Elevator Control Cabinet Hoisting Mechanism
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Solution Overview
Problem
The installation and maintenance of large and heavy power converters in elevator control cabinets, particularly in high-speed and high-rise elevators, require significant manpower due to their weight and size.
Innovation Solution
A method involving the use of a pair of rails and rollers to hoist and position the electrical apparatus within the cabinet, allowing for easier assembly and maintenance by distributing the weight and reducing the necessary manual effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If heavy electrical apparatus (power converters) are installed directly into the elevator control cabinet, then the electrical apparatus can be securely positioned, but a considerable amount of manpower is required for installation and maintenance
Solution Approach 1:
The patent introduces an intermediary hoisting mechanism consisting of rails and rollers that mediates between the heavy electrical apparatus and the cabinet structure. This intermediary system allows the apparatus to be hoisted and positioned with reduced manual effort, resolving the contradiction between secure positioning and manpower requirements
Solution Approach 2:
The hoisting mechanism creates an equipotential condition by providing a guided path (rails) with rolling support (rollers) that reduces the effective weight burden during installation. The apparatus can be moved along the rails with minimal friction through the rollers, making handling easier while maintaining secure positioning
2Ease of manufacture
If heavy electrical apparatus are installed directly into the cabinet, then structural stability is maintained, but assembly and maintenance work becomes complex and labor-intensive
Solution Approach 1:
The rails and rollers serve as intermediary components that simplify the assembly process. The rails provide a predetermined installation path, and the rollers facilitate easy movement along this path, reducing assembly complexity while maintaining structural stability
Solution Approach 2:
The rails are pre-installed in the cabinet structure before the electrical apparatus is positioned. This preliminary action creates a prepared guide system that simplifies the subsequent installation of heavy apparatus, reducing both assembly complexity and labor requirements
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
This approach simplifies the assembly and maintenance of heavy electrical apparatuses by enabling a single person to handle and position them safely and efficiently, reducing the manpower required for installation and maintenance tasks.
Implementation Method 1
A pair of rollers (11) in a back part (13) of and on opposite sides of the electrical apparatus (2) are arranged such that the rails, via the rollers carry at least a part of the weight of the electrical apparatus (2)
Data Source
Figure 1~3
Figure 4A~4D
AI summary
The invention relates to an elevator control cabinet wherein the cabinet (1) provides a space (3) which is enclosed by walls (4, 5) and a roof (7). One of the walls (4, 5) consists entirely or partly of a removable cover or a door covering an access opening (6) into the space (3). An electrical apparatus (2) is provided in the space (3), the apparatus has a front part facing (12) the access opening (6) and a back part (13) facing away from the access opening (6). In order to simplify assembly and disassembly of the cabinet, a pair of rails (9) are attached to one or more of the walls (4) to extend towards the access opening (6). The electrical apparatus (2) comprises a pair of rollers (11) arranged to contact the pair of rails (9). At least one lifting element (14) is provided in an upper part of the electrical apparatus (2) at a location closer to the front part (12) than said pair of rollers (11), said lifting element (14) providing an attachment point for hoisting the electrical apparatus (2).