Leaf Pivot Drive Layout for Tight Installation Space
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Solution Overview
Problem
Existing drive devices for pivoting door or window leaves are complex in design and result in unfavorable transmission ratios, with limited installation space and inefficient use of available space.
Innovation Solution
A drive device configuration with an electric machine positioned between the leaf axis and the output shaft, combined with a gear system, allowing for favorable transmission ratios and compact design, utilizing an axial flux machine and modular components to optimize space and reduce friction losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the electric machine is positioned closer to the output shaft, then the transmission ratio is improved, but the installation space is reduced
Solution Approach 1:
The electric machine is repositioned from a conventional location to an installation space between the leaf axis and output shaft, utilizing previously unused spatial dimensions. This dimensional reconfiguration allows the machine to be closer to the output shaft for improved transmission ratio while still fitting within the constrained installation envelope.
2Area of stationary object
If a compact drive device configuration is used, then the installation space is reduced, but the design complexity increases
Solution Approach 1:
The electric machine and gear system are merged into a single integrated drive device configuration. The machine is positioned to directly engage with the gear mechanism, eliminating the need for separate mounting brackets, additional shafts, and intermediate coupling components, thereby achieving compactness without excessive design complexity.
Solution Approach 2:
The drive device is designed with multi-functionality, where the same compact configuration serves both as the motor mounting structure and as the transmission mechanism support. The housing and mounting elements perform multiple functions simultaneously, reducing the number of separate components needed.
3Power
If the electric machine is positioned between the leaf axis and output shaft, then the transmission ratio is improved, but the distance to control device increases
Solution Approach 1:
A flexible connection element, such as a bellows or flexible cable, is introduced as an intermediary between the electric machine and the control device. This allows the control device to remain mounted in its original position while still providing necessary control signals and power to the repositioned machine, effectively mediating the spatial separation.
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
The solution enables a compact, efficient, and space-saving drive device with improved transmission ratios, reducing friction and energy losses while allowing for automated operation and integration with mechanical energy storage for fire protection features.
Implementation Method 1
The electric machine can generate a rotational movement, in particular a torque, from electrical energy
Implementation Method 2
a gear with an output shaft that is mounted so as to be rotatable about an output axis
Data Source
AI summary
A drive device for pivoting a leaf, in particular a door leaf or window leaf, about a leaf axis, the drive device having a motor-transmission module, the motor-transmission module including an electric machine having a machine axis as well as a transmission having an output shaft that is mounted to be rotatable about an output axis. The electric machine is at least partially, in particular entirely, arranged in a mounting space between the leaf axis and the output axis.