Brake Catching Device Controlled Deactivation
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Solution Overview
Problem
Existing safety brake devices for conveying means, such as elevator cabins, experience abrupt and noisy transitions to their active position when current is interrupted, leading to potential damage and reliability issues.
Innovation Solution
A safety brake device with an electrically controllable actuation arrangement that moves the trigger element between passive and trigger positions, allowing for controlled switching operations and reducing noise and material stress during deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If current is interrupted to deactivate the safety brake device, then energy consumption is reduced, but abrupt and noisy transitions occur causing potential damage
Solution Approach 1:
The trigger element is moved to the trigger position while the actuation arrangement is still active (preliminary action), and only then is the power supply deactivated. This sequence ensures that the transition to the passive state occurs under controlled conditions rather than through abrupt current interruption, eliminating noise and damage while maintaining energy efficiency.
2Loss of energy
If current is interrupted to deactivate the safety brake device, then energy consumption is reduced, but noise emission increases
Solution Approach 1:
The trigger element is positioned at the trigger position before current interruption occurs. This preliminary positioning ensures that when the actuation arrangement is deactivated, the transition to the passive state is smooth and controlled, eliminating the abrupt mechanical movements that generate noise, while still achieving energy reduction through deactivation.
3Loss of energy
If current is interrupted to deactivate the safety brake device, then energy consumption is reduced, but material stress increases
Solution Approach 1:
The trigger element is moved to the trigger position while the actuation arrangement remains active, providing controlled support. Only after this preliminary positioning is complete is the power supply interrupted. This sequence ensures that the transition to the passive state occurs under controlled conditions, preventing abrupt material stress and potential damage while still achieving energy reduction through deactivation.
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 solution ensures a soft and material-protecting deactivation of the safety brake device, reducing noise emission and enhancing reliability by providing a controlled transition to the passive state.
Implementation Method 1
electrically controllable actuation arrangement which causes the trigger element to be movable between a passive position and a trigger position
Data Source
AI summary
In a safety brake device for a conveying device, a brake shoe is designed to engage at a rail arranged parallel to the conveying route in a stationary manner when the device is triggered. An engagement lever on the rail side opposite the shoe is pivotable between a release position and at least one brake position. In the brake position, the rail is clamped between the end of the engagement element and the shoe. The engagement element is pivotable using a trigger lever, so that, in each brake position of the trigger lever, the engagement element is also in a brake position. The trigger element is mounted to be displaceable along or parallel to its longitudinal axis and has a first end position in the vicinity of the rail and another end position at a distance from the rail. An electrically controllable actuation arrangement prevents or causes this displacement.