Double-Decker Elevator Spindle Drive Mounting Through a Frame Cutout
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Solution Overview
Problem
Existing double-decker elevators face challenges in easily mounting and maintaining spindle drives, which are crucial for adjusting the vertical distance between cars to accommodate varying floor heights, and there is a need for a simpler and more accessible method for spindle drive installation and servicing.
Innovation Solution
A car arrangement for a double-decker elevator with a spindle drive mechanism that includes a fastening flange and a drive unit housed in a rotatable housing, allowing easy insertion and removal through a cutout in the support structure, and a damping element for vibration reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the spindle drive is placed onto the car frame from above during installation, then the spindle drive can be mounted in the elevator shaft, but the spindle drive becomes difficult to access and remove for maintenance purposes after installation
Solution Approach 1:
The support structure is segmented by providing a cutout that allows the housing to be divided into separable parts during maintenance. The housing can be split into a first part and a second part, enabling the spindle drive to be accessed and removed through the cutout without complete disassembly of the entire support structure.
Solution Approach 2:
The spindle drive is extracted from the housing through the cutout in the support structure. The first part of the housing is removed through the cutout, allowing the spindle drive to be taken out for maintenance while leaving the second part of the housing attached to the support structure.
2Ease of repair
If the housing is completely removed from the support structure for maintenance, then the spindle drive becomes accessible, but more components and space are required for disassembly and assembly operations
Solution Approach 1:
The housing is segmented into a first part and a second part, where only the first part needs to be removed through the cutout for maintenance. The second part remains attached to the support structure, reducing the overall space and number of components that need to be handled during maintenance operations.
Solution Approach 2:
Only the necessary first part of the housing is extracted through the cutout for maintenance access, rather than removing the entire housing. This minimizes the space required for maintenance operations while still providing adequate access to the spindle drive.
Data Source
AI summary
A car arrangement includes: a first car and a second car arranged one above the other in a car frame; wherein at least the first car is displaceable along the car frame in the direction of a vertical axis by a spindle drive; wherein the spindle drive includes a spindle and a drive unit; wherein the spindle drive is guided through a cutout in a support structure of the car frame, and the drive unit has a housing with a fastening flange fastening the housing to the support structure; and wherein the housing has first and second positions in relation to the cutout, the fastening flange exposing the cutout in the first position so the spindle drive can be guided through the cutout in the direction of the vertical axis, and the fastening flange projects beyond an outer edge of the cutout in the second position.