Dynamically balanced mechanical pressing machine

Details Dynamically balanced mechanical pressing machine Dynamically balanced mechanical pressing machine

1994-08-22

1996-04-23

Gerrity, Stephen F.

Presses

Reciprocating press construction

With mechanical force multiplier

83615, B30B 106

Patent

active

055093515

ABSTRACT:
There is disclosed a mechanical pressing machine utilizing a crankshaft, in which an unbalanced inertia force produced during a reciprocal movement of a slider is canceled without producing a flexure in the whole of the pressing machine, thereby enhancing a dynamic precision. A balance weight, which is equivalent in weight to the slider vertically slidably supported on a frame, is slidably mounted on an upper portion of the slider for vertical sliding movement. The slider is driven through a first crankshaft and a connecting rod, and at the same time the balance weight is driven in a direction opposite to the direction of movement of the slider through a first gear fixedly mounted on the first crankshaft, a second gear, an intermediate shaft, flexible couplings, a second crankshaft and a connecting rod. As a result, an inertia force produced in the slider is canceled by an oppositely-directed inertia force of the balance weight.

REFERENCES:
patent: 2321325 (1943-06-01), Sherman et al.
patent: 4375785 (1983-03-01), Schoch et al.

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