| 摘要 |
A linear step motor ( 1 ) comprises a shaft ( 2 ) which is longitudinally moveable in two opposite directions; two blocking devices ( 4, 5 ) arranged at a distance with which the shaft can alternately be fixed; at least one linear solid-type actuator for modifying the distance between said blocking devices being; one blocking device fixing the shaft when the at least one linear actuator changes the distance between the blocking devices in such a way that the blocking devices move towards each other, and the other blocking device fixing the shaft when the at least one linear actuator changes the distance between the blocking devices in such a way that the blocking devices moving away from each other, in order to displace the shaft in one direction; and an operation distance enlarging device ( 9 ) which is provided for the at least one linear actuator, the operation distance enlarging device comprising at least one lever arrangement with levers ( 11, 17 ) connected via joints ( 10,12,16,18 ) and with a gearing up lever ratio, the lever arrangement gearing up an operation distance of the linear actuator into an enlarged variation of the distance of the blocking devices, and all joints of the at least one operation distance enlarging device being solid-type joints.
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