Roller-Driven Sharpening Disc With Adjustable Grinding Speed
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Solution Overview
Problem
Existing grinding and polishing devices for cutting tools, such as household knives, lack the ability to adjust the grinding effect to individual requirements and achieve uniformity in the process.
Innovation Solution
A device with a handle, a rotatable roller, and a rotatable disc that can operate at different rotational speeds relative to each other, allowing for adjustable gear ratios and independent or coupled rotations, enhancing the grinding or polishing effect based on specific needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the disc rotates at the same speed as the roller, then the device structure is simple, but the grinding effect cannot be adjusted to individual requirements
Solution Approach 1:
The patent applies dynamics by making the rotational speed of the disc variable relative to the roller through adjustable transmission mechanisms (gears, belts, or friction contact). This allows the grinding effect to be dynamically adjusted to individual requirements while maintaining a relatively simple overall device structure.
2Productivity
If the disc rotates faster than the roller, then the grinding and polishing effect is enhanced, but the transmission mechanism becomes more complex
Solution Approach 1:
The patent changes the speed parameter of the disc relative to the roller by providing multiple transmission ratio options (through changeable gears, adjustable belts, or variable friction contact). This enables enhanced grinding and polishing efficiency when needed, while allowing the user to select simpler transmission configurations when lower speeds suffice.
3Reliability
If the disc and roller are mechanically coupled, then the transmission is reliable, but the disc rotation cannot be independently controlled
Solution Approach 1:
The patent transitions from a fixed mechanical coupling to a dynamic transmission system where the disc can be coupled to the roller through adjustable mechanisms (gears, belts, or friction contact). This provides both reliable power transmission and the flexibility to independently control disc rotation speed and direction according to different grinding requirements.
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 device achieves a significantly improved grinding or polishing effect by allowing for adjustable rotational speeds and uniformity, with the disc rotating faster or slower than the roller, or in the same/opposite direction, resulting in a precise and efficient cutting edge refinement.
Implementation Method 1
the roller—rotating relative to the handle—rolls on the base
Implementation Method 2
the disc grinds the applied cutting edge due to its rotation
Implementation Method 3
the disc grinds the applied cutting edge due to its rotation
Data Source
AI summary
A device for grinding and/or polishing a cutting edge of a cutting tool. The device includes a handle, at least one roller rotatable relative to the handle, and at least one disc that is rotatable relative to the handle for grinding and/or polishing the cutting edge of the cutting tool. The device can be moved over a substrate by exerting force on the handle so that the roller, which is rotating relative to the handle, rolls on the substrate and the disc can be set in rotation. The disc may be rotatable at a different rotational speed/angular velocity to the roller.