Electromagnetic Contactor Crossbar Groove Design
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Solution Overview
Problem
The existing crossbar structure of electromagnetic contactors often experiences flipping of moving contact points due to repetitive use or external shocks, leading to failures in electric current application, contact point fusion, and damage to load equipment.
Innovation Solution
A crossbar structure with installation grooves and ribs that guide and stabilize the moving contact points, preventing them from flipping by ensuring proper alignment and secure movement, and enhanced contact pressure through a contact spring for consistent performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional crossbar structure is used, then the electromagnetic contactor can operate with simple structure, but the moving contact points flip due to repetitive use or external shocks causing failure
Solution Approach 1:
The crossbar structure is segmented by introducing installation grooves that divide the contact point mounting area into distinct guided pathways. This segmentation constrains the moving contact points to specific movement trajectories, preventing flipping while maintaining structural simplicity.
Solution Approach 2:
Installation grooves act as intermediary elements between the moving contact points and the crossbar body. These grooves mediate the movement of contact points, providing guidance and constraint without requiring complex external mechanisms.
2Manufacturing precision
If moving contact points are allowed to move freely, then the structure remains simple, but contact point alignment deteriorates leading to flipping
Solution Approach 1:
The installation grooves are pre-formed in the crossbar structure to establish predetermined movement paths for the moving contact points. This preliminary structural arrangement ensures proper alignment is maintained throughout operation without requiring active control mechanisms.
Solution Approach 2:
The installation grooves serve as intermediary guiding structures that passively maintain contact point alignment through their geometric constraints, eliminating the need for complex alignment mechanisms.
3Ease of manufacture
If the crossbar structure is simplified, then manufacturing is easier, but the moving contact points become susceptible to external shocks and flipping
Solution Approach 1:
The crossbar is manufactured with integrated installation grooves that segment the contact point mounting areas. This segmentation provides inherent protection against external shocks by constraining contact point movement within defined pathways, while the overall structure remains simple and manufacturable.
Solution Approach 2:
The installation grooves provide beforehand constraint that cushions the moving contact points against the harmful effects of external shocks. By pre-establishing guided pathways, the structure prevents shock-induced flipping without requiring additional protective mechanisms.
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 solution prevents flipping of moving contact points, ensuring stable and consistent electric current application, reducing equipment damage and enhancing the durability and reliability of the electromagnetic contactor.
Implementation Method 1
a bobbin coil 4 is disposed on a lower portion of an internal space formed by the upper and lower frames 1 and 2 and configured to generate a magnetic force when power is applied. A fixed core 5 is disposed below the bobbin coil 4 and magnetized when the bobbin coil 4 generates a magnetic force.
Implementation Method 2
A return spring 7 is disposed between the bobbin coil 4 and the moving core 6 and configured to provide an elastic force to the moving core 6.
Implementation Method 3
A contact spring 10 is disposed to provide a contact pressure force to each of the moving contact points 9.
Data Source
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AI summary
Disclosed are a crossbar structure of an electromagnetic contactor, and more particularly, a crossbar structure of an electromagnetic contactor in which consistent performance is made by preventing a moving mount from being flipped. In the crossbar structure of the electromagnetic contactor, the electromagnetic contactor includes a crossbar configured to move up and down and a moving contact point disposed on an installation groove, which is formed on the crossbar in a vertical direction, and brought in contact with or separated from a fixed contact point. In this case, the installation groove includes an insertion part into which the moving contact point is inserted and assemblable and an operating part closely formed enough to prevent the moving contact point from being flipped when the moving contact point moves up and down.