Draw-Out Switch Frame With Cam-Locked Shutters
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Solution Overview
Problem
Existing withdrawable electrical switching device chassis devices require two separate locking operations, one for the racking system and another for the shutters, which is cumbersome and requires multiple padlocks, especially for the shutters, complicating the locking process.
Innovation Solution
A chassis device with a locking system that integrates a cam mounted on the driven shaft, which actuates a follower to lock or unlock the shutters based on the racking system's position, eliminating the need for padlocks and simplifying the locking process by using the racking system to control the shutter locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate locking mechanisms are used for the racking system and shutters, then each component can be independently secured, but the locking process becomes cumbersome and requires multiple padlocks
Solution Approach 1:
The patent combines the locking functions for both the racking system and shutters into a single integrated locking mechanism. The follower engages with the cam profile to simultaneously control the positioning of the circuit breaker and the opening/closing of the shutters, eliminating the need for separate padlocks and simplifying the locking operation to a single action.
2Reliability
If multiple padlocks are required for shutters, then comprehensive security is achieved, but the device complexity increases
Solution Approach 1:
The patent merges multiple locking functions into a single integrated system where the follower and cam mechanism simultaneously control both the racking system and shutter positioning. This eliminates the need for multiple independent padlocks and reduces the overall complexity of the locking system while maintaining comprehensive security.
Solution Approach 2:
The locking mechanism is designed with multi-functionality, where the single follower component performs multiple functions: it controls the racking system positioning and simultaneously actuates the shutter opening/closing. This universal mechanism replaces what would traditionally require multiple specialized locking devices.
3Ease of manufacture
If the shutter locking is controlled separately from the racking system, then each function can be optimized independently, but the operational complexity increases
Solution Approach 1:
The patent merges the control of the racking system and shutters into a single operational sequence through the cam-follower mechanism. The cam profile is designed to coordinate both functions simultaneously, allowing the operator to perform both locking actions in one motion rather than managing separate control systems.
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 integration allows for simultaneous locking and unlocking of shutters using the racking system, reducing operational complexity and eliminating the need for multiple padlocks, enhancing ease of use and security.
Implementation Method 1
a cam (6a) mounted on the driven shaft (31a), or integrated in the latter, so as to be driven in rotation by the driven shaft (31a)
Implementation Method 2
a locking follower (6b) capable of being set in motion by said cam (6a) so as to be moved, depending on the functional position of the plug-in system (3), between a locking position blocking the or at least one of the shutters (4)
Data Source
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AI summary
The subject of the present invention is a frame device for a plug-in cutting electrical appliance, said device comprising a fixed frame (1), main electrical connection terminals and windows (1a) for accessing the connection terminals, a plug system (3) comprising a driven shaft (31a), at least one flap for closing the windows, a system (5) for controlling and actuating the flap(s) and a system (6) for locking the flap(s) (4). The locking system (6) comprises at least one locking assembly having a cam (6a) mounted securely on the driven shaft (31a), or integrated into the latter, and a locking follower (6b) that is able to be moved by the cam, according to the functional position of the plug system (3), between a position locking the or at least one of the flaps and a position unlocking the flap(s).