Cranks
Introduction
The connecting rod-crank mechanism is an ancient mechanism that transforms a circular movement into a translational movement, or vice versa. The most common current example is found in the internal combustion engine of an automobile, in which the linear movement of the piston produced by the explosion of gasoline is transmitted to the connecting rod and is converted into circular movement in the crankshaft.
In schematic form, this mechanism is created with two bars joined by a revolute joint. The rotating end of the bar (the crank) is attached to a fixed point, the center of rotation, and the other end is attached to the connecting rod. The remaining end of the connecting rod is attached to a piston that moves in a straight line.
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References
- [1] ↑ Grewe, Klaus (2010), «La máquina romana de serrar piedras. La representación en bajorrelieve de una sierra de piedras de la antigüedad, en Hierápolis de Frigia y su relevancia para la historia técnica», Las técnicas y las construcciones de la ingeniería romana (Miguel Ordóñez, trad.), V Congreso de las Obras Públicas Romanas, pp. 381-401 . (para descargar el artículo se necesita registrarse, gratuitamente, en el sitio web).: http://www.traianvs.net/pdfs/2010_15_grewe.pdf
- [2] ↑ Grewe, Klaus (2009), «Die Reliefdarstellung einer antiken Steinsägemaschine aus Hierapolis in Phrygien und ihre Bedeutung für die Technikgeschichte. Internationale Konferenz 13.−16. Juni 2007 in Istanbul», en Bachmann, Martin, ed., Bautechnik im antiken und vorantiken Kleinasien, Byzas (en alemán) 9, Estambul: Ege Yayınları/Zero Prod. Ltd., pp. 429-454 (429), ISBN 978-975-807-223-1, archivado desde el original el 11 de mayo de 2011 .: https://web.archive.org/web/20110511200049/http://www.freundeskreis-roemerkanal.de/Text/BAUTECHNIK%20IM%20ANTIKEN%20UND.pdf
- [3] ↑ Ritti, Tullia; Grewe, Klaus; Kessener, Paul (2007), «A Relief of a Water-powered Stone Saw Mill on a Sarcophagus at Hierapolis and its Implications», Journal of Roman Archaeology (en inglés) 20: 138-163 (161) .