ACTUATOR FOR ACTIVATING A HYDRAULIC CLUTCH ACTUATOR AND CLUTCH WHICH CAN BE ACTIVATED ELECTRICALLY

摘要

An actuator (13) for activating a piston (17) of a hydraulic clutch actuator such as can be used in a hydraulic system of a clutch system which can be activated electrically for a motor vehicle is described. An electric motor (11) drives an adjusting disk (55). A first slotted link structure (31) and a second slotted link structure (63) are arranged on the adjusting disk (55). The first slotted link structure (31) forms a pressing face (33), the radius (r) of which with respect to an axis (65) increases continuously from a minimum radius to a maximum radius. An activation rod (41) engages with a piston (17) of the clutch actuator and is guided and supported on the first slotted link structure (31) in such a way that when the adjusting disk (55) rotates a pressure is applied to the activation rod (41) by the first slotted link structure (31). The additionally provided second slotted link structure (63) is embodied here in such a way that in the event of opposing rotation of the adjusting disk (55) tension is applied at least in certain areas to the activation rod (41) by the second slotted link structure (63). Therefore, by using the second slotted link structure (63) the piston (17) of the clutch actuator can be pulled back beyond a snifter bore without a continuously acting spring having to be provided for this purpose.