Elevator Motor Connector Cover Shielding Design
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Solution Overview
Problem
Electric connectors in elevator systems are prone to damage from mechanical impacts and liquid penetration, leading to potential short circuits and malfunction.
Innovation Solution
A protective cover is designed to encase the electric connectors, featuring a metal construction for electromagnetic shielding, with a flange to prevent liquid ingress and a U-shaped sectional contour for easy mounting, ensuring the connectors are safeguarded from mechanical harm and liquid exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electric connectors are exposed for easy connection, then ease of operation is improved, but reliability deteriorates due to mechanical impact and liquid damage
Solution Approach 1:
The electric connector is nested within a recess in the housing, which is further protected by a cover that can be placed over the housing. This nested structure allows the connector to remain accessible for connection while being physically protected from mechanical impacts and liquid exposure.
Solution Approach 2:
The cover acts as an intermediary element between the external environment and the electric connector. It provides a protective barrier that shields the connector from harmful factors while still allowing the connection function to be performed when the cover is in place.
2Reliability
If electric connectors are protected from mechanical impact and liquids, then reliability is improved, but device complexity increases due to additional protective structures
Solution Approach 1:
The cover serves multiple functions simultaneously: it protects the electric connector from mechanical impact, shields against liquid exposure, and can be integrated with the housing structure. This multi-functionality reduces the need for separate protective components, thereby limiting the increase in device complexity.
Solution Approach 2:
The protective cover is merged with the housing structure, where the housing itself provides part of the protection through its recess design. This integration combines the protective functions into a unified structure rather than adding separate, complex protective systems.
3Reliability
If the housing is made of metal for electromagnetic shielding, then reliability is improved, but weight increases
Solution Approach 1:
Metal material is applied locally only to the housing structure where electromagnetic shielding is required, rather than making the entire device heavy. The cover and other components can use lighter materials, achieving selective electromagnetic protection without excessive weight increase.
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 cover effectively shields electric connectors from mechanical impacts and liquid exposure, enhancing the reliability and durability of elevator systems by preventing damage and electrical failures.
Implementation Method 1
The cover and the bottom plate may be made of metal for shielding electromagnetic emissions which are generated when the electric motor is operated.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An electric motor (20) for an elevator system (2) comprises a housing (25) extending in a longitudinal direction along a longitudinal axis (A) and a cover (22) attached to a front face of the housing (25). The cover (22) comprises an open space (24) formed around the longitudinal axis (A). At least one electric connector (38, 40), which is electrically connectable with component of the electric motor (20), is arranged within said open space (24).