Linear drive for railway carriage doors has spindle with spindle nut and follower to engage in groove in spindle which can be retracted in an emergency position

摘要

The linear drive for a railway carriage door has a spindle (18) with a working groove (20) and a spindle nut (22) with a follower (26). The follower engages the groove in a working position. The follower is movable out of the groove in an emergency. The follower is at right angles to the spindle axis and slides in the spindle nut.