Supply Rod Arc Seating for Accurate Flange-Guided Insertion
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Solution Overview
Problem
The existing supply rod configuration, with a V-shaped projection piece, results in point contact between the flange and the projection piece, leading to axis deviation and non-uniform circular-arc motion of the shaft-like component, causing erroneous insertion into target locations.
Innovation Solution
A supply rod with a circular-arc receiving surface at the distal end, combined with an inclined guide surface and a magnet for precise positioning and attraction, ensuring the flange fits the circular-arc receiving surface and maintains a uniform circular-arc trajectory during insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a V-shaped projection piece is used for close contact with the flange, then the structure is simple, but point contact causes axis deviation and non-uniform circular-arc motion
Solution Approach 1:
The invention replaces the V-shaped projection piece with a circular-arc receiving surface that has a curvature radius R. This curved surface matches the outer peripheral shape of the flange, transforming point contact into arc contact. The circular-arc shape ensures uniform circular-arc motion trajectory during insertion while maintaining structural simplicity, directly resolving the contradiction between simple structure and positioning accuracy.
2Ease of manufacture
If a flat inner surface is used in the projection piece, then manufacturing is easy, but contact location is not fixed causing non-uniform circular-arc trajectory
Solution Approach 1:
The flat inner surface is replaced with a circular-arc receiving surface having a specific curvature radius R. This curved geometry provides a fixed, deterministic contact location with the flange's outer peripheral portion. The curvature ensures that the contact point is consistently positioned, generating a uniform circular-arc trajectory during the insertion process, thereby improving reliability without significantly complicating manufacturing.
3Device complexity
If point contact is used between flange and projection piece, then the mechanism is simple, but slight force causes displacement and center axis deviation
Solution Approach 1:
The point contact interface is replaced with an arc contact interface formed by the circular-arc receiving surface. This arc contact provides a larger contact area and more stable geometric constraint, preventing flange displacement under external forces. The curved geometry inherently guides the flange to maintain proper alignment with the supply rod's center axis, improving axis alignment stability while keeping the mechanism relatively simple.
4Manufacturing precision
If the circular-arc receiving surface is formed only at the boundary portion, then positioning is accurate, but the structure becomes more complex
Solution Approach 1:
The circular-arc receiving surface is formed at the boundary portion between the distal end surface and the projection portion, utilizing the existing geometric transition in the supply rod structure. This approach achieves accurate positioning by concentrating the curved contact surface at the critical boundary area, rather than requiring complex curved structures throughout the entire component. The design leverages the natural geometric transition to achieve positioning accuracy without excessive structural complexity.
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 solution ensures accurate positioning of the shaft-like component on the center axis and maintains a uniform circular-arc trajectory, enhancing the reliability and accuracy of the insertion process, even under external forces.
Implementation Method 1
the close contact of the surface of the flange with the distal end surface is achieved with a magnet of an advancing/retreating type provided in the supply rod
Data Source
AI summary
A projection portion is formed on a distal end surface of a supply rod with which a surface of a flange is brought into close contact. A circular-arc receiving surface is formed at a boundary portion between the distal end surface and the projection portion, and is configured to fit a flange outer peripheral portion. One side of the circular-arc receiving surface is continuous with the distal end surface, and another side of the circular-arc receiving surface is continuous with an inclined guide surface. The close contact of the flange with the distal end surface is achieved with a magnet of an advancing/retreating type provided in the supply rod.