Lag Driver With Integrated Pilot Hole Drilling
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Solution Overview
Problem
The manual installation of hook and eye fasteners is physically intensive and time-consuming, requiring predrilled pilot holes and lacking efficient mechanical engagement with conventional drill chucks.
Innovation Solution
A lag driver with a drive shank and body assembly that securely receives and rotates hook or eye fasteners into a locked position, allowing for torque application and efficient installation without pre-drilled holes, compatible with standard hand drills.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual installation process is used for hook and eye fasteners, then no special tool is required, but the process is physically intensive and time-consuming
Solution Approach 1:
A lag driver tool serves as an intermediary device between the operator and the fastener. The tool includes a drive body with a fastener-receiving portion that interfaces with the fastener, and a drive shank that interfaces with a power drill, mediating the installation process to enable power-driven installation without requiring modification to the fastener itself
Solution Approach 2:
The lag driver is designed with universal compatibility - the drive shank can be engaged with conventional drill chucks, and the fastener-receiving portion can accommodate various hook and eye fastener types, making the tool adaptable to multiple installation scenarios without requiring tool changes
2Device complexity
If manual installation process is used for hook and eye fasteners, then no power tool is required, but the process requires predrilled pilot holes
Solution Approach 1:
The lag driver incorporates a pilot hole drilling function integrated into the drive body. The tool is designed to first drill a pilot hole into the substrate, then receive and drive the fastener through the same opening, eliminating the need for separate pre-drilling operations by performing the preliminary action as part of the unified installation process
Solution Approach 2:
The installation process merges multiple operations into a single tool action. The lag driver combines pilot hole drilling and fastener driving functions in one tool, allowing both operations to be performed in sequence without removing the tool or changing procedures, effectively combining what were previously separate manual steps
3Strength
If hook and eye fasteners are mounted to bear load, then secure mounting is achieved, but the manual process is physically intensive
Solution Approach 1:
The lag driver replaces the manual mechanical installation process with a power-driven system. The drive shank interfaces with a power drill to deliver rotational torque to the fastener through the drive body, substituting human physical effort with mechanical power while maintaining the same fastening and load-bearing outcome
Data Source
AI summary
A lag driver includes a drive shank and a drive body assembly extending from the drive shank. The drive body assembly includes a fastener-receiving portion, wherein a fastener is receivable within the fastener-receiving portion in a first, loading position such that the fastener is positionable in substantial coaxial alignment with the lag driver, and wherein the fastener is rotatable into a second, locked position within the fastener-receiving portion such that the fastener-receiving portion is engageable with a portion of the fastener for applying torque to the fastener.