Electric Motor Casing O-Ring Seal Retaining Pins
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Solution Overview
Problem
Existing electric motor casings for fans face challenges in achieving effective water- and humidity-proofing due to complex assembly processes and structural complications caused by seal insertion, which can lead to electrical issues from environmental humidity and temperature variations.
Innovation Solution
The use of an O-ring type seal with retaining means, such as elastomeric retaining rings, that are easily applied to one part of the casing, allowing for simple and economical assembly while providing a secure seal against liquids and humidity by expanding sideways for effective sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a seal is inserted between the two parts of the motor casing to achieve water- and humidity-proofing, then the sealing effectiveness is improved, but the device complexity increases
Solution Approach 1:
The seal is integrated with one of the casing parts (either the cup-shaped part or the lid) to form a single unified component. This merging eliminates the need for separate seal installation steps and reduces structural complexity while maintaining effective sealing against water and humidity.
Solution Approach 2:
The seal is pre-mounted or pre-positioned on one of the casing parts before final assembly. This preliminary action ensures correct seal positioning is achieved automatically during assembly, eliminating the need for complex alignment procedures and reducing overall device complexity.
2Reliability
If a seal is inserted between the two parts of the motor casing to achieve water- and humidity-proofing, then the sealing effectiveness is improved, but the ease of manufacture decreases
Solution Approach 1:
By combining the seal with one casing part into a single integrated component, the manufacturing process is simplified. The integrated design allows for streamlined production where the seal and casing part can be manufactured together or pre-assembled, reducing the number of separate manufacturing steps and improving ease of manufacture.
Solution Approach 2:
The seal is pre-positioned or pre-mounted on one casing part during manufacturing. This preliminary action ensures that during final assembly, the seal is already in its correct position, eliminating complex alignment procedures and making the assembly process simpler and more economical.
3Reliability
If the seal must be correctly positioned between the two parts with suitable housings, then the sealing effectiveness is improved, but the ease of operation decreases
Solution Approach 1:
The seal is merged with one casing part to form an integrated unit. This eliminates the need for separate seal positioning operations during assembly, as the seal is already fixed to its casing part. The assembly process becomes simpler while maintaining effective sealing.
Solution Approach 2:
The seal is pre-positioned on one casing part before assembly. This preliminary positioning action ensures that during final assembly, the seal is automatically placed in the correct position without requiring complex alignment procedures, thereby improving ease of operation while maintaining sealing effectiveness.
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 solution simplifies the assembly process, reduces production costs, and ensures a reliable water- and humidity-proof seal, preventing electrical issues caused by environmental conditions.
Implementation Method 1
a static seal (7) in the form of an O-ring seal, made of an elastomeric material, operating frontally between the cup-shaped part (5) and the lid (6)
Data Source
AI summary
The invention relates to an electric motor for electric fans having a casing with at least a lid with a hermetic seal and a method for assembly of the motor. The motor (1) has a casing (2) consisting of a cup-shaped part (5) and a lid (6) and an O-ring seal (7) inserted between them, the seal (7) comprising retaining means (8) so that it remains applied to one of the elements, either the lid (6) or the cup-shaped part (5). The method for assembly includes the steps of inserting an O-ring seal (7) in a seat (10) in the lid (6) or in the cup-shaped part (5), the O-ring seal (7) having retaining rings (11); and inserting each retaining ring (11) on a respective fixing pin (15) present in the lid (6) or in the cup-shaped part (5), so that the seal (7) remains positioned in the seat (10) applied to one of the elements, either the lid (6) or the cup-shaped part (5).