Elevator Brake Disc Release Mechanism for Low-Force Rescue Docking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During emergency braking of an elevator, the car may stop between two floors, making it difficult to evacuate passengers quickly, and releasing the brake disc requires a high force.
Innovation Solution
A brake disc release device with an actuating mechanism, gear, sliders, and pulling cables that allows for the simple and effective release of the brake disc by magnifying the applied force, combined with a turning device to safely dock the elevator car at a desired floor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a high force is applied to the brake disc to release it, then the brake disc can be released, but the operation becomes difficult and complex
Solution Approach 1:
A pulling cable is introduced as an intermediary between the operator and the brake disc. The cable transmits the pulling force from the operator to the brake disc, allowing for controlled and effective force application without requiring the operator to directly apply high force to the disc
Solution Approach 2:
The solution changes the dimension of force application by using a cable system that can transmit force over distance and around obstacles. Instead of directly pushing or pulling the brake disc, the force is applied through a cable that can be routed conveniently, transforming the operational approach from direct mechanical contact to remote force transmission
2Ease of operation
If the brake disc is released to move the car to a safe floor, then passenger evacuation is enabled, but the device complexity increases
Solution Approach 1:
The release mechanism is extracted as a separate, dedicated device rather than being integrated into the existing brake system. This allows for a specialized, simplified design focused solely on the release function, using basic mechanical components like cables, pulleys, and levers that can be independently operated
Solution Approach 2:
The release system is segmented into distinct functional components: the pulling cable for force transmission, pulleys for force multiplication and direction change, and a release mechanism for actuating the brake. This segmentation allows each component to be simple and independent, reducing overall device complexity while maintaining effectiveness
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 prompt and safe evacuation of passengers by allowing the elevator car to be docked at a safe floor, even when stopped between floors, through the efficient release of the brake disc and controlled movement of the elevator car.
Implementation Method 1
a gear connected to the first end of the actuating mechanism; a first slider capable of sliding along a first guide piece and comprising a rack portion for engagement with the gear
Implementation Method 2
a first slider capable of sliding along a first guide piece and comprising a rack portion for engagement with the gear and a first wedge portion; a second slider capable of sliding along a second guide piece and comprising a second wedge portion for engagement with the first wedge portion of the first slider
Implementation Method 3
the actuating mechanism is rotated to drive the gear to rotate, drive the first slider to move in a first direction by means of the engagement between the gear and the rack portion of the first slider, drive the second slider to move in a second direction by means of the engagement between the first wedge portion of the first slider and the second wedge portion of the second slider, and thus drive the pulling cable to pull the brake disc
Data Source
AI summary
A turning device includes a hand disc coupled to an input shaft; a reduction gear set accommodated in a housing and connected to the input shaft and an output shaft; and a shaft connector for connecting the output shaft and a motor spindle.