| 摘要 |
The invention relates to an actuating device for a mechanical switching load, in particular having a load characteristic curve that is not continuously linear, e.g., for a motor-vehicle clutch having a clutch pressure point at which, for example, an increased actuating force is required. The actuating device comprises a servoactuator, which has an actuator motor and a speed-changing transmission. The invention is characterized in that the gear ratio of the transmission can be automatically adjusted by means of a preferably continuously transmission-ratio adjusting device in dependence on the actuating force transmitted to the switching load, for example, the clutch. Because of the automatic setting, or rather the thus load-dependent control, of the gear ratio of the transmission, a specific design of the actuator and the transmission or adaptation of the actuator and the transmission to the particular characteristic curve of the switching load to be actuated is no longer necessary, and it is no longer necessary to readjust the transmission ratio of the transmission or to readjust the servo actuator in the event of settling or wear, as is necessary even in the case of known transmission ratios, which are variable in a travel-based manner, of load actuators, such as clutch actuators. Furthermore, the load actuator, in particular the actuator motor, can be minimally dimensioned and thus designed in an installation-space-saving, weight-saving, and cost-saving manner thanks to the control of the gear ratio of the transmission, which control is automatically load-dependent according to the invention. |
