US 5,509,351 A · Dynamically balanced mechanical pressing machine

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.

Claims4

Dependent claims

In a mechanical pressing machine wherein a slider, connected through a connecting rod to a crankshaft to which a rotational force of a motor is transmitted, is slidingly moved vertically relative to a frame;

the improvement comprising a balance weight, support means connected to said slider for supporting said balance weight on said slider for slidable movement on said slider in a direction opposite to the direction of movement of said slider whereby the inertia force of said balance weight is opposite to the inertia force of said slider and is applied substantially directly to said slider.

Dependencies are inferred from the claim text.

Dynamically balanced mechanical pressing machine

Life of this patent

Dynamically balanced mechanical pressing machine

Life of this patent

Abstract

Claims4