| 摘要 |
A power press with an eccentric for the vertical reciprocation of a hammer has its drive shaft eccentrically journaled in bearing sleeves whose common axis is horizontally offset from the shaft axis whereby a torque is exerted upon the sleeves by the reaction force of a workpiece struck by the hammer. The sleeves, which are themselves rotatably mounted in the press frame, are integral with horizontally extending arms which tend to swing about the sleeve axis in response to the exerted torque, such swinging being normally prevented by a frictional, fluidic or elastic counterforce acting upon the free ends of the arms.
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