| 摘要 |
An electromechanical driving actuator with a damping device comprises an electric motor (26) comprising a stator (9) and a hollow rotor (3), the stator (9) enclosing the rotor (3), which rotor having a base end and an operational end. The electromechanical actuator further comprises a retractable shaft (4) having a cavity and mounted coaxially with the rotor (3) in such a manner that one end portion of the retractable shaft (4) is arranged in the cavity of the rotor, the shaft's end portion being formed as a tubular member (8) having a bottom end and an operational end. The electromechanical driving actuator further comprises an internally-threaded bushing (1) mounted within the tubular member (8) and rigidly connected thereto, externally-threaded rollers (7) mounted within the threaded bushing (1) circumferentially so that the rollers' axes are parallel to the rotor's axis and the rollers' thread engages the internal thread of the threaded bushing (1), an externally-threaded screw member (2) having a support end and an actuating end, the screw member being located within the threaded bushing (1) coaxially with the rotor (3) in such a manner that the screw member's thread engages the thread of the rollers (7) and that the support end of the screw member (2) is rigidly connected to the rotor (3). The actuating end of the screw member (2) is arranged in the cavity of the retractable shaft (4). The retractable shaft can be moved between the maximum extended position and the maximum retracted position thereof defined, respectively, by disk-spring packs (5, 6). Non-rotatable disk-spring pack (5) is rigidly fixed at the base end of the rotor (3) from the interior thereof so as to be rotated in conjunction with the rotor and is adapted to engage the operational end of the tubular member (8). Rotatable disk-spring pack (6) is rigidly fixed at the bottom end of the tubular member (8) from the outside thereof and is adapted to engage the operational end of the rotor from the interior thereof. The electromechanical driving actuator provides a rapid and precise movement of the operating member and simultaneously damps oscillations arising in the extreme positions of the retractable shaft. |
