Presses – Reciprocating press construction – With mechanical force multiplier
Patent
1976-01-19
1977-03-22
Wilhite, Billy J.
Presses
Reciprocating press construction
With mechanical force multiplier
100286, B30B 114
Patent
active
040130037
ABSTRACT:
A plurality of toggle drive mechanisms are provided for transferring rotational shaft movement as linear movement of a press ram guidably supported in a press frame. Each of the toggle joint drive mechanisms includes a triangular shaped drive member eccentrically driven by a crankshaft, which drive member is pivotally connected to a pair of respective facing link members, which link members in turn are pivotally attached one each to the press frame and the press ram. The pivotal connection of the link members to the drive members are at corners of the triangle facing away from the smallest acute angle corner of the guide member. In one preferred embodiment, four separate such toggle joint drive mechanisms are provided for a single press ram and are connected by way of lower link members at four respective ram coupling points of the press ram. Other preferred embodiments include only two ram coupling points, with symmetrical drive being obtained by way of pin members interconnecting triangular guide members at opposite sides of a third triangular guide member, and with one of the sets of link members being connected to these pins so that the link members are symmetrically arranged with respect to link members attached at the third guide member.
REFERENCES:
patent: 2085648 (1937-06-01), Glasner
patent: 3817139 (1974-06-01), Desai
Finsterwalder Kurt
Riedisser Gunter
L. Schuler GmbH
Wilhite Billy J.
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