US 6,629,494 B2Granted

Slide driving device for a press machine

AssigneeAida Engineering, Ltd.

InventorShozou Imanishi

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Abstract

A slide driving device for a press machine is driven by a first and second upper toggle link mechanisms pivotably mounted above a slide. The upper toggle links include first links connected at a connecting link along a common tangent line. The connecting link is driven by a connecting rod receiving eccentric movement from a crank shaft. The upper toggle links also include second links, each connected to lower toggle links. The lower toggle links operate a plunger and drive a slide. Alternative embodiments allow adaptive positions of the upper toggle links and crank shaft along with multiple lengths for the first and second links. A dynamic balancer, is not necessary for operation, but may be added to minimize vibration. Together, these embodiments provide a slide driving device with minimized vibration and simplified construction.

Claims16

Dependent claims

A slide driving device comprising:

at least first and second upper toggle means;
a first rotation center on said first upper toggle means;
a second rotation center on said second upper toggle means;
each of said first and second rotation centers permitting each of said first and second upper toggle means to rotate in an arc;
a first point pin on each said first and second upper toggle means;
a left first link connecting said first rotation center to said first point pin on said first upper toggle means;
a right first link connecting said second rotation center to said first point pin on said second upper toggle means;
a connecting link connecting said first and second upper toggle means at said first point pins on a common inner tangent line to each said arc where said left and right first links are parallel;
a single connecting rod connected to said connecting link;
a first and second plunger for driving a slide in a cycle;
said first and second plungers operably connected to said first and second upper toggle means;
said connecting link being effective to transfer a linear guiding displacement to said first and second upper toggle means;
and
said first and second upper toggle means transferring said linear guiding displacement to said plungers whereby said slide operates through said cycle.

11 more elements

A slide driving device for a press machine, comprising:

a left and a right upper toggle link equidistant from a common center;
said left and right upper toggle links pivotably mounted on respective fixed support point pins;
a first support link on each said left and right upper toggle links;
each said first support link being operable in an arc;
each said first support links having equal lengths;
a connecting link operably connecting each said first support links along a common inner tangent line to each said arc when said first support links are parallel to each other;
a single connecting rod connecting said connecting link to an eccentric portion on a crank shaft;
first and second lower toggle links connecting second support point pins on said left and right upper toggle links along a second link;
said second links located on each said left and right upper toggle link;
said second links rotatably connected to said left and right lower toggle links and to at least left and right points on a slide;
and
said connecting rod transmitting a linear guiding displacement to said left and right upper toggle links and said lower toggle links, to said slide to drive said slide through a displacement cycle.

9 more elements

Dependencies are inferred from the claim text.