Replaceable Shovel Blade via Segmented Fastening
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Solution Overview
Problem
Shovel blades become dull due to wear and tear, leading to increased user exertion and eventually reach the end of their life cycle, necessitating disposal rather than replacement of the tool.
Innovation Solution
A digging tool design featuring a replaceable blade system, where different types of blades can be interchanged using a receiving plate with various fastening mechanisms, such as fasteners, clips, or hooks, allowing for secure attachment and easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the shovel blade is made as a fixed, integrated part of the tool, then the structural strength and simplicity are improved, but the blade cannot be replaced when dull, leading to complete tool disposal
Solution Approach 1:
The shovel is divided into separate components: a handle assembly and a blade assembly that can be independently replaced. The blade is detached from the handle through a receiving plate mechanism, allowing the blade to be replaced when dull while retaining the handle assembly.
Solution Approach 2:
The blade is designed to be discarded when dull and replaced with a fresh blade. The handle assembly and receiving plate are recovered and retained, eliminating the need to discard the entire tool. This extends the tool's lifespan by allowing blade replacement rather than complete tool disposal.
2Adaptability or versatility
If the blade is made replaceable with a complex fastening system, then blade replacement capability is improved, but the device complexity increases
Solution Approach 1:
The fastening system is segmented into discrete components: a receiving plate with openings, fasteners, and a blade with corresponding mounting features. This modular approach allows for straightforward assembly and disassembly without complex mechanisms.
Solution Approach 2:
The receiving plate serves multiple functions: it provides the attachment interface for the blade, structural reinforcement at the junction point, and a mounting surface for the fastening mechanism. This multi-functionality reduces the need for additional separate components.
3Ease of manufacture
If the blade is fixed permanently to the handle, then manufacturing simplicity is improved, but the tool reaches end-of-life when the blade becomes dull
Solution Approach 1:
The shovel is manufactured as separable components (handle assembly and blade assembly) that can be independently produced and then assembled. This allows the blade to be replaced when dull while retaining the handle assembly, extending the tool's overall lifespan.
Solution Approach 2:
The blade is designed as a consumable component that is discarded when dull, while the handle assembly and receiving plate are recovered and retained for future blade installations. This extends the tool's service life by allowing multiple blade replacements.
4Reliability
If a secure fastening mechanism is used to attach the blade, then blade attachment reliability is improved, but the ease of blade replacement decreases
Solution Approach 1:
The fastening system uses discrete fasteners that can be independently removed to detach the blade. This segmented approach allows for secure attachment during use while enabling straightforward removal when blade replacement is needed.
Solution Approach 2:
The fastening mechanism is designed to be user-operated without requiring special tools or complex procedures. The fasteners can be manually removed and reinstalled by the user, enabling easy blade replacement while maintaining secure attachment during normal use.
Data Source
AI summary
A digging tool is described herein having a handle, the handle having a first end and a second end, fasteners, wherein the fasteners have a head and a body, and a blade, the blade have a front surface and a back surface, wherein the blade is removably attached to the second end of the handle via fasteners such that the head of the fastener is substantially flush with the back surface of the blade.