Linear drive system

A linear drive system having an actuator (10), which can be moved in a translatory manner by means of an electric drive (12) and which is coupled to a mechanical energy storage (16) in the form of a spring (32) such that, in the event of a loss of energy at the electric drive (12) or in an emergency operation, the actuator (10) travels to a predeterminable position and in so doing exerts an actuating force, wherein the electric drive (12) can be used to control a spindle drive (18) moving the actuator (10) in a translatory manner, wherein said spindle drive (18) has a threaded spindle (22) rotatably guided in a spindle housing (20), wherein said threaded spindle (22) interacts with the actuator (10) for the latter's motion via an adjustment nut (24) in engagement with the threaded spindle (22), wherein said adjustment nut (24) is non-rotatable but can be moved in a translatory manner in the spindle housing (20), and wherein said actuator (10) has a cylindrical tube (30) which, in each of its travel positions, is partially guided in the spindle housing (20) via the adjustment nut (24) and the free end (31) of which projects out of the spindle housing (20), characterized in that one free end of the spring (32) is supported at the free end of the spindle housing (20) and the other free end of the spring (32) is supported at a closing part (36) of the actuator (10) or at the actuator (10) itself and is tensioned in every travel position of the actuator (10).