Circuit Breaker Operating Mechanism With Single Reset Torsion Spring
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Solution Overview
Problem
The existing circuit breaker operating mechanisms are complicated due to the use of separate reset springs for the moving contact bracket and moving contact assembly, leading to increased production costs and assembly time.
Innovation Solution
An operating mechanism for a circuit breaker that incorporates a reset torsion spring with one end arranged on the base and the other on the moving contact assembly, allowing for synchronized rotation and contact pressure application, thereby simplifying the structure and reducing costs and assembly time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate reset springs are used for the moving contact bracket and moving contact assembly, then the reliability of each component is improved, but the device complexity and production cost increase
Solution Approach 1:
The patent combines two separate reset springs into a single reset spring that serves both the moving contact bracket and moving contact assembly. This merging reduces the number of parts, simplifies the structure, and lowers production cost while maintaining the functional reliability of both components through integrated elastic restoration.
Solution Approach 2:
The single reset spring is designed to perform multiple functions: it provides elastic restoration for both the moving contact bracket and the moving contact assembly simultaneously. This multi-functional design eliminates the need for separate springs while ensuring both components achieve reliable reset positions.
2Reliability
If separate reset springs are used for the moving contact bracket and moving contact assembly, then each component can be independently restored, but the assembly time increases
Solution Approach 1:
By merging two separate reset springs into one integrated spring, the assembly process is simplified from installing and adjusting two separate components to installing and adjusting a single component, directly reducing assembly time while maintaining restoration reliability.
Solution Approach 2:
The reset spring is pre-configured with connection structures (such as elastic fingers and connection holes) that enable simultaneous connection to both the moving contact bracket and moving contact assembly, allowing the restoration function to be established in a single assembly operation rather than requiring sequential assembly of separate springs.
3Device complexity
If a single reset torsion spring is used for both moving contact bracket and moving contact assembly, then the structure is simplified and production cost reduced, but the force distribution control becomes more difficult
Solution Approach 1:
The reset spring is designed with different local connection characteristics: one end connects to the moving contact bracket with specific elastic finger structures, while the other end connects to the moving contact assembly with different connection hole configurations. This local differentiation allows precise control of force distribution to each component despite using a single spring.
Solution Approach 2:
The reset spring utilizes its inherent elastic deformation characteristics to dynamically distribute force between the moving contact bracket and moving contact assembly based on their respective positional requirements. The spring automatically adjusts the force magnitude and direction applied to each component during the restoration process, achieving precise force control through elastic mechanics rather than rigid mechanical linkages.
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 proposed solution simplifies the operating mechanism, reduces production costs, and shortens assembly time by using a single reset torsion spring to apply forces for both disconnection and contact pressure, addressing the complexity and cost issues of the existing technologies.
Implementation Method 1
a reset torsion spring, wherein a first end of the reset torsion spring is arranged on a base of the circuit breaker, and a second end of the reset torsion spring is arranged on the moving contact assembly
Implementation Method 2
the reset torsion spring applies a force rotated towards a disconnection direction of the circuit breaker to the moving contact bracket
Data Source
AI summary
An operating mechanism of a circuit breaker includes a moving contact bracket, a moving contact assembly, and a reset torsion spring. The moving contact bracket is provided with a rotating shaft, and the moving contact bracket may be rotated around the rotating shaft; a first end of the reset torsion spring is arranged on a base of the circuit breaker, and a second end of the reset torsion spring is arranged on the moving contact assembly; the moving contact assembly is rotatably arranged on the moving contact bracket, and the moving contact bracket is provided with a limiting portion, so that in a closing process of the circuit breaker, the moving contact assembly is pressed against the limiting portion and rotated synchronously with the moving contact bracket, and the reset torsion spring applies a force rotated towards a disconnection direction of the circuit breaker to the moving contact bracket.