Multi-Position Shifting Switch Locking Mechanism for Emergency Stop
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Solution Overview
Problem
Existing multi-position shifting switch locking mechanisms cannot shift from automation control mode to stop control mode without a key, posing a risk in emergency situations, such as for high-speed trains or subway trains, where immediate stopping is necessary.
Innovation Solution
A position lock and position shift controlling mechanism that includes a position lock and position shift assembly with a locked body, moving body, and controlling assembly, allowing the multi-position shifting switch to be shifted from automation control mode to stop control mode without a key by using a roundel pedestal, lock tooth component, and inner core component, which can rotate synchronously to align a notch with the moving body, enabling the switch to be shifted into the stop control mode position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a key cylinder and controlling cam are used to lock the automation control mode position, then misoperation is prevented, but the switch cannot be shifted to stop control mode without the key, creating emergency safety risks
Solution Approach 1:
The locking mechanism is segmented into two independent locking paths: one for normal operation (requiring key) and one for emergency stop (allowing direct rotation). The roundel pedestal with notch and axial slot separates the normal locking function from the emergency bypass function, enabling selective activation of different locking modes.
Solution Approach 2:
The axial projection and radial projection act as intermediary elements that mediate between the key-controlled locking path and the emergency bypass path. When the key is not used, the radial projection can still engage with the radial slot through the axial slot, allowing the emergency stop function to be activated without the key cylinder intervention.
2Adaptability or versatility
If the lock tooth component is rotatably attached to the roundel pedestal, then the switch can be shifted between positions, but the locking mechanism becomes more complex
Solution Approach 1:
The roundel pedestal and lock tooth component are merged into a single rotatable assembly that moves synchronously. The inner core component connects these two elements, allowing them to function as one integrated unit rather than separate mechanisms, thereby reducing overall structural complexity while maintaining position-shifting capability.
Solution Approach 2:
The lock tooth component serves multiple functions: it engages with location teeth for positioning, rotates with the roundel pedestal for mode switching, and can be selectively locked or unlocked through the axial slot mechanism. This multi-functionality reduces the need for additional separate components.
Data Source
AI summary
A position lock and position shift controlling mechanism for a multi-position shifting switch includes a position lock and position shift assembly and a controlling assembly to control the locking of the position lock and position shift assembly. The position lock assembly includes a locked body, a moving body and a housing body. The locked body includes a roundel pedestal which rotates synchronously with a switching shaft, a lock tooth component rotatably attached with the roundel pedestal, and an inner core component. The lock tooth component includes evenly distributed location teeth and plural radial slots. The moving body locks the lock tooth component and pushes the inner core component away from the lock tooth component. The switching shaft actuates the roundel pedestal to rotate a preset angle about the lock tooth component to shift the multi-position shifting switch to a stop control mode position from an automation control mode position.