| 摘要 |
PROBLEM TO BE SOLVED: To provide an angular positioning device with three dead centers.SOLUTION: An angular positioning device 10 comprises an assembly of connecting rods 11 to 15 and an assembly of pivot connections, the axes Xto Xof which are parallel to one another. A first input connecting rod 11, a second output connecting rod 13 and a third connecting rod 14 are in pivot connection with a frame of the device. A fourth and a fifth connecting rods 12 and 15 are each connected by two pivot connections to two other connecting rods of the device. The input connecting rod 11 can be rotated by a motor. The angular positioning device 10 is configured such that the output connecting rod 13 can adopt three distinct angular positions &thetas;, &thetas;and &thetas;for each of which two connecting rods in pivot connection with one another generate a dead center in the device. |
