Vacuum Circuit Breaker Cell Switch Perpendicular Motion
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Solution Overview
Problem
Existing mechanically operated cell (MOC) switches in vacuum circuit breakers face issues with uniform operation due to varying insertion strokes of the push rod, leading to potential component deformation, incomplete contact, and energy loss from sliding friction during ON/OFF operations.
Innovation Solution
The MOC switch design includes a main bracket, rotational shaft, connection lever, roller, and horizontal moving unit with a return spring, where the push rod and connection lever movements are perpendicular, minimizing impact and maximizing rolling friction to ensure stable and uniform operation across different stroke lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the push rod and connection lever movements are in the same direction, then the structure is simple, but impact occurs causing component deformation
Solution Approach 1:
The patent changes the movement direction from collinear (same direction) to perpendicular directions. The push rod moves vertically while the connection lever moves horizontally, transforming a one-dimensional motion into a two-dimensional motion. This dimensional change eliminates impact and deformation while maintaining structural simplicity through the use of a guide groove and roller mechanism.
2Length of moving object
If the push rod stroke is short, then the device is compact, but the MOC contact output is not made
Solution Approach 1:
By changing the motion from vertical (push rod direction) to horizontal (connection lever direction), the patent enables the connection lever to travel a sufficient horizontal distance to actuate the MOC switch contact, even when the vertical push rod stroke is limited. This allows compact design while ensuring reliable contact output.
3Device complexity
If sliding friction occurs between push rod and connection lever, then the structure is simple, but energy is lost
Solution Approach 1:
The patent replaces sliding friction with rolling friction by introducing a roller that contacts the connection lever. The roller rotates as the connection lever moves horizontally, converting sliding friction into rolling friction. This reduces energy loss while maintaining structural simplicity through the guide groove and roller assembly.
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
This design stabilizes MOC switch operation regardless of push rod stroke length, reduces energy loss through minimized friction, and prevents component deformation by converting impact into rolling friction, ensuring reliable ON/OFF state indication and interlocking.
Implementation Method 1
sliding friction may be made between the push rod 3 and the connection lever 4 to make a loss of input energy... minimizing impact and maximizing rolling friction
Implementation Method 2
horizontal moving unit with a return spring
Data Source
AI summary
There is provided a mechanically operated cell (MOC) switch of a vacuum circuit breaker, which is uniformly operated regardless of an insertion stroke of a push rod that operates a MOC switch of a vacuum circuit breaker. The MOC switch outputting an ON/OFF state of a vacuum circuit breaker when the vacuum circuit breaker operates includes: a main bracket; a rotational shaft installed in the main bracket; a connection lever rotatably coupled to the rotational shaft and having one end connected to an auxiliary switch; a roller coupled to the other end of the connection lever; and a horizontal moving unit installed in a portion of the to main bracket and making a horizontal movement to rotate the roller and allowing the other end of the connection lever to make an ascending and descending movement.