Adjustable Elevator Drive Frame Mounting
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Solution Overview
Problem
Elevator installations face challenges in varying support element spacing during modernization, requiring adaptable drive frames that maintain sufficient traction and reduce maintenance and installation complexity while avoiding reverse bending of the support element.
Innovation Solution
A drive frame with mounting devices for the drive roller and spacer roller that allow for adjustable positioning, ensuring a linear course of the support element and maintaining a high looping angle, reducing the risk of reverse bending and enabling easy adjustment and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the support element spacing is varied to adapt to different elevator installations, then the adaptability of the drive frame is improved, but the complexity of ensuring sufficient looping around the drive roller increases
Solution Approach 1:
The mounting devices for the drive roller and spacer roller are designed to be position-adjustable along the drive frame, allowing dynamic reconfiguration of the support element spacing. This enables the same drive frame to adapt to different elevator installations while maintaining proper looping geometry through adjustable rather than fixed positioning.
Solution Approach 2:
The drive frame is designed with multiple mounting positions and adjustable mounting devices that can accommodate various support element spacings. This universal design allows a single drive frame model to serve multiple elevator installations with different dimensional requirements, eliminating the need for multiple specialized frame designs.
2Adaptability or versatility
If the support element spacing is adjusted frequently during operation, then the adaptability is improved, but the maintenance outlay increases due to more movable parts
Solution Approach 1:
The mounting devices incorporate simple adjustment mechanisms that allow position changes along the drive frame. These mechanisms are designed to be easily operable and maintain stable positioning once adjusted, enabling spacing changes when needed while minimizing the complexity of movable parts that would require maintenance.
3Reliability
If the support element spacing is reduced to improve traction, then the looping around the drive roller is improved, but the risk of reverse bending of the support element increases
Solution Approach 1:
The system allows adjustment of the support element spacing as a variable parameter. By optimizing this spacing parameter within appropriate ranges, sufficient looping around the drive roller is achieved to ensure adequate traction, while avoiding excessive reduction that would cause reverse bending and damage to the support element.
Data Source
AI summary
An elevator installation comprises a drive frame and a drive unit, wherein a support element couples an elevator cage with a counterweight, wherein a drive roller and a spacer roller are mounted at the drive frame on a mounting device associated therewith, wherein the support element is guided over the spacer roller of the drive roller, wherein at least one of the mounting devices is fixable to the drive frame at at least two positions so that a horizontal support element spacing is thereby variable and wherein a portion of the support element between the drive roller and the spacer roller is substantially linear.