ASSEMBLY COMPRISING A SECURITY APPARATUS EQUIPPING A LIFTING DEVICE, IN PARTICULAR A WINCH, AND SYSTEM FOR ACTUATING SAID APPARATUS
This assembly (1) comprises a security apparatus (2) equipping a lifting device, in particular a winch, and a system (3) for actuating said apparatus; the security apparatus (2) comprises a toothed wheel (5), wedged on the shaft of the lifting device, and a worm (6) meshing with said toothed wheel. According to the invention, said assembly (1) also comprises: -a splined shaft (15) secured to one end of the worm (6); -a pocketed wheel (21) with inner and outer splines, engaged on the splined shaft (15); -an elastic member (22)between the pocketed wheel (21)and a stop piece(23); -a drive wheel (20) with a splined hub, with which the pocketed wheel (21) is capable of engaging rotationally; -a back-up motor (35), capable of rotating the drive wheel (20).