Inner Lock

Our design features a rotating circular element that synchronizes the release of all locks through a simple rotational motion, ensuring precise and efficient operation. We used an internally toothed spur gear to transfer motion to this element, relying on a minimal external force to activate a preloaded torsion spring. Once triggered, the spring releases its stored energy, providing the necessary torque to rotate the gear and unlock the locks. The system is maintained in a locked state using a ratchet mechanism, where a preloaded tension spring keeps the pawl engaged with the ratchet teeth. The pawl acts as a lever, generating a downward force that ensures the ratchet remains locked. When the system is activated, an external pin disengages the pawl, releasing the torsion spring’s energy to initiate the unlocking sequence. Additionally, when designing the system, we carefully considered the spring configuration and elements mass to minimize the risk of failure or unintended activation caused by inertial forces. More details on this can be found in the report. This approach ensures reliable and synchronized operation while mitigating potential risks. This work was carried out by, https://grabcad.com/renzo.d.amelio-1, https://grabcad.com/ignacio.bertran-1, https://grabcad.com/ivan.nieto.funes-2 and Agustin Manzo as part of the course "Synthesis of Mechanisms and Machines" in the Mechanical Engineering program at the National University of Rosario.