Elevator Car Brake Mount With Integrated Load Measurement
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Solution Overview
Problem
Existing elevator systems face challenges in effectively braking and measuring load changes in elevator cars, leading to potential position shifts and jerky movements due to load alterations, and existing solutions either require complex re-leveling processes or risk sudden position changes when brakes are released.
Innovation Solution
A braking device with a brake and load measuring device that allows for relative displacement between the brake and the elevator car, enabling simultaneous braking and load measurement by converting forces perpendicular to the displacement direction, using a load measuring device with a force transmission element and a holding arrangement that measures forces perpendicular to the brake's direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a brake is installed directly on the elevator car to hold it in position, then position stability is improved, but sudden position changes occur when the brake is released due to load changes
Solution Approach 1:
The patent introduces an intermediary mechanism (the brake holding arrangement with controlled displacement capability) between the brake and the elevator car. This intermediary allows the brake to move relative to the car in a controlled manner, absorbing load changes and preventing sudden position shifts when the brake is released.
Solution Approach 2:
The patent makes the brake holding arrangement dynamic by allowing controlled displacement of the brake relative to the elevator car in the direction of the braking force. This dynamic capability enables the system to adapt to load changes and maintain smooth operation during brake release.
2Stability of the object's composition
If re-leveling is implemented to compensate for position changes, then position stability is improved, but device complexity increases
Solution Approach 1:
The brake holding arrangement performs the re-leveling function automatically through its own controlled displacement mechanism. The system self-adjusts to load changes without requiring external re-leveling operations, thereby maintaining position stability while avoiding the complexity of additional re-leveling systems.
Solution Approach 2:
The patent merges the braking function and the load measurement function into a single integrated device. The load measuring device is incorporated into the brake holding arrangement, allowing simultaneous braking and load monitoring without adding separate complex systems.
3Measurement precision
If a load measuring device is added to measure load changes, then measurement capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the load measuring device with the brake holding arrangement into a single integrated unit. The force transmission element is incorporated into the existing brake structure, allowing load measurement without adding separate complex measurement systems.
Solution Approach 2:
The brake holding arrangement is designed to perform multiple functions: it holds the brake on the elevator car, allows controlled displacement for load measurement, and provides the braking function. This multi-functionality reduces the need for additional separate components.
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 device effectively brakes the elevator car and measures load changes, improving position stability and preventing jerky movements by adjusting the drive force to compensate for load changes, enhancing safety and operational efficiency.
Implementation Method 1
the brake can be displaced relative to the elevator car in a direction of force induced by the brake... a displacement of the brake in the direction of the force exerted by the brake generates a measuring force acting essentially perpendicular to the direction of the force exerted by the brake
Data Source
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AI summary
The invention relates to a brake device (15) for braking a movable elevator car (3) of an elevator system (1) and for measuring load changes produced in the elevator car (3). The brake device (15) has: at least one brake (17), preferably two brakes (17), for braking the elevator car (3) relative to a stationary component (14) of the elevator system (1); a brake holding arrangement (19) for holding the brake (17) on the elevator car (3); a load measuring device (21) having a force transmission element (25) for measuring a force acting on the force transmission element (25); and a load measuring device holding arrangement (23) for holding the load measuring device (21) on the elevator car (3).