Rotational Load Break Tool for Binding-Free Release
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Solution Overview
Problem
Existing load break tools often struggle for the operator to quickly and easily reach the necessary position to release the tool without binding or catching on cutouts or switches during the operation of medium- and high-voltage electrical circuit isolating devices, posing risks of arc damage and operator injury.
Innovation Solution
A load break tool with rotational flexibility, featuring a hub rotatably mounted to a hub mount, which is biased towards a home position, allowing for 180 degrees of rotation to facilitate easier engagement and disengagement from circuit isolating devices, thereby preventing binding and enhancing operator control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the load break tool is made rigid for structural stability, then the tool can maintain its shape and strength, but the operator cannot quickly reach the required position to release the tool without binding or catching on cutouts or switches
Solution Approach 1:
The patent applies the dynamics principle by making the handle rotatable relative to the main body of the load break tool. This allows the handle to change its orientation dynamically during operation, enabling the operator to reach the release position easily without binding or catching on surrounding equipment. The rotatable connection transforms a rigid structure into a flexible one that adapts to the operational requirements.
2Adaptability or versatility
If the load break tool is designed with fixed components for simplicity, then the device structure is simple and easy to manufacture, but the tool binds or catches on cutouts or switches during removal
Solution Approach 1:
The rotatable handle connection provides the necessary adaptability and range of motion to prevent binding during tool removal. While this adds some manufacturing complexity compared to a completely fixed structure, it maintains relative simplicity by using a straightforward rotational joint rather than complex articulated mechanisms.
3Ease of operation
If the hub is allowed to rotate freely for maximum flexibility, then the tool can reach any position for release, but the hub may rotate beyond the required range causing instability
Solution Approach 1:
The spring element is pre-loaded to bias the hub toward a home position, ensuring that the hub returns to a stable, predetermined position after rotation. This preliminary action of the spring counteracts the rotational movement and provides a restoring force that maintains position stability while still allowing the necessary range of motion for operation.
Solution Approach 2:
The spring element provides continuous feedback force on the hub, urging it back toward the home position. This feedback mechanism ensures that the hub does not rotate indefinitely but is constantly guided back to a stable position, maintaining both flexibility and reliability.
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 rotational flexibility of the load break tool provides improved range of motion and precise control, allowing for safe and efficient operation by preventing the tool from binding during removal, ensuring quick and easy release without causing damage or injury.
Implementation Method 1
a spring element positioned inside the interior bore and coupled to the cylindrical portion and biased in a direction to oppose rotation of the hub away from the neutral position
Data Source
AI summary
A load break tool is disclosed. The load break tool includes a main housing; a sleeve having a first end and a second end coaxially mounted in the main housing; a clip assembly connected to the main housing for engaging a pull ring of a circuit isolating device; a hub mount connected to the first end of the sleeve; and a hub rotatably mounted to the hub mount, the hub being biased toward a home position such that the hub returns to the home position when an external force is released.