Movable Elevator Car Door Drive Arrangement
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Solution Overview
Problem
Elevator systems in tall buildings with multiple shaft doors face challenges in efficient energy usage and complex alignment, leading to high operational costs and mechanical stress due to the need for high-energy door drives and solid bearing elements.
Innovation Solution
The elevator system incorporates a car door with a translationally movable door leaf, a guide rail, and a drive arrangement that is movably mounted on the elevator car, allowing for efficient alignment and operation with reduced mechanical loads by displacing only the car door-shaft door coupling and its connected elements along a predefined path, using a belt drive arrangement with deflection elements and springs for support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the door drive is dimensioned with high output to displace the door header, then the alignment of the door header is improved, but the energy consumption increases
Solution Approach 1:
The system separates the door header (fixed to car) from the drive arrangement (movably mounted). Only the drive arrangement and coupling elements need to be displaced for alignment, not the entire door header assembly. This segmentation reduces the mass that requires high-energy displacement while maintaining alignment precision.
Solution Approach 2:
The drive arrangement is made dynamically movable relative to the car rather than being fixed. This allows the drive to be repositioned to different locations along the car's front face depending on the shaft door alignment requirements, enabling precise positioning with lower energy expenditure since only the drive components need displacement.
2Adaptability or versatility
If the entire door header is movably arranged on the elevator car, then the alignment flexibility is improved, but the mechanical load on bearing elements increases
Solution Approach 1:
The system divides the door assembly into a fixed door header portion and a movably mounted drive arrangement portion. This segmentation allows the drive to be repositioned for alignment flexibility while the heavy door header remains fixed, thereby reducing the mechanical loads on bearing elements compared to making the entire header movable.
Solution Approach 2:
The drive arrangement is extracted from the fixed door header structure and made independently movable. This extraction allows the drive to achieve alignment flexibility through its own mobility while the door header remains stationary, reducing the overall mechanical load requirements for the bearing elements.
3Manufacturing precision
If each shaft door is individually aligned with the car door, then the coupling precision is improved, but the mounting time and complexity increase
Solution Approach 1:
The drive arrangement's mobility allows it to be repositioned to optimally align with different shaft doors. This dynamic positioning capability enables precise coupling with each shaft door while reducing mounting time, as the drive can be quickly repositioned rather than requiring complex adjustments of fixed components.
Solution Approach 2:
The movably mounted drive arrangement serves multiple shaft doors at different locations. By being repositionable, a single drive arrangement design can accommodate alignment requirements for multiple shaft doors, reducing overall mounting complexity and time while maintaining coupling precision across all doors.
Data Source
AI summary
An elevator system includes an elevator car with a car door arranged on the elevator car. The car door includes at least one door leaf movable in a translatory manner, a guide rail fastened to the elevator car, which guide rail forms a guide for the translatory movement of the door leaf, and a drive assembly for driving the door leaf. The drive assembly is movably mounted on the elevator car.