Gate Drive Safety System with Automatic Blocking Mechanism
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Solution Overview
Problem
Existing security systems for high-speed lifting gates struggle to detect breakage of rotating traction means and react quickly to prevent uncontrolled lowering of the gate curtain, often requiring external energy sources and being less reliable.
Innovation Solution
A safety system with a rotating traction mechanism that includes a blocking member held in a normal position by a biasing device, which automatically shifts into a blocking position upon traction failure, using a motor console and pretensioning mechanism to engage with the driven wheel, ensuring immediate and independent blockage without external energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a blocking member is held in a normal position by a biasing device and automatically shifts into a blocking position upon traction failure, then the system provides fast reaction time and immediate blockage, but the system requires a reliable pretensioning mechanism that must maintain precise positioning under varying loads
Solution Approach 1:
The blocking member is pre-positioned in a normal operating position by the biasing device during normal operation. The pretensioning mechanism maintains the blocking member in this ready state, so that upon traction failure, the blocking member can immediately shift to the blocking position without requiring additional activation time or external energy sources.
2Device complexity
If the holding device is provided on a motor bracket of a drive motor, then the system structure is simplified and integration is improved, but the motor bracket must withstand additional forces and maintain positioning accuracy under dynamic conditions
Solution Approach 1:
The holding device is integrated directly onto the motor bracket, combining the functions of motor mounting and blocking member positioning into a single structural element. This integration eliminates the need for separate mounting structures and reduces the overall number of components, while the motor bracket is designed to withstand the additional forces through appropriate structural reinforcement.
3Loss of time
If the pre-tensioning device automatically releases the blocking member upon traction tearing, then the system operates independently of external energy sources, but the pre-tensioning mechanism must store sufficient energy to ensure reliable blocking against the driven wheel
Solution Approach 1:
The biasing device stores mechanical potential energy during normal operation by maintaining the blocking member in a pre-tensioned state. Upon traction failure, this stored energy is rapidly converted to kinetic energy, driving the blocking member into the blocking position with sufficient force to engage the driven wheel and prevent uncontrolled movement, all without requiring external energy sources.
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 effectively and reliably blocks the driven wheel upon traction failure, preventing crashes and ensuring operational safety by being independent of external energy sources and providing a fast reaction time, thus maintaining gate curtain stability.
Implementation Method 1
a pre-tensioning device (28) having a holding section (22) and a holding device (20), wherein the holding device (20) is designed and configured such that, at least in the event of a tearing of the traction means (13), it releases the blocking member (15), and the pre-tensioning device (28) displaces the blocking member (15) from the normal position into a blocking position
Implementation Method 2
the blocking member (15) has a blocking element (16), which, in a normal operating position in which the traction means (13) is intact, is disengaged from the driven wheel (10)
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a safety system (1) for a drive (50), which has a circulating traction mechanism (13), of a gate, in particular a lifting gate (100), more particularly a high-speed lifting gate (100), comprising a drive gear (11) and an output gear (10). A drive torque can be transmitted from the drive gear (11) to the output gear (10) by the traction mechanism (13), and the safety system (1) comprises a blocking element (15) that is not in engagement with the output gear (10) in a normal operating position, in which the traction mechanism (13) is intact, and is kept pretensioned in the normal position by means of a pretensioning device (28) and a holding device (20), wherein the holding device (20) is designed to release the blocking element (15) at least in the event of a break/tear of the traction mechanism (13), and the pretensioning device (28) moves the blocking element (15) out of the normal position and into a blocking position, in which at least the output gear (10) is blocked.