Keyed Socket Wrench Assembly for Torque and Position Verification
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Solution Overview
Problem
Conventional torque wrenches fail to ensure that fasteners for aircraft body panels are properly tightened to both specified torque and rotational position, which is crucial for maintaining secure closure during high-speed travel.
Innovation Solution
A wrench assembly comprising a keyed socket head and adapter body that aligns with the fastener and body panel geometry, ensuring the fastener is tightened to a specified torque and rotational position, indicated by a visual alignment of reference surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional torque wrench is used to tighten fasteners, then torque can be applied, but the rotational position cannot be verified
Solution Approach 1:
The patent combines a torque wrench mechanism with a keyed socket head and adapter body into a single integrated wrench assembly. The adapter body connects the torque wrench to the keyed socket head, merging torque application and rotational position verification functions into one device. This allows simultaneous verification of both torque and rotational position without requiring separate tools.
Solution Approach 2:
The keyed socket head acts as an intermediary between the torque wrench and the fastener. It features an asymmetrical internal socket that mates with the fastener head in only one rotational orientation, and includes an external rotational alignment key that interfaces with the adapter body. This intermediary component transfers both torque and rotational position information from the fastener to the wrench mechanism.
2Productivity
If multiple separate tools are used to verify torque and rotational position, then measurement accuracy can be maintained, but operation time increases
Solution Approach 1:
The wrench assembly merges torque measurement and rotational position verification into a single integrated tool. The torque wrench mechanism and the keyed socket head with alignment features work together simultaneously, allowing maintenance personnel to verify both parameters in one operation rather than using multiple separate tools sequentially.
Solution Approach 2:
The keyed socket head is pre-configured with an asymmetrical internal socket and external rotational alignment key that automatically establish the correct rotational position when engaged with the fastener. This preliminary configuration ensures that when torque is applied, the rotational position is already predetermined and verifiable through the adapter body's reference surface alignment with the panel.
Data Source
AI summary
A wrench assembly tightens a fastener for a latch mechanism of an openable body panel to a specified torque at a specified rotational position. A keyed socket head couples to a head of the fastener in one and only one rotational orientation. An adapter body connects a torque wrench to the keyed socket head. The torque wrench rotates the wrench assembly to turn the fastener via the keyed socket head. The adapter body defines a wrench reference surface that aligns with a panel reference surface of the openable body panel when the fastener is tightened to the specified rotational position. The torque wrench indicates when the wrench assembly applies the specified torque on the fastener.


