Indexing Skate Blade Sharpener for Uniform Stone Wear
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Solution Overview
Problem
Conventional ice skate sharpening methods using grinding machines or handheld tools result in excessive blade sharpness, reduced blade life, and increased costs due to uneven wear and frequent tool replacement.
Innovation Solution
A hand-operated ice skate sharpening tool with a cylindrical sharpening stone that automatically increments its rotation with each stroke, providing a more uniform wear pattern and reducing user intervention, allowing for manual rotation and easy replacement or cleaning of the stone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a handheld sharpening tool with a manual stone is used, then the tool is simple and easy to manufacture, but the stone wears unevenly and has a shorter useful life due to lack of precision in manual rotation
Solution Approach 1:
The sharpening stone is designed to automatically rotate itself during the sharpening process through a cam mechanism. As the user moves the tool back and forth along the blade, the cam converts the linear motion into rotational motion of the stone, ensuring uniform wear distribution across the entire stone surface without requiring manual intervention.
Solution Approach 2:
The stone is mounted on a rotating mechanism with a cam follower that converts the reciprocating linear motion of the tool into continuous rotational motion of the stone. This dynamic mechanism ensures the stone rotates uniformly during each sharpening stroke, distributing wear evenly and extending the stone's useful life.
2Productivity
If a conventional grinding machine is used, then sharpening speed is high, but the blade loses material quickly and useful life is reduced
Solution Approach 1:
The invention uses an affordable handheld sharpening tool with a replaceable sharpening stone instead of expensive grinding machines. The stone is designed to be economically replaceable, providing a cost-effective alternative that preserves blade material while maintaining sharpening effectiveness.
Solution Approach 2:
The sharpening stone applies gradual, incremental material removal through repeated light strokes rather than aggressive grinding. This partial action approach slowly sharpens the blade over multiple uses, removing minimal material each time and thereby extending the overall useful life of the blade.
3Device complexity
If a handheld sharpening tool with manual stone rotation is used, then the tool structure is simple, but the sharpening pattern is uneven and precision is low
Solution Approach 1:
The cam mechanism automatically rotates the stone during use, eliminating the need for manual rotation by the user. This self-rotating mechanism ensures consistent, uniform contact between the stone and blade throughout the sharpening stroke, producing an even sharpening pattern without adding significant complexity to the tool.
Solution Approach 2:
The cam-follower mechanism dynamically converts the user's linear back-and-forth motion into precise rotational motion of the stone. This mechanical linkage ensures the stone maintains consistent rotational speed and contact pressure throughout each stroke, achieving uniform sharpening precision through simple mechanical means.
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
The tool prolongs skate blade life, reduces sharpening costs, and minimizes the risk of injury by maintaining optimal blade sharpness while offering a more precise and cost-effective sharpening process.
Implementation Method 1
a first gear of the second set of gears is engaged with a second gear. Each change of longitudinal direction causes the non-engaged stone gear to shift to move towards the non-engaged body gear set, which are one half pitch different, thereby forcing an incremental rotation
Data Source
AI summary
A handheld skate blade sharpening tool that has an automatically indexing, rotating sharpening stone that matches the concaved profile of the skate blade retained within a two-piece body member. Screws hold the two-piece body member together to keep the round sharpening stone sized to match the desired concave profile. The sharpening stone will remove metal to match the shape of the stone each time the sharpener is moved back and forth along the blade. The sharpening stone has gears on each end of the stone that match the gears inside the two-piece body. As the tool is moved along the skate blade, the sharpening stone will incrementally rotate within the body when the direction is changed in the reciprocating motion by the user's back and for movement.