Terminal Connection Structure with Staggered Ribs
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Solution Overview
Problem
Conventional terminal connection structures with ribs at the same height hinder the insertion of terminals onto stud bolts, making it difficult to attach nuts reliably and efficiently, especially when upward force is applied to the wire.
Innovation Solution
A terminal connection structure with ribs at different heights on the stud bolt, featuring a tubular protection wall with guide slope surfaces and latch surfaces to prevent upward detachment of the terminal, allowing easy insertion and secure attachment of nuts to the stud bolt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ribs are provided at the same height to prevent detachment of the terminal, then the terminal cannot be detached upward, but it becomes difficult to insert the terminal under the ribs when using the stud bolt method
Solution Approach 1:
The single rib structure is segmented into multiple ribs (first rib and second rib) positioned at different heights. This segmentation allows the terminal insertion process to occur in stages: the terminal first passes under the lower first rib, then under the higher second rib, making insertion feasible while maintaining secure retention
Solution Approach 2:
The ribs are positioned asymmetrically at different heights rather than at the same height. This asymmetric arrangement creates a stepped configuration that facilitates terminal insertion by providing progressive engagement points, while still preventing upward detachment through the highest rib
2Reliability
If ribs are provided at the same height to secure the terminal, then upward detachment is prevented, but the attachment process becomes complex requiring wire holding operations
Solution Approach 1:
The terminal is preliminarily positioned and secured by the first rib at the lower height before the nut attachment is completed. This preliminary securing action eliminates the need for additional wire holding operations during nut attachment, simplifying the overall process while ensuring secure terminal attachment
3Device complexity
If ribs are provided at the same height, then the structure is simple, but the terminal cannot be easily inserted when using stud bolt method
Solution Approach 1:
The rib structure extends into the vertical dimension with ribs positioned at different heights rather than only in the horizontal plane. This dimensional arrangement maintains structural simplicity while enabling easy terminal insertion through the vertical stacking of engagement points
Data Source
AI summary
In a terminal connection structure, a stud bolt is stood and inserted into a hole of a top plate portion of a terminal, and the nut is screwed and fastened to the stud bolt on the top plate, thus connecting the terminal to the stud bolt. A terminal accommodation section is formed by a tubular wall around the stud bolt. It has an opening and ribs at a part of a circumference thereof, and allows the terminal fixed to the stud bolt from above. The opening is formed so as to fit on a belt portion extending from the top plate portion toward a fixing portion of the terminal. The ribs are protruded on the protection wall. The ribs prevent the terminal from being detached upward when the terminal is being temporarily lifted. The ribs are arranged at different heights in a top-bottom direction of the stud bolt.