Elevator Drive Unit with Asymmetric Rollers for Belt Guidance
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Solution Overview
Problem
Elevator installations with support belts experience twisting and additional diagonal tension due to laterally offset rollers, leading to inefficient space utilization and increased stress on support means.
Innovation Solution
A drive unit with dual drive unit rollers on a common rotational axis, where the circumferential speeds of these rollers differ, allowing for a compact, space-saving arrangement that reduces support force and enables efficient distribution of drive power, preventing twisting of support means and minimizing diagonal tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If laterally offset rollers are used to guide support belts, then space utilization is improved, but the support belts experience twisting and additional diagonal tension
Solution Approach 1:
The patent applies asymmetry by using drive unit rollers with different diameters on the same rotational axis, creating different circumferential speeds. This asymmetric configuration allows the support belt to be guided without twisting while maintaining compact space utilization, resolving the contradiction between space efficiency and belt integrity
Solution Approach 2:
The patent changes the parameter of roller diameter to create different circumferential speeds on the same rotational axis. By varying the diameter parameter, the system achieves proper belt guidance without twisting or excessive tension, while maintaining compact dimensions for efficient space utilization
2Ease of operation
If support belts are used as support means, then smooth operation is achieved, but they are exposed to additional diagonal tension due to roller arrangement
Solution Approach 1:
The asymmetric arrangement of drive unit rollers with different diameters eliminates the lateral offset that causes diagonal tension. The support belt runs parallel to the rotational axis without twisting, maintaining smooth operation while reducing diagonal tension and extending belt service life
3Area of stationary object
If compact arrangement of rollers is implemented, then space utilization is improved, but support belts may be exposed to twisting
Solution Approach 1:
The asymmetric drive unit roller configuration with different diameters allows compact arrangement without twisting the support belt. The belt is guided parallel to the rotational axis, maintaining stability and preventing twisting while achieving space-efficient design
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 solution achieves a compact, space-saving elevator installation design with reduced support force and diagonal tension, enabling efficient operation and longer service life of support belts by ensuring proper guidance and distribution of drive power.
Implementation Method 1
The at least one support means is drivable by way of the drive unit, whereby the two travel bodies can be supported and moved
Data Source
AI summary
A drive unit for an elevator installation having a first traveling body and a second traveling body, which traveling bodies are supported by a support device, drives the support device and thus the two traveling bodies. The two traveling bodies each have at least one first support roller by which the support device supports the traveling bodies, at least partially. The drive unit includes at least one first and one second roller arranged on a common axis of rotation of the drive unit, wherein at least one of the first or second rollers is a drive unit roller for driving the support device. On the way from the first traveling body to the second traveling body, the support device is guided over the first drive unit roller and over the second drive unit roller. The guidance is hereby such that the circumferential speeds of the two drive unit rollers vary.