Elevator Door Drive Unit with Direct Pivot Actuation
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Solution Overview
Problem
Existing elevator door systems are complex in construction due to numerous individual parts, making them difficult to manage and maintain.
Innovation Solution
A simplified door system design where the drive unit, comprising a pivotably mounted shaft with a driving mechanism, directly actuates the primary and secondary pivot axes through mechanical contact, eliminating the need for linkages and allowing for a space-saving configuration, enabling efficient operation of both car and shaft doors with fewer components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional door system with separate drive units and linkages is used, then the door system can operate both car door and shaft door, but the construction becomes complicated with many individual parts
Solution Approach 1:
The patent combines the drive unit for the shaft door and the drive unit for the car door into a single integrated drive mechanism. The drive shaft serves both functions, with the shaft door directly coupled to the drive shaft and the car door coupled through a coupling mechanism. This merging eliminates the need for separate motors, transmissions, and control systems, thereby reducing the number of individual parts while maintaining the capability to operate both doors.
Solution Approach 2:
The drive shaft is designed as a universal component that performs multiple functions: it directly drives the shaft door through the drive unit, and simultaneously drives the car door through the coupling mechanism. This multi-functionality allows a single component to replace what would traditionally require separate dedicated components for each door, simplifying the overall system construction.
2Adaptability or versatility
If a traditional linkage system is used to couple shaft door and car door, then both doors can be actuated, but the space requirements increase
Solution Approach 1:
The patent extracts and eliminates the traditional linkage system from the door actuation mechanism. Instead of using complex linkages to couple the shaft door and car door, the invention directly couples the car door to the drive shaft through a simplified coupling mechanism. This extraction of the linkage system significantly reduces the space requirements while maintaining the ability to actuate both doors effectively.
Solution Approach 2:
Instead of using a linkage system that connects the two doors through intermediate elements, the invention inverts the approach by directly coupling both doors to the common drive shaft. This inversion eliminates the need for space-consuming linkages and allows for a more compact arrangement of the door system components.
3Device complexity
If a simplified door system with direct mechanical contact is used, then the complexity and space requirements are reduced, but the design must accommodate direct actuation of both pivot axes
Solution Approach 1:
The patent employs dynamic coupling mechanisms that can adapt to the specific operational requirements of both the shaft door and car door. The coupling mechanism includes movable elements that can adjust their position and engagement based on the door positions and operational phase, allowing the simplified direct-drive system to maintain the versatility needed for proper door actuation sequences.
Solution Approach 2:
The coupling mechanism serves as an intermediary between the common drive shaft and the car door. This intermediary component translates the rotational motion of the drive shaft into the appropriate motion for the car door while coordinating with the shaft door operation. The mediator allows the simplified direct-drive architecture to achieve the complex coordinated actuation of both doors.
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 design reduces the complexity and space requirements of the door system, allows for optimal design based on door mass, and enhances operational efficiency by enabling simultaneous pivoting of both primary and secondary pivot axes, thereby increasing the capacity of the elevator system.
Implementation Method 1
a pivoting movement of the shaft causes a pivoting movement of the primary pivot axis and an associated pivoting movement of the door leaf
Data Source
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AI summary
The invention relates to a door system for an elevator installation, wherein the elevator installation comprises an elevator cabin (4) which can be arranged so as to be capable of travel in an elevator shaft (1), the door system comprising a cabin door (7) arranged on a cabin door side, a shaft door (6, 6.1, 6.2, 6.3) arranged on a shaft door side, wherein the cabin door (7) and the shaft door (6, 6.1, 6.2, 6.3) can be arranged spaced apart from one another in a closed position of the door system, a primary pivot spindle (22), which can be coupled to a pivotable door leaf (12), of the shaft or cabin door (6, 6.1, 6.2, 6.3, 7), wherein the door leaf (12) and the primary pivot spindle (22) can be arranged on a first of the sides comprising the cabin door side and the shaft door side, and a drive unit (30), which comprises a driven, pivotably mounted shaft (20), wherein a carry-along means (26) of the drive unit (30) is fixed to the pivotable shaft (20), and the drive unit (30) can be arranged on a second of the sides comprising the cabin door side and the shaft door side, wherein a counterpart element (27) which can be actuated by the carry-along means (26) is fixed to the primary pivot spindle (22) such that, during a pivoting movement (A) of the shaft (20), the carry-along means (26) effects a pivoting movement (B) of the primary pivot spindle (22), and an associated pivoting movement of the door leaf (12) can be effected, and to an elevator installation having a door system of said type.