Switching Mechanism With Free Tripping and Bidirectional Drive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing operation mechanisms for disconnectors or circuit breakers are often manually controlled, lack bidirectional operation capability, and fail to guarantee free tripping functions.
Innovation Solution
An operation mechanism for switching devices that includes a housing, an operation handle, first and second driving members, and an elastic transmission member, allowing for bidirectional operation and free tripping through a designed protrusion and groove interaction, with sensors for pre-trigger signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operation handle is directly driven to rotate during tripping operation, then the switching device can be switched from closed state to open state, but the protrusion blocks the groove and prevents the second driving member from rotating, causing the free tripping function to fail
Solution Approach 1:
The groove is segmented into multiple sections with different functions: a first groove section for normal bidirectional operation where the protrusion engages, and a second groove section for free tripping where the protrusion disengages. This segmentation allows the mechanism to differentiate between normal operation mode and emergency tripping mode, enabling reliable free tripping while maintaining bidirectional operation capability.
Solution Approach 2:
The interaction between the protrusion and groove is made dynamic rather than static. During normal operation, the protrusion engages with the groove to transmit torque bidirectionally. During tripping operation, the protrusion automatically disengages from the groove when the driving member rotates beyond a certain angle, allowing free rotation for emergency tripping. This dynamic engagement/disengagement mechanism resolves the contradiction between maintaining operational control and enabling free tripping.
2Measurement precision
If the protrusion abuts against the first end of the groove during closing operation, then the second driving member rotates in the second direction to close the switching device, but the operation handle may not fully indicate the closed position due to blocking
Solution Approach 1:
The operation handle is designed to rotate in advance before the protrusion engages with the groove during closing operation. This preliminary rotation ensures that the handle is already positioned correctly to indicate the closed state before the mechanical engagement occurs, eliminating any delay or inaccuracy in position indication while maintaining smooth operation.
3Adaptability or versatility
If the operation mechanism uses manual control with external handle, then the structure is simple, but it lacks bidirectional operation capability and requires additional devices for state indication
Solution Approach 1:
The first driving member is designed to serve multiple functions: it transmits torque bidirectionally during normal operation, provides mechanical coupling between the operation handle and second driving member, and enables both opening and closing operations through the same mechanical path. This multi-functionality eliminates the need for separate mechanisms for different operations, achieving bidirectional capability without proportionally increasing complexity.
Solution Approach 2:
The state indication function is merged with the operation handle itself rather than requiring separate indicators. The handle's position directly indicates the switching device state, combining the operation mechanism and indication mechanism into a single integrated component, thereby achieving versatility without adding discrete indication devices.
Data Source
AI summary
An operation mechanism for a switching device and a switching device assembly are provided. The operation mechanism includes: a housing; an operation handle, a first driving member, a second driving member, when the switching device performs a tripping operation under an action of an internal electromagnet, in response to that the operation handle is blocked and not able to rotate, the second driving member rotates in the first direction to switch the switching device from the closed state to the open state, the protrusion move relatively in the groove, and a distance between the protrusion and the second end of the groove is configured such that the protrusion will not prevent the second driving member from rotating in the first direction to switch the switching device to the open state.