Shielded Trimmer Head With Vacuum Airflow for Cleaner Cutting
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Solution Overview
Problem
Existing trimmer heads with flexible trimmer lines and cutting blades suffer from environmental pollution due to non-biodegradable plastic waste, frequent line replacements, and potential damage to objects, while unshielded blades pose safety risks and inefficiencies in cutting performance.
Innovation Solution
A trimmer head design featuring a cutting blade shield with through-openings and a vacuuming air assembly that generates a vacuum flow to direct vegetation towards the cutting blade, utilizing a cutting blade with angled knives to enhance cutting efficiency and safety by incorporating a vacuuming air flow to collect cut vegetation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If flexible trimmer lines are used, then the trimmer can be used close to objects and materials, but worn or broken plastic pieces are wasted and accumulated on the ground, contributing to environmental pollution
Solution Approach 1:
The patent replaces disposable flexible trimmer lines with a durable metal cutting blade that can be reused multiple times. The blade is designed to withstand wear and can be replaced when dull or damaged, eliminating the continuous waste generation from broken plastic trimmer lines while maintaining the ability to trim close to objects
2Productivity
If unshielded cutting blades are used, then cutting efficiency is improved, but safety risks increase and objects may be damaged
Solution Approach 1:
The patent segments the cutting system into two functional parts: an unshielded cutting blade for efficient vegetation cutting and a protective shield for safety. The shield includes openings that allow vegetation to pass through to the blade while blocking direct exposure to the rotating blade, thus maintaining cutting efficiency while reducing safety risks
3Reliability
If trimmer lines are frequently replaced, then continuous cutting performance is maintained, but time and operational interruptions increase
Solution Approach 1:
The patent replaces the disposable trimmer line system with a durable metal cutting blade designed for long-term use. The blade maintains its cutting edge through proper material selection and geometry, requiring replacement only when significantly dull or damaged, thus eliminating frequent interruptions while maintaining reliable cutting performance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design improves cutting efficiency, reduces environmental waste, enhances safety by shielding the cutting blade, and minimizes damage to objects, while maintaining stable power and reducing noise levels.
Implementation Method 1
a vacuuming air assembly arranged in the housing (27) such that, in operation, a vacuuming air flow is generated and directed from said cutting blade shield openings (21) to an interior of the housing (27)
Data Source
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AI summary
The subject invention relates to a trimmer head for vegetation trimming and cutting machines, the trimmer head comprising a housing (27), a cutting blade (46), and a cutting blade shield (2) with a plurality of through-openings (21), characterized in that it further comprises a vacuuming air assembly arranged in the housing (27) such that, in operation, a vacuuming air flow is generated and directed from said cutting blade shield openings (21) to an interior of the housing (27). The invention belongs to the field of apparatus for trimming and cutting grass, small bush wood, hedges, weed and reed.