| 摘要 |
The invention concerns a pedal-operated clutch device (1) for motor vehicles, in particular for agricultural tractors. The clutch (2) is operated entirely by muscle power. Sensitive engagement and disengagement of the clutch (2) combined with easy pedal travel are achieved without external or power-assisted actuation. To this end, a pressure piece (10) of the clutch (2) can be moved against the force of a disk spring (23) in the direction of opening of the clutch (2). According to the invention, the disk spring (23) has a characteristic curve (K) with a negative gradient, and in order to modify the total transmission (i), the pressure piece (10) has a shape which enables the profile of the force to be applied to the clutch pedal (22) to be defined. Preferably the force to be applied to the pedal remains essentially constant, relative to the travel of the clutch pedal (22). |
