Sealing assembly on a housing of an electric drive motor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sealing solutions for electrical power transmission lines in electric vehicle motors are inadequate due to large component tolerances, making precise alignment and sealing difficult, especially with high-voltage applications.
Innovation Solution
A sealing assembly featuring a support bellows made of elastic material with cutouts for the power lines and screw connections to both the housing and the lines, along with an optional stabilizing inner ring, allowing for flexible compensation of component tolerances and secure mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional rigid sealing solutions are used, then sealing precision is improved, but adaptability to component tolerances deteriorates
Solution Approach 1:
The patent employs a bellows structure made of elastic material that can flex and deform to accommodate variations in component positioning due to manufacturing tolerances. The bellows acts as a flexible sealing element that maintains oil-tight sealing while adapting to misalignments between the housing aperture and line element, thus resolving the contradiction between sealing precision and adaptability to tolerances.
Solution Approach 2:
The elastic material of the bellows allows for dynamic changes in shape and volume parameters in response to assembly variations. The bellows can expand, contract, and deform elastically to compensate for tolerance accumulations, maintaining effective sealing without requiring precise manufacturing tolerances on the housing and line element components.
2Reliability
If precise alignment features are added to achieve sealing, then sealing reliability is improved, but device complexity deteriorates
Solution Approach 1:
The bellows structure provides inherent sealing capability through its flexible, deformable nature. Instead of requiring complex rigid alignment features, the bellows naturally conforms to the aperture and line element interface, achieving reliable sealing through its elastic properties while maintaining relatively simple device architecture.
Solution Approach 2:
The bellows structure is self-aligning and self-sealing to a degree. Its elastic properties allow it to automatically adapt to the interface geometry without requiring complex external alignment mechanisms, thus achieving reliable sealing while minimizing device complexity.
3Stability of the object's composition
If rigid fastening structures are used, then mounting stability is improved, but ease of assembly deteriorates
Solution Approach 1:
The flexible bellows structure can be installed without requiring precise alignment during assembly, as it will naturally deform to fit the aperture and line element interface. This ease of assembly is maintained while the elastic material provides stable mounting through its ability to maintain consistent sealing contact pressure.
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 solution provides a stable and secure mounting of high-voltage power lines while accommodating component variations, ensuring effective oil-tight sealing and simplified assembly.
Implementation Method 1
a support bellows made of elastic material and having a cutout for the passage of the line element
Implementation Method 2
for a screw connection of the support bellows to the housing... for a screw connection of the support bellows to the line element
Data Source
AI summary
A sealing assembly on a housing of an electric drive motor for both sealing a housing opening and supporting a line element which is designed for transmitting electrical power and has at least one electrical conductor. The sealing assembly has a support bellows made of a resilient material and having a recess for the passage of the line element or having one recess for the passage of each electrical conductor of the line element. The support bellows has outer fastening recesses for oil-tight fastening, in particular for a screw connection, of the support bellows to the housing, in particular via an outer ring. The support bellows may also have inner fastening recesses for connection of the support bellows to the line element. For this purpose, the line element has a mounting surface for its connection to the support bellows. A stabilizing inner ring may be provided, which has the same recesses for the passage of the line element or the electrical conductors and the same inner fastening recesses as the support bellows, the inner fastening recesses being provided for the connection of the inner ring to the support bellows and the line element.