| 摘要 |
<p>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.</p> |
