Revolving Door Drive Coupling to Prevent Performance Mismatch
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Solution Overview
Problem
Existing drive systems for revolving doors do not prevent the installation of pivot elements with insufficient performance class, leading to potential damage and mechanical overload due to mismatched drive powers.
Innovation Solution
A modular drive system with varying drive powers and pivot elements, each assigned to specific performance classes, ensures rotationally fixed coupling only between compatible components, using mechanical coding features to prevent incorrect installations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a modular drive system with multiple performance classes is implemented, then adaptability and versatility are improved, but device complexity increases due to the need for multiple shafts with different drive powers and corresponding pivot elements
Solution Approach 1:
The drive system is segmented into multiple performance classes (e.g., S, M, L) with distinct shafts and pivot elements for each class. This segmentation allows the system to adapt to different door weights and applications while maintaining clear identification and coupling rules for each performance level, preventing mismatched installations.
Solution Approach 2:
Each shaft and pivot element combination has specific local qualities tailored to its performance class, such as varying shaft diameters, different coupling geometries, or distinct mechanical features. These localized differences enable compatibility matching while keeping the overall modular architecture manageable.
2Reliability
If mechanical coding features are added to shafts and pivot elements to prevent incorrect coupling, then reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
Mechanical coding features such as asymmetric keys, non-circular coupling profiles, or position-specific protrusions and recesses are implemented on shafts and pivot elements. These asymmetric features provide foolproof mechanical prevention of incorrect coupling while maintaining reasonable manufacturing tolerances through straightforward machining operations.
3Reliability
If pivot elements with higher performance class than required are installed, then reliability is improved by preventing overload, but ease of operation deteriorates due to potential incompatibility issues and installation complexity
Solution Approach 1:
The modular drive system is designed with universal coupling interfaces within each performance class, allowing pivot elements to be correctly matched to their designated shafts. The mechanical coding features ensure that only compatible combinations can be assembled, eliminating the need for technicians to manually verify performance class compatibility while maintaining the ability to install higher-performance components when needed.
Data Source
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AI summary
A drive system (10) for revolving doors (50) comprises a plurality of revolving door drives (11), in particular automatic revolving door drives, each of which has a shaft (13) for delivering a drive power and which differ from one another in terms of their drive power, such that a revolving door drive (11) can be selected from the revolving door drives (11) based on its drive power for the respective revolving door (50), and a plurality of articulation elements (15), wherein the respective articulation element (15) can be connected to a leaf (51) or a frame of the respective revolving door (50) via a rail (53) or a bearing block, wherein the articulation elements (15) differ from one another and each articulation element (15) is assigned to one of the revolving door drives (11).The respective articulation element (15) can only be coupled in a rotationally fixed manner to the shaft (13) of the respective associated revolving door drive (11) and the shaft(s) (13) of the revolving door drives (11) with lower drive power, but not to the shaft(s) (13) of the revolving door drives (11) with higher drive power.