| 摘要 |
The invention relates to a speed variator in which the rotary motion of the drive shaft (1) is turned into oscillatory motion of variable amplitude via eccentric discs (2a, 2b) whose eccentricity can ce controlled by means of a control device (3) incorporated in the drive shaft (1) and the oscillatory motion is turned into rotary motion of the output shaft (9) via unidirectional drive systems (6) comprising a freewheel system. According to the invention , the speed variator is characterized in that the control device (3) for the eccentric discs (2a, 2b), incorporated in the drive shaft (1), is of hydraulic, pneumatic or electromechanical construction and in that the respective unidirectional drive systems (6a-6d) are reversible in that they comprise a double acting freewheel system which is designed for driving the output shaft (9) in a first direction of drive and in a second, opposite direction of drive. |
