Removable Mower Cutting Attachments for Low-Waste Blade Maintenance
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Solution Overview
Problem
Traditional lawn mower blades are constructed from a single piece of metal, leading to waste due to the need for entire blade replacement when cutting surfaces become dull, and require time-consuming blade changes for different cutting tasks.
Innovation Solution
A mower blade assembly with removable cutting attachments and a central frame that allows for quick replacement and customization of cutting surfaces, including interchangeable cutting attachments and a cleaning brush for simultaneous mowing and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If traditional single-piece metal blades are used, then structural strength and simplicity are maintained, but the entire blade must be replaced when cutting surfaces become dull, causing material waste and increased cost
Solution Approach 1:
The blade is divided into a central frame and separate cutting attachments. The central frame remains intact while only the cutting attachments (which constitute about 30% of the blade length) need to be replaced when dull, significantly reducing material waste compared to replacing the entire blade.
Solution Approach 2:
The cutting surfaces are extracted as separate removable attachments from the main blade structure. This allows the cutting attachments to be removed and replaced independently from the central frame, enabling selective replacement of only the worn components.
2Adaptability or versatility
If different blade types are used for different cutting tasks, then versatility is improved, but blade changes require specialized tools and time-consuming procedures
Solution Approach 1:
The blade system transitions from static, permanently attached blades to dynamic, easily interchangeable cutting attachments. The removable design with simple fastening mechanisms allows workers to quickly change between different cutting attachment types in the field without specialized tools, making the system adaptable to different cutting tasks while minimizing downtime.
3Reliability
If the entire blade is replaced when cutting surfaces become dull, then cutting performance is restored, but cost and waste increase significantly
Solution Approach 1:
The blade system is segmented into a reusable central frame and replaceable cutting attachments. Only the cutting attachments (approximately 30% of total blade length) need to be replaced when dull, while the central frame continues to serve, dramatically reducing the amount of material that must be discarded.
Solution Approach 2:
The design enables selective discarding of only the worn cutting attachments while recovering and reusing the central frame. This partial replacement strategy restores cutting performance without the need to discard the entire blade, reducing waste and replacement costs.
Data Source
AI summary
A mower blade device includes an elongated central frame having a top surface, a bottom surface, a first end and a second end. A spindle bolt hole is positioned along the center of the frame for connecting the frame to a lawn mower. A pair of cutting attachments are connected onto the first and second ends of the frame. Each of the cutting attachments including a leading edge having a sharpened cutting surface. The first and second cutting attachments can include identical shaped and sized cutting surfaces or dissimilar shaped and sized cutting surfaces. A cleaning brush attachment includes an elongated bracket and an n-shaped frame having a plurality of bristles extending outward therefrom. The bracket is removably connected to the bottom end of the central frame to permit the bristles to clean the blade housing of a lawn mower to which the device is connected.