Elevator Door Drive with Independent Drivers for Misalignment Tolerance
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Solution Overview
Problem
Existing door drive devices for elevators require time-consuming manual adjustments of coupling elements to ensure precise alignment, which complicates installation and maintenance, especially in buildings with multiple floors.
Innovation Solution
A door drive device with independently displaceable drivers, allowing for flexible operation even when coupling elements are not perfectly aligned, eliminating the need for precise adjustments and enabling quick installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment of coupling elements is performed to ensure precise positioning, then positioning precision is improved, but installation time and complexity increase
Solution Approach 1:
The door drive device performs self-alignment through its inherent mechanical structure. The driver and coupling elements are designed with tolerance ranges that automatically accommodate misalignments without requiring external adjustment, enabling the system to self-adjust during normal operation
Solution Approach 2:
The invention changes the positioning parameters by introducing adjustable distance relationships between the driver and coupling elements. The system allows variable distances within specified ranges (e.g., 2-4 cm deviations) rather than requiring fixed precise positioning, thereby accommodating natural tolerances in manufacturing and installation
2Reliability
If precise alignment of coupling elements is required, then operational reliability is improved, but device complexity increases
Solution Approach 1:
The door drive device is segmented into independently adjustable components - the driver can be positioned independently relative to each coupling element. This segmentation allows each component to tolerate misalignment independently rather than requiring the entire system to be precisely aligned
Solution Approach 2:
The driver is designed with multi-functionality to handle both precise and imprecise alignment scenarios. It can operate reliably whether coupling elements are perfectly aligned or have deviations within the tolerance range, making the system universal and eliminating the need for complex adjustment procedures
3Manufacturing precision
If fixed distance between drivers and coupling elements is used, then manufacturing precision is improved, but adaptability decreases
Solution Approach 1:
The system transitions from fixed static distance requirements to dynamic adjustable distances. The driver and coupling elements can maintain operational functionality across a range of distances, allowing the system to adapt to different installation conditions while maintaining manufacturing simplicity
Data Source
AI summary
The invention relates to a door drive device for opening and closing corresponding elevator door leaves of elevator doors. The door drive device may have a first driver actins upon a first coupling element arranged on a first elevator door leaf to open a first elevator door leaf of a first elevator door, and a second driver acting upon a second coupling element arranged on a first elevator door leaf to close the first elevator door leaf. The first and second drivers can be displaced by a drive unit in an opening direction and a closing direction of the first elevator door. The drive unit may have a first drive for displacing the first driver and a second drive for displacing the second driver, and the first and second drivers can be displaced independently of one another in the opening direction and in the closing direction by the drive unit.