Circuit Breaker Operating Mechanism With Independent Slider-Crank Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing circuit breaker operating mechanisms require the contact support and moving contact to be assembled for detection, leading to increased detection cost and reduced efficiency, as they cannot operate independently.
Innovation Solution
An operating mechanism with a rocker arm assembly, jump buckle, latch, and first crank, featuring slide rails and a slider that allows 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
1Measurement precision
If the existing four-link operating mechanism is used with contact support and moving contact assembled, then the detection can be performed, but the detection cost increases and efficiency decreases
Solution Approach 1:
The operating mechanism is segmented into independent functional modules: the four-link mechanism (bracket, jump buckle, latch, re-buckle) and the slider-crank mechanism (slide rails, slider, first connecting rod, first crank). This segmentation allows the operating mechanism to be tested independently without assembling the contact support and moving contact, thereby improving detection efficiency while maintaining detection capability.
Solution Approach 2:
The contact support and moving contact are extracted from the operating mechanism test setup. The patent enables the operating mechanism to complete its detection cycle independently by using the slider-crank mechanism to provide the necessary motion output, eliminating the requirement to assemble the contact system for testing purposes.
2Measurement precision
If the contact support and moving contact are assembled for detection, then the detection can be completed, but the assembly complexity increases
Solution Approach 1:
The mechanism is divided into separate functional segments that can be tested independently. The operating mechanism (four-link) is separated from the contact system, with the slider-crank mechanism serving as an independent motion generation unit. This reduces assembly complexity while preserving full detection capability.
3Productivity
If the operating mechanism is designed to operate independently without contact support, then the assembly efficiency improves and cost reduces, but the operational stability may be affected
Solution Approach 1:
The patent merges the four-link mechanism with the slider-crank mechanism into an integrated operating mechanism system. The slider-crank mechanism provides stable rotational-to-translational motion conversion, ensuring operational stability while allowing the mechanism to function independently without the contact support assembly.
Solution Approach 2:
The slider-crank mechanism acts as an intermediary that provides the necessary motion output and stability. The slider moves along guide rails to ensure constrained, stable motion while driving the first crank, thereby maintaining operational reliability without requiring the contact support assembly.
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The present invention relates to the field of low-voltage electrical appliances, and more particularly to an operating mechanism of a circuit breaker. The operating mechanism 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, wherein 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 the operating mechanism further includes 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, and the slider is in driving fit with a moving contact mechanism of the circuit breaker. The operating mechanism of the circuit breaker of the present invention can achieve disconnecting, closing and tripping operations independently.