Door Drive Device With Auxiliary Spring Puller
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Solution Overview
Problem
Existing door drive systems face issues with reliable operation, maintenance requirements, and noise due to hydraulic damping, while electromechanical drives need constant electrical control and can fail without maintenance, leading to incomplete closure or door slamming.
Innovation Solution
A composite door drive system comprising a main drive and an auxiliary drive, where the auxiliary drive has a power transmission device with a linkage that can be automatically engaged and disengaged, using a slide arm and slide rail configuration to ensure secure closure and reduce maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic damping with bypass is used to ensure door closure, then the door can reach the closed position, but the door slams shut causing noise
Solution Approach 1:
The door drive system is divided into a main drive (hydraulic door closer) and an auxiliary drive (door puller with spring accumulator). The auxiliary drive segments the closing action by providing controlled pull force during the final closing phase, preventing the main drive from causing slamming while ensuring reliable closure.
Solution Approach 2:
The auxiliary door puller acts as an intermediary mechanism between the main hydraulic drive and the door leaf. It mediates the closing force by engaging only in the final closing phase, providing controlled assistance that prevents slamming while ensuring the door reaches the closed position reliably.
2Ease of operation
If electromechanical door drive is used to control opening and closing, then precise control is achieved, but regular maintenance and adjustments are required
Solution Approach 1:
The auxiliary door puller with spring accumulator is designed to automatically engage and disengage based on door position without requiring electrical control or adjustment. The mechanical self-regulating engagement mechanism eliminates the need for regular maintenance and adjustments while maintaining precise control.
3Extent of automation
If electric motor door drive is used for opening and closing, then automated operation is achieved, but complete standstill occurs upon failure
Solution Approach 1:
The system changes the operational parameters by combining a primary electric motor drive with a mechanical auxiliary drive using spring accumulator. When the electric motor fails, the spring accumulator provides alternative energy storage and release, maintaining door operation capability without complete standstill.
4Force
If manual door closer with hydraulic damping is used, then closing force is provided, but insufficient spring force prevents full closure
Solution Approach 1:
The system merges the main hydraulic door closer with an auxiliary door puller featuring a spring accumulator. The combined system consolidates the closing forces, with the auxiliary spring-driven puller providing additional force in the final closing phase to ensure the door reaches the closed position when the main spring force is insufficient.
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 system ensures secure door closure without slamming, reduces maintenance requirements, and provides reliable operation by automatically adjusting the drive engagement based on door position, enhancing the overall functionality and safety of the door drive mechanism.
Implementation Method 1
EP 2 468 998 A1 describes such a drive with an automatically engaging and disengaging linkage. Similar to a manual hydraulic door closer, the drive unit has a spring accumulator with a hydraulic damping device
Implementation Method 2
Common manual door closers with hydraulic damping typically employ a so-called hydraulic overrun
Data Source
Figure 1
Figure 2.1~2.2
Figure 2.3~2.4
AI summary
Disclosed is a door drive device, which is composed of a main drive (1) and an auxiliary drive (2). The aim is to obtain a drive which is practical and provides advantages to the door. In this respect, the drive assembly (2g) of the auxiliary drive (2) is configured as a drive assembly comprising a linear drive (2gks) and the drive assembly (2g) is mounted as an auxiliary drive in a pivot bearing (2gs) and the rod is configured as a sliding arm (2ka) and the rod bearing is configured as a slide rail (2ks).