Electric Compressor Housing Assembly With Spring Potential Equalization
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Solution Overview
Problem
The assembly of adjacent housing forming members in electric compressors is time-consuming and labor-intensive due to the need for precise insertion and potential equalization of a potential equalization member, which complicates the equalization of potentials and sealing between these members.
Innovation Solution
Incorporating a potential equalization member with an insertion portion and a contact portion that extends between mating surfaces, forming a spring structure to ensure contact and equalization without precise alignment, facilitating easier assembly and maintaining potential equality between housing forming members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a potential equalization member is inserted into facing insertion holes in adjacent housing forming members, then potentials of the housing forming members are equalized, but assembly time and effort increase due to the need for precise insertion and alignment
Solution Approach 1:
The contact portion is formed with a spring structure that provides flexibility, allowing it to deform and make contact with the mating surface without requiring precise alignment during assembly. This flexible spring structure maintains reliable potential equalization while significantly reducing assembly time and effort.
Solution Approach 2:
The spring structure changes the physical state of the contact portion from rigid to elastic, enabling it to adapt to variations in mating surface positions and maintain reliable contact. This parameter change allows the potential equalization function to be achieved without precise insertion control.
2Reliability
If the contact portion is made with a specific thickness for reliable contact, then potential equalization is ensured, but manufacturing precision requirements increase
Solution Approach 1:
The spring structure replaces the need for precise thickness control with elastic deformation capability. The contact portion can accommodate thickness variations through spring deformation, maintaining reliable contact without requiring high manufacturing precision for the thickness parameter.
Solution Approach 2:
The contact portion transitions from a static rigid structure to a dynamic spring structure that can deform elastically. This dynamic characteristic allows the system to compensate for manufacturing tolerances and maintain reliable contact over a range of thickness values.
Data Source
AI summary
An electric compressor includes: a compression part; an electric motor; an inverter; a housing including a plurality of housing forming members made of metal; a seal member that has an insulation property and is provided between the housing forming members adjacent to each other; and a potential equalization member that is made of metal and is in contact with both the adjacent housing forming members to equalize potentials of the adjacent housing forming members. The adjacent housing forming members include mating surfaces, respectively. An insertion hole is formed in one of the mating surfaces of the adjacent housing forming members, at a position in which the seal member is not provided. The potential equalization member includes an insertion portion inserted into the insertion hole, and a contact portion that is a plate portion extending in a gap between the mating surfaces and is in contact with both the mating surfaces.