| 摘要 |
A driving device for linearly driving a movable part of a machine using a linear motor, which is capable of compensating a reactive force of a thrust of the linear motor in acceleration and deceleration within the device. A first linear motion frame (49) with magnet plates (48,50) is connected to an injection screw (12) of an injection molding machine, as the movable part of the machine. The magnet plates (48,50) and stators (47,51) disposed to face the magnet plates (48,50) constitute an obverse-motion linear motor. A second linear motion frame (43) with magnet plates (42,44) is provided, and stators (41,45) are disposed to face the magnet plates (42,44) to form a reverse-motion linear motor. The first linear motion frame (49) and the second linear motion frame (43) are interconnected by a linear-motion interconnecting mechanism (60) such as a linkage mechanism movably in directions opposite to each other. The first linear motion frame (49) and the second linear motion frame (43) are moved in the opposite directions by the obverse-motion linear motor and the reverse-motion linear motor, respectively, to cancel reactive forces of thrusts of the linear motors in acceleration and deceleration. <IMAGE> |
