Drive Pin Assembly for Power Setting of Drop-In Anchors
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Solution Overview
Problem
The repeated striking of setting tools with a hammer to install drop-in anchors, especially overhead, causes significant user fatigue and potential injuries.
Innovation Solution
A drive pin assembly for a power tool that includes a drive pin body, a drive pin, and a threaded die, which is radially expanded by a movable drive pin to set the anchor, eliminating the need for manual hammering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual hammering is used to install drop-in anchors, then the installation process is simple and requires minimal equipment, but user fatigue and potential injuries increase significantly
Solution Approach 1:
The patent replaces the manual hammering mechanical system with a power-driven mechanical system. The power tool uses a drive pin that moves axially to radially expand a threaded die, which then engages with the anchor to set it in place. This substitution eliminates the need for repeated manual hammer strikes, directly addressing user fatigue while introducing a more complex but automated mechanism.
2Productivity
If repeated hammer strikes are used to set the anchor, then the installation process requires minimal equipment, but the time and physical effort required increase
Solution Approach 1:
The power tool system performs the anchoring operation automatically once positioned. The drive pin's axial movement automatically translates to radial expansion of the threaded die, which self-engages with the anchor. This self-service mechanism eliminates the need for continuous manual hammering, reducing physical effort while maintaining installation speed.
3Manufacturing precision
If manual setting tools are used, then the equipment required is simple, but the precision and consistency of anchor installation decrease
Solution Approach 1:
The patent employs a dynamic mechanism where the drive pin's axial movement is converted to radial expansion of the threaded die through a ramped surface. This dynamic transformation ensures consistent and precise anchor setting with every operation, eliminating the variability associated with manual hammering. The mechanical linkage provides repeatable expansion force and positioning, improving installation precision while requiring a more complex tool design.
Data Source
AI summary
A drive pin assembly for use with a power tool to install a drop-in anchor includes a drive pin body, and a drive pin disposed within the drive pin body and configured to be inserted into the drop-in anchor. The drive pin is moveable relative to the drive pin body between a retracted position and an extended position. The drive pin assembly also includes a threaded die supported by the drive pin body and configured to be inserted into the drop-in anchor with the drive pin. The threaded die is movable radially outward by the drive pin as the drive pin moves from the retracted position toward the extended position.