Wall Bushing Cover Mechanism for Secure EV Charging Cable Pass-Through
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Solution Overview
Problem
Existing solutions for connecting an electricity source inside a building to an electric vehicle outside the building are visually unappealing, exposed to weather, and prone to tampering, with charging cables passing through doors or windows being costly and prone to defects.
Innovation Solution
A wall bushing with a hollow body and cover mechanism that allows easy installation through a building wall, featuring a guide mechanism and locking element to securely transition between closure and pass-through positions, facilitating the connection of an electrical cable between the building interior and exterior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a charging cable is led through existing openings such as doors or windows, then the connection between interior power source and exterior vehicle is achieved, but the solution is costly and prone to defects
Solution Approach 1:
The wall bushing is divided into separate components: a hollow body that is installed in the wall, a cover that attaches to seal the opening, and a cable guide mechanism. This segmentation allows for easier installation through standard wall openings rather than requiring modification of doors or windows, reducing installation cost and complexity while maintaining connection reliability
Solution Approach 2:
The wall bushing acts as an intermediary device that provides a dedicated cable passage through the wall. Instead of using existing openings like doors or windows, the wall bushing creates a purpose-built interface between interior and exterior, eliminating the need to route cables through inappropriate openings and reducing installation complexity
2Ease of operation
If the wall opening is left open for cable passage, then cable access is enabled, but the building interior is exposed to environmental factors and unauthorized access
Solution Approach 1:
The cover is designed to be movable between a closed position (sealing the wall opening) and an open position (allowing cable access). This dynamic design enables the opening to transition between protected and accessible states, allowing cable installation and maintenance while maintaining protection against weather and unauthorized access during normal operation
Solution Approach 2:
The hollow body seals the wall opening to protect against weather and unauthorized access, while the removable cover provides controlled access for cable installation and maintenance, resolving the contradiction between protection and accessibility
3Object-affected harmful factors
If a cover is added to close the wall opening, then protection against environmental factors is improved, but the device complexity increases
Solution Approach 1:
The cover is merged with the hollow body through simple attachment mechanisms (such as clips, screws, or snap-fits), creating an integrated sealing system. The cable guide mechanism is combined with the cover, eliminating the need for separate components. This merging reduces overall device complexity while maintaining protection functionality
Solution Approach 2:
The cover serves multiple functions: it seals the wall opening against weather, provides a mounting surface for the cable guide mechanism, and acts as a protective barrier against tampering. By consolidating these functions into a single component, the overall device complexity is reduced compared to having separate elements for each function
Data Source
AI summary
A wall bushing is provided for leading an electrical cable through a wall. The wall bushing includes a hollow body which extends at least for a portion along an axis of extension, the hollow body having a cavity in its interior and having an opening at each of two ends opposite each other in the direction of the axis of extension, forming an access to the cavity, and at least one cover which in a closure position of the wall bushing closes one of the openings at least partially and in a pass-through position frees up this opening at least partly. The wall bushing further includes at least one guide mechanism, which guides the cover relative to the hollow body and which comprises at least one locking element, by which the cover can be locked at least in the closure position. Also provided is a system for charging an at least partly electrically powered vehicle with a wall bushing, as well as a method for connecting a wallbox to an at least partly electrically powered vehicle.