Patent ID: 6575087
Filing Date: 2003-06-10
Classification: B30B

Abstract:
A press machine comprising:a slider; a suspension mechanism connected to the slider; and a drive mechanism which reciprocates the slider through the suspension mechanism, wherein the suspension mechanism includes: at least one first component having a first face and a second face dynamically opposing the first face, the first component receiving a pressing power; at least one second component having a third face opposing the first face through a first clearance, and a fourth face opposing the second face through a second clearance; a passageway communicated between the first and second clearances; a fluid which is pressurized and charged into the first and second clearances and the passageway, wherein a first pressure layer filled with the fluid is formed in the first clearance in a non-press load producing time, the fluid is flowed by a pressure increased in the first clearance into the second clearance through the passageway to form a second pressure layer filled with the fluid in a press load producing time, and disappearance of the first clearance and the first pressure layer brings the first and third faces into direct contact with each other, such that the pressing power is transmitted from the at least one first component to the at least one second component through the direct contact between the first and third faces; a slider positioning device including a female screw member wherein the slider positioning device adjusts a position of the slider by rotating the female screw member, and wherein the suspension mechanism includes: a connecting rod having a top end connected to the drive mechanism; a male screw member having a top end pin-joined to a bottom end of the connecting rod, and a bottom end screwed in the female screw member; a retainer having a top end connected to the female screw member so as to move upward and downward with the female screw member; a mounting member fixedly mounted between the retainer and the slider; and wherein the mounting member has a liquid-tight sealing member which liquid-tightly seals a lower portion of the female screw member and the retainer, the female screw member has a downward face and an upward face dynamically opposing the downward face, the liquid-tight sealing member has a first opposing face opposing the downward face of the female screw member, and the retainer has a second opposing face opposing the upward face of the female screw member.