Shunt Resistor Electrode Fixing with Separate Screwing Members
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Solution Overview
Problem
Existing methods for fixing a shunt resistor to a busbar or circuit board using bolts and nuts are cumbersome and lack sufficient strength, especially when dealing with copper electrodes, which have low hardness, and can result in inadequate fixation and positioning issues.
Innovation Solution
The use of separate screwing members, such as bolts and nuts, that are fixed to the electrodes of the shunt resistor allows for easy and secure fixation of busbars or circuit boards, enabling the selection of materials with sufficient strength and minimizing the processing required for the electrode holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If screwing members are integrated with the electrode, then the fixing structure becomes simpler, but the fixing strength becomes insufficient and the electrode material must be harder
Solution Approach 1:
The invention divides the fixing structure into separate components: the electrode and the screwing member are independent of each other. The electrode maintains its simple copper plate structure while the screwing member (bolt and nut) provides the necessary fixing strength. This segmentation resolves the contradiction by allowing each component to optimize its own function without compromising the other.
2Ease of operation
If holes are made large enough for free movement of screwing members, then installation becomes easier, but the positioning precision and fixing accuracy deteriorate
Solution Approach 1:
The invention applies preliminary action by pre-forming precise holes in the electrode at the exact positions where screwing members need to be fixed. These pre-formed holes guide the screwing members during assembly, ensuring accurate positioning while still allowing easy insertion. This resolves the contradiction by preparing the fixing locations in advance with the required precision.
Data Source
AI summary
To provide a shunt resistor and a current detection device including the shunt resistor, to which a busbar, a board, and the like can be easily fixed with sufficient strength wherein only minimum processing of electrodes is required. Screwing members (bolt (14) and nut (15)) that are separate members from electrodes (12) of the resistor (10), are fixed on the electrodes (12). The current detection device includes the shunt resistor (10), which has at least a pair of electrodes (12). One screwing member (14) fixed beforehand on at least one electrode (12) is screw fastened with the other screwing member (15) while disposing a prescribed intervening member (20) between the one screwing member and the other screwing member. Here, the prescribed intervening member (20) includes a board mounting a current detection circuit thereon and/or busbars.