#$%^&*AU2020239641A120201015.pdf#####ABSTRACT A surgical assembly, comprising an instrument drive unit； a surgical loading unit including an end effector； and an instrument drive connector interconnecting the instrument drive unit and the surgical loading unit, the instrument drive connector supporting a locking assembly including: a first drive member movable between a non-locking position in which the first drive member does not prevent attaching or detaching of the surgical loading unit to the instrument drive connector and a locking position in which the first drive member prevents attaching or detaching of the surgical loading unit to the instrument drive connector； a first drive screw operably coupled to the instrument drive unit； and a first drive nut driven by the first drive screw and coupled to the first drive member, the first drive nut drivable to move the instrument drive connector to: a load state in which the first drive member is free to move between the non-locking and locking positions； an unload state in which the first drive member is driven to the non-locking position； and a locked state in which the first drive member is driven to the locking position. 32
