Adjustable Interference-Fit Tool for Varying Tube Diameters
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Solution Overview
Problem
Conventional bicycle tools with elastic plugs fail to securely fit in tubes of varying diameters, get stuck, or lose interference-fit effect over time, causing inconvenience.
Innovation Solution
A tool with an interference-fit structure featuring an adjustable interference-fit member between a main body and an adjustment member, allowing the outer diameter to be changed by adjusting the distance between them, ensuring a tight fit in tubes of different sizes without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-diameter elastic plug is used for interference fit, then the tool can be secured in tubes of matching diameter, but it cannot adapt to tubes of varying diameters and may get stuck or fail to fit tightly
Solution Approach 1:
The interference-fit member is designed with adjustable diameter through the cooperation of the expansion groove, sliding portion, and elastic member. When the adjustment member rotates, it drives the sliding portion to move along the expansion groove, causing the interference-fit member to expand or contract radially. This dynamic adjustment mechanism allows the tool to adapt to different tube diameters while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent changes the diameter parameter of the interference-fit member by utilizing the elastic deformation of the elastic member and the geometric configuration of the expansion groove. By adjusting the position of the sliding portion along the groove, the outer diameter of the interference-fit member can be varied to match different tube sizes, resolving the contradiction between adaptability and structural simplicity.
2Reliability
If a conventional elastic plug is used, then the structure is simple, but the interference-fit effect is reduced after long-term use due to deformation
Solution Approach 1:
The adjustable interference-fit structure allows the user to reset and readjust the diameter of the interference-fit member after long-term use. The elastic member can be re-compressed and the sliding portion re-positioned along the expansion groove, restoring the original interference-fit effect. This dynamic reset capability significantly improves the durability and reliability of the interference-fit mechanism without requiring complex replacement procedures.
Solution Approach 2:
The adjustment mechanism is designed to be manually operable through direct rotation of the adjustment member, which self-adjusts the position of the sliding portion and the diameter of the interference-fit member without requiring additional tools or complex procedures. This self-service capability enhances reliability by enabling easy maintenance and adjustment by the user.
3Reliability
If the elastic plug is tightly fitted to prevent falling out, then security is improved, but the tool becomes difficult to remove and install
Solution Approach 1:
The adjustment member enables dynamic control of the interference-fit member's diameter. During installation, the user can rotate the adjustment member to reduce the diameter, allowing easy insertion into the tube. Once positioned, the user rotates the adjustment member in the opposite direction to expand the diameter, creating a tight fit that prevents the tool from falling out. This dynamic adjustment resolves the contradiction between secure positioning and ease of installation/removal.
Solution Approach 2:
The outer diameter parameter of the interference-fit member is made variable through the expansion groove and elastic member mechanism. By changing this parameter during the installation and removal process, the tool achieves both easy insertion (smaller diameter) and secure positioning (larger diameter), eliminating the trade-off between these two requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tool securely fits in tubes of varying diameters, maintaining a tight hold through adjustable interference-fit, enhancing usability and durability.
Implementation Method 1
The interference-fit member is a soft material provided between the adjustment member and the connecting end. The interference-fit member has an outer diameter, the outer diameter of the interference-fit member can be changed by changing the adjustable distance.
Data Source
AI summary
A tool with an interference-fit structure includes a main body, an adjustment member, and an interference-fit member. One end of the main body is defined as a connecting end. The adjustment member is connected to the connecting end, with an adjustable distance formed between the connecting end and the adjustment member. The adjustment member can be moved with respect to the connecting end to adjust the adjustable distance. The interference-fit member is provided between the adjustment member and the connecting end, and the outer diameter of the interference-fit member can be changed by changing the adjustable distance. By adjusting the adjustable distance between the adjustment member and the main body, the outer diameter of the interference-fit member can be changed to achieve an effective interference fit between the interference-fit member and the inner wall of a tube, thereby securing the tool in the tube.