| 摘要 |
A press apparatus is disclosed which includes a bed, a pair of opposing ram guides fixedly mounted to the bed, and a ram slidably mounted to the ram guides for linear movement relative to the bed. A pair of pull links is arranged on opposing sides of the ram, and a pull link support shaft is provided to pivotably mount the lower ends of the pull links to the bed for pivotal movement together relative to the bed. A pair of lever links is arranged on opposing sides of the ram, and a lever link support shaft is provided to pivotally mount the pair of lever links to the ram for pivotal movement together relative to the ram. A first connecting shaft is provided to pivotally mount the upper end of each of the pull links to a respective one of the lever links. A reciprocating cylinder device is operatively connected to the lever links in order to selectively force the lever links to pivot together in first and second rotational directions relative to the ram when operated in first and second selected manners. Such pivoting of the lever links forces the pull links to pivot together relative to the bed and, in turn, forces the ram to move linearly relative to the ram guides.
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