EV Charger Sealing Part for Waterproof Assembly
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Solution Overview
Problem
Existing electric vehicle chargers face challenges in achieving a reliable waterproof structure, particularly when metal components are involved, leading to difficulties in assembly and sealing, which can compromise the charger's operation in adverse weather conditions.
Innovation Solution
The electric vehicle charger incorporates a sealing part with integrated components such as a partition wall blocking part, main sealing part, and mounting sealing part, featuring cutouts and protrusions for improved assembly and sealing, allowing for easier integration of the upper and lower cases and enhanced waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate sealing members are provided for sealing the space between upper and lower cases, then waterproofing function is achieved, but assembly process becomes complex and difficult to perform
Solution Approach 1:
The patent combines multiple separate sealing members (main sealing member and mounting sealing member) into a single integrated sealing part. This sealing part includes a main sealing portion for sealing the space between upper and lower cases, and a mounting sealing portion for sealing the bushing insertion hole, both integrated into one component that can be installed as a single unit, thereby simplifying the assembly process while maintaining waterproofing functionality.
2Strength
If bushing insertion hole has inner diameter less than outer diameter of bushing, then press-fit connection is achieved, but waterproofing becomes difficult and foreign substances may be introduced
Solution Approach 1:
The patent segments the sealing function into two distinct portions within a single sealing part: a main sealing portion that seals the space between upper and lower cases, and a mounting sealing portion that seals the bushing insertion hole. This segmentation allows the mounting sealing portion to prevent foreign substance introduction while the main sealing portion maintains the waterproofing function, resolving the contradiction between press-fit connection and waterproofing.
3Shape
If metal ring is hung on end of wire, then cable structure is formed, but cable cannot pass through bushing insertion hole
Solution Approach 1:
The patent introduces a bushing as an intermediary component that facilitates cable passage. The bushing is inserted into the bushing insertion hole and provides a guide structure that allows the cable with metal ring to pass through smoothly. The mounting sealing portion of the sealing part seals around the bushing, ensuring waterproofing while the bushing itself enables easy cable installation by mediating between the cable structure and the insertion hole.
Data Source
AI summary
Provided is an electric vehicle charger. The electric vehicle charger includes a lower case including a front partition wall having a cable penetration cutoff part that is cut to pass in forward and backward directions, an upper case including a front partition wall having a cable penetration cutoff part that is cut to pass in forward and backward directions, a sealing part having at least one portion disposed between the upper case and the lower case, and a cable passing though a portion of the upper case and a portion of the lower case, the cable being coupled between the upper case and the lower case.