Insertion Guide Multi-Step Shaft Rotation Phase Correction
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Solution Overview
Problem
Existing insertion guides struggle to perform accurate rotation and phase correction when a pin for phase correction is used inside a hole, due to rotation moments generated by contact between the pin and the engagement portion on the shaft, leading to inaccurate insertion operations.
Innovation Solution
The insertion guide features a first guide portion with a smaller diameter, a second guide portion with a larger diameter than the hole, and a third guide portion as a recessed portion to engage with a protruding portion in the hole, allowing for accurate rotation and phase correction by minimizing contact points and separating rotation and phase moments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple guide portions with different diameters are provided on the shaft, then both rotation correction and phase correction can be performed accurately, but the device complexity increases
Solution Approach 1:
The guide structure is designed as a universal multi-functional component that integrates both rotation correction and phase correction capabilities within a single integrated guide assembly. The first and second guide portions handle rotation correction, while the third guide portion handles phase correction, allowing one component to perform multiple correction functions simultaneously.
Solution Approach 2:
The guide portions are arranged in a nested configuration along the axial direction, with the first narrow cylindrical portion and second narrow cylindrical portion creating a stepped structure. This nesting approach allows multiple guide portions to be compactly arranged without excessive space requirements, reducing overall complexity while maintaining functional independence.
Data Source
AI summary
Provided is an insertion guide that performs accurate rotation correction between a shaft and a hole and phase correction between the shaft and hole. The shaft includes: a first guide portion at a distal end of the shaft having a diameter smaller than a diameter of the hole; a second guide portion, provided on a base end side of a first narrow cylindrical portion, and having a diameter smaller than the diameter of the hole and larger than a diameter of the first narrow cylindrical portion; and a third guide portion, provided at the distal end of the shaft, and is a recessed portion to be engaged with a protruding portion formed in the hole. The shaft being inclined with respect to the hole, is brought into contact with the hole at two points or less before the third guide portion is brought into contact with the protruding portion.