Disengageable force regulator for linear electric screwjack

摘要

The invention concerns a device making it possible to firstly limit the dynamic or static force applied to a linear electric jack with a reversible screw/nut system, and secondly translation-disengage the screw of the jack. This device is formed of an element (2) integral with the screw (7) of the jack and an element (1) integral with the activated load and interconnected by a friction system (3). The force applied on the screw (7) tends to make the latter rotate inside the screw (8) of the jack. This rotation is stopped by the friction system (3) until the latter slides and separates the elements (1) and (2). The screw (7) then rotates with respect to the element (1) which limits the force. The replacement of the friction element (3) by a coupling makes it possible to externally control the rotation and translation of the screw (7). The end of travel stops (13) secured to the screw (7) rotate with this screw whilst retaining their characteristics.