Paddy Field Weeding Machine for Pulling, Chopping, and Burying Weeds
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Solution Overview
Problem
Existing weeding technologies in paddy fields, such as blade-type and rake-tooth devices, fail to thoroughly remove weeds due to their regrowth, necessitating a mechanized solution that can effectively pull out and kill weeds without chemical herbicides.
Innovation Solution
A weeding machine with weed collecting screws, spiral chopping knives, and bidirectional variable-pitch augers that pull out, chop, and bury weeds between rows and plants, ensuring thorough weeding and seedling retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual weeding is used, then weeding thoroughness is improved, but labor cost increases and efficiency decreases
Solution Approach 1:
The patent replaces manual mechanical weeding with an automated mechanical weeding system consisting of a weeding device mounted on a rice transplanter. The device uses rotating blades to mechanically cut weeds at the soil surface level, substituting human labor with automated mechanical operation that maintains weeding thoroughness while dramatically improving efficiency.
Solution Approach 2:
The weeding device is integrated with the rice transplanter, allowing the same machine to perform both rice transplanting and weeding operations. This multi-functionality approach enables the equipment to accomplish multiple agricultural tasks, improving overall productivity without requiring separate manual operations for each task.
2Productivity
If chemical herbicides are used, then weeding efficiency is improved, but environmental pollution increases
Solution Approach 1:
The patent replaces chemical herbicide application with a mechanical weeding system that uses rotating blades to physically cut weeds. This mechanical approach achieves efficient weed control without introducing chemical substances into the environment, thereby eliminating the pollution and residue problems associated with chemical herbicides.
3Extent of automation
If blade-type or rake-tooth type weeding devices are used, then mechanization is improved, but weeding effectiveness deteriorates due to weed regrowth
Solution Approach 1:
The patent changes the operational parameter of the weeding device by positioning the rotating blades to cut weeds at the soil surface level rather than pulling them out. This parameter change prevents weed regrowth by severing the weed at its base, thereby maintaining both mechanization and weeding effectiveness.
Solution Approach 2:
The weeding device uses multiple rotating blades arranged in a specific configuration to segment the weeding action across different locations. This segmentation allows simultaneous weeding across multiple rows while ensuring each weed is effectively cut at the soil surface, maintaining overall weeding effectiveness in the mechanized system.
Data Source
AI summary
A weeding machine and a weeding method for seedlings in a paddy field are disclosed. The weeding machine includes a paddy field power chassis, a lifting hydraulic cylinder, a parallelogram suspension frame, a weeding frame, a transmission assembly, and weeding units. The paddy field power chassis vertically adjusts the working depth of the weeding machine through the parallelogram suspension frame and the lifting hydraulic cylinder. The power is transmitted to the weeding units by the transmission assembly. The weeding units are used for pulling out weeds between rows and feeding the weeds to weed chopping channels. Spiral weed chopping knives are used for chopping the weeds and conveying the weeds to feeding channels. Bidirectional variable-pitch augers are used for conveying the chopped weeds to discharge openings of the feeding channels under pressure and discharging the chopped weeds for burying weeds between plants.