Positioning device for converting a rotary motion into a linear motion

Abstract

A positioning device for converting a rotary motion into a linear motion includes a drive unit configured to generate a torque, a drive shaft on which an eccentric is arranged, a coupling element comprising a slot, an output shaft arranged at the eccentric. The output shaft is configured to move in the slot of the coupling element. An adjusting element is connected with the coupling element. The adjusting element is supported so as to be linearly movable with the coupling element. The slot comprises a guide path configured to cooperate with the eccentric which comprises an angle with a plane perpendicular to a direction of movement of the adjusting element.

1 - 6 . (canceled) 
     
     
         7 . A positioning device for converting a rotary motion into a linear motion, the positioning device comprising:
 a drive unit configured to generate a torque;   a drive shaft on which an eccentric is arranged;   a coupling element comprising a slot;   an output shaft arranged at the eccentric, the output shaft being configured to move in the slot of the coupling element; and   an adjusting element connected with the coupling element, the adjusting element being supported so as to be linearly movable with the coupling element,   wherein, the slot comprises a guide path configured to cooperate with the eccentric which comprises an angle with a plane perpendicular to a direction of movement of the adjusting element.   
     
     
         8 . The positioning device as recited in  claim 7 , wherein the guide path is a curve with a changing slope. 
     
     
         9 . The positioning device as recited in  claim 7 , further comprising a roller or a bearing arranged on the output shaft, wherein the roller or bearing is configured to move in the slot. 
     
     
         10 . The positioning device as recited in  claim 7 , wherein an initial position of a rotation for an actuation of the adjusting element is a position that is located, seen in a direction of rotation, before a dead center existing for an axial movement of the output shaft, the dead center being passed during a rotational movement to an end position. 
     
     
         11 . The positioning device as recited in  claim 10 , further including a first part of the slot to be travelled by the output shaft and a second part of the slot to be travelled by the output shaft, wherein the first part of the slot to be traveled by the output shaft has an ascending slope with respect to a plane vertical with respect to a direction of movement of the adjusting element, and the second part of the slot to be traveled by the output shaft has a descending slope with respect to the plane vertical with respect to the direction of movement of the adjusting element. 
     
     
         12 . The positioning device as recited in  claim 11 , further including a circular arc with a slope, wherein the ascending slope in the first part of the slot to be traveled by the output shaft is steeper than the slope of the circular arc when the output shaft travels from a first end portion to a top dead center of the axial movement.