Bushing Removal Tool With Saw Guide For Rotorcraft Blades
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Solution Overview
Problem
Conventional methods for removing bushings from clevis joints in rotorcraft blades often require severing the bushing and can be hazardous due to limited space and the risk of contacting sensitive components, necessitating improved tools and techniques for safe and efficient disassembly.
Innovation Solution
A bushing removal tool with a saw slot and guide system that allows precise cutting of exposed bushing portions without contacting the clevis or blade cuff, utilizing a saw guide and slider bar to position the saw blade accurately and securely, enabling safe removal of bushings from rotor blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to remove bushings by severing the exposed portion, then the bushing can be removed, but the risk of contacting the clevis or blade cuff increases and damage may occur
Solution Approach 1:
A guide tool acts as an intermediary between the saw blade and the workpiece, providing a defined cutting plane that physically separates the saw blade's path from the clevis and blade cuff. This intermediary structure ensures the saw blade cuts the bushing without contacting sensitive components.
Solution Approach 2:
The harmful factor (risk of contact) is eliminated by extracting the saw blade from direct contact with the workpiece. The guide tool extracts and isolates the cutting action to a specific plane that does not intersect with the clevis or blade cuff, removing the source of potential damage.
2Manufacturing precision
If the saw blade is positioned close to the workpiece for precise cutting, then cutting accuracy improves, but the risk of contacting the clevis or blade cuff increases
Solution Approach 1:
The solution moves the cutting operation to a different spatial dimension by establishing a cutting plane that is offset from the workpiece surface. The guide tool creates a three-dimensional separation where the saw blade operates in a plane parallel to but spaced from the workpiece, achieving precision without contact risk.
3Object-affected harmful factors
If a guide system is added to position the saw blade accurately, then the risk of damage is reduced, but the device complexity increases
Solution Approach 1:
The guide tool is segmented into distinct functional components: a body portion that interfaces with the workpiece, a saw slot that defines the cutting path, and reference features that ensure proper positioning. This segmentation allows each component to perform its specific function while keeping the overall design manageable.
Solution Approach 2:
The guide tool body serves multiple functions simultaneously: it positions the saw blade, defines the cutting plane, provides reference for alignment, and protects the workpiece. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
Data Source
AI summary
A tool for removing a bushing from a workpiece includes a tool body, a first reference, and a second reference for positioning the tool body on a workpiece. A saw slot is defined through the tool body to provide access to the workpiece for a saw blade. A saw guide is proximate the saw slot, the saw guide arranged to position a saw blade in a cutting plane spaced apart from the workpiece for removing a segment of a bushing fixed to the workpiece relative to the first and second references.