Rotating Lever Vehicle Door Unit for Emergency Ejection
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Solution Overview
Problem
Emergency exit doors on vehicles, such as aircraft, are difficult to open quickly and efficiently, requiring significant space and time, and obstruct the exit route during the opening process.
Innovation Solution
A vehicle door unit with a rotating lever and drive unit that allows the door to be opened by rotating about a pivot shaft, moving into the vehicle interior before being ejected, minimizing obstruction and optimizing aerodynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the door is opened by manual separation and turning, then the door can be ejected through the opening, but the opening process is awkward and takes a long time
Solution Approach 1:
The door mounting is made rotatable about a second shaft, transforming the door from a static hinge-connected component to a dynamically movable one. This rotation capability enables the door to be quickly ejected through the opening by rotating the mounting, significantly reducing opening time and simplifying the opening operation compared to manual separation and turning
Solution Approach 2:
The door mounting is positioned to rotate about a second shaft that is offset from the door's centerline, creating a rotational movement in a different dimension. This dimensional change allows the door to be ejected through the opening by rotation rather than by complex manual manipulation, improving both speed and ease of operation
2Productivity
If the door is turned and conveyed outwards through the opening, then the door can be ejected, but space in the interior is required for turning and ejection
Solution Approach 1:
The door mounting rotates about a second shaft positioned such that the door's ejection path utilizes space outside the vehicle opening rather than requiring large interior space for turning. This dimensional change in the ejection mechanism allows efficient door removal with minimal interior space requirements
Solution Approach 2:
The door mounting and its rotation mechanism extract the door ejection function from the interior space, allowing the door to be rotated and ejected through the opening without requiring significant interior volume for the turning and conveying operations
3Reliability
If the door is secured closed with fittings and closure mechanisms, then secure closure is achieved, but the door requires significant space and time to open
Solution Approach 1:
The door mounting is made rotatable about a second shaft, creating a dynamic ejection mechanism that can quickly override the closure mechanisms in emergency situations. This rotational capability allows the door to be rapidly ejected despite being securely closed, minimizing opening time while maintaining closure security during normal operation
Solution Approach 2:
The rotatable door mounting is pre-configured with the capability to rotate and eject the door, so that in an emergency, the door can be quickly removed by simply rotating the mounting without requiring time-consuming manual separation or disengagement of multiple closure components
Data Source
AI summary
A vehicle door unit comprises a rotating lever supported rotatably about a first shaft at a first end, a door mounting coupled rotatably about a second shaft to a second end of the rotating lever, a door attached to the door mounting and being configured to cover an opening in a vehicle and to close off a vehicle interior, and a drive unit configured to rotate the rotating lever about the first shaft between a closed position and an open position. The rotating lever is configured to move the second shaft, on a movement from the closed position to the open position, on a circular path, due to which the door mounting is first moved into the vehicle interior and, on further rotation of the rotating lever, out of the vehicle interior.