Rotating Comb Blade Weeding Mechanism
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Solution Overview
Problem
Existing weeding devices are cumbersome, complex, and unsuitable for home use, requiring operators to bend and strain, and their maintenance is not straightforward.
Innovation Solution
A weeding device with a comb blade unit rotating member, comprising a pair of rotational plates and comb blades that contact and separate to efficiently pull out weeds, utilizing a simple structure with a rotating unit that eliminates the need for additional motive force, allowing easy operation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a motor or engine is used as motive force, then weeding efficiency is improved, but device complexity and maintenance difficulty increase
Solution Approach 1:
The device uses the natural forward movement of the operator to rotate the comb blades through the guide plate mechanism, eliminating the need for external motors or engines. The system serves itself by converting the operator's walking motion directly into the rotational motion needed for weeding.
Solution Approach 2:
The patent replaces complex powered mechanical systems (motors, engines, transmissions) with a simple mechanical linkage system consisting of guide plates, protruding pieces, and comb blades that convert linear motion to rotational motion through pure mechanical means.
2Productivity
If complex mechanical structures are used, then weeding capability is improved, but ease of operation and maintenance deteriorate
Solution Approach 1:
The device is divided into simple, modular components: comb blades, guide plates, protruding pieces, and a rotating member. Each component has a single, clear function and can be easily assembled, operated, and maintained independently.
Solution Approach 2:
Instead of using a rotating mechanism to drive the comb blades through complex transmissions, the patent inverts the approach by having the linear guide plates drive the rotation through protruding pieces that engage with the rotating member, simplifying the mechanical path.
3Force
If additional motive force mechanisms are added, then weeding power is improved, but device complexity increases
Solution Approach 1:
The device generates its own rotational force through the mechanical interaction between the guide plates and protruding pieces, which convert the operator's forward movement into rotational motion of the comb blades, requiring no external power source.
Solution Approach 2:
The guide plates are designed to dynamically engage with the protruding pieces during operation, allowing the system to adapt to varying ground conditions and weed densities while maintaining effective weeding force through pure mechanical advantage.
Data Source
AI summary
A weeding device includes a comb blade unit including first and second comb bodies in which a plurality of comb blades are arranged on a coupling rod in a comb shape. Both ends of a plurality of the comb blade units are fastened on the same circle of the rotating center of a pair of rotating plates. The coupling rod of the first comb body and/or the second comb body is pressed toward the longitudinal direction to project a projection piece to the outside of the rotating plates. The projection piece is depressed by guide plates located on the outside of the rotating plates, and the comb blades are brought into contact with one another or come close to one another to sandwich the blades of grass that are growing therebetween, and that the sandwiched blades are pulled out along with further rotation of the rotating plates.