Air-Blowing Trip Mechanism With Integrated Reset Arm Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing molded case circuit breakers with air-blowing tripping mechanisms have complex structures and are prone to failure due to the need for additional resetting mechanisms like springs, which can lead to low production efficiency and reliability issues.
Innovation Solution
A simplified air-blowing tripping mechanism with a push rod and reset arm integrated into a housing, where a gas drives the insulating partition plate to rotate, triggering the tripping mechanism and resetting the push rod through an elastic reset arm, eliminating the need for separate resetting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate resetting mechanism (spring) is added to the push rod, then the tripping mechanism can reset after tripping, but the structure becomes complex and reliability decreases due to additional failure risks
Solution Approach 1:
The resetting function is merged into the push rod itself by integrating an elastic reset arm that is coaxially arranged with the push rod body. The reset arm and push rod form an integrated structure where the reset arm provides both resetting force and mechanical support, eliminating the need for separate spring mechanisms and reducing structural complexity while maintaining reliability
Solution Approach 2:
The push rod is designed with multi-functionality by incorporating the reset arm that serves dual purposes: it provides resetting force after tripping and simultaneously acts as a mechanical support structure. This multi-functional design reduces the number of components needed while ensuring reliable operation
2Productivity
If a separate resetting mechanism (spring) is added to the push rod, then the tripping mechanism can reset after tripping, but production efficiency decreases due to additional assembly steps
Solution Approach 1:
The resetting mechanism is combined with the push rod into a single integrated component. The reset arm is coaxially arranged with the push rod body and forms an integral structure, eliminating separate assembly steps for installing springs or resetting mechanisms, thereby improving production efficiency while simplifying the overall structure
3Ease of operation
If the sealing cavity is opened during push rod movement, then the push rod can move freely, but the sealing performance deteriorates
Solution Approach 1:
The sealing ring is nested within the groove on the push rod body, creating a layered sealing structure. The sealing ring sits in the groove and maintains contact with the cavity wall during push rod movement, ensuring sealing performance is preserved while allowing free movement. The nested arrangement enables the sealing function to be integrated into the moving component itself
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
This design enhances the reliability and production efficiency of the air-blowing tripping mechanism by simplifying the structure, ensuring a sealed state, and allowing for wide application in both single- and double-break-point circuit breakers, while maintaining cost-effectiveness.
Implementation Method 1
a gas is able to blow the insulating partition plate to move, so as to enter into the sealing cavity; the air-blowing end extends into the sealing cavity, is located on one side of the insulating partition plate and can drive the rotating arm to rotate under the action of the gas
Implementation Method 2
the elastic reset arm is disposed on one side of the rotating arm and used for driving the push rod to reset
Data Source
AI summary
An air-blowing tripping mechanism that is driven by gas, and includes a housing having a sealing cavity with an air-blowing channel blocked by an insulating partition plate that is blown by the gas to move, whereby the gas enters the sealing cavity, and a push rod rotationally connected to the housing. The push rod includes a rotating arm rotationally connected aside of the sealing cavity, and a reset arm. One end of the rotating arm has an operating portion opposite to an operating mechanism of a circuit breaker, and the other end of the rotating arm has an air-blowing end that extends into the sealing cavity, is located on one side of the insulating partition plate and can drive the rotating arm to rotate under the action of the gas. The reset arm is on the rotating arm and used for driving the push rod to reset.