Segmented Elevator Sheave Liner for Fast Replacement and Traction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Elevator sheave liners in existing technologies require improvements in structure, performance, installation, replacement, and maintenance operations, as well as manufacturing costs.

Innovation Solution

The elevator sheave liner is designed with combinable segments featuring concave-convex structures that engage with the elevator sheave, allowing for stable installation and easy replacement, and includes a bracket structure for reusable segments to maintain traction force.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a traditional elevator sheave liner is used, then the structure is simple, but the installation and replacement operations are difficult and time-consuming

Engineering Contradiction:

Improveinstallation and replacement operationsVSAvoidliner structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The sheave liner is divided into multiple detachable segments that can be independently installed and removed. Each segment includes engagement structures that allow for modular assembly on the sheave, enabling easy installation and replacement without requiring complete disassembly of the entire liner system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The liner incorporates movable adjustment mechanisms that allow the segments to be dynamically positioned and secured on the sheave. The engagement structures include movable components that facilitate easy installation and removal while maintaining stable operation during elevator use.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the sheave liner structure is made more complex to improve performance, then the performance and reliability improve, but the manufacturing cost increases

Engineering Contradiction:

Improveliner performanceVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

By segmenting the liner into standardized modules, each segment can be manufactured independently using conventional processes, reducing overall manufacturing complexity. The modular design allows for selective replacement of only worn segments rather than the entire liner, improving cost-effectiveness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The detachable segment design enables individual segments to be replaced when worn while retaining the functional segments. This extends the overall service life of the liner system and reduces material waste, improving manufacturing efficiency and reducing costs.

Inventive Principle:

Principle #34Discarding and recovering

3Ease of repair

If the sheave liner is designed as a single piece, then the structure is simple, but the maintenance operations are difficult and downtime increases

Engineering Contradiction:

Improvemaintenance operationsVSAvoidliner structure

Core Design Contradiction:

Ease of repairVSDevice complexity

Solution Approach 1:

The liner is divided into multiple detachable segments that can be independently accessed and maintained. This segmentation allows maintenance personnel to work on specific segments without removing the entire liner, significantly reducing maintenance downtime and improving ease of repair.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Worn or damaged segments can be individually replaced while the remaining functional segments stay in place. This selective replacement capability simplifies maintenance operations and reduces the time the elevator system remains out of service.

Inventive Principle:

Principle #34Discarding and recovering

4Duration of action of stationary object

If traditional sheave liners are used, then the manufacturing cost is lower, but the lifespan of components is shorter and wear between components increases

Engineering Contradiction:

Improvelifespan of componentsVSAvoidmanufacturing cost

Core Design Contradiction:

Duration of action of stationary objectVSEase of manufacture

Solution Approach 1:

The liner segments incorporate composite material construction that combines different materials to optimize both wear resistance and cost-effectiveness. This composite approach extends component lifespan by reducing wear between the liner and tension members while maintaining reasonable manufacturing costs through selective material application.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The modular segment design allows for extended overall system lifespan by enabling selective replacement of worn segments while retaining functional ones. This approach maximizes the utilization of durable materials and reduces the frequency of complete liner replacements.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS20250346455A1Elevator sheave liner, elevator sheave assembly, and elevator system

Publication Date: 2025.11.13 OTIS ELEVATOR CO

AI summary

An elevator sheave liner, an elevator sheave assembly, and an elevator system are disclosed. The elevator sheave liner includes two or more combinable segments arranged in a combinable manner on an elevator sheave to form an elevator sheave liner for engagement with an elevator tension member, at least one of the combinable segments is provided with a first concave-convex structure along a transverse direction on a bottom of the at least one of the combinable segments, the first concave-convex structure matching a second concave-convex structure arranged transversely on an outer circumferential surface of the elevator sheave to engage correspondingly with each other when the at least one combinable segment is arranged on the elevator sheave.