| 摘要 |
An electro-mechanical drive apparatus uses a single variable speed motor (20 ), two one-way clutches (42, 66), and a hydraulic accumulator (48) to provide both hydraulic power for the linear motion axes and rotation of the plasticizing screw (14) in an injection molding machine. When engaged, the first one-way clutch (42) couples the drive motor (20) to the pump stack (26 ), while the second one-way clutch (66) couples the motor (20) to the feed scre w (14). During rotation of the drive motor (20) in a forward direction, (a) th e first one-way clutch (42) engages, rotating the shaft of the hydraulic pump stack (26) to power the machines hydraulic systems and charge the accumulato r (48); and (b) the second one-way clutch slips. When the drive motor (20) is rotated in a reverse direction, (a) the second one-way clutch (66) engages, rotating the feed screw (14), and (b) the first one-way clutch (42) slips. Preferably, the drive apparatus is associated with a double shaft motor (20) mounted adjacent separate drive couplings for the feed screw (14) and hydraulic pump stack (26).
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