| 摘要 |
The invention relates to an actuator (11) comprising a drive element (13) which can be rotated about a rotational axis (R), an output element (15) which can be rotated about the rotational axis (R), and a coupling device via which the drive element (13) is coupled to the output element (15) forming torsional backlash. The coupling device comprises a transmission element (17) which is coupled to the output element (15) in a rotationally fixed manner and which can be moved between a rest position and an operating position relative to the output element (15). The transmission element (17) is rotationally secured in the rest position by a brake device (21) and can be rotated about the rotational axis (R) in the operating position, wherein the transmission element (17) is preloaded in the rest position by a spring device (27). The coupling device is designed such that, starting from the rest position of the transmission element (17), via an initial rotational movement of the drive element (13) using up the torsional backlash, the transmission element (17) can be moved against the spring preload into the operating position, and that, after the operating position is reached, the transmission element (17) can be driven to carry out a rotational movement by another rotational movement of the drive element (13) in order to thus also drive the output element (15) to carry out a rotational movement. |
