Elevator Door Coupling With Rotating Contact Body and Shared Drive
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Solution Overview
Problem
Existing elevator door systems require separate drives for the car and shaft doors, leading to complex and costly manufacturing processes.
Innovation Solution
A door system with electrically activated locks for both car and shaft doors, utilizing a simple door coupling mechanism with a contact body that rotates to couple and uncouple the doors, allowing synchronized movement via a motor-driven lever and guide webs, and a position-measuring device for controlled opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple door coupling design is used, then manufacturing cost is reduced, but a separate drive for the door coupling is required which increases system complexity
Solution Approach 1:
The patent combines the door coupling drive with the existing car door drive mechanism. The car door drive is extended to also drive the shaft door through the door coupling, eliminating the need for a separate drive mechanism. This merging of functions reduces overall system complexity while maintaining the simplicity and cost-effectiveness of the door coupling design.
Solution Approach 2:
The car door drive mechanism is designed to serve dual functions: driving the car door and driving the shaft door through the door coupling. This multi-functionality allows a single drive system to control both door operations, reducing the number of components and simplifying the overall system architecture.
2Reliability
If electrically activated locks are used for both car door and shaft door, then locking reliability is improved, but device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical locking mechanisms with electrically activated locks for both the car door and shaft door. This substitution provides more reliable locking control through electrical actuation while allowing for integrated control through the elevator's existing control system, thereby managing complexity through electronic integration rather than additional mechanical components.
Data Source
AI summary
An elevator door system has a shaft door, a car door, a car door drive and a door coupling that couples the car door to the shaft door. An electrically activated car door lock, locks and unlocks the car door in a closed position. The door coupling includes a contact body with a length dimension greater than a spacing between a pair of guide webs and a width dimension smaller than the guide web spacing. The contact body is arranged rotatably on the car door between the guide webs and a lever is connected to a drive means and rotationally to the contact body, the contact body being rotated by a movement of the drive means from a decoupled position, in which the contact body is arranged with play between the guide webs due to the width dimension, into a coupling position, in which the contact body touches the guide webs.