Cuboidal Door Drive Motor Layout for Compact Sliding Door Systems
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Solution Overview
Problem
Existing door drives for automatic sliding doors require significant construction space due to high-speed motor units and gear units, leading to complex designs and inefficient space utilization, especially when integrating power units, controllers, and other components, which complicates achieving high power density and compact dimensions.
Innovation Solution
A door drive with a motor unit having a cuboidal shape formed by two connected housing halves, allowing for a compact integration of the motor, power unit, controller, and other components, with a belt pulley directly attached to the output shaft, enabling high power density and reduced noise operation without the need for additional space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-speed motor unit with a gear unit is used to drive the door system, then the rotational speed is sufficient for operation, but the construction space requirement increases and the device complexity increases
Solution Approach 1:
The motor unit is integrated directly with the belt pulley by attaching the pulley to the motor's output shaft, eliminating the need for a separate gear unit. This merging of components reduces construction space while maintaining the high rotational speed capability of the motor for driving the door system.
Solution Approach 2:
The gear unit is extracted or removed from the system entirely. The patent describes a motor unit where the belt pulley is directly attached to the output shaft without any intermediate gear reduction mechanism, thereby eliminating the space-consuming gear unit while preserving the motor's high-speed rotational capability.
2Speed
If a high-speed motor unit with a gear unit is used to drive the door system, then the rotational speed is sufficient for operation, but the device complexity increases
Solution Approach 1:
The motor unit and belt pulley are merged into a single integrated assembly. The pulley is directly attached to the motor's output shaft, combining what were previously separate components (motor and gear unit with pulley) into one unified structure, thereby reducing device complexity.
Solution Approach 2:
The gear unit is extracted from the system. By removing the intermediate gear reduction mechanism and directly coupling the motor output shaft to the belt pulley, the patent simplifies the overall construction while maintaining operational rotational speed requirements.
3Volume of moving object
If a cylindrical motor shape is used, then the motor can be compact, but the installation environment cannot optimally utilize the available space
Solution Approach 1:
The motor unit is designed with an asymmetric cuboidal shape rather than a traditional cylindrical form. This asymmetric geometry allows the motor to be optimally positioned within the available installation space, enabling better space utilization in the door system's support profile while maintaining compact dimensions.
4Speed
If a worm gear is used to reduce rotational speed, then the speed reduction is achieved, but the construction space requirement increases
Solution Approach 1:
The worm gear mechanism is extracted or removed from the system. The patent implements direct coupling between the motor output shaft and the belt pulley, eliminating the space-consuming worm gear while maintaining the motor's high rotational speed capability for driving the door system.
Solution Approach 2:
The motor unit and belt pulley are merged into a direct-drive configuration. By attaching the pulley directly to the output shaft without intermediate gear reduction, the patent eliminates the need for the worm gear and its associated construction space requirements.
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 cuboidal motor unit design allows for a high integration density and power density, enabling efficient acceleration and deceleration of heavy door elements while minimizing space requirements, thus achieving a compact and low-noise door drive system.
Implementation Method 1
a motor unit with a housing, in which a stator is stationarily received and wherein a rotor is arranged so as to be rotationally-movable in the housing and includes an output shaft
Data Source
AI summary
A door drive for arrangement on or in connection with a door system, wherein at least one leaf element of the door system is movable, including a motor unit with a housing, in which a stator is stationarily received, and wherein a rotor is arranged so as to be rotationally-movable in the housing and includes an output shaft, wherein the output shaft can be brought into operative connection in a driving manner with the leaf element. The motor unit has the basic shape of a cuboid, which is formed at least by two housing halves connected to each other.