Removable Piercing Tool Distal End with Incomplete Thread
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Solution Overview
Problem
Existing piercing tools require replacement of the entire tool when the distal end portion becomes worn or broken, and cannot easily accommodate changes in object conditions such as geological state, thickness, or material, leading to inefficiencies and increased maintenance.
Innovation Solution
A piercing tool design where the distal end portion is removably mounted to a main body with a female thread and a male thread having an incomplete thread portion, allowing for easy replacement and adaptation to different conditions, with the distal end portion having a higher Rockwell hardness for durability and ease of removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the piercing tool is used repeatedly, then the distal end portion becomes worn or broken, but the entire tool must be replaced
Solution Approach 1:
The piercing tool is divided into two separable parts: a main body portion and a distal end portion. The distal end portion can be removed and replaced when worn or broken, while the main body portion remains intact and can be reused. This segmentation allows selective replacement of only the worn component rather than the entire tool, reducing waste and maintenance costs.
2Adaptability or versatility
If the piercing tool material or hole diameter is changed to adapt to different conditions, then the piercing operation can be performed stably, but the entire tool must be replaced
Solution Approach 1:
The tool is segmented into a main body portion and a distal end portion, allowing the distal end portion to be replaced with different materials or hole diameters to adapt to various object conditions (turf, leather, etc.), while the main body portion remains unchanged and reusable.
Solution Approach 2:
The main body portion serves as a universal component that can work with multiple types of distal end portions. Different distal end portions can be attached to the same main body to handle different materials and conditions, making the system multi-functional without requiring replacement of the entire tool.
3Reliability
If the distal end portion is made with higher hardness for durability, then it resists wear better, but it becomes more difficult to remove for replacement
Solution Approach 1:
The distal end portion is made with higher hardness (e.g., HRC 59-64) specifically at the working surface that contacts the object, while the rest of the component maintains appropriate toughness. This local quality enhancement provides durability where needed without making the entire component impossibly difficult to remove.
Solution Approach 2:
A crack is intentionally formed in the distal end portion before replacement is needed. This preliminary action (creating the crack) allows the hard distal end portion to be easily removed by hammering, as the crack provides a propagation path that prevents the hard material from resisting removal forces.
4Strength
If a complete thread is used for secure fastening, then the connection is strong, but the distal end portion cannot be easily removed
Solution Approach 1:
The thread structure is designed with different characteristics at different locations: the male thread on the main body has an incomplete thread portion that provides strong engagement during installation but allows easy removal. The female thread on the distal end portion is designed to engage fully during use but can be released when needed.
Solution Approach 2:
A crack is formed in the distal end portion before removal is needed. This preliminary crack allows the hard, securely fastened distal end portion to be easily removed by hammering, as the crack provides a propagation path that prevents the hard material from resisting removal forces.
Data Source
AI summary
A piercing tool can be used by optionally replacing a distal end portion, which is to be first brought into abutment against an object to be pierced such as the ground, and can facilitate a replacement operation of the distal end portion. A piercing tool includes: a distal end portion, which has a cylindrical shape, and is to be first brought into abutment against an object; and a main body portion, which has a cylindrical shape at the main body portion, and has one end portion to which the distal end portion is mounted, wherein the distal end portion is removably mounted to the one end portion of the main body portion. The distal end portion has an inner peripheral surface having a female thread formed at an end portion of the distal end portion on a side to be mounted to the main body portion.