Fusible Link Unit Asymmetric Locking for Vibration Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional component units affixed to objects, such as batteries in vehicles, face instability due to tolerances, leading to potential damage from vibrations, as the components can become unfastened and unstable when connected with members like bus bars.
Innovation Solution
A component unit design featuring a case with locking portions and guide ribs, where one locking portion is closer to the connected position than the other, allowing for adjustable gaps to stabilize the component within the case, and a guide rib extending along the vertical direction to enhance securement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a case is designed to accommodate a component with maximum size considering tolerances, then the component can be accommodated by absorbing tolerance, but the component may be unfastened inside the case and become unstable when connected with connection members
Solution Approach 1:
The locking mechanism is divided into multiple locking portions (first locking portion and second locking portion) distributed at different positions on the component. This segmentation allows each locking portion to independently engage with corresponding case features, providing distributed stability that accommodates manufacturing tolerances while preventing component movement.
Solution Approach 2:
Different locking portions are designed with different gap sizes relative to the case - the first locking portion has a larger gap while the second locking portion has a smaller gap. This local differentiation allows the structure to accommodate tolerance variations at different locations, with the tighter second locking portion providing stable positioning while the larger first gap allows for assembly flexibility.
2Ease of manufacture
If the component is affixed inside the case in an unstable position, then assembly may be easier, but the component or connection member may be damaged when force is applied due to vibration
Solution Approach 1:
The locking portions are pre-configured in specific positions on the component before assembly. The first locking portion is positioned to engage with a corresponding feature in the case, and the second locking portion is positioned to engage with another case feature. This preliminary positioning ensures that when the component is installed, it automatically assumes a stable, pre-determined position that resists vibration while maintaining ease of assembly.
Solution Approach 2:
The locking portions are arranged asymmetrically on the component - the first locking portion has a larger gap to the case while the second locking portion has a smaller gap. This asymmetric arrangement provides stable positioning that prevents movement under vibrational forces while allowing straightforward assembly, as the larger gap facilitates insertion and the smaller gap provides precise positioning.
Data Source
AI summary
Provided is a fusible link unit in which a case includes case-side locking portions to be locked in a fusible link so as to affix the fusible link, the fusible link includes fusible link-side locking portions locked in the case-side locking portions, the fusible link-side locking portion on one side in a longitudinal direction is provided closer to a connected position of a bus bar than the fusible link-side locking portion on the other side in the longitudinal direction, and a gap size between the fusible link-side locking portion on the one side and the case-side locking portion in a vertical direction is made greater than a gap size between the fusible link-side locking portion on the other side and the case-side locking portion in the vertical direction.