Toggle Switch Operating Mechanism With Dual Roller Head
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Solution Overview
Problem
Existing operating mechanisms for circuit breaker handles are not suitable for toggle switch handles, particularly for high current circuit breakers, as they are designed for rotary handles and do not effectively manage the forces required for operating toggle switches.
Innovation Solution
A bar with a roller head having two rolls is used, where the first roll operates the toggle switch handle by rolling over it, and the second roll stabilizes the mechanism by blocking rotation around its longitudinal axis, reducing applied forces and improving equilibrium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a friction-locked bar mechanism is used for rotary handles, then remote operation is achieved, but the mechanism cannot be applied to toggle switch handles
Solution Approach 1:
The roller head is divided into two separate rolls with distinct functions: the first roll contacts the toggle switch handle to convert linear motion to rotational motion, while the second roll contacts the guide plate to prevent unwanted rotation of the bar. This segmentation allows the mechanism to be adapted to toggle switch handles while maintaining controlled movement.
Solution Approach 2:
The roller head acts as an intermediary element between the movable bar and the toggle switch handle. It transfers the linear motion of the bar to the rotational motion required for operating the toggle switch, while the second roll provides an additional intermediary contact with the guide plate to stabilize the mechanism.
2Force
If direct pushing force is applied to toggle switch handle, then operation is achieved, but excessive force is required
Solution Approach 1:
The roller head uses cylindrical rolls instead of direct linear contact. The curved surface of the first roll converts the linear pushing force of the bar into rotational force on the toggle switch handle, reducing the magnitude of force required to operate the handle by utilizing mechanical advantage through rolling contact.
Solution Approach 2:
The mechanism replaces direct linear pushing with a rolling contact system. The first roll transforms the linear motion and force from the bar into rotational motion and torque on the toggle switch handle, making operation easier by substituting a less efficient direct push with a more efficient rolling conversion mechanism.
3Stability of the object's composition
If bar is allowed to rotate freely around longitudinal axis, then movement flexibility is achieved, but unstable operation results
Solution Approach 1:
The second roll provides a localized constraint function by contacting the guide plate at a specific location. This localized contact prevents rotation of the bar around its longitudinal axis while allowing linear movement along the axis, creating stable and controlled operation without restricting the necessary movement flexibility.
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 mechanism effectively reduces the forces needed to operate toggle switch handles and stabilizes the movement, making it suitable for high current circuit breakers by converting pushing forces into rotational forces and maintaining equilibrium.
Implementation Method 1
a first roll (20) being provided for turning on the toggle switch handle (36) depending on a movement of the bar (12)
Implementation Method 2
a second roll (22) being provided for rolling over a plate (24) and blocking a rotation of the bar (12) around its longitudinal axis
Data Source
AI summary
An operating mechanism for a toggle switch handle includes a bar that is movably mounted along its longitudinal axis, and a roller head mounted at one end of the bar. The roller head includes two axes for rolls. The first roll of the rolls is provided for turning on the toggle switch handle depending on a movement of the bar, and a second roll of the rolls is provided for rolling over a plate and blocking a rotation of the bar around its longitudinal axis.