Tail Rotor Cross-Head Verification Tool
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Solution Overview
Problem
Conventional methods for aligning and verifying the rigging of rotorcraft tail rotor systems are sensitive, time-consuming, and prone to errors due to mechanical and electrical tolerances, requiring precise adjustments that can take hours or days to complete accurately.
Innovation Solution
A verification tool with maximum and minimum surfaces is used to determine the correct positioning of the tail rotor cross-head and yoke, allowing for efficient and accurate alignment of the actuator output tube, enabling quick verification and adjustment of the tail rotor rigging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to align and verify tail rotor rigging, then measurement precision can be maintained, but the time required for rigging verification and adjustment increases significantly
Solution Approach 1:
The verification tool is pre-configured with maximum and minimum surface positions that correspond to the correct positioning tolerances for the cross-head and yoke. By establishing these reference positions beforehand, the tool enables direct verification without requiring time-consuming iterative measurements and adjustments, thus reducing rigging verification time while maintaining precision
Solution Approach 2:
The verification tool acts as an intermediary device between the cross-head and yoke components. It provides a physical reference framework with marked maximum and minimum surfaces that mediates the alignment process, allowing technicians to quickly determine whether components are correctly positioned without performing complex measurements, thereby reducing verification time while preserving measurement precision
2Manufacturing precision
If conventional rigging methods are used, then accurate positioning can be achieved, but the complexity of the adjustment process increases
Solution Approach 1:
The verification tool segments the positioning verification into distinct, easily identifiable reference points (maximum surface and minimum surface positions). This segmentation transforms a complex continuous positioning problem into discrete, checkable positions, simplifying the adjustment process while maintaining positioning accuracy
Solution Approach 2:
The verification tool uses visual markings (such as paint marks or colored indicators) on the maximum and minimum surfaces to provide immediate visual feedback on component positioning. This visual indication system simplifies the complex adjustment process by making it intuitive and easy to understand, while ensuring accurate component positioning through the marked reference positions
3Measurement precision
If sensitive equipment is used for measurement, then measurement precision is maintained, but the ease of operation decreases
Solution Approach 1:
The verification tool is designed to be self-explanatory and self-verifying, with clearly marked maximum and minimum surfaces that automatically indicate whether positioning is correct. The tool eliminates the need for operators to understand or operate complex sensitive measurement equipment, making the verification process easy to perform while maintaining measurement precision through the built-in reference positions
Data Source
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Figure 3A~3
AI summary
A device (100; 200) to verify tail rotor cross-head (400) positioning is disclosed. The device (100; 200) comprises a first portion (110; 210) and a second portion (120; 220). The second portion (120; 220) may be adjoined to the first portion (110; 210) and comprises maximum and minimum surfaces (122, 124; 222, 224) configured to determine whether a yoke-measuring surface (310) of a tail rotor yoke (300) may be positioned between respective geometric planes of the maximum and minimum surfaces (122, 124; 222, 224).