintaining security through the coordinated action of multiple clamping elements
Solution Approach 2:
The clamp design with its hinge mechanism and multiple clamping parts allows the system to self-adjust and self-secure during operation. The hinge enables automatic positioning of clamping parts as the blade is inserted or removed, reducing the need for multiple operators to manually position and secure each element
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
Enables single-person operation, secure clamping without damaging trim tabs, and universal adaptability across various helicopter models, ensuring safe and efficient handling and storage of helicopter blades while maintaining structural integrity.
Implementation Method 1
The first flexible liner (2) is attachable to the first clamping part (1)... The second flexible liner (4) is attachable to the second clamping part (3)... such that the helicopter blade can be clamped between the first and second flexible liners
Implementation Method 2
The hinge mechanism (5) pivots the first clamping part (1) and the first flexible liner (2) with respect to the second clamping part (3) and the second flexible liner (4)
Data Source
AI summary
A blade clamp for a helicopter blade having a width and leading and trailing edges includes a first clamping part, a first flexible liner attachable to the first clamping part, a second clamping part, a second flexible liner attachable to the second clamping part, a hinge mechanism to pivot the first clamping part and the first flexible liner with respect to the second clamping part and the second flexible liner and a connector provided opposite to the hinge mechanism. The flexible liners evenly distribute clamping force upon the blade clamp to prevent damage to the blade. The hinge mechanism allows the first and second clamping parts to open wide enough to safely and easily accommodate a helicopter blade during removal and installation of the blade.