C-Shaped Elastic Blade Changing Tool for Hub Blades
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Solution Overview
Problem
Existing blade changing tools are prone to causing damage to the cutting edge of hub blades during installation or removal due to unstable holding mechanisms and potential contact with the sharp edges, and they do not effectively support hub blades with narrow circular hubs.
Innovation Solution
A C-shaped elastic cylindrical blade changing tool with a holding groove and grip portions designed to securely hold the circular hub of the cutting blade, preventing finger contact with the cutting edge and ensuring stable operation, featuring thumb and three-finger receiving portions with stoppers to manage the blade's circular hub safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hub blade with a thin cutting edge is directly held by an operator's hand, then the cutting blade can be easily manipulated, but the cutting blade may be easily damaged due to its brittleness
Solution Approach 1:
A blade changing tool is introduced as an intermediary device between the operator's hand and the hub blade. The tool includes a holding portion with a C-shaped elastic cylindrical body that securely holds the circular hub of the blade, allowing the operator to manipulate the blade without direct hand contact. This mediator protects the brittle cutting edge from damage while enabling easy operation.
2Ease of operation
If the circular hub of the circular base is narrow in width or the fingers are necessarily put on the circular hub near the cutting edge, then the blade can be held, but the cutting edge may be erroneously broken by the fingers or the fingers may be erroneously cut by the cutting edge
Solution Approach 1:
The blade changing tool serves as an intermediary that eliminates direct contact between fingers and the cutting edge. The C-shaped elastic cylindrical body with holding groove securely grasps the circular hub, positioning the blade for manipulation while keeping the operator's fingers at a safe distance from the sharp cutting edge, thus preventing both blade damage and finger injury.
Solution Approach 2:
The dangerous cutting edge is effectively 'taken out' of the interaction zone by using the tool's holding mechanism. The operator interacts only with the safe portions of the tool (grip portions), while the tool itself handles the blade including the dangerous cutting edge portion, extracting the hazard from the operator's direct contact path.
3Ease of operation
If a blade changing tool with a spring-based holding portion is used, then the blade can be held by the tool, but the blade holding portion may become unstable due to settling of the spring
Solution Approach 1:
The holding mechanism transitions from a spring-based elastic deformation system to an elastic material deformation system. The C-shaped elastic cylindrical body is made of elastic material that deforms to accommodate and hold the circular hub. This parameter change from mechanical spring elasticity to material elasticity eliminates the settling problem while maintaining the ability to securely hold the blade.
4Adaptability or versatility
If the degree of opening of the blade holding portion is not limited, then the tool can accommodate different blade sizes, but the tool may strike the blade in holding the blade, causing damage to the blade
Solution Approach 1:
The elastic cylindrical body is pre-formed with a specific curvature and dimensions that correspond to the circular hub of the blade. This preliminary design ensures that when the tool engages the blade, the holding groove properly surrounds the hub without excessive opening that could cause the tool to strike the blade. The pre-configured geometry provides both adaptability and protection.
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 easy and quick blade changes without damaging the cutting edge, providing a stable holding mechanism that prevents finger contact and tool-induced damage, ensuring the hub blade is securely managed during installation and removal.
Implementation Method 1
a C-shaped elastic cylindrical body including a cutout formed by cutting out a part of a circular cylinder
Data Source
AI summary
A blade changing tool for use in a cutting device including a chuck table for holding a workpiece and a cutting device including a blade mount for rotatably supporting a cutting blade for cutting the workpiece held by the chuck table. The blade changing tool includes a C-shaped elastic cylindrical body including a cutout formed by cutting out a part of a circular cylinder, a holding groove formed on the inner circumferential surface of the cylindrical body at one end portion thereof and adapted to surround a circular hub of the cutting blade, and a grip portion adapted to be gripped by an operator for making a change from an inoperative condition where the circular hub of the cutting blade is surrounded by the inner circumference of the cylindrical body to an operative condition where the circular hub is held by the inner circumference of the cylindrical body.