| 摘要 |
The invention relates to an actuating apparatus for sliding doors. It comprises a propulsive device consisting of an electric motor having preferably thermally protected coils and having its axial shaft coupled to an endless screw 3 supported by a pair of roller bearings which allow its axial displacement limited by a coaxial helical spring in contact with the end of the shaft and pushed by means of the position of a nut adjustable in the threaded head of the said shaft and fixable by means of a radial screw also cooperating in fixing the position of the shaft and of the endless screw 3, a second helical spring of larger diameter, likewise arranged coaxially relative to the shaft and tightened by means of a threaded ring nut in a cylindrical projection which branches off from the apparatus housing 1 and which serves as a receptacle for the push device and is completed by a protective cover. <IMAGE> |
