Door Drive Adjustment Device with Uniaxial Rotary Sliding Element
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Solution Overview
Problem
Existing door drive adjustment devices do not ensure safe operation during power failures, as they rely on electrical components for functionality.
Innovation Solution
A door drive adjustment device featuring a uniaxial rotary sliding element with a planetary gear, a cartridge with interchangeable threads, and an electric motor-driven spindle, allowing for manual operation in case of power loss, with a decoupling mechanism using a release spring or actuator for automatic or manual control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an electric motor-driven planetary gear system is used for automatic door adjustment, then automation and convenience are improved, but reliability during power failures deteriorates
Solution Approach 1:
The system dynamically switches between automated motor-driven operation and manual operation modes. The planetary gear system can operate in driven mode during normal conditions and in free-wheeling mode during power failures, allowing the mechanism to adapt its behavior based on operational requirements and power availability.
Solution Approach 2:
The planetary gear system acts as an intermediary between the electric motor and the door, providing a mechanical pathway that allows both automated and manual operation. The differential mechanism serves as a mediator that can accommodate both motor-driven torque and manual forcing torque, enabling seamless transition between power sources.
2Device complexity
If a fixed transmission ratio gear system is used, then structural simplicity is improved, but adaptability for different adjustment speeds deteriorates
Solution Approach 1:
The transmission ratio dynamically changes based on the operational state. During normal automated operation, the system uses a higher reduction ratio for precise control. During power failures when manual operation is required, the differential mechanism allows for a lower effective reduction ratio, enabling faster manual adjustment without requiring additional gears or complex mechanisms.
Solution Approach 2:
The planetary gear system serves multiple functions: it provides automated drive during normal operation, enables manual operation during power failures, and offers variable effective transmission ratios for different speed requirements. This single mechanism replaces what would traditionally require multiple fixed-ratio gearsets or a gearbox.
3Ease of operation
If the output sleeve is allowed to move axially during rotation, then ease of operation is improved, but manufacturing precision deteriorates
Solution Approach 1:
The system dynamically adjusts the constraints on the output sleeve based on operational needs. During automated motor-driven operation, the output sleeve is constrained axially to ensure precise rotary movement for accurate door positioning. During manual operation mode, the constraints are relaxed to allow axial movement, making manual adjustment easier without compromising precision.
Solution Approach 2:
The output sleeve's movement characteristics are segmented into different operational modes: during automated operation, axial movement is restricted while rotation is controlled; during manual operation, axial movement is permitted. This segmentation allows the system to optimize for precision when needed and for ease of operation when needed, without compromising either function.
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
Enables safe and reliable operation of doors, gates, or windows during power failures by allowing manual operation and automatic adjustment, ensuring continued functionality and safety.
Implementation Method 1
The drive is connected to a mount and a drive spindle via a planetary gear
Implementation Method 2
at least one twisted inner groove is provided on the output sleeve, which engages with a twisted outer thread of the cartridge
Implementation Method 3
The automatic coupling or also the automatic decoupling takes place by means of a release spring or an edge return spring
Data Source
Figure 1
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AI summary
An adjustment device for a door with a drive (1) shall be characterized by a rotary sliding element (D, D1) arranged uniaxially with the drive (1).