Interlocking Wear Strip for Shovel Blade
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Solution Overview
Problem
Existing shovel designs with permanently or semi-permanently mounted wear strips are difficult to install and replace, require special tools, and do not allow for user-replacement, limiting the tool's lifespan and versatility.
Innovation Solution
A shovel head with a leading edge wear strip featuring a slot with concave internal indentations that interlocks with matching convex external ribs on the blade, allowing for easy installation and removal using simple hand tools, extending the tool's lifespan and enabling material selection based on application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wear strip is permanently or semi-permanently mounted to the shovel blade, then the wear strip provides protection and extends shovel life, but the wear strip becomes difficult to install and replace, requiring special tools and processes
Solution Approach 1:
The wear strip is designed as a separate, removable component rather than being permanently integrated into the blade. The slot with concave internal indentations allows the wear strip to be segmented from the blade structure, enabling easy installation and replacement without special tools while maintaining protective function.
Solution Approach 2:
The wear strip features concave internal indentations that nest over convex external ribs on the blade, creating an interlocking relationship. This nesting mechanism secures the wear strip in place during use but allows for simple removal by pulling, eliminating the need for special installation tools.
2Stability of the object's composition
If a wear strip is permanently mounted to the shovel blade, then the wear strip remains secure during use, but the user cannot replace the wear strip when it degrades, limiting the shovel's useful life
Solution Approach 1:
The wear strip attachment system transitions from a static permanent bond to a dynamic interlocking mechanism. The convex external ribs engage with concave internal indentations to provide security during use, but the design allows the wear strip to be dynamically removed and replaced by the user when degradation occurs.
Solution Approach 2:
The wear strip is designed as a replaceable component that can be discarded when degraded and recovered/reinstalled when new. The interlocking slot and rib design facilitates this discarding and recovering process, allowing users to extend the shovel's useful life by replacing worn wear strips rather than replacing the entire shovel.
3Reliability
If special tools and processes are used to attach the wear strip, then the wear strip attachment is secure and durable, but the manufacturing and assembly process becomes complex and inefficient
Solution Approach 1:
The wear strip attachment system is designed to be self-servicing during both installation and use. The interlocking convex ribs and concave indentations create a self-securing mechanism that requires no special tools or complex processes for attachment, thereby maintaining secure attachment while dramatically improving manufacturing efficiency.
4Reliability
If the wear strip is made of a specific material for a particular application, then the wear strip optimizes performance for that application, but the shovel becomes less versatile for different applications
Solution Approach 1:
The wear strip is designed as a universal, replaceable component that can be made from different materials depending on the application. The standardized interlocking slot and rib design allows the same attachment mechanism to work with wear strips made of various materials (metal, plastic, composite), making the shovel versatile for different applications while maintaining optimized performance for each specific use.
Data Source
AI summary
A shovel head, with a receptacle for a shaft, and a blade with two faces; a top face and a bottom face. The blade utilizes a separate, but interlocked, wear strip on the leading edge of the blade. The wear strip is similar in length to the length of the leading edge of the blade. The wear strip has a slot built into it, with an upper lip and a lower lip, and the slot runs parallel to the blade's leading edge and is of similar size in contrast to the blade thickness. There are two concave indentations internally, with one on the top lip of the slot, and one on the bottom lip of the slot, running parallel to, and the full length of the slot. On the faces of the blade there are two convex ribs, one rib on the top face, and one rib on the bottom face. The two ribs run parallel to the leading edge of the blade. The convex ribs on the blade's top and bottom face match in contrast to the concave indentations on the upper and lower lip of the wear strip slot in both size and shape. The wear strip is made of a material allowing some elasticity or spring back. The wear strip is applied to the leading edge of the blade by force; the leading edge of the blade aligns with the slot in the wear strip. As the leading edge of the blade moves further into the slot of the wear strip, and with the elasticity of the wear strip material, the convex ribs on the blade faces begin to spread the upper and lower lips of the slot in the wear strip wider as the wear strip passes over them. With continued force the wear strip is applied further onto the leading edge of the blade until the convex ribs on the blade faces and the concave indentations in the wear strip slot align with each other. The wear strip upper and lower lips snap back to form their original shape over the ribs, thus interlocking and attaching the wear strip to the leading edge of the blade on the shovel head.