Electromotive Hoe Blade Design for Wear Reduction
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Solution Overview
Problem
Existing electromotive hoes face issues with blade breakage due to stones, rapid wear, and safety accidents from high-viscosity mud and uneven ground, leading to reduced efficiency and increased maintenance costs.
Innovation Solution
The design features a hoe blade with a gradually shortened protruding length for uniform ground contact, spaced blades to discharge foreign substances, convex blade portions for effective scratching, and a rounded edge to prevent sticking, along with a rotating plate structure that minimizes mud attachment and reduces fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hoe blade has a uniform protruding length, then the ground contact is uniform, but the work efficiency is reduced and the blade wears out rapidly
Solution Approach 1:
The hoe blade is designed with varying protruding lengths, where the center portion protrudes more than the end portions. This local quality variation allows the central area to perform the primary cutting work while the end portions maintain ground contact for stability, thereby improving work efficiency without causing uniform wear across the entire blade
2Area of moving object
If the hoe blade is made long to increase working area, then the effective work area is increased, but the blade is easily broken by stones and safety accidents occur
Solution Approach 1:
The hoe blade is segmented into multiple portions with different functions: the central portion with greater protruding length performs the main cutting work, while the end portions with shorter lengths provide ground contact and stability. This segmentation reduces the overall blade length requirement while maintaining effective work area, and distributes the mechanical stress to prevent breakage from stone impacts
3Force
If the load is concentrated at one point of the blade, then the cutting force is intensified, but the blade wears out rapidly
Solution Approach 1:
The blade design concentrates the protruding length (and thus the cutting force) at the central portion where it is most needed for effective weed removal, while the end portions have shorter lengths that contact the ground for stability. This local concentration of force maintains cutting effectiveness while distributing the wear across different blade regions over time, extending service life
Data Source
AI summary
An electromotive hoe includes a working rod which has a predetermined length, and has a power source provided at one side thereof and a shaft protruding from the other side thereof so that a rotational force of the power source is transmitted; an upper cover which has a disc shape and has a first through hole formed in the central portion so that the shaft is inserted; a rotating plate which has a plate-like structure, and has a second through hole formed in the central portion so that the shaft is inserted, and is coupled to an end portion of the shaft by a fastening means to be in close contact with a lower surface of the upper cover; and a hoe blade formed to protrude vertically along the edge of the rotating plate.