Connector Nut Accommodation With Recessed Corners
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Solution Overview
Problem
Conventional connectors with ribbed nut accommodation portions experience precision issues due to scraping and dimensional errors, leading to tilting or floating of the nut, while rib-less designs fail to accommodate nuts properly.
Innovation Solution
A connector design featuring a nut accommodation portion with a tetragonal through hole and recessed corners, which expands the contour to accommodate dimensional differences and prevent scraping, ensuring high precision and secure nut positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rib is formed on the inner wall surface of the nut accommodation portion, then the nut can be accommodated properly, but chips created by scraping will collect on the bottom surface and cause tilting or floating of the nut, lowering positioning precision
Solution Approach 1:
The harmful rib structure is completely removed from the nut accommodation portion. Instead of having a ribbed inner wall surface that causes scraping, the patent uses a smooth accommodation hole with a recessed portion at the bottom, eliminating the source of chip generation while maintaining proper nut accommodation
Solution Approach 2:
A recessed portion is formed at the bottom of the accommodation hole before nut installation. This preliminary structural feature prevents chips from accumulating by providing a dedicated collection area, and ensures proper nut positioning before the nut is even press-fitted into place
2Object-generated harmful factors
If the rib is not formed on the inner wall surface, then scraping and chip collection are avoided, but dimensional errors may hinder accommodation of the nut in the nut accommodation portion
Solution Approach 1:
The accommodation hole features a localized recessed portion at the bottom rather than a uniform rib structure throughout. This local modification provides dimensional tolerance and accommodation for manufacturing variations specifically where needed (at the bottom surface), while keeping the inner wall surface smooth to prevent scraping
Solution Approach 2:
The patent changes the geometric parameters of the accommodation hole by adding a recessed portion with specific dimensions (depth and diameter). This parameter modification creates clearance space that absorbs dimensional errors and tolerances, ensuring reliable nut accommodation without requiring precise rib dimensions
Data Source
AI summary
A connector includes a nut accommodation portion into which a nut is press-fitted and accommodated in a press-fitting direction. The nut accommodation portion includes an accommodation hole, which extends through a connector housing in the press-fitting direction of the nut, and an upper surface of a terminal connection portion of a connection terminal, which is exposed from the accommodation hole. The accommodation hole includes a through hole, which has a tetragonal shape as viewed in the press-fitting direction of the nut, and a recessed portion, which is formed in each of four corners of the through hole. The recessed portions are recessed toward an outer side of the through hole to locally expand a contour of the through hole.