Circuit Breaker Operating Mechanism With Independent Testable Linkage
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Solution Overview
Problem
The existing four-link operating mechanism of circuit breakers requires the contact support and moving contact to be assembled for detection, leading to increased detection costs and reduced efficiency, as it cannot operate independently.
Innovation Solution
The operating mechanism incorporates a rocker arm assembly, jump buckle, latch, re-buckle, first crank, and first connecting rod, with slide rails and a slider that allow independent operation, providing stable closing, disconnecting, and tripping positions without needing a contact support, facilitating modular assembly and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing four-link operating mechanism is used, then the circuit breaker can achieve disconnecting, closing and tripping operations, but the operating mechanism cannot operate independently requiring contact support and moving contact assembly for detection
Solution Approach 1:
The patent divides the operating mechanism into functionally independent modules: the bracket with slide rails serves as a standalone support structure, while the rocker arm assembly, jump buckle, latch, and re-buckle form an independent actuation system. This segmentation allows the operating mechanism to function without requiring the contact support and moving contact assembly, enabling independent detection and testing.
Solution Approach 2:
The bracket is designed with slide rails that can accommodate multiple operational states (disconnecting, closing, tripping) and serve multiple functions: providing structural support, guiding movement, and enabling independent operation. The universal design of the bracket allows it to work with different contact mechanisms while maintaining its core functionality.
2Reliability
If the contact support and moving contact are assembled for detection, then the operating mechanism can be tested, but the detection cost increases and efficiency decreases
Solution Approach 1:
The patent extracts the essential detection function from the complete assembly by allowing the operating mechanism to operate independently on the bracket with slide rails. The contact support and moving contact are removed from the detection process, yet the core operational reliability can still be verified through the rocker arm assembly, jump buckle, latch, and re-buckle mechanisms alone.
Solution Approach 2:
The operating mechanism performs self-detection by utilizing its own components (rocker arm assembly, jump buckle, latch, re-buckle) and the bracket with slide rails as the test platform. This self-service capability eliminates the need for external contact assemblies during detection, improving efficiency while maintaining reliability.
3Ease of operation
If the contact support is required for operation, then the mechanism can complete disconnecting and closing operations, but the assembly complexity increases and production costs rise
Solution Approach 1:
The patent segments the mechanism into an independent operating mechanism module (bracket, rocker arm assembly, jump buckle, latch, re-buckle) that can be manufactured and assembled separately from the contact support. This reduces assembly complexity and production costs while maintaining operational simplicity through the well-defined 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 mechanism enables independent operation, reducing detection costs and improving assembly efficiency by eliminating the need for a contact system, while ensuring stable operational positions and design flexibility.
Implementation Method 1
a first spring, wherein the rocker arm assembly is driving connection with the first crank through the first spring
Implementation Method 2
slide rails disposed on the bracket, and a slider slidably disposed on the slide rails, wherein the slider is rotatably connected to the other end of the first connecting rod
Data Source
AI summary
An operating mechanism of a circuit breaker that includes a bracket, a rocker arm assembly, a jump buckle, a latch, a re-buckle, a first crank, a first spring and a first connecting rod, the jump buckle is in latching fit with the latch, and the re-buckle is in limiting fit with the latch; one end of the first crank is pivotally disposed on the jump buckle around a first axis, and the other end of the first crank is rotatably connected to one end of the first connecting rod around a second axis; the rocker arm assembly is driving fit with the first crank through the first spring; and slide rails disposed on the bracket and a slider slidably disposed on the slide rails, rotatably connected to the other end of the first connecting rod, and in driving fit with a moving contact mechanism of the circuit breaker.