Circular Knife Sharpening Device With Rotating Abrasive Wheel
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Solution Overview
Problem
Conventional circular knives become blunt over time and require tedious, uneven sharpening due to their circular cutting edge, necessitating continuous rotation for sharpening.
Innovation Solution
A knife sharpening device comprising a wheel member with a funnel-shaped sharpening portion, a retaining member, and a connecting member that securely engage with the circular blades, allowing for even sharpening by fixing the blades in place and rotating the wheel member to utilize a circular abrasive piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the circular knife is rotated continuously during sharpening, then the entire blade can be sharpened, but the operation becomes tedious and the sharpening effect becomes uneven
Solution Approach 1:
Instead of rotating the circular blade during sharpening, the patent inverts the approach by rotating the wheel member with the abrasive piece while keeping the blade stationary. This inversion resolves the contradiction by eliminating the need for continuous blade rotation, simplifying the operation while ensuring uniform sharpening through the rotational motion of the wheel member that brings different portions of the abrasive surface into contact with the blade edge
2Ease of operation
If the circular blade is fixed in place during sharpening, then the sharpening operation is simplified, but the blade cannot be sharpened evenly across its entire circumference
Solution Approach 1:
The patent introduces rotational motion in a different dimension by rotating the wheel member around the stationary blade. This dimensional change allows the sharpening process to achieve uniform coverage of the entire blade circumference without requiring the blade itself to rotate, thus maintaining operational simplicity while ensuring sharpening uniformity through the alternative rotational path provided by the wheel member
3Reliability
If the wheel member, retaining member, and connecting member are securely connected, then the sharpening process becomes stable, but the device structure becomes more complex
Solution Approach 1:
The patent divides the device into distinct functional segments: the wheel member containing the abrasive piece, the retaining member for securing the circular blade, and the connecting member linking them together. This segmentation allows each component to perform its specific function reliably while maintaining a relatively simple overall structure, as each segment can be independently designed and assembled without requiring complex integration
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 annular and even sharpening of circular blades, reducing the complexity and inefficiency of conventional sharpening methods by ensuring consistent contact with the abrasive surface.
Implementation Method 1
a circular abrasive piece arranged around an inner side thereof
Implementation Method 2
the sharpening portion including a circular abrasive piece arranged around an inner side thereof
Data Source
AI summary
A knife sharpening device of a circular knife contains a wheel member including a sharpening portion disposed therein, the sharpening portion including an abrasive piece mounted therearound, an annular loop with a hole mounted on a central portion thereof, and a peripheral wheel formed therearound; a retaining member connected with one side of the wheel member and including a first rib disposed thereon, an abutting post with a first limiting block extending therefrom, the first limiting block including an insertion extending therefrom, the abutting post including a biasing projection proximate to the abutting post; a connecting member connected on another side of the wheel member and including a second rib disposed thereon, a second limiting block with an opening and plural locking tabs fixed on a central portion of an inner side thereof, the connecting member including a contacting peg arranged adjacent to an inner side thereof.