Rotatable Blade Holder for Automatic Lawnmower Grinding
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Solution Overview
Problem
Conventional blade grinders struggle to automatically grind blades with complex or curved cutting edges, as they require special guidance and manual adjustment for each side, limiting their ability to handle blades with opposing cutting edges efficiently.
Innovation Solution
A blade grinder with a rotatable blade holder mounted on two perpendicular axes, allowing the grindstone to move along perpendicular lines, enabling precise and rapid grinding of blades with complex cutting edges by rotating the holder and adjusting the grindstone's position, which simplifies the machine structure and automates the grinding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional blade grinders are used to grind blades with complex or curved cutting edges, then the grinding process requires special guidance and manual adjustment, but this increases the complexity of operation and reduces productivity
Solution Approach 1:
The blade holder is designed with dynamic rotational capability around a vertical axis, allowing the blade to be automatically repositioned between cutting edges during the grinding process. This dynamic adjustment eliminates manual intervention and enables continuous automated grinding of both sides of the blade, significantly improving productivity while maintaining ease of operation
Solution Approach 2:
The blade holder serves multiple functions: it secures the blade, positions it for grinding, and automatically rotates it to present both cutting edges to the grindstone. This multi-functionality consolidates what would otherwise require separate manual operations into a single automated device, reducing operational complexity while enhancing productivity
2Extent of automation
If the blade holder is mounted on two perpendicular axes with rotational capability, then blades with opposing cutting edges can be ground automatically, but this increases the device complexity
Solution Approach 1:
The positioning system is segmented into two independent perpendicular axes: a horizontal axis for positioning the blade holder laterally and a vertical axis for rotating the blade holder to present different cutting edges. This segmentation allows each axis to perform a specific function independently, achieving high automation while keeping the overall structure manageable and maintainable
Solution Approach 2:
The blade holder is positioned in three-dimensional space using two perpendicular axes, adding spatial dimensions to the grinding process. The horizontal axis provides lateral positioning capability while the vertical axis enables rotation, creating a multi-dimensional automated positioning system that achieves high automation without excessive complexity
3Manufacturing precision
If the grindstone is moved along perpendicular lines while the blade holder rotates on two axes, then precise grinding of complex cutting edges is achieved, but this increases the device complexity
Solution Approach 1:
The movement of the grindstone along perpendicular lines is merged with the rotational movement of the blade holder on two axes to create a coordinated multi-axis system. This merging of movements allows the system to achieve precise grinding of complex cutting edge contours by combining lateral grindstone movement with blade holder rotation, maintaining manufacturing precision while managing device complexity through integrated control
Data Source
AI summary
Disclosed is a blade grinder comprising a blade holder that is mounted so as to be rotatable about a horizontal shaft which is mounted so as to be rotatable about a vertical axis, thus allowing the blade to be optimally adjusted relative to a grinding disk. The grinding disk can preferably be vertically and horizontally moved using spindles. This creates a simple design allowing a lawnmower blade to be ground in a fully automatic manner.