Analytical and Multibody Modelling of a Quick-Release Hook Mechanism. Bruzzone, L., Bonatti, D., Berselli, G., & Fanghella, P. Volume 47. Analytical and Multibody Modelling of a Quick-Release Hook Mechanism, pages 523–531. 2017.
Analytical and Multibody Modelling of a Quick-Release Hook Mechanism [link]Paper  Analytical and Multibody Modelling of a Quick-Release Hook Mechanism [pdf]Paper  doi  abstract   bibtex   
Quick-Release Hooks (QRH) are particular accessories for connecting chains or metal ropes, that can be remotely unfastened under full-load conditions via application of an external force with limited magnitude. Despite their wide- spread use, and aside from a number of patents, the scientific literature related to QRH performance is rather limited. This paper reports about the modelling of a class of QRH, which relies on the use of a four-bar linkage mechanism operating in the proximity of a singularity configuration. Design graphs depicting the main functional parameters are reported. At last, a multibody model of the system is developed, which validates the analytical results while providing an insight of the frictional forces effect on the device modelling and performance.

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