Multi-purpose spade with detachable V-tip
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Solution Overview
Problem
Existing multi-purpose spades have complex and expensive manufacturing processes, with crescent cutouts that are prone to damage and deformation, failing to meet the need for a cost-effective and durable digging tool with versatile functionality.
Innovation Solution
A multi-purpose spade design featuring a spade head with a 'V'-shaped cutout, a detachable 'V'-shaped tip, and a fastening mechanism using nuts and bolts, which simplifies the structure, allows for interchangeable tips, and enhances durability by distributing force effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-purpose spade uses a crescent cutout design with locking bolts and L-shaped locking slots, then the spade can have multiple functions, but the structure becomes complicated and manufacturing becomes expensive
Solution Approach 1:
The spade blade is divided into a spade head and a detachable tip portion. The tip portion can be detached and replaced based on different working conditions, allowing the spade to perform multiple functions (digging, cutting, scraping) while keeping the overall structure simple. The spade head has a V-shaped cutout that receives the tip portion, and they are connected through a simple fastening means rather than complex locking mechanisms.
2Adaptability or versatility
If a multi-purpose spade uses a crescent cutout design, then the spade can have multiple functions, but the crescent portion becomes vulnerable to damage and deformation
Solution Approach 1:
The blade is segmented into a spade head and a detachable tip portion. The tip portion is designed to be replaceable, so when it becomes damaged or worn, it can be simply detached and replaced with a new one, while the main spade head remains intact and reusable. This significantly improves the overall reliability and service life of the spade.
Solution Approach 2:
The tip portion is designed to be detachable and replaceable based on different working conditions. This dynamic configuration allows the user to swap tips for different tasks (e.g., sharp tips for cutting, flat tips for scraping), improving versatility while maintaining the structural integrity of the spade head.
3Ease of operation
If cutting edges are formed on inner edges of the spade head, then the spade can effectively cut plants and roots, but the pointed end region becomes vulnerable to damage
Solution Approach 1:
The cutting function is separated into the tip portion, which has cutting edges on its inner edges, while the pointed end region of the spade head is protected from direct cutting stresses. The tip portion acts as a sacrificial element that can be replaced if damaged, protecting the main spade head structure.
Solution Approach 2:
The tip portion is specifically designed with cutting edges on its inner edges to provide the cutting function, while the spade head maintains its structural integrity. This local specialization allows the tip to perform cutting tasks without compromising the overall strength of the spade head.
4Ease of manufacture
If a simple fastening means is used to attach the tip to the spade head, then manufacturing becomes easier and cheaper, but the connection strength may be reduced
Solution Approach 1:
The connection between the tip portion and spade head is designed to be simple and modular. The tip fits into the V-shaped cutout of the spade head and is secured with basic fastening means such as rivets, screws, or welds. This simple connection method is easy to manufacture and assemble while providing sufficient connection strength for the intended applications.
Data Source
AI summary
A multi-purpose spade includes a spade head having a “V”-shaped cutout; a detachable tip constructed to substantially conform to the “V”-shaped cutout of the spade head; and nuts and bolts for fastening the detachable tip to the spade head in which spade head includes first and second inner edges, and cutting edges or blades are formed on the first and second inner edges. However, such cutting edges or blades are not formed on a region adjacent to the pointed end of the “V”-shaped cutout, and first and second inner edges form an angle of about 30˜40 degrees, and more preferably about 30 degrees. The first and second edge portions have longitudinal slots respectively to receive the first and second inner edges.