4mm Rope Pulley

thingiverse

Hi,\r\n\r\nI purchased a car trailer equipped with a removable lid, but realized that taking it off would require at least two additional people to accomplish safely and efficiently.\r\nSo I engineered a pulley system designed to detach the lid solo, as the 60kg weight of the lid demanded significant mechanical leverage. Since pulling rope is more challenging than lifting an object directly, I calculated that I needed a 16x mechanical advantage to manage the rope effectively, allowing me to carry the weight with relative ease.\r\nI gained valuable experience from my initial design, which I will not disclose, and this second iteration has proven to be highly successful.\r\n\r\nThis pulley system utilizes a 4mm rope sourced from a penny store in Germany (1€ Laden), combined with 7x70 DIN 5299 snap hooks and 6082RS bearings. To prevent parts from being pressed into the thread, I selected bolts that extended beyond the shaft's support, resulting in threads protruding excessively; I plan to shorten them using my lathe.\r\n\r\nFuture designs may focus on creating pulleys with less mechanical advantage for smaller applications, contingent upon sufficient user feedback.