Contactor Motion Mechanism With Pivoted Brackets for Gravity Balance
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Solution Overview
Problem
Traditional electromagnetic contactors suffer from tilting and imbalance due to the influence of gravity on the moving iron core, which affects the service life and contact performance of the contactor, and also leads to contamination issues between the arc extinguishing chamber and the iron core suction function.
Innovation Solution
A motion mechanism with a moving iron core bracket and a moving contact bracket, pivotally connected around a pivot axis perpendicular to the movement and gravity directions, supported by a guide support mechanism to maintain balance and stability, and a base with isolated chambers to reduce contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the moving iron core and moving contact are fixed on a bracket to form an integrated rigid structure, then the transmission of movement is direct and simple, but the motion mechanism will tilt due to gravity influence, affecting balance and contact performance
Solution Approach 1:
The patent divides the motion mechanism into separate components: the moving iron core bracket and the moving contact bracket are no longer fixed together as an integrated rigid structure. Instead, they are positioned independently on the guide support mechanism, allowing each component to function separately without mutual interference and without tilting due to gravity.
Solution Approach 2:
The patent extracts the moving iron core and moving contact from their traditional fixed bracket configuration and positions them independently on the guide support mechanism. This separation removes the source of gravity-induced tilting while maintaining the functional relationship between components.
2Ease of manufacture
If a large through hole is opened in the base for the bracket to pass through, then the motion mechanism can be installed, but arc pollution carbide and metal particles are easily brought into the iron core chamber, causing unstable suction or sticking
Solution Approach 1:
The patent removes the need for a large through hole in the base by extracting the bracket structure from the design. The moving iron core bracket and moving contact bracket are positioned directly on the guide support mechanism without requiring passage through the base, thereby eliminating the contamination pathway.
Solution Approach 2:
The guide support mechanism serves as an intermediary structure that supports the motion mechanism components without requiring them to pass through the base. This intermediary structure eliminates the direct contamination pathway while still enabling proper installation and movement of the components.
3Force
If the moving iron core has heavy mass, then the magnetic field can effectively drive the moving contact, but gravity causes the motion mechanism to tilt during movement, affecting service life
Solution Approach 1:
The patent segments the heavy moving iron core from the moving contact structure, positioning the iron core on its own bracket that is independently supported by the guide support mechanism. This segmentation prevents gravity from causing tilting that would affect the contact components, while the heavy iron core continues to provide effective magnetic driving force.
Solution Approach 2:
The guide support mechanism provides support that counteracts the gravity-induced tilting of the heavy moving iron core. By independently supporting the iron core bracket, the mechanism balances the gravitational force on the heavy component while maintaining effective magnetic driving capability.
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 effectively reduces the influence of gravity on the motion mechanism, enhancing the balance and service life of the contactor, while minimizing contamination between the arc extinguishing and iron core suction functions, thereby improving contact performance and stability.
Implementation Method 1
Electromagnetic contactors usually generate a magnetic field by energizing the coil. Under the action of the magnetic field, the moving iron core will drive the moving contact to move
Data Source
AI summary
A motion mechanism, which is installed on a base and capable of translating in a movement direction. The motion mechanism includes: a moving iron core bracket, provided with a moving iron core and including a first connection part; a moving contact bracket, provided with a moving contact and including a second connection part; a guide support mechanism, through which the motion mechanism is supported on the base to enable the motion mechanism to translate in the movement direction; the first connection part and the second connection part are connected so that the moving iron core bracket and the moving contact bracket can be pivotally connected around a pivot axis perpendicular to the movement direction and a gravity direction. A contactor including the abovementioned motion mechanism also is disclosed.