Insertion Tool Linear Hook Drive for Threaded Coil Alignment
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Solution Overview
Problem
Existing insertion tools for tang-free helical coil inserts suffer from alignment issues and uneven wear due to the radially sweeping path of the hook, leading to compromised precision engagement between the tool's hook and the drive notch of the coil.
Innovation Solution
A rotatable mandrel with a drive projection and bias member that confines the drive hook to travel in a linear motion, ensuring perfect alignment with the drive notch and minimizing wear by maintaining consistent orientation during engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hook travels in a radially sweeping path toward the coil notch, then the hook can engage the drive notch, but the hook changes longitudinal position and orientation, leading to misalignment and uneven wear
Solution Approach 1:
The hook is designed to pivot dynamically within a constrained arc, transitioning from a retracted position to an extended engagement position. This dynamic movement allows the hook to adapt to the drive notch while maintaining precise alignment through the defined arc path, preventing both misalignment and uneven wear during engagement.
Solution Approach 2:
A guide structure acts as an intermediary between the hook and the drive notch, constraining the hook's movement to a specific arc path. This guide structure ensures that the hook maintains proper orientation and alignment while engaging the drive notch, eliminating the radial sweeping path that causes misalignment and wear.
2Ease of operation
If the hook travels in a radially sweeping path, then engagement is achieved, but different orientations of hook contact various coils, encouraging uneven wear
Solution Approach 1:
The hook pivots along a constrained arc path rather than sweeping radially, which dynamically adjusts the engagement angle while maintaining consistent orientation. This controlled dynamic movement ensures that the hook engages different coils at uniform orientations, preventing uneven wear and extending tool lifespan.
Solution Approach 2:
The hook's movement is constrained to change only one parameter (position along the arc) while maintaining constant orientation parameters. This parameter control ensures that the hook engages all coils at the same optimal angle, eliminating the orientation variations that cause uneven wear.
3Ease of operation
If the hook extends through the mandrel, then engagement with drive notch is possible, but alignment precision is compromised due to radial sweeping motion
Solution Approach 1:
A guide structure serves as an intermediary that constrains the hook's movement to a precise arc path. This guide ensures that as the hook extends to engage the drive notch, it maintains accurate alignment throughout the movement, preventing the radial sweeping motion that would compromise precision.
Solution Approach 2:
The hook's extension movement is converted into a controlled pivot along a defined arc, allowing the hook to reach the drive notch while maintaining precise alignment. This dynamic constraint ensures that accessibility is achieved without sacrificing alignment precision.
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 enables efficient and effective insertion of threaded inserts with reduced wear on the tool's hook, maintaining precise alignment and extending the tool's lifespan.
Implementation Method 1
a bias member (e.g., spring) that engages with the drive projection such that the bias member urges the drive projection to extend the drive hook proud of the projection slot
Data Source
AI summary
An insertion tool is used to insert a threaded coil insert into a threaded opening of a support structure. The tool includes a rotatable mandrel body having an axial longitudinal passage and a projection slot. A plunger is disposed in the passage forward of a spring which urges the plunger forward. The plunger in turn urges a drive projection. A front end of the plunger includes an inclined surface that slidingly and inclinedly engages an inclined surface of the drive projection. The urging of the drive projection by the plunger along their respective inclined surfaces causes relative sliding movement of the drive projection so that the drive projection translates linearly through the projection slot in a direction perpendicular to the longitudinal passage.