Busbar Junction Box Safety Bar for Doorless Disconnection
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Solution Overview
Problem
Existing busbar junction boxes are complex, time-consuming to disassemble, and require additional components like doors, which increase manufacturing costs and reduce versatility.
Innovation Solution
A busbar branch box design that allows assembly and disassembly without accessing the interior, featuring a safety bar that tilts to unlock the disconnecting device, enabling secure and easy operation with standard disconnecting devices and providing visual confirmation of the device's state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door is added to the junction box to isolate the distribution device during disassembly, then safety is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts the door function from the enclosure and replaces it with a safety bar mechanism that provides isolation without requiring a physical door. The safety bar can be tilted to engage with the disconnecting device, providing the necessary isolation function while maintaining a simple, doorless enclosure design.
Solution Approach 2:
The safety bar serves multiple functions: it acts as a safety mechanism to prevent accidental isolation, provides visual indication of the disconnecting device state, and mechanically actuates the disconnecting device. This multi-functionality eliminates the need for separate door and indication mechanisms.
2Reliability
If a door is added to the junction box to isolate the distribution device during disassembly, then safety is improved, but manufacturing cost increases
Solution Approach 1:
The invention removes the door component entirely and replaces its safety function with a simpler safety bar mechanism. This extraction of the door function reduces manufacturing complexity and material costs while maintaining the essential safety isolation capability.
Solution Approach 2:
The safety bar is designed as a simple, inexpensive mechanical component that can be easily manufactured and replaced if needed. Its simple geometry and lack of complex mechanisms make it much cheaper to produce than a door assembly with hinges, latches, and alignment features.
3Reliability
If a door is added to the junction box to isolate the distribution device during disassembly, then safety is improved, but assembly and disassembly time increases
Solution Approach 1:
The invention extracts the door mechanism and replaces it with a direct-action safety bar system. The safety bar can be quickly tilted to engage or disengage the disconnecting device without requiring door opening, hinge operation, or latch manipulation, significantly reducing the time required for assembly and disassembly.
Solution Approach 2:
Instead of using a door that opens to allow access and then requiring separate actions to operate hooks, the invention inverts the approach by using a safety bar that directly actuates the disconnecting device from the outside. This eliminates the sequential steps of opening the door, accessing the interior, and then operating the disconnecting device.
4Ease of manufacture
If the enclosure orientation is constrained by a door, then manufacturing is simplified, but versatility is reduced
Solution Approach 1:
The invention removes the door that constrained the enclosure orientation and replaces it with a safety bar mechanism that can be positioned and oriented independently. This allows the enclosure to be mounted in various orientations while the safety bar provides the necessary safety function regardless of the enclosure's orientation.
Solution Approach 2:
The safety bar is designed to be tiltable and adjustable, allowing it to adapt to different enclosure orientations. This dynamic capability enables the same enclosure design to be used in multiple orientations and configurations, significantly increasing versatility without complicating the enclosure manufacturing.
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
The solution simplifies the assembly and disassembly process, enhances safety by ensuring the disconnecting device is open before disassembly, and reduces manufacturing complexity and costs by eliminating the need for a door.
Implementation Method 1
a return member, exerting an elastic force on the locking latch, relative to the housing, tending to tilt the locking latch from its unlocking position to its locking position
Implementation Method 2
the safety bar provides easy visual confirmation of the open or closed state of the disconnecting device, depending on its position
Data Source
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AI summary
This junction box (30) includes a housing (32) and a locking mechanism for locking the housing onto a busbar with hooks (82), which are operated by a handle (84) that can be operated from outside the housing. The box includes a switching device (70) that can be switched between a closed and an open configuration using a switching lever (74). The locking mechanism includes a safety bar (120) that is movable between a locked position, where the safety bar prevents the handle from moving to its unlocked position, and an unlocked position, where the switching device is in the open configuration and the safety bar does not prevent the handle from moving.The safety bar extends partially outside the housing, is operable by a user from outside the housing, and its tilting into the unlocked position impacts the switching lever so as to switch the cut-off device into the open configuration.