Elevator Door Vane Synchronization Mechanism
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Solution Overview
Problem
Existing elevator car door operator devices often cause the landing door hook to be locked prematurely when the closing speed of the landing door is slower than the car door, leading to premature kinetic energy consumption and friction issues that prevent normal door closure.
Innovation Solution
The elevator car door operator device features a door vane assembly with a first movable vane and a second movable vane, driven by a swinging rod mechanism and elastic elements, which controls the swinging range and speed to synchronize the landing door with the car door, preventing premature locking by adjusting the swinging direction and force based on the relative speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If asynchronous door vanes apply pushing force to the landing door in advance during door closing, then the landing door can be driven to move, but the landing door hook locks prematurely when closing speed is smaller than car door speed, causing premature kinetic energy consumption and potential failure to close normally
Solution Approach 1:
The patent introduces a movable vane that can dynamically change its position and swinging state during door operation. The vane swings from an initial position to a blocking position based on the relative speeds of the car door and landing door, allowing the system to adapt to different operating conditions and prevent premature locking
Solution Approach 2:
The movable vane acts as an intermediary element between the car door and landing door. It mediates the force transmission by selectively blocking or allowing the vane's movement, thereby controlling when the landing door hook engages with the fixed hook and preventing premature locking
2Speed
If the landing door closing speed is slower than the car door speed, then the landing door can be driven by the door operator, but the landing door hook loses control and locks prematurely, consuming initial kinetic energy too quickly
Solution Approach 1:
The system uses the relative speed difference between the car door and landing door as feedback to control the movable vane's position. When the landing door closes slower than the car door, the vane swings to the blocking position to prevent premature locking, and returns to the initial position when speeds are synchronized
3Force
If air pressure is present at the landing, then the sliding block at the bottom of the landing door squeezes the side wall of the sill, increasing friction force at the bottom, but the forced door closing force may become smaller than the friction force, preventing normal door closure
Solution Approach 1:
The movable vane performs preliminary action by blocking premature engagement of the landing door hook with the fixed hook. This prevents the landing door from losing control and ensures that the door closing force is applied effectively to overcome friction forces during the entire closing process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures the landing door is locked only when its speed matches the car door's, preventing premature locking and ensuring proper closure by managing the forces and speeds effectively, even under varying conditions such as air pressure and friction.
Implementation Method 1
an elastic element... the elastic element pushes the first movable vane to swing towards a door opening direction
Data Source
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AI summary
The present invention discloses an elevator car door operator device, which comprises an elevator door operator cross beam, a door vane assembly and a door vane mounting seat. The door vane assembly comprises a first movable vane, a second movable vane, a first movable vane driving device, a protruding part and a blocking part. The blocking part (9) is capable of abutting against the protruding part (13), limits the swinging range and swinging speed of the first movable vane (2) when the car door is opened, and enables the first movable vane (2) to swing towards a direction far away from the second movable vane (27) when the car door is closed. The present invention can prevent the rotatable hook of the landing door lock from contacting the fixed hook of the landing door lock prematurely, and effectively retain the kinetic energy of the landing door.