Hot Stick Power Tool Adapter with Lever Actuation
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Solution Overview
Problem
Electrical linemen face physical strain and overuse injuries when manually tightening or loosening high-voltage nuts and bolts using traditional manual ratchet tools attached to hot sticks, as the process is labor-intensive and prone to tool slippage.
Innovation Solution
A remote adapter that allows mounting of power tools on a hot stick, enabling remote activation via a non-conductive pull-rope to actuate the tool's trigger, reducing manual effort and strain by providing leverage and optimizing the pulling force required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual ratchet tool is attached to the end of a hot stick, then the lineman can tighten and loosen nuts and bolts at high voltage, but the process becomes physically demanding and causes overuse injuries
Solution Approach 1:
The patent replaces the manual mechanical ratchet system with a battery-powered electric tool system. The electric motor drives the socket wrench mechanism, eliminating the need for manual back-and-forth manipulation of the hot stick. The trigger-actuated motor provides automated tightening/loosening action, reducing physical strain on the lineman's shoulders, hands, and back while maintaining the ability to work on high voltage fasteners
Solution Approach 2:
The patent introduces a hot stick as an intermediary tool that allows remote operation of the power tool from a safe distance. The hot stick acts as a non-conducting extension that transmits the mechanical action from the lineman's hand to the power tool at the far end, enabling safe operation near high voltage equipment while maintaining mechanical leverage
2Object-affected harmful factors
If the hot stick is made longer to reach high voltage equipment, then the lineman can work from a safer distance, but manually manipulating the hot stick becomes even more physically demanding
Solution Approach 1:
The electric motor in the power tool replaces the need for manual manipulation of the hot stick. Instead of the lineman physically moving the entire hot stick back and forth, the motor-driven mechanism automatically performs the tightening or loosening action once the socket is positioned on the fastener, eliminating the physical burden of manipulating long hot sticks
3Ease of operation
If a battery-powered power tool is mounted on the end of a hot stick, then the physical effort is reduced, but the device complexity increases
Solution Approach 1:
The adapter design incorporates universal mounting features that can accommodate various power tool types and sizes. The hot stick interface uses a standardized mounting mechanism that can attach to different hot stick configurations. This universality reduces overall system complexity by using common, adaptable components rather than custom-designed parts for each specific tool or hot stick variation
Solution Approach 2:
The system is divided into separate modular components: the hot stick, the adapter assembly, the power tool, and the battery pack. This segmentation allows each component to be optimized independently and facilitates easy replacement or upgrading of individual parts without affecting the entire system, thereby managing complexity through modularity
4Reliability
If manual socket repositioning is required when the socket slips, then the work can be corrected, but the process requires great effort and time
Solution Approach 1:
The electric motor provides controlled, incremental movement that maintains consistent socket engagement. The motorized mechanism delivers precise torque application that reduces the likelihood of socket slippage compared to manual manipulation. If slippage occurs, the motor can quickly re-engage and continue operation, minimizing time loss compared to manual repositioning which requires significant physical effort
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 remote adapter significantly reduces the incidence of overuse injuries and increases productivity by allowing power tools to be used efficiently in high-voltage environments, enabling faster and more efficient work with reduced physical exertion.
Implementation Method 1
an actuator lever arm, for actuating a trigger of the power tool, the actuator lever arm including: a pull member having a rope attachment feature for attaching a non-conductive pull rope; and a trigger member having a trigger pin hole for receiving a trigger pin; an arm pivot hole for receiving a pivot pin, the pull member extending at an angle with respect to the trigger member, the arm pivot hole being disposed along the actuator lever arm between the rope attachment feature and the trigger pin hole
Data Source
AI summary
A remote adapter for use with a lineman's hot stick that enables the lineman to mount a wide variety of power tools onto the far end of the hot stick for tasks involving high voltage equipment. The remote adapter allows the power tool to be actuated by pulling on an insulating pull-rope. The remote adapter includes a body for supporting the power tool, the body including: at least one slot for receiving at least one strap configured to strap the power tool to the body, at least one pivot hole for receiving a pivot pin, and a splined universal connector for attachment to a hot stick. The remote adapter also includes a lever arm that is pivotable with respect to the body. The lever arm includes a hole for receiving a trigger pin which actuates the power tool trigger when the insulating rope attached to an attachment feature is pulled.