Ropeless Elevator Beam Climber Propulsion

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Conventional rope-based elevator systems limit the simultaneous operation of multiple elevator cars within a single elevator shaft, restricting capacity and efficiency.

Innovation Solution

A ropeless elevator system utilizing a beam climber mechanism with electric motors and traction belts that magnetically attract and rotate along guide beams, allowing multiple elevator cars to operate simultaneously within the same shaft.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional rope-based elevator systems are used, then the system structure is simple, but only one elevator car can operate in the shaft at a time

Engineering Contradiction:
Improvenumber of simultaneous elevator carsVSAvoidsystem structure
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent removes the counterweight component from the traditional rope-based elevator system. By extracting the counterweight, the system eliminates the mechanical constraint that limited shaft capacity to one car at a time, allowing multiple independent elevator cars to operate simultaneously while reducing overall system complexity

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical rope-and-counterweight system with a magnetic propulsion system using magnetic tracks and magnetic attraction/repulsion forces. This substitution enables multiple elevator cars to operate independently in the same shaft without mechanical interference, resolving the contradiction between productivity and device complexity

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If rope-based systems with counterweights are used, then the propulsion mechanism is simple, but multiple elevator cars cannot operate simultaneously

Engineering Contradiction:
Improvesimultaneous operation capacityVSAvoidenergy consumption
Core Design Contradiction:
ProductivityVSUse of energy by moving object

Solution Approach 1:

The magnetic propulsion system uses periodic magnetic attraction and repulsion cycles to propel elevator cars along the magnetic track. This periodic magnetic action enables efficient movement of multiple cars simultaneously without requiring continuous high energy input, as the magnetic fields are activated in alternating sequences

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system changes the physical state and properties by using magnetic fields instead of mechanical forces. By utilizing magnetic attraction and repulsion parameters, the system achieves efficient propulsion of multiple elevator cars with reduced energy consumption compared to traditional mechanical systems

Inventive Principle:
Principle #35Parameter changes

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 multiple elevator cars to move independently within the same shaft, enhancing capacity and operational efficiency while maintaining reliable and controlled movement.

Implementation Method 1

the first traction belt is magnetically attracted to the first guide beam

Methodology Applied
Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS11673773B2Ropeless elevator propulsion system
Publication Date: 2023.06.13 OTIS ELEVATOR CO
  • US11673773B2 patent drawing
  • US11673773B2 patent drawing
  • US11673773B2 patent drawing

AI summary

According to an embodiment, an elevator system including: a beam climber system configured to move an elevator car through an elevator shaft by climbing a first guide beam that extends vertically through the elevator shaft, the first guide beam including a first surface and a second surface opposite the first surface, the beam climber system including: a first wheel; a second wheel; a first traction belt wrapped around the first wheel and the second wheel, the first traction belt being in contact with the first surface; and a first electric motor configured to rotate the first wheel, wherein the first traction belt is configured to rotate when the first wheel rotates.