Escalator Drive Unit Mounted on Carrier Frame
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Solution Overview
Problem
Conventional passenger transport devices like escalators and moving walks require large, stable support structures to manage high loading forces, which limits their compactness and accessibility for maintenance, especially in space-constrained areas.
Innovation Solution
A passenger transport device design where the drive unit, comprising a motor, gear, and drive shaft, is attached to a carrier with a detachable frame that directs forces into the carrier, eliminating the need for a surrounding support structure, allowing for smaller dimensions and easier maintenance access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a stable support structure surrounding the drive is used, then the structural stability is improved, but the device dimensions increase
Solution Approach 1:
The support structure is segmented into a frame with selective support elements rather than a complete surrounding structure. The frame provides stability where needed while leaving the drive area partially open, reducing overall device dimensions while maintaining structural integrity.
Solution Approach 2:
The support structure provides localized stability through strategically positioned support elements rather than uniform surrounding support. This allows the drive to be accessible while maintaining structural stability at critical points, resolving the contradiction between compactness and stability.
2Strength
If a surrounding support structure is used, then the force absorption capability is improved, but the accessibility for maintenance deteriorates
Solution Approach 1:
The support structure is divided into a frame with openings that allow maintenance personnel to access the drive components. The frame provides force absorption capability while the segmented design with gaps enables easy access for maintenance activities.
Solution Approach 2:
The frame acts as an intermediary structure that transmits forces to the carrier while allowing access to the drive. It mediates between the need for force absorption and the need for maintenance accessibility by providing a structural framework with intentional access points.
3Stability of the object's composition
If a complete carrier surrounding the drive is used, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
The carrier design is segmented to provide support where needed rather than completely surrounding the drive. This reduces the number of components and simplifies the overall structure while maintaining adequate structural stability for force absorption.
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a passenger transport device (200), in particular an escalator or a moving walkway, having transport elements (251) Iinterconnected to form an endless belt (250) and a drive (230) for the transport elements (251), wherein the drive (230) comprises at least a motor (231), a transmission (233) and a drive shaft (240) functionally connected by the transmission (233) to the motor, the transport elements (251) interconnected to form an endless belt (250) are guided by means of the drive shaft (240) and can be moved by the drive shaft (240), a carrier (210) in which the transport elements (251) interconnected to form an endless belt (250) are arranged in such a way that they can be guided, the drive (230) is arranged on a frame (245), and the frame (245) is mounted on the outside of the frame (210). The invention also relates to a method for mounting a passenger transport device.