Lift Gate Emergency Opening Mechanism for Power Failure Operation
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Solution Overview
Problem
Existing overhead doors with electric motors become inoperable during power failures, preventing the opening and closing of lifting gates, which is a critical issue in emergency situations.
Innovation Solution
A purely mechanical emergency opening device for lifting gates, comprising a driver, elongated drive element, and locking element, which can be selectively connected to the drive unit, allowing the gate to be opened using muscle power or a battery-powered motor without external energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If an electric motor is used as the drive mechanism for the lifting gate, then the gate can be opened and closed automatically, but the gate becomes inoperable during power failures
Solution Approach 1:
The drive system is segmented into two independent parts: the electric drive mechanism for normal operation and the manual emergency drive mechanism. The emergency drive includes a driver rotatably mounted on the inner shaft, an elongated drive element (belt or chain), and a locking element. This segmentation allows the gate to have both automated functionality and independent manual operation capability when the electric drive fails.
Solution Approach 2:
The emergency drive mechanism is pre-positioned and pre-configured within the drive unit housing. The driver is rotatably mounted on the inner shaft in advance, the elongated drive element is pre-installed to connect the driver to the hollow shaft, and the locking element is ready to prevent unintended movement. This preliminary preparation ensures that the emergency mechanism can be activated immediately during power failures without requiring additional assembly or setup.
2Reliability
If a purely mechanical emergency drive is added to the drive unit, then the gate can be operated during power failures, but the device complexity increases
Solution Approach 1:
The emergency drive mechanism is merged with the existing drive unit housing and integrated around the inner shaft. The driver is mounted directly on the inner shaft, the elongated drive element connects the driver to the hollow shaft, and the locking element is incorporated into the assembly. This merging approach allows the emergency mechanism to share space and structural elements with the electric drive, minimizing the increase in overall device complexity while ensuring reliable emergency operation.
3Adaptability or versatility
If the driver is rotatably mounted on the inner shaft and selectively connected to the drive unit, then the emergency drive can be engaged or disengaged, but the mechanism requires additional locking and connection elements
Solution Approach 1:
The connection between the driver and the drive unit is made dynamic rather than static. The locking element can be moved between locked and unlocked positions, allowing the driver to be selectively engaged or disengaged from the inner shaft. This dynamic connection enables the emergency drive to be activated only when needed, providing adaptability while keeping the complexity of locking and connection elements minimal through simple movable locking mechanisms.
Data Source
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AI summary
The invention relates to an emergency open device for a lifting gate. The emergency lifting device has a driver, a movement element, an elongated drive means, and a blocking element. The driver can be rotatably mounted on a rotationally fixed inner shaft of a drive device of the lifting gate and is configured to be selectively connected to the drive device. The elongated drive means is connected to the movement element and is designed to transmit a movement produced by the movement element to the driver. The movement element is an elastic element for sample, which is pretensioned in a standby position and is configured to relax and drive the elongated drive means by means of the tension energy released when the blocking element is released.