Motor Brake Magnet Wear Monitoring With Threshold Triggering
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Solution Overview
Problem
Current wear monitoring systems for motor brake devices require manual measurement, which is time-consuming, labor-intensive, and lacks reliability, posing safety concerns and high labor costs.
Innovation Solution
A wear monitoring system that automatically tracks the wear state of a brake magnet by using a support, arm portions, and a trigger device, which activates when the wear reaches specific thresholds, eliminating the need for manual measurement and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual measurement is used for monitoring brake magnet wear, then the system structure remains simple, but the monitoring reliability is poor and labor cost is high
Solution Approach 1:
The brake magnet wear monitoring system uses the brake magnet itself as the measuring object and leverages its own movement relative to the brake disc to drive the monitoring mechanism. The brake magnet's wear directly affects the gap between it and the brake disc, which automatically drives the arm portion and trigger device without requiring external measurement tools or manual intervention.
Solution Approach 2:
The patent replaces manual measurement operations with an automatic mechanical triggering system. The arm portion converts the vertical movement of the brake magnet into horizontal movement of the trigger button, substituting human labor with a self-actuating mechanical mechanism that automatically monitors wear thresholds.
2Productivity
If manual measurement is used for wear monitoring, then the device complexity is low, but the productivity is reduced due to time-consuming manual operations
Solution Approach 1:
The trigger button is pre-positioned at specific locations corresponding to predetermined wear thresholds. As the brake magnet wears and moves closer to the brake disc, the gap automatically reduces, and when it reaches the threshold, the arm portion triggers the pre-positioned button without requiring any decision-making or measurement actions during operation.
Solution Approach 2:
The system uses the operational wear process itself to drive the monitoring function. The brake magnet's natural movement during braking operations automatically actuates the monitoring mechanism, converting the wear process into the monitoring action without requiring separate measurement operations.
3Reliability
If automatic trigger mechanism is implemented, then the monitoring reliability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The monitoring function is merged with the existing brake mechanism components. The arm portion serves both as a mechanical linkage and as the triggering mechanism, while the trigger button integrates with the brake assembly structure. This merging avoids adding completely separate monitoring subsystems.
Solution Approach 2:
The arm portion performs multiple functions: it acts as a mechanical connector between the brake magnet and trigger device, serves as a lever to amplify the small vertical movement of the brake magnet into sufficient horizontal movement of the trigger button, and provides structural support for the monitoring system.
Data Source
AI summary
The invention discloses a wear monitoring system for a brake device of a motor. The brake device includes a brake disc and a brake magnet movable relative to the brake disc. The wear monitoring system includes a first arm portion including a first free end and arranged to be moved with the brake magnet so that the first free end always contacts the bottom of the brake magnet, a second arm portion arranged to be moved with the first arm portion and including a second free end; and a trigger device including a trigger button that is triggered by the second free end of the second arm portion when the wear amount of the brake magnet reaches a first threshold or a multiple of the first threshold and when the brake magnet and the brake disc are in an attracted state. A motor and an elevator are also disclosed.