Patent ID: 7152523
Filing Date: 2006-12-26
Classification: B30B

Abstract:
1. A press machine, comprising: drive means for operating a slide in a cycle; a press center on said slide; a first and a second guide member on said press machine; a line between said first and said second guide members passing through said press center; said slide receiving a driving force from said drive means, and alignment said first and said second guide members with said press center eliminating rotational forces upon said slide and guiding said slide in said cycle along a common centerline, thereby increasing press machine precision, operational life, and rigidity; a frame supporting said drive means and said slide; said frame having a continuous shape symmetrical about said press center; a crank shaft and a main gear in said drive means; said main gear having a position eccentric about said crank shaft; a first link extending perpendicular from said crank shaft; a second link rotatably couples said first link to said main gear and increases and transmits said drive force from said main gear to said crank shaft whereby said slide operates in said cycle; a top and a bottom dead center position on said slide; said main gear rotatably disposed on said frame a gear section of said drive shaft operably joined to said main gear; said crank shaft rotatably disposed on said frame; an eccentric section on said crank shaft; a connecting rod operably coupling said crank shaft to said slide; a first angle operably defined between said first and second link whereby said first angle is at a maximum at said bottom dead center position and at a minimum at said top dead center position; and a rotation axis of said main gear and a rotation axis of said crank shaft are eccentric along a common center line, whereby a speed of said slide is at a minimum at said bottom dead center and a maximum at said top dead center position thereby increasing a pressing force at said bottom dead center position.