MECHANICAL PROTECTION DEVICE

摘要

The invention relates to the field of mechanical protection devices comprising a transmission shaft (1) with a main axis of rotation (X) and an element (2) that can rupture in the event of a torsional overload, and in particular to a mechanical protection device further comprising a mobile part (3) secured to the transmission shaft (1) in rotation about the main axis (X) and able to move radially outwards with respect to the main axis (X) from a first position to a second position, a spring (4) for urging the mobile part (3) towards the first position, and a tangential end stop (8) able to arrest the rotation of the mobile part (3) about the main axis (X) when the mobile part (3) is in the second position. The mobile part (3) and the spring (4) are calibrated so that once a predetermined triggering angular velocity has been reached, the mobile part (3) moves from the first into the second position under the effect of a centrifugal force that is stronger than the preload of the spring (4).