| 摘要 |
In a device (11) for converting a rotary motion into translational motions, which has a crank disc (12) driven in rotation and a crank arm (15) rotatably mounted in the said disc by means of a hinge pin (16), the crank arm (15) can be driven positively as a function of the angular velocity of the crank disc (12) counter to the direction of rotation of the latter via a concentrically arranged fixed gearwheel (18), an intermediate wheel engaging in the said gearwheel and rotatably mounted on the crank disc (12), and a gearwheel held rotationally fixed on the hinge pin (16). In addition, the transmission ratio of the gearwheel (25) arranged on the hinge pin (16) of the crank arm (15) to the fixed gearwheel (18) is 1 : 2 and the free end of the crank arm (15) is held in a manner which allows the said crank arm to be displaced with its axis perpendicular to the adjusting device in a guiding member (27) secured on the part to be driven. This driving device is thus not only of small construction and economical to manufacture but, above all, makes it possible to drive an actuating element at high speed while nevertheless achieving high operational reliability. A large adjustment path, corresponding to the diameter of the crank disc (12) and the length of the crank arm (15), is furthermore achieved and, since the individual parts, are positively connected to one another, trouble-free operation is guaranteed even at high driving speeds. <IMAGE>
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