Machine Roomless Elevator Drive System Integration
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Solution Overview
Problem
Conventional machine room-less elevator systems face challenges in minimizing both horizontal and vertical space requirements while maintaining efficient shaft utilization and good driving behavior, often requiring excessive space due to the arrangement of guide rails and the placement of the drive system.
Innovation Solution
The elevator system features a drive system attached to the elevator car with suspension means guided in two strands over a driving body, allowing for central suspension and minimizing space requirements by positioning the counterweight between these strands, eliminating the need for additional space at the top of the shaft and reducing torque loads on the car.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the drive system is located at the top of the elevator shaft, then the elevator car can be suspended centrally, but the space requirements in the shaft increase both horizontally and vertically
Solution Approach 1:
The drive system is merged with the elevator car structure, attaching it directly to the car instead of placing it separately in the shaft. This integration eliminates the need for additional shaft space while maintaining central suspension capability
Solution Approach 2:
The drive system is repositioned from a vertical arrangement (at the top of the shaft) to a horizontal arrangement (attached to the car side), changing the spatial dimension of placement to reduce shaft space requirements
2Ease of operation
If the guide rails are arranged on both sides of the elevator car, then the car is centrally suspended, but the shaft width increases
Solution Approach 1:
One of the two guide rail arrangements is extracted/removed, leaving only guide rails on one side of the elevator car. This reduction in guide rail configuration decreases the required shaft width while the drive system provides the necessary suspension forces
3Area of stationary object
If the drive system is attached to the elevator car, then the shaft space is reduced, but the counterweight and guide rail arrangement negatively impact shaft utilization
Solution Approach 1:
The counterweight is positioned asymmetrically on the same side as the guide rails rather than on the opposite side. This asymmetric arrangement optimizes the use of available shaft space by utilizing the empty space on the guide rail side and eliminates the need for deflection pulleys
4Stability of the object's composition
If deflection pulleys are mounted between the elevator car and counterweight, then the suspension is maintained, but additional space in the elevator shaft width is required
Solution Approach 1:
The deflection pulleys are completely removed from the system. The suspension is maintained through the direct arrangement of the counterweight and guide rails on the same side, eliminating the need for additional components that would require extra shaft space
Data Source
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AI summary
The invention relates to a lift system without a machine room, comprising • a lift cabin, which is guided in cabin guide rails, the cabin guide rails being disposed on one side of the lift cabin, • at least one counterweight, which is disposed on the same side of the lift cabin as the cabin guide rail, • a drive system mounted on the lift cabin and having at least one drive motor and at least one driving body, • one or more carrier means for transmitting a force from the drive system, • the carrier means being guided in two carrier means strands via the at least one driving body, and • the counterweight being disposed between the carrier means strands.