Abstract：The operating efficiency of remotely operated vehicle (ROV) could be improved by replacing its tool library quickly.The butt locking mechanism of ROV tool library is the key device for the replacing operation.We design such a butt locking mechanism according to the ISO 13628-8 (2002) standard. The principle of cylinder locking mechanism is introduced, as well as the locking force calculation formulas.Meanwhile, the hydraulic force is reduced through optimizing the structural parameters of the locking finger.
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