Rope Elevator Mechanical Brake Backup System

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Solution Overview

Problem

Current rope type elevating devices face challenges in quickly and safely controlling the descending speed, especially when the electronic brake fails during operations in high-rise buildings, requiring significant muscle strength and posing risks during rescue situations.

Innovation Solution

A rope type lifting device equipped with both electronic and mechanical braking systems, where the mechanical braking system includes an unlocking lever, a connecting portion, a rotating body, and a stopper to adjust the pressing force on the rope, allowing for controlled descent even if the electronic braking system fails.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If only electronic braking system is used, then the device complexity is reduced, but the reliability deteriorates when electrical control fails

Engineering Contradiction:
Improvebraking system reliabilityVSAvoidbraking system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent implements a mechanical braking device as a backup system that is prepared in advance to compensate for potential electronic brake failure. The mechanical brake is designed to activate when the electronic braking system fails, providing a safety cushion that prevents complete loss of braking capability.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The patent applies different braking mechanisms for different operational requirements: electronic braking for normal operation and mechanical braking for emergency situations. Each braking system has its own specific characteristics optimized for its intended purpose, with the mechanical brake providing localized safety functionality.

Inventive Principle:
Principle #3Local quality

2Reliability

If mechanical braking system is added, then the reliability improves, but the device complexity increases

Engineering Contradiction:
Improvebraking system reliabilityVSAvoidbraking system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The mechanical braking device serves as a pre-prepared backup system that activates only when the electronic braking system fails. This beforehand cushioning ensures that even if the primary electronic system fails, the mechanical backup is already in place to provide necessary braking capability.

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The control unit acts as an intermediary that manages both the electronic and mechanical braking systems. It monitors the electronic brake status and automatically switches to or activates the mechanical braking system when failure is detected, coordinating the two different braking mechanisms seamlessly.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of operation

If electronic brake fails, then the ease of operation deteriorates, but the device complexity remains the same

Engineering Contradiction:
Improvebrake control easeVSAvoidbrake system reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The braking system is designed to be self-managing through the control unit that automatically detects electronic brake failure and switches to the mechanical braking system without requiring manual intervention. The system serves itself by monitoring its own status and activating the appropriate braking mechanism.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The control unit serves as an intermediary that automatically manages the transition between electronic and mechanical braking systems. When electronic brake failure is detected, the control unit mediates the switch to mechanical braking, maintaining ease of operation without requiring user awareness or action.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 ensures safe and efficient operation by providing a double safety mechanism, enabling controlled descent and reducing the risk of accidents, even in emergency situations where electrical control is impossible, by mechanically adjusting the rope's movement.

Implementation Method 1

a mechanical braking device for mechanically moving the conveying rope up and down

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11097135B2Rope type elevating device
Publication Date: 2021.08.24 KODUCT
  • US11097135B2 patent drawing
  • US11097135B2 patent drawing
  • US11097135B2 patent drawing

AI summary

The present invention relates to a rope type elevating device, and more particularly, to a rope type elevating device that can mechanically and safely control the falling speed even if a breakage occurs in the brake being electrically controlled during the elevating and descending operation.The rope type lifting device of the present invention comprising an electronic braking device for winding a conveying rope to move the rope up and down by using power, and a mechanical braking device for mechanically moving the conveying rope up and down, characterizes in that the mechanical braking device comprises: an unlocking lever being rotated by an external force within a predetermined rotation range; a connecting portion connected to the unlocking lever and moving forward by a predetermined amount in conjunction with the rotation of the unlocking lever; a rotating body that rotates by the amount of advancement of the connecting portion and adjusts a pressing force applied to the conveying rope; and a stopper for limiting the rotation range of the rotating body and supporting the pressing force applied to the rope by the rotating body.