Shielded Connector Housing Projection Engagement
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Solution Overview
Problem
The existing shielded connector structures for high-voltage devices in hybrid and electric vehicles suffer from deterioration of shielding performance due to weak points opposite the fastening points, which can lead to gaps under strong impact, compromising the connection's integrity.
Innovation Solution
The proposed shielded connector structure incorporates a circular insertion hole with an inner circumferential projected portion and a cutout portion, along with a projection portion on the housing that engages with the inner circumferential projected portion, ensuring a secure fixed state and preventing gap generation, while maintaining excellent workability through reduced rotation requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one-point fixing structure is adopted to reduce the number of fastening points, then device complexity and size are reduced, but the connection strength and reliability deteriorate under strong impact
Solution Approach 1:
The fixing structure is segmented into two functional parts: a bolt connection for primary fastening and an engagement structure (projection portion fitting into the circular insertion hole) for secondary constraint. This segmentation allows the system to maintain simplicity while distributing mechanical loads across multiple engagement points, preventing gap formation under impact forces.
2Reliability
If multiple fastening points are increased to improve connection strength, then reliability under impact improves, but device complexity and size increase
Solution Approach 1:
The bolt connection and the engagement structure (housing main body with projection portion fitting into the circular insertion hole) are merged into a unified fixing system. This combination creates a multi-point constraint that distributes impact forces while maintaining a compact design, avoiding the need for multiple separate fastening points.
3Manufacturing precision
If the housing is rotated during installation to align projection portion with cutout portion, then engagement precision is improved, but installation time increases
Solution Approach 1:
The circular insertion hole is pre-formed with a cutout portion positioned at a specific angular location, and the projection portion on the housing main body is pre-shaped to fit this cutout. This preliminary configuration of the engagement features allows for precise alignment to be achieved through a simple rotation operation, rather than requiring complex alignment procedures during installation.
Data Source
AI summary
A shielded connector structure includes a shielded wire for connecting a device, a shielded connector, and a metal member provided on the device. The shielded connector includes a terminal fitting, a shield terminal, a housing, and a bolt for fixing the housing to the metal member. The metal member includes a circular insertion hole and a female screw portion. The circular insertion hole includes an inner circumferential projected portion and a cutout portion that divides a part of the inner circumferential projected portion. The housing includes a cylindrical housing main body and a fixing flange portion. The housing main body includes a main body insertion portion inserted into the circular insertion hole and a projection portion which protrudes from an outer circumferential surface of the main body insertion portion in conformity with a position of the inner circumferential projected portion.