Cuboid Motor Unit for Compact Door Drive Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing door drives for automatic sliding doors are bulky due to the inclusion of gear units and cylindrical motors, which occupy unnecessary space and complicate design, making it difficult to achieve high integration and power density while maintaining a compact form.
Innovation Solution
A door drive design featuring a motor unit with a cuboid-shaped housing formed by two housing halves, accommodating a stator and rotor, allowing for direct connection to a leaf element via a toothed belt, and incorporating a stator with a ring-shaped structure and a heat transfer gap for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a gear unit is included in the door drive, then the motor can be designed as a high-speed motor, but the door drive becomes more complex and occupies more space
Solution Approach 1:
The patent extracts and removes the gear unit from the door drive system, transitioning to a direct-drive configuration where the motor unit directly drives the door leaf without speed-reducing mechanisms. This eliminates the complexity associated with gear units while maintaining high motor speed operation.
Solution Approach 2:
The motor unit and drive function are merged into a single integrated assembly. The motor unit directly couples to the drive mechanism, eliminating the need for separate gear units and reducing overall system complexity while maintaining driving capability.
2Volume of moving object
If a cylindrical motor is used, then the motor has a compact shape, but it occupies space that does not allow for optimal use of space in relation to its installation environment
Solution Approach 1:
The patent transitions from a cylindrical motor shape to a cuboid-shaped motor unit. This geometric change allows the motor to better fit into rectangular installation spaces and optimize the use of available volume, improving spatial efficiency in the installation environment.
Solution Approach 2:
The motor unit design changes from a two-dimensional cylindrical form to a three-dimensional cuboid form that can be more effectively integrated into the door drive housing and support profile, optimizing space utilization in all three dimensions.
3Area of stationary object
If the door drive is designed as compact as possible, then space is optimized, but high power density is required to accelerate and decelerate large leaf elements
Solution Approach 1:
The patent changes the motor operating parameters by eliminating the gear unit, allowing the motor to operate at higher speeds directly. This enables a smaller, more compact motor design while maintaining the power density required to accelerate and decelerate large leaf elements effectively.
4Speed
If a worm gear is used, then speed reduction is achieved, but it is very space-intensive, especially when combined with the motor
Solution Approach 1:
The patent removes the worm gear from the system, eliminating the space-intensive speed reduction mechanism. Instead, the motor operates directly at its optimal speed to drive the door, avoiding the volume penalty associated with worm gear assemblies.
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 design achieves high integration and power density with a compact form, enabling efficient operation and easy installation, while minimizing noise and optimizing space utilization for additional components like power supplies and controllers.
Implementation Method 1
a stator with a ring-shaped structure and a heat transfer gap for efficient heat dissipation
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The present invention relates to a door drive (100) for arrangement on or in connection with a door system, with which at least one leaf element of the door system can be moved, comprising a motor unit (1) with a housing (10) in which a stator (11) is stationary and wherein a rotor (12) is rotatably arranged in the housing (10) and has an output shaft (13), wherein the output shaft (13) can be brought into operative connection with the leaf element in a driving manner. According to the invention, the housing (10) is formed from two interconnected housing halves (14, 15), wherein the stator (11) is arranged internally in a first housing half (14) by means of first fastening elements (16) and wherein second fastening elements (17) are provided by means of which the second housing half (15) is arranged on the first housing half (14).