U-Shaped Weed Extraction Tool with Serrated Blades
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Solution Overview
Problem
Existing weed extraction tools are ineffective in removing the root system of plants and prone to breakage due to high torque when rotating underground, as they lack durability and reliable blade arrangements.
Innovation Solution
A weed extraction tool with parallel blades formed from a single piece of metal, bent into a U-shape and welded to the handle, featuring serrated edges and deep notches for enhanced cutting and extraction capabilities, along with a plunger system for removing the plant from the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If blades are separately attached to the handle, then the device is easier to manufacture and assemble, but the blades are prone to breakage under high torque when rotating underground
Solution Approach 1:
The patent merges the handle and blades into a single integrated component formed from one piece of metal. The handle is bent into a U-shape with blades extending from each end, eliminating separate attachment points and creating a monolithic structure that resists breakage under high torque while simplifying the overall construction.
2Ease of manufacture
If simple blade design is used, then the device is easier to manufacture, but it is ineffective in cutting and removing the root system of plants
Solution Approach 1:
The patent applies local quality by adding serrations only to the cutting edges of the blades while keeping the rest of the blade structure simple and monolithic. This provides enhanced cutting capability for root removal at the critical contact points without complicating the overall manufacturing process.
3Reliability
If conventional blade arrangement is used, then the device structure is simpler, but it is unreliable and breaks under high torque when rotating underground
Solution Approach 1:
The patent combines the handle and blades into a single integrated component formed from one piece of metal. The handle is bent into a U-shape with blades extending from each end, eliminating separate attachment points and creating a monolithic structure that resists breakage under high torque.
Solution Approach 2:
The patent employs curvature by bending the handle into a U-shape, which distributes stress more effectively during rotation compared to straight rigid structures. This curved configuration enhances the device's ability to withstand high torque without breaking.
4Productivity
If blades without notches are used, then the manufacturing is simpler, but the extraction of the undesired plant from the ground is less effective
Solution Approach 1:
The patent applies local quality by adding notches only at specific locations on the blade edges where they are needed for plant extraction, rather than modifying the entire blade structure. This provides enhanced extraction capability at critical points while keeping the overall manufacturing process relatively simple.
Data Source
AI summary
A weed extraction tool includes an actuator having two parallel blades formed from a single piece bent into a u-shape. The blades have serrated leading edges and a deep notch in the upper third of the blade trisection above the serrations to facilitate extraction of undesired plants.