Electric Gate Actuator Brake Release for Manual Power-Fail Opening
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Solution Overview
Problem
Existing electric gate actuators with brake mechanisms remain closed during power failures, requiring manual operation to unlock, which can damage or interfere with the actuator's normal functioning.
Innovation Solution
A mechanical uncoupling system that disengages the friction discs of the brake mechanism by sliding them apart against the biasing force, using a rod and worm drive mechanism, allowing manual operation without disassembling components between the electromotor and driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brake mechanism with friction discs is used to prevent unwanted gate movement, then the gate remains securely closed during power failures, but the gate cannot be manually opened without damaging or interfering with the actuator components
Solution Approach 1:
A rod is introduced as an intermediary element that transfers force from the manual operating mechanism to the friction discs. The rod engages with the friction discs and moves them apart against the biasing member's force, enabling manual gate operation without directly interfering with the electromotor or driver components. This intermediary mechanism resolves the contradiction by providing a safe manual override path.
2Ease of operation
If the mechanical uncoupling system disengages components between the electromotor and driver, then manual operation is enabled, but the actuator components may be damaged or wrongly re-engaged
Solution Approach 1:
The uncoupling mechanism extracts or disengages only the friction discs from the braking position, separating them from the rotor and stator assembly. This selective extraction allows manual operation while leaving the critical electromotor and driver components intact and properly positioned. The friction discs are the specific elements that need to be disengaged to enable manual operation, and this principle ensures only those elements are moved.
Solution Approach 2:
The rod serves as an intermediary that selectively engages and moves only the friction discs, preventing direct contact with and potential damage to the electromotor and driver components. This intermediary mechanism ensures that manual operation is enabled while protecting the integrity of the actuator's critical components.
3Reliability
If the brake mechanism remains engaged during power failure, then the gate cannot move accidentally, but manual operation requires complex disassembly of actuator components
Solution Approach 1:
The rod acts as a simple intermediary mechanism that provides a direct mechanical path to disengage the friction discs. Instead of requiring complex disassembly of the actuator components, the rod engages with the friction discs and moves them apart in a straightforward manner. This simplifies the uncoupling process while maintaining the passive brake function during normal operation.
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 reliable and simple manual operation of the gate during power failures without damaging the actuator components, ensuring smooth functioning and ease of access.
Implementation Method 1
two friction discs are urged together by the biasing member thereby creating a friction force between them. This friction prevents the rotation of the rotor even when a force is exerted on the gate
Implementation Method 2
a biasing member urging the friction discs against one another
Implementation Method 3
the mechanical uncoupling system engages one of the friction discs to move the frictions discs away from one another against the force of the biasing member
Implementation Method 4
an electromotor mounted on the frame, the electromotor comprising: a rotor, a stator
Data Source
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AI summary
An electric gate actuator for actuating a closure system having a first member and a second member that are moveable with respect to each other. The gate actuator comprises: a frame; an electromotor (5) mounted on the frame and comprising: a rotor, a stator and a brake mechanism which comprises: a first friction disc (39) rotatably fixed to the rotor, a second friction disc (40) rotatably fixed to the stator, and a biasing member urging the friction discs against one another; and a mechanical uncoupling system which engages one of the friction discs to move the frictions discs away from one another against the force of the biasing member.