Modular Elevator Sheave With Replaceable Units
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Solution Overview
Problem
Commercial elevator sheaves have fixed groove numbers, leading to limited usage of drive elements, inconsistent speed causing slips, noise, and reduced lifespan, and are difficult to maintain and repair.
Innovation Solution
A modular elevator sheave design featuring a mandrel body with multiple sheave units that can be easily added or removed, each with a groove for drive elements, and equipped with abrasion resistance paddings and a seal ring for reduced friction and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple sheave units are arranged side by side on the mandrel body, then the strength and rigidity of the sheave are improved, but the device complexity increases
Solution Approach 1:
The sheave is divided into multiple independent sheave units (first sheave unit, second sheave unit, etc.) that can be arranged side by side on the mandrel body. Each sheave unit can be independently manufactured and replaced, reducing overall system complexity while improving strength through distributed load bearing.
2Manufacturing precision
If the number of grooves inside the sheave unit is fixed, then the manufacturing precision is improved, but the adaptability deteriorates
Solution Approach 1:
Instead of having a fixed number of grooves in a single sheave unit, the invention segments the sheave into multiple replaceable units, each with a fixed groove configuration. This allows the total number of grooves to be adjusted by adding or removing sheave units, maintaining manufacturing precision for each unit while providing system-level adaptability.
3Ease of repair
If the sheave units are designed to be replaceable individually, then the ease of repair is improved, but the device complexity increases
Solution Approach 1:
Each sheave unit is designed as an independent replaceable module with standardized mounting interfaces on the mandrel body. When one sheave unit becomes worn or damaged, only that specific unit needs to be removed and replaced, leaving other units in service. This modular segmentation greatly simplifies repair operations despite the increased number of components.
4Duration of action of stationary object
If abrasion resistance paddings are added between adjacent sheave units, then the duration of action is improved, but the device complexity increases
Solution Approach 1:
Abrasion resistance paddings are positioned between adjacent sheave units at the interfaces where they contact each other on the mandrel body. These paddings act as intermediary elements that reduce friction and wear between the sheave units during rotation, extending their service life while adding minimal structural complexity.
Data Source
AI summary
A modular elevator sheave comprises a mandrel body, wherein multiple sheave units are arranged side by side along the mandrel body, and wherein, the outer wall of the outer circumference of the sheave unit is provided with a groove. In this structural composition, the mandrel body with multiple sheave units, which increases the overall strength and rigidity of the sheave. Furthermore, the number of sheave unit used can be increase and decrease depending on the need or situation, and it should be noted that since the sheave unit can be replaced individually when damaged, it is easier to maintain and reduce repairing costs.